import React, { useEffect, useState, useLayoutEffect, useRef } from 'react';
import { fetchWithAuth, postWithAuth, postFormDataWithAuth } from '../fetchWithAuth';
import JSZip from 'jszip';
// Animación fade-in/slide-up para bloques
const fadeInSlideUp = `@keyframes fadein-slideup { 0% { opacity: 0; transform: translateY(40px); } 100% { opacity: 1; transform: translateY(0); } }`;
if (typeof document !== 'undefined' && !document.getElementById('fadein-slideup-documents')) {
  const style = document.createElement('style');
  style.id = 'fadein-slideup-documents';
  style.innerHTML = fadeInSlideUp;
  document.head.appendChild(style);
}
import { fetchDocuments } from '../api/expedientes.ts';
import { useNotification } from '../context/NotificationContext';
import { usePolling } from '../hooks/usePolling';
import { Link } from 'react-router-dom';

const API_URL = import.meta.env.VITE_EFC_API_URL;

const downloadFile = async (id, filename = 'archivo', setSuccess, setError, showMessage) => {
  try {
    console.log('Descargar: ',id);
    const res = await fetchWithAuth(`${API_URL}/record/documents/descargar/${id}/`);
    
    if (!res.ok) {
      //alert('No autorizado o error en la descarga');
      showMessage('No autorizado o error en la descarga.', 'error');
      return false;
    }
    
    const blob = await res.blob();
    const url = window.URL.createObjectURL(blob);
    const a = document.createElement('a');
    a.href = url;
    a.download = filename;
    document.body.appendChild(a);
    a.click();
    a.remove();
    window.URL.revokeObjectURL(url);
    if (setSuccess) setSuccess('Descarga exitosa');
  } catch (error) {
    console.error('Error downloading file:', error);
    showMessage('Error al descargar el archivo', 'error');
    return false;
  }
  return true;
};

export default function Documents() {
  const focusKeeperRef = useRef(null);
  const fileInputRef = useRef(null);
  const [success, setSuccess] = useState('');
  const [currentPage, setCurrentPage] = useState(1);
  const [itemsPerPage, setItemsPerPage] = useState(10);
  const [alertaFilter, setAlertaFilter] = useState('all'); // all, true, false
  const [expedienteFilter, setExpedienteFilter] = useState('all'); // all, true, false
  const [contribuyenteFilter, setContribuyenteFilter] = useState('');
  const [contribuyenteInput, setContribuyenteInput] = useState('');
  const [fechaPagoFilter, setFechaPagoFilter] = useState('');
  const [pedimentoFilter, setPedimentoFilter] = useState('');
  const [searchFilter, setSearchFilter] = useState('');
  const [curpApoderadoFilter, setCurpApoderadoFilter] = useState('');
  const [patenteFilter, setPatenteFilter] = useState('');
  const [aduanaFilter, setAduanaFilter] = useState('');
  const [tipoOperacionFilter, setTipoOperacionFilter] = useState('');
  const [clavePedimentoFilter, setClavePedimentoFilter] = useState('');
  const { showMessage } = useNotification();
  
  // Estados para selección múltiple
  const [selectedDocuments, setSelectedDocuments] = useState([]);
  const [isSelectAll, setIsSelectAll] = useState(false);
  
  // Estado para modal de confirmación de eliminación
  const [showDeleteModal, setShowDeleteModal] = useState(false);
  
  // Estados para subir expedientes
  const [showUploadModal, setShowUploadModal] = useState(false);
  const [selectedFiles, setSelectedFiles] = useState([]);
  const [uploadType, setUploadType] = useState('folders'); // 'folders', 'zip', 'rar'
  const [uploadingFiles, setUploadingFiles] = useState(false);
  const [isUploading, setIsUploading] = useState(false);
  const [uploadProgress, setUploadProgress] = useState(0);
  const [isCompressing, setIsCompressing] = useState(false);
  const [compressionProgress, setCompressionProgress] = useState(0);
  const [validationErrors, setValidationErrors] = useState([]);
  const [importadores, setImportadores] = useState([]);
  const [selectedContributor, setSelectedContributor] = useState('');
  const [loadingContributors, setLoadingContributors] = useState(false);
  
  // Estado para controlar la animación de entrada
  const [showAnimation, setShowAnimation] = useState(false);
  const [hasAnimated, setHasAnimated] = useState(false);
  useLayoutEffect(() => {
    // Forzar un render antes de activar la animación
    setShowAnimation(true);
  }, []);
  useEffect(() => {
    if (showAnimation && !hasAnimated) {
      const timeout = setTimeout(() => {
        setHasAnimated(true);
        setShowAnimation(false);
      }, 700); // Duración igual a la animación
      return () => clearTimeout(timeout);
    }
  }, [showAnimation, hasAnimated]);

  // Fetching usando la función tipada de TypeScript
  const fetchPedimentosData = async (page = currentPage, pageSize = itemsPerPage) => {
    // Construir objeto de filtros
    const filters = {
      search: searchFilter || undefined,
      pedimento_app: pedimentoFilter || undefined, 
      existe_expediente: expedienteFilter === 'all' ? undefined : expedienteFilter,
      contribuyente: contribuyenteFilter || undefined,
      curp_apoderado: curpApoderadoFilter || undefined,
      fecha_pago: fechaPagoFilter || undefined,
      patente: patenteFilter || undefined,
      aduana: aduanaFilter || undefined,
      tipo_operacion: tipoOperacionFilter || undefined,
      clave_pedimento: clavePedimentoFilter || undefined,
    };
    return await fetchDocuments(page, pageSize, filters);
  };

  // Hook de polling que se ejecuta cada 30 segundos
  const { data: pedimentos, loading, error, refetch } = usePolling(
    () => fetchPedimentosData(currentPage, itemsPerPage),
    30000, // 30 segundos
    [currentPage, itemsPerPage, searchFilter, pedimentoFilter, expedienteFilter, alertaFilter, contribuyenteFilter, curpApoderadoFilter, fechaPagoFilter, patenteFilter, aduanaFilter, tipoOperacionFilter, clavePedimentoFilter]
  );

  // Manejo de errores de sesión
  useEffect(() => {
    if (error && error.message === 'SESSION_EXPIRED') {
      localStorage.removeItem('access');
      localStorage.removeItem('refresh');
      showMessage('Tu sesión ha expirado, por favor inicia sesión de nuevo.', 'error');
      setTimeout(() => {
        window.location.href = '/login';
      }, 2000);
    } else if (error) {
      showMessage(error.message, 'error');
    }
  }, [error, showMessage]);

  // Cálculos de paginación usando la estructura tipada
  const documentsArray = pedimentos && pedimentos.results ? pedimentos.results : [];
  const totalDocuments = pedimentos && typeof pedimentos.count === 'number' ? pedimentos.count : 0;
  const totalPages = totalDocuments > 0 ? Math.ceil(totalDocuments / itemsPerPage) : 1;
  const currentDocuments = documentsArray;

  // Obtener lista única de contribuyentes para el combobox (de la página actual)
  const contribuyentes = Array.from(new Set(currentDocuments.map(d => d.contribuyente).filter(Boolean)));


  // Refuerza la paginación SPA: nunca recarga la página, solo cambia el estado local
  const handlePageChange = (newPage, e) => {
    if (e && typeof e.preventDefault === 'function') e.preventDefault();
    if (e && typeof e.stopPropagation === 'function') e.stopPropagation();
    if (newPage < 1 || newPage > totalPages || newPage === currentPage) return;
    setCurrentPage(newPage);
    // Quitar el foco del botón activo para evitar salto de scroll
    if (typeof document !== 'undefined' && document.activeElement instanceof HTMLElement) {
      document.activeElement.blur();
    }
  };

  // Forzar foco al div invisible para evitar saltos por enfoque automático
  useLayoutEffect(() => {
    if (focusKeeperRef.current) {
      focusKeeperRef.current.focus();
    }
  }, [currentPage]);

  const handleItemsPerPageChange = (newItemsPerPage) => {
    setItemsPerPage(newItemsPerPage);
    setCurrentPage(1); // Reset a la primera página
  };

  // Funciones para manejo de selección múltiple
  const handleSelectDocument = (documentId, isSelected) => {
    if (isSelected) {
      setSelectedDocuments(prev => [...prev, documentId]);
    } else {
      setSelectedDocuments(prev => prev.filter(id => id !== documentId));
    }
  };

  const handleSelectAll = () => {
    if (isSelectAll) {
      setSelectedDocuments([]);
      setIsSelectAll(false);
    } else {
      const allDocumentIds = currentDocuments.map(doc => doc.id);
      setSelectedDocuments(allDocumentIds);
      setIsSelectAll(true);
    }
  };

  // // Función para descargar documentos seleccionados
  // const handleDownloadSelected = async () => {
  //    if (selectedDocuments.length === 0) {
  //      showMessage('No hay documentos seleccionados para descargar', 'warning');
  //      return;
  //    }

  //    try {
  //      showMessage(`Iniciando descarga de ${selectedDocuments.length} documento(s)...`, 'info');
  //      const resultados = [];
  //      for (const docId of selectedDocuments) {
  //        const document = currentDocuments.find(doc => doc.id === docId);
  //        if (document) {
  //          // const exito =await downloadFile(docId, `expediente_${document.pedimento_app}`, null, null, showMessage);
  //          const exito =await downloadExpediente(docId, `expediente_${document.pedimento_app}`, null, showMessage);
  //          resultados.push(exito);
  //          // Pequeña pausa entre descargas para no sobrecargar
  //          await new Promise(resolve => setTimeout(resolve, 500));
  //        }
  //      }
  //      const todosExitosos = resultados.every(Boolean);
  //      if(todosExitosos){
  //       showMessage(`Descarga completada de ${selectedDocuments.length} documento(s)`, 'success');
  //      }else{
  //       showMessage('Algunas descargas fallaron. Revisa los archivos seleccionados.', 'warning');
  //      }
       
  //      setSelectedDocuments([]);
  //      setIsSelectAll(false);
  //    } catch (error) {
  //      showMessage('Error durante la descarga masiva', 'error');
  //    }
  //   // showMessage('Error durante la descarga masiva', 'error');
  // };
  // Función para descargar documentos seleccionados
  const handleDownloadSelected = async () => {
     if (selectedDocuments.length === 0) {
       showMessage('No hay documentos seleccionados para descargar', 'warning');
       return;
     }

     try {
      
       showMessage(`Iniciando descarga de ${selectedDocuments.length} documento(s) selecciobado(s)...`, 'info');

       const res = await postWithAuth(`${API_URL}/record/documents/multi-pedimento-zip/`, {
          pedimento_ids: selectedDocuments
        });

        if (!res.ok){
          showMessage('Algunas descargas fallaron. Revisa los archivos seleccionados.', 'warning');
        }else {
          // Leer el nombre que eligió el backend
          const zipFileName = res.headers.get('X-Zip-Filename') || 'expedientes.zip';
          const blob = await res.blob();
          const url = window.URL.createObjectURL(blob);
          const a = document.createElement('a');
          a.href = url;
          a.download = zipFileName;
          a.click();
          a.remove();
          window.URL.revokeObjectURL(url);
          showMessage(`Descarga completada de ${selectedDocuments.length} documento(s)`, 'success');

          setSelectedDocuments([]);
          setIsSelectAll(false);
        }
       
     } catch (error) {
       showMessage('Error durante la descarga masiva', 'error');
     }
    // showMessage('Error durante la descarga masiva', 'error');
  };


  // Función para descargar todo el expediente
  const handleDownloadTodoElExpediente = async (pedimentoId, pedimentoName) => {
    
     try {
       showMessage(`Iniciando descarga de ${selectedDocuments.length} documento(s)...`, 'info');
       const resultados = [];

       const document = currentDocuments.find(doc => doc.id === pedimentoId);
      if (document) {
           const exito =await downloadExpediente(pedimentoId, `expediente_${pedimentoName}`, null, showMessage);
           resultados.push(exito);
           // Pequeña pausa entre descargas para no sobrecargar
           await new Promise(resolve => setTimeout(resolve, 500));
         }

       const todosExitosos = resultados.every(Boolean);
       if(todosExitosos){
        showMessage(`Descarga completada de ${selectedDocuments.length} documento(s)`, 'success');
       }else{
        // showMessage('Algunas descargas fallaron. Revisa los archivos seleccionados.', 'warning');
       }
       
       setSelectedDocuments([]);
       setIsSelectAll(false);
     } catch (error) {
       showMessage('Error durante la descarga masiva', 'error');
     }
};

const downloadExpediente = async (pedimentoId, pedimentoName, setSuccess, showMessage) => {
  try {
        const res = await postWithAuth(`${API_URL}/record/documents/expediente-zip/`, {
      pedimento_id: pedimentoId,
    });
    
    if (!res.ok) {
      // alert('No autorizado o error en la descarga');
      // showMessage('No autorizado o error en la descarga.', 'error');
      const err = await res.json();
      showMessage(err.error || 'Error al generar ZIP', 'error');
      return false;
    }
    
    const blob = await res.blob();
    const url = window.URL.createObjectURL(blob);
    const a = document.createElement('a');
    a.href = url;
    a.download = `${pedimentoName}.zip`;
    // document.body.appendChild(a);
    a.click();
    a.remove();
    window.URL.revokeObjectURL(url);
    if (setSuccess) setSuccess('Descarga exitosa');
  } catch (error) {
    console.error('Error downloading file:', error);
    showMessage('Error al descargar el archivo', 'error');
    return false;
  }
  return true;
};

  // Función para eliminar documentos seleccionados
  const handleDeleteSelected = async () => {
    if (selectedDocuments.length === 0) {
      showMessage('No hay documentos seleccionados para eliminar', 'warning');
      return;
    }

    // Mostrar modal de confirmación
    setShowDeleteModal(true);
  };

  // Función para confirmar la eliminación
  const confirmDelete = async () => {
    setShowDeleteModal(false);

    try {
      showMessage(`Eliminando ${selectedDocuments.length} documento(s)...`, 'info');
      
      // Enviar todos los IDs seleccionados a un endpoint específico
      const response = await fetchWithAuth(`${API_URL}/customs/pedimentos/bulk-delete/`, {
        method: 'POST',
        headers: {
          'Content-Type': 'application/json',
        },
        body: JSON.stringify({
          ids: selectedDocuments
        })
      });
      
      if (!response.ok) {
        const errorData = await response.json().catch(() => null);
        throw new Error(errorData?.detail || errorData?.message || `Error ${response.status}: ${response.statusText}`);
      }
      
      const result = await response.json();
      
      showMessage(
        `${result.deleted_count || selectedDocuments.length} documento(s) eliminado(s) exitosamente`, 
        'success'
      );
      
      setSelectedDocuments([]);
      setIsSelectAll(false);
      
      // Refrescar la lista
      refetch();
    } catch (error) {
      console.error('Error durante la eliminación masiva:', error);
      showMessage(`Error durante la eliminación: ${error.message}`, 'error');
    }
  };

  // Funciones para subir expedientes
  const fetchImportadores = async () => {
    if (importadores.length > 0) return; // Ya están cargados
    
    setLoadingContributors(true);
    try {
      const response = await fetchWithAuth(`${API_URL}/customs/importadores/`);
      if (response.ok) {
        const data = await response.json();
        // La API devuelve directamente el array, no un objeto con results
        setImportadores(Array.isArray(data) ? data : []);
      } else {
        throw new Error('Error al cargar importadores');
      }
    } catch (error) {
      console.error('Error loading importadores:', error);
      showMessage('Error al cargar la lista de importadores', 'error');
    } finally {
      setLoadingContributors(false);
    }
  };

  const handleFileSelect = (event) => {
    const files = Array.from(event.target.files);
    setSelectedFiles(files);
  };

  const validateFolderNomenclature = (files) => {
    // Patrón flexible: [AÑO(2 dígitos opcional)]-[ADUANA(2-3 dígitos)]-[PATENTE(4 dígitos)]-[PEDIMENTO(7 dígitos)]
    // El año puede estar presente o ausente, si está presente debe ser 2 dígitos
    // La aduana puede ser 2 o 3 dígitos
    const pattern = /^(\d{2}-)?(\d{2,3})-(\d{4})-(\d{7})$/;
    const invalidFolders = [];
    
    for (const file of files) {
      const pathParts = file.webkitRelativePath.split('/');
      if (pathParts.length > 1) {
        const folderName = pathParts[0];
        if (!pattern.test(folderName)) {
          invalidFolders.push(folderName);
        }
      }
    }
    
    return invalidFolders;
  };

  // Función para comprimir carpetas en ZIP
  const compressFoldersToZip = async (files) => {
    const zip = new JSZip();
    const folderGroups = {};
    
    // Agrupar archivos por carpeta
    files.forEach(file => {
      const pathParts = file.webkitRelativePath.split('/');
      const folderName = pathParts[0];
      
      if (!folderGroups[folderName]) {
        folderGroups[folderName] = [];
      }
      folderGroups[folderName].push(file);
    });

    const folderNames = Object.keys(folderGroups);
    const compressedFiles = [];
    
    setIsCompressing(true);
    setCompressionProgress(0);

    try {
      // Comprimir cada carpeta individualmente
      for (let i = 0; i < folderNames.length; i++) {
        const folderName = folderNames[i];
        const folderFiles = folderGroups[folderName];
        
        const folderZip = new JSZip();
        
        // Agregar archivos al ZIP de la carpeta
        folderFiles.forEach(file => {
          // Mantener la estructura de subcarpetas dentro de la carpeta principal
          const relativePath = file.webkitRelativePath.substring(folderName.length + 1);
          folderZip.file(relativePath, file);
        });
        
        // Generar el ZIP de la carpeta
        const zipBlob = await folderZip.generateAsync(
          { type: "blob" },
          (metadata) => {
            // Actualizar progreso de compresión
            const folderProgress = metadata.percent;
            const totalProgress = ((i * 100) + folderProgress) / folderNames.length;
            setCompressionProgress(Math.round(totalProgress));
          }
        );
        
        // Crear un archivo File a partir del blob
        const zipFile = new File([zipBlob], `${folderName}.zip`, { type: 'application/zip' });
        compressedFiles.push(zipFile);
      }
      
      return compressedFiles;
    } finally {
      setIsCompressing(false);
      setCompressionProgress(0);
    }
  };

  // Función para manejar la selección de archivos
  const handleFileSelection = (event) => {
    const files = Array.from(event.target.files);
    
    if (uploadType === 'folders') {
      // Para carpetas, agregar a los archivos existentes (acumular)
      setSelectedFiles(prevFiles => [...prevFiles, ...files]);
      setValidationErrors([]);
      
      // Validar nomenclatura de todas las carpetas después de agregar
      setTimeout(() => {
        setSelectedFiles(currentFiles => {
          const invalidFolders = validateFolderNomenclature(currentFiles);
          if (invalidFolders.length > 0) {
            setValidationErrors([
              `Las siguientes carpetas no siguen la nomenclatura correcta ([AÑO]-ADUANA-PATENTE-PEDIMENTO): ${invalidFolders.join(', ')}`
            ]);
          }
          return currentFiles;
        });
      }, 100);
    } else {
      // Para ZIP/RAR, también permitir acumular múltiples archivos
      setSelectedFiles(prevFiles => [...prevFiles, ...files]);
      setValidationErrors([]);
    }
    
    // Limpiar el input para permitir seleccionar la misma carpeta nuevamente
    event.target.value = '';
  };

  // Función para eliminar una carpeta específica
  const removeFolderFromSelection = (folderNameToRemove) => {
    setSelectedFiles(prevFiles => 
      prevFiles.filter(file => !file.webkitRelativePath.startsWith(folderNameToRemove + '/'))
    );
    setValidationErrors([]);
  };

  // Función para eliminar un archivo específico (ZIP/RAR)
  const removeFileFromSelection = (fileIndex) => {
    setSelectedFiles(prevFiles => 
      prevFiles.filter((_, index) => index !== fileIndex)
    );
    setValidationErrors([]);
  };

  const handleUploadFiles = async () => {
    if (!selectedContributor) {
      showMessage('Por favor selecciona un importador', 'warning');
      return;
    }

    if (selectedFiles.length === 0) {
      showMessage('Por favor selecciona al menos un archivo', 'warning');
      return;
    }

    // Validar nomenclatura si es tipo carpeta
    if (uploadType === 'folders') {
      const invalidFolders = validateFolderNomenclature(selectedFiles);
      if (invalidFolders.length > 0) {
        setValidationErrors([
          `Las siguientes carpetas no siguen la nomenclatura correcta ([AÑO]-ADUANA-PATENTE-PEDIMENTO): ${invalidFolders.join(', ')}`
        ]);
        return;
      }
    }

    setIsUploading(true);
    setUploadProgress(0);

    try {
      const formData = new FormData();
      
      formData.append('contribuyente', selectedContributor);
      
      let filesToUpload = selectedFiles;
      
      // Comprimir carpetas automáticamente
      if (uploadType === 'folders') {
        showMessage('Comprimiendo carpetas...', 'info');
        filesToUpload = await compressFoldersToZip(selectedFiles);
        formData.append('tipo', 'zip'); // Cambiar tipo a zip después de comprimir
      } else {
        formData.append('tipo', uploadType);
      }
      
      // Agregar archivos al FormData
      if (uploadType === 'folders') {
        // Para carpetas comprimidas, agregar como múltiples archivos ZIP
        filesToUpload.forEach((file, index) => {
          formData.append(`archivos`, file);
        });
      } else {
        // Para ZIP/RAR múltiples, agregar cada archivo
        filesToUpload.forEach((file, index) => {
          formData.append(`archivos`, file);
        });
      }

      const fileCount = uploadType === 'folders' ? filesToUpload.length : selectedFiles.length;
      showMessage(`Subiendo ${fileCount} archivo(s)...`, 'info');

      const uploadEndpoint = `${API_URL}/customs/pedimentos/bulk-create/`;
      const result = await postFormDataWithAuth(uploadEndpoint, formData);
      
      if(!result.ok){
        let errorMsg = 'Error al intentar cargar los archivos';
        try {
            const errorData = await result.json();
            errorMsg = errorData.error || errorMsg;
        } catch {
          // Si no es JSON válido, usar texto plano
          const text = await result.text();
          errorMsg = text || errorMsg;
        }
        showMessage(errorMsg, 'error');
      }else{
        showMessage(
          `${result.uploaded_count || fileCount} archivo(s) subido(s) exitosamente`,
          'success'
        );
      }

      // showMessage(
      //     `${result.uploaded_count || fileCount} archivo(s) subido(s) exitosamente`,
      //     'success'
      //   );

     // console.log(result);

      // Limpiar archivos seleccionados y cerrar modal
      setSelectedFiles([]);
      setSelectedContributor('');
      setUploadProgress(0);
      setCompressionProgress(0);
      setValidationErrors([]);
      setShowUploadModal(false);

      // Refrescar la lista
      refetch();
    } catch (error) {
      console.error('Error durante la subida:', error);
      showMessage(`Error durante la subida: ${error.message}`, 'error');
    } finally {
      setIsUploading(false);
    }
  };

  // Actualizar isSelectAll cuando cambia la selección
  useEffect(() => {
    if (currentDocuments.length > 0) {
      const allSelected = currentDocuments.every(doc => selectedDocuments.includes(doc.id));
      setIsSelectAll(allSelected && selectedDocuments.length > 0);
    }
  }, [selectedDocuments, currentDocuments]);

  // Limpiar selección cuando cambia de página
  useEffect(() => {
    setSelectedDocuments([]);
    setIsSelectAll(false);
  }, [currentPage]);

  //  función que detecta si hay filtros activos
  const hasActiveFilters = [
  searchFilter,
  pedimentoFilter,
  expedienteFilter !== 'all',
  contribuyenteFilter,
  curpApoderadoFilter,
  fechaPagoFilter,
  patenteFilter,
  aduanaFilter,
  tipoOperacionFilter,
  clavePedimentoFilter,
].some(Boolean);

  // El layout principal y la tabla siempre se renderizan, loader/error/empty solo dentro del área de la tabla

  return (
    <div className="min-h-screen p-4 bg-gradient-to-br from-slate-50 via-blue-50 to-indigo-100 sm:p-6 lg:p-8">
      <div ref={focusKeeperRef} tabIndex={-1} style={{position:'absolute',width:0,height:0,overflow:'hidden',outline:'none'}} aria-hidden="true"></div>
      <div className="mx-auto max-w-7xl">
        {/* Header mejorado y decorativo */}
        <div className={
          "mb-6 sm:mb-8 relative overflow-hidden rounded-3xl shadow-2xl bg-gradient-to-r from-blue-600 via-blue-700 to-blue-800 p-6 sm:p-8 flex items-center gap-4 sm:gap-6"+
          (showAnimation && !hasAnimated ? ' animate-fadein-slideup opacity-0' : '')
        }
        style={showAnimation && !hasAnimated ? { animation: 'fadein-slideup 0.7s cubic-bezier(0.22,1,0.36,1) 0.05s forwards' } : undefined}>
          <div className="flex-shrink-0 p-3 rounded-full shadow-lg bg-white/20 backdrop-blur-sm sm:p-4 animate-bounce-slow">
            <svg className="w-8 h-8 text-white sm:h-10 sm:w-10" fill="none" stroke="currentColor" viewBox="0 0 24 24">
              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M9 12h6m-6 4h6m2 5H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z" />
            </svg>
          </div>
          <div className="flex-1 min-w-0">
            <h1 className="flex flex-col gap-2 mb-1 text-2xl font-extrabold tracking-tight text-white sm:text-3xl lg:text-4xl sm:flex-row sm:items-center">
              <span>Expedientes</span>
              {totalDocuments > 0 && (
                <span className="inline-block px-3 py-1 text-xs font-semibold text-white rounded-full shadow-lg bg-white/20 backdrop-blur-sm sm:text-sm animate-fade-in">
                  {totalDocuments} registros
                </span>
              )}
            </h1>
            <p className="text-sm font-medium leading-relaxed text-blue-100 sm:text-lg">Gestiona y descarga los documentos de tus pedimentos</p>
          </div>
          {/* Efectos decorativos de fondo modernos */}
          <div className="absolute pointer-events-none select-none -top-10 -right-10 opacity-20">
            <div className="w-32 h-32 rounded-full bg-white/10 blur-xl"></div>
          </div>
          <div className="absolute pointer-events-none select-none -bottom-6 -left-6 opacity-15">
            <div className="w-24 h-24 rounded-full bg-white/10 blur-lg"></div>
          </div>
          {/* Partículas flotantes */}
          <div className="absolute inset-0 overflow-hidden pointer-events-none">
            <div className="absolute w-2 h-2 rounded-full top-1/4 left-1/4 bg-white/30 animate-ping"></div>
            <div className="absolute w-1 h-1 rounded-full top-3/4 right-1/3 bg-white/40 animate-pulse"></div>
            <div className="absolute w-3 h-3 rounded-full top-1/2 right-1/4 bg-white/20 animate-bounce"></div>
          </div>
        </div>
        {/* Animación personalizada para el icono y contador */}
        <style>{`
          @keyframes bounce-slow {
            0%, 100% { transform: translateY(0) scale(1); }
            50% { transform: translateY(-8px) scale(1.05); }
          }
          .animate-bounce-slow {
            animation: bounce-slow 3s infinite;
          }
          @keyframes fade-in {
            from { opacity: 0; transform: scale(0.9) translateY(10px); }
            to { opacity: 1; transform: scale(1) translateY(0); }
          }
          .animate-fade-in {
            animation: fade-in 0.8s ease-out;
          }
        `}</style>

        <div className={
          "bg-white shadow-2xl rounded-3xl border border-gray-100 overflow-hidden"+
          (showAnimation && !hasAnimated ? ' animate-fadein-slideup opacity-0' : '')
        }
        style={showAnimation && !hasAnimated ? { animation: 'fadein-slideup 0.7s cubic-bezier(0.22,1,0.36,1) 0.15s forwards' } : undefined}>
          <div className="px-4 py-4 border-b border-gray-200 sm:px-6 sm:py-6 bg-gradient-to-r from-gray-50 to-blue-50/30">
            {/* Filtros avanzados */}
            <div className="mb-4 sm:mb-6">
              <h3 className="flex items-center mb-3 text-sm font-semibold text-gray-800">
                <svg className="w-4 h-4 mr-2 text-blue-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                  <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M3 4a1 1 0 011-1h16a1 1 0 011 1v2.586a1 1 0 01-.293.707l-6.414 6.414a1 1 0 00-.293.707V17l-4 4v-6.586a1 1 0 00-.293-.707L3.293 7.414A1 1 0 013 6.707V4z" />
                </svg>
                Filtros de búsqueda
              </h3>
              <div className="grid grid-cols-1 gap-3 sm:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4 sm:gap-4">
                {/* Search global */}
                <div className="flex flex-col">
                  <label className="text-xs font-semibold text-gray-700 mb-1.5">Buscar</label>
                  <input
                    type="text"
                    value={searchFilter}
                    onChange={e => setSearchFilter(e.target.value)}
                    placeholder="Buscar pedimento, contribuyente..."
                    className="w-full border border-gray-300 rounded-xl px-3 py-2.5 text-sm focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-blue-500 bg-white shadow-sm transition-all duration-200 hover:shadow-md"
                  />
                </div>
                {/* Pedimento_app */}
                <div className="flex flex-col">
                  <label className="text-xs font-semibold text-gray-700 mb-1.5">Pedimento</label>
                  <input
                    type="text"
                    value={pedimentoFilter}
                    onChange={e => setPedimentoFilter(e.target.value)}
                    placeholder="Número de pedimento..."
                    className="w-full border border-gray-300 rounded-xl px-3 py-2.5 text-sm focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-blue-500 bg-white shadow-sm transition-all duration-200 hover:shadow-md"
                  />
                </div>
                {/* Expediente */}
                <div className="flex flex-col">
                  <label className="text-xs font-semibold text-gray-700 mb-1.5">Expediente</label>
                  <select value={expedienteFilter} onChange={e => setExpedienteFilter(e.target.value)}
                    className="w-full border border-gray-300 rounded-xl px-3 py-2.5 text-sm focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-blue-500 bg-white shadow-sm transition-all duration-200 hover:shadow-md">
                    <option value="all">Todos</option>
                    <option value="true">Con expediente</option>
                    <option value="false">Sin expediente</option>
                  </select>
                </div>
                {/* Contribuyente combobox */}
                <div className="relative flex flex-col">
                  <label className="text-xs font-semibold text-gray-700 mb-1.5">Contribuyente</label>
                  <input
                    type="text"
                    value={contribuyenteInput}
                    onChange={e => {
                      setContribuyenteInput(e.target.value);
                      setContribuyenteFilter(e.target.value);
                    }}
                    onBlur={e => {
                      setContribuyenteFilter(e.target.value);
                    }}
                    placeholder="Buscar o escribir..."
                    className="w-full border border-gray-300 rounded-xl px-3 py-2.5 text-sm focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-blue-500 bg-white shadow-sm transition-all duration-200 hover:shadow-md"
                    autoComplete="off"
                  />
                  {/* Dropdown de sugerencias */}
                  {contribuyenteInput && (
                    <div className="absolute left-0 right-0 z-50 overflow-auto bg-white border border-gray-200 shadow-2xl top-16 rounded-xl max-h-40">
                      {contribuyentes.filter(c => c.toLowerCase().includes(contribuyenteInput.toLowerCase())).length === 0 ? (
                        <div className="px-3 py-2 text-sm text-gray-500">Sin coincidencias</div>
                      ) : (
                        contribuyentes.filter(c => c.toLowerCase().includes(contribuyenteInput.toLowerCase())).map(c => (
                          <button
                            key={c}
                            type="button"
                            className="w-full px-3 py-2 text-sm text-left transition-colors duration-200 hover:bg-blue-50 first:rounded-t-xl last:rounded-b-xl"
                            onClick={() => {
                              setContribuyenteFilter(c);
                              setContribuyenteInput('');
                            }}
                          >
                            {c}
                          </button>
                        ))
                      )}
                    </div>
                  )}
                </div>
                {/* CURP Apoderado */}
                <div className="flex flex-col">
                  <label className="text-xs font-semibold text-gray-700 mb-1.5">CURP Apoderado</label>
                  <input
                    type="text"
                    value={curpApoderadoFilter}
                    onChange={e => setCurpApoderadoFilter(e.target.value)}
                    placeholder="CURP del apoderado..."
                    className="w-full border border-gray-300 rounded-xl px-3 py-2.5 text-sm focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-blue-500 bg-white shadow-sm transition-all duration-200 hover:shadow-md"
                  />
                </div>
                {/* Fecha de pago */}
                <div className="flex flex-col">
                  <label className="text-xs font-semibold text-gray-700 mb-1.5">Fecha de pago</label>
                  <input type="date" value={fechaPagoFilter} onChange={e => setFechaPagoFilter(e.target.value)}
                    className="w-full border border-gray-300 rounded-xl px-3 py-2.5 text-sm focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-blue-500 bg-white shadow-sm transition-all duration-200 hover:shadow-md" />
                </div>
                {/* Patente */}
                <div className="flex flex-col">
                  <label className="text-xs font-semibold text-gray-700 mb-1.5">Patente</label>
                  <input
                    type="text"
                    value={patenteFilter}
                    onChange={e => setPatenteFilter(e.target.value)}
                    placeholder="Patente..."
                    className="w-full border border-gray-300 rounded-xl px-3 py-2.5 text-sm focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-blue-500 bg-white shadow-sm transition-all duration-200 hover:shadow-md"
                  />
                </div>
                {/* Aduana */}
                <div className="flex flex-col">
                  <label className="text-xs font-semibold text-gray-700 mb-1.5">Aduana</label>
                  <input
                    type="text"
                    value={aduanaFilter}
                    onChange={e => setAduanaFilter(e.target.value)}
                    placeholder="Aduana..."
                    className="w-full border border-gray-300 rounded-xl px-3 py-2.5 text-sm focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-blue-500 bg-white shadow-sm transition-all duration-200 hover:shadow-md"
                  />
                </div>
                {/* Tipo de operación */}
                <div className="flex flex-col">
                  <label className="text-xs font-semibold text-gray-700 mb-1.5">Tipo de operación</label>
                  <select
                    value={tipoOperacionFilter}
                    onChange={e => setTipoOperacionFilter(e.target.value)}
                    className="w-full border border-gray-300 rounded-xl px-3 py-2.5 text-sm focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-blue-500 bg-white shadow-sm transition-all duration-200 hover:shadow-md"
                  >
                    <option value="">Todos</option>
                    <option value="1">Importación</option>
                    <option value="2">Exportación</option>
                  </select>
                </div>
                {/* Clave pedimento */}
                <div className="flex flex-col">
                  <label className="text-xs font-semibold text-gray-700 mb-1.5">Clave pedimento</label>
                  <input
                    type="text"
                    value={clavePedimentoFilter}
                    onChange={e => setClavePedimentoFilter(e.target.value)}
                    placeholder="Clave pedimento..."
                    className="w-full border border-gray-300 rounded-xl px-3 py-2.5 text-sm focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-blue-500 bg-white shadow-sm transition-all duration-200 hover:shadow-md"
                  />
                </div>
              </div>
            </div>

            {/* Área de acciones para documentos seleccionados */}
            {selectedDocuments.length > 0 && (
              <div className="mb-4 overflow-hidden border border-blue-200 bg-gradient-to-r from-blue-50 to-indigo-50 rounded-2xl">
                <div className="px-6 py-4 border-b border-blue-200">
                  <div className="flex items-center justify-between">
                    <div className="flex items-center gap-3">
                      <div className="p-2 bg-blue-100 rounded-full">
                        <svg className="w-5 h-5 text-blue-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                          <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M9 12l2 2 4-4m6 2a9 9 0 11-18 0 9 9 0 0118 0z" />
                        </svg>
                      </div>
                      <div>
                        <h3 className="text-lg font-semibold text-gray-900">
                          {selectedDocuments.length} documento{selectedDocuments.length !== 1 ? 's' : ''} seleccionado{selectedDocuments.length !== 1 ? 's' : ''}
                        </h3>
                        <p className="text-sm text-gray-600">Selecciona una acción para continuar</p>
                      </div>
                    </div>
                    <button
                      onClick={() => {
                        setSelectedDocuments([]);
                        setIsSelectAll(false);
                      }}
                      className="text-gray-400 transition-colors hover:text-gray-600"
                      title="Limpiar selección"
                    >
                      <svg className="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M6 18L18 6M6 6l12 12" />
                      </svg>
                    </button>
                  </div>
                </div>
                <div className="px-6 py-4">
                  <div className="flex flex-wrap gap-3">
                    <button
                      onClick={handleDeleteSelected}
                      className="inline-flex items-center px-4 py-2 font-medium text-white transition-colors duration-200 bg-red-600 rounded-lg shadow-sm hover:bg-red-700 hover:shadow-md"
                    >
                      <svg className="w-5 h-5 mr-2" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M19 7l-.867 12.142A2 2 0 0116.138 21H7.862a2 2 0 01-1.995-1.858L5 7m5 4v6m4-6v6m1-10V4a1 1 0 00-1-1h-4a1 1 0 00-1 1v3M4 7h16" />
                      </svg>
                      Eliminar seleccionados
                    </button>
                  </div>
                </div>
              </div>
            )}

            <div className="flex flex-col items-start justify-between gap-4 sm:flex-row sm:items-center">
              <div className="flex items-center gap-3">
                <span className="inline-flex items-center px-3 py-2 text-xs font-medium text-blue-600 rounded-full bg-blue-50">
                  <svg className="w-4 h-4 mr-2 animate-pulse" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M4 4v5h.582m15.356 2A8.001 8.001 0 004.582 9m0 0H9m11 11v-5h-.581m0 0a8.003 8.003 0 01-15.357-2m15.357 2H15" />
                  </svg>
                  Actualización automática cada 30s
                </span>
                {loading && (
                  <span className="inline-flex items-center px-3 py-2 text-xs font-medium text-orange-600 rounded-full bg-orange-50">
                    <svg className="w-4 h-4 mr-2 animate-spin" fill="none" viewBox="0 0 24 24">
                      <circle className="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" strokeWidth="4"></circle>
                      <path className="opacity-75" fill="currentColor" d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4zm2 5.291A7.962 7.962 0 014 12H0c0 3.042 1.135 5.824 3 7.938l3-2.647z"></path>
                    </svg>
                    Actualizando...
                  </span>
                )}
              </div>
              <div className="flex items-center gap-2">
                <button
                  onClick={() => {
                    setShowUploadModal(true);
                    fetchImportadores();
                  }}
                  className="inline-flex items-center px-4 py-2.5 border border-transparent text-sm font-medium rounded-xl text-white bg-gradient-to-r from-green-600 to-green-700 hover:from-green-700 hover:to-green-800 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-green-500 transition-all duration-200 transform hover:scale-105 shadow-lg"
                >
                  <svg className="w-4 h-4 mr-2" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M7 16a4 4 0 01-.88-7.903A5 5 0 1115.9 6L16 6a5 5 0 011 9.9M15 13l-3-3m0 0l-3 3m3-3v12" />
                  </svg>
                  Agregar Expedientes
                </button>
                <button 
                  onClick={refetch} 
                  disabled={loading}
                  className="inline-flex items-center px-4 py-2.5 border border-transparent text-sm font-medium rounded-xl text-white bg-gradient-to-r from-blue-600 to-blue-700 hover:from-blue-700 hover:to-blue-800 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500 transition-all duration-200 transform hover:scale-105 shadow-lg disabled:opacity-50 disabled:cursor-not-allowed disabled:transform-none"
                >
                  <svg className="w-4 h-4 mr-2" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M4 4v5h.582m15.356 2A8.001 8.001 0 004.582 9m0 0H9m11 11v-5h-.581m0 0a8.003 8.003 0 01-15.357-2m15.357 2H15" />
                  </svg>
                  Actualizar Ahora
                </button>
                <button 
                  onClick={() => {handleDownloadSelected()}}
                  className="inline-flex items-center px-4 py-2.5 border border-transparent text-sm font-medium rounded-xl text-white bg-gradient-to-r from-purple-600 to-purple-700 hover:from-purple-700 hover:to-purple-800 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-purple-500 transition-all duration-200 transform hover:scale-105 shadow-lg"
                >
                  <svg className="w-4 h-4 mr-2" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M4 16v1a3 3 0 003 3h10a3 3 0 003-3v-1m-4-4l-4 4m0 0l-4-4m4 4V4" />
                  </svg>
                  {hasActiveFilters ? 'Descargar por Filtro' : 'Descargar Todos'}
                </button>
              </div>
            </div>
            {success && (
              <div className="p-4 mt-4 border border-green-200 shadow-sm bg-gradient-to-r from-green-50 to-emerald-50 rounded-xl">
                <div className="flex">
                  <div className="flex-shrink-0">
                    <svg className="w-5 h-5 text-green-500" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                      <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M9 12l2 2 4-4m6 2a9 9 0 11-18 0 9 9 0 0118 0z"></path>
                    </svg>
                  </div>
                  <div className="ml-3">
                    <p className="text-sm font-medium text-green-800">{success}</p>
                  </div>
                </div>
              </div>
            )}
          </div>

          <div className="overflow-hidden">
            {/* Vista de tabla para pantallas grandes */}
            <div className="hidden lg:block">
              <div className="overflow-x-auto rounded-lg shadow ring-1 ring-black ring-opacity-5">
                <table className="min-w-full divide-y divide-gray-300" style={{ minWidth: '1200px' }}>
                  <thead className="bg-gray-50">
                    <tr>
                      <th scope="col" className="px-4 py-2 text-xs font-medium tracking-wider text-left text-gray-500 uppercase">
                        <input
                          type="checkbox"
                          checked={isSelectAll}
                          onChange={handleSelectAll}
                          className="w-4 h-4 text-blue-600 border-gray-300 rounded focus:ring-blue-500"
                        />
                      </th>
                      <th scope="col" className="px-4 py-2 text-xs font-medium tracking-wider text-left text-gray-500 uppercase">Pedimento</th>
                      <th scope="col" className="px-4 py-2 text-xs font-medium tracking-wider text-left text-gray-500 uppercase">Fecha Pago</th>
                      <th scope="col" className="px-4 py-2 text-xs font-medium tracking-wider text-left text-gray-500 uppercase">Contribuyente</th>
                      <th scope="col" className="px-4 py-2 text-xs font-medium tracking-wider text-left text-gray-500 uppercase">CURP Apod.</th>
                      <th scope="col" className="px-4 py-2 text-xs font-medium tracking-wider text-left text-gray-500 uppercase">Partidas</th>
                      <th scope="col" className="px-4 py-2 text-xs font-medium tracking-wider text-left text-gray-500 uppercase">F. Carga</th>
                      <th scope="col" className="px-4 py-2 text-xs font-medium tracking-wider text-left text-gray-500 uppercase">Tipo Op.</th>
                      <th scope="col" className="px-4 py-2 text-xs font-medium tracking-wider text-left text-gray-500 uppercase">Clave</th>
                      <th scope="col" className="px-4 py-2 text-xs font-medium tracking-wider text-left text-gray-500 uppercase">Archivos</th>
                      <th scope="col" className="px-4 py-2 text-xs font-medium tracking-wider text-left text-gray-500 uppercase">Peso Total</th>
                      <th scope="col" className="px-4 py-2 text-xs font-medium tracking-wider text-left text-gray-500 uppercase">Expediente</th>
                      <th scope="col" className="px-4 py-2 text-xs font-medium tracking-wider text-center text-gray-500 uppercase">Acciones</th>
                    </tr>
                  </thead>
                  <tbody className="bg-white divide-y divide-gray-200">
                    {loading ? (
                      <tr>
                        <td colSpan={12} className="px-6 py-12 text-center">
                          <div className="flex flex-col items-center">
                            <div className="w-12 h-12 mb-4 border-b-2 border-blue-600 rounded-full animate-spin"></div>
                            <span className="text-lg font-medium text-gray-500">Cargando expedientes...</span>
                          </div>
                        </td>
                      </tr>
                    ) : error ? (
                      <tr>
                        <td colSpan={12} className="px-6 py-12 text-center">
                          <div className="flex flex-col items-center">
                            <div className="p-3 mb-4 bg-red-100 rounded-full">
                              <svg className="w-8 h-8 text-red-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M12 8v4m0 4h.01M21 12a9 9 0 11-18 0 9 9 0 0118 0z"></path>
                              </svg>
                            </div>
                            <span className="text-lg font-medium text-red-600">Error: {error.message || 'Error al cargar expedientes'}</span>
                          </div>
                        </td>
                      </tr>
                    ) : currentDocuments.length > 0 ? (
                      currentDocuments.map(ped => (
                        <tr key={ped.id} className="hover:bg-gray-50">
                          <td className="px-4 py-3 whitespace-nowrap">
                            <input
                              type="checkbox"
                              checked={selectedDocuments.includes(ped.id)}
                              onChange={(e) => handleSelectDocument(ped.id, e.target.checked)}
                              className="w-4 h-4 text-blue-600 border-gray-300 rounded focus:ring-blue-500"
                            />
                          </td>
                          <td className="px-4 py-3 whitespace-nowrap">
                            <Link 
                              to={`/expedientes/pedimento/${ped.id}`}
                              className="text-xs font-semibold text-blue-600 transition-colors duration-200 hover:text-blue-800"
                            >
                              {ped.pedimento_app}
                            </Link>
                          </td>
                          <td className="px-4 py-3 text-xs text-gray-900 whitespace-nowrap">{ped.fecha_pago}</td>
                          <td className="max-w-xs px-4 py-3 text-xs text-gray-900 truncate" title={ped.contribuyente}>{ped.contribuyente}</td>
                          <td className="px-4 py-3 text-xs text-gray-900 whitespace-nowrap">{ped.curp_apoderado}</td>
                          <td className="px-4 py-3 text-xs text-gray-900 whitespace-nowrap">{ped.numero_partidas}</td>
                          <td className="px-4 py-3 text-xs text-gray-900 whitespace-nowrap">{ped.created_at ? ped.created_at.slice(0, 10) : ''}</td>
                          <td className="px-4 py-3 whitespace-nowrap">
                            <span className="inline-flex items-center px-2 py-0.5 rounded-full text-xs font-medium bg-blue-100 text-blue-800">
                              {ped.tipo_operacion === 1
                                ? 'Import.'
                                : ped.tipo_operacion === 2
                                  ? 'Export.'
                                  : ped.tipo_operacion}
                            </span>
                          </td>
                          <td className="px-4 py-3 text-xs text-gray-900 whitespace-nowrap">{ped.clave_pedimento}</td>
                          <td className="px-4 py-3 text-xs text-gray-900 whitespace-nowrap">{ped.documentos_count || 0}</td>
                          <td className="min-w-0 px-4 py-3 text-xs text-gray-900 whitespace-nowrap">
                            <div className="truncate" title={typeof ped.documentos_peso_total === 'number' ? (ped.documentos_peso_total / (1024 * 1024)).toFixed(2) + ' MB' : ped.documentos_peso_total}>
                              {typeof ped.documentos_peso_total === 'number'
                                ? (ped.documentos_peso_total / (1024 * 1024)).toFixed(2) + ' MB'
                                : ped.documentos_peso_total || 'N/A'}
                            </div>
                          </td>
                          <td className="px-4 py-3 whitespace-nowrap">
                            <span className={`inline-flex items-center px-3 py-1 rounded-full text-xs font-semibold ${
                              ped.existe_expediente 
                                ? 'bg-green-100 text-green-800 border border-green-200' 
                                : 'bg-gray-100 text-gray-600 border border-gray-200'
                            }`}>
                              {ped.existe_expediente ? (
                                <>
                                  <svg className="w-3 h-3 mr-1" fill="currentColor" viewBox="0 0 20 20">
                                    <path fillRule="evenodd" d="M16.707 5.293a1 1 0 010 1.414l-8 8a1 1 0 01-1.414 0l-4-4a1 1 0 011.414-1.414L8 12.586l7.293-7.293a1 1 0 011.414 0z" clipRule="evenodd" />
                                  </svg>
                                  Sí
                                </>
                              ) : (
                                <>
                                  <svg className="w-3 h-3 mr-1" fill="currentColor" viewBox="0 0 20 20">
                                    <path fillRule="evenodd" d="M4.293 4.293a1 1 0 011.414 0L10 8.586l4.293-4.293a1 1 0 111.414 1.414L11.414 10l4.293 4.293a1 1 0 01-1.414 1.414L10 11.414l-4.293 4.293a1 1 0 01-1.414-1.414L8.586 10 4.293 5.707a1 1 0 010-1.414z" clipRule="evenodd" />
                                  </svg>
                                  No
                                </>
                              )}
                            </span>
                          </td>
                          <td className="px-4 py-3 text-center whitespace-nowrap">
                            <button
                              className="p-2 text-blue-600 transition-colors duration-200 rounded-full hover:text-blue-800 hover:bg-blue-50 focus:outline-none focus:ring-2 focus:ring-blue-500 focus:ring-offset-2"
                              onClick={() => handleDownloadTodoElExpediente(ped.id, ped.pedimento_app)}
                              title="Descargar"
                            >
                              <svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M4 16v1a3 3 0 003 3h10a3 3 0 003-3v-1m-4-4l-4 4m0 0l-4-4m4 4V4" />
                              </svg>
                            </button>
                          </td>
                        </tr>
                      ))
                    ) : (
                      <tr>
                        <td colSpan={12} className="px-6 py-12 text-center">
                          <div className="flex flex-col items-center">
                            <div className="p-4 mb-4 bg-gray-100 rounded-full">
                              <svg className="w-8 h-8 text-gray-400" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M9 12h6m-6 4h6m2 5H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z" />
                              </svg>
                            </div>
                            <h3 className="mb-2 text-lg font-semibold text-gray-900">No hay expedientes</h3>
                            <p className="text-gray-500">No se encontraron expedientes con los filtros aplicados.</p>
                          </div>
                        </td>
                      </tr>
                    )}
                  </tbody>
                </table>
              </div>
            </div>

            {/* Vista de tarjetas para pantallas pequeñas y medianas */}
            <div className="p-4 space-y-4 lg:hidden">
              {loading ? (
                <div className="flex flex-col items-center py-12">
                  <div className="w-12 h-12 mb-4 border-b-2 border-blue-600 rounded-full animate-spin"></div>
                  <span className="text-lg font-medium text-gray-500">Cargando expedientes...</span>
                </div>
              ) : error ? (
                <div className="flex flex-col items-center py-12">
                  <div className="p-3 mb-4 bg-red-100 rounded-full">
                    <svg className="w-8 h-8 text-red-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                      <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M12 8v4m0 4h.01M21 12a9 9 0 11-18 0 9 9 0 0118 0z"></path>
                    </svg>
                  </div>
                  <span className="text-lg font-medium text-red-600">Error: {error.message || 'Error al cargar expedientes'}</span>
                </div>
              ) : currentDocuments.length > 0 ? (
                currentDocuments.map(ped => (
                  <div key={ped.id} className="relative p-4 transition-all duration-300 bg-white border border-gray-200 shadow-lg rounded-2xl hover:shadow-xl">
                    {/* Checkbox en la esquina superior derecha */}
                    <div className="absolute top-4 right-4">
                      <input
                        type="checkbox"
                        checked={selectedDocuments.includes(ped.id)}
                        onChange={(e) => handleSelectDocument(ped.id, e.target.checked)}
                        className="w-5 h-5 text-blue-600 border-gray-300 rounded focus:ring-blue-500"
                      />
                    </div>
                    
                    <div className="flex items-start justify-between pr-8 mb-4">{/* Agregamos pr-8 para dar espacio al checkbox */}
                      <div className="flex items-center gap-3">
                        <div className="flex-shrink-0 p-2 bg-blue-100 rounded-xl">
                          <svg className="w-5 h-5 text-blue-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                            <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M9 12h6m-6 4h6m2 5H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z" />
                          </svg>
                        </div>
                        <div className="flex-1">
                          <Link 
                            to={`/expedientes/pedimento/${ped.id}`}
                            className="text-lg font-semibold text-blue-600 transition-colors duration-200 hover:text-blue-800"
                          >
                            {ped.pedimento_app}
                          </Link>
                          <p className="text-sm text-gray-500">{ped.fechapago}</p>
                          <span className={`inline-flex items-center px-2.5 py-1 rounded-full text-xs font-semibold mt-1 ${
                            ped.existe_expediente 
                              ? 'bg-green-100 text-green-800 border border-green-200' 
                              : 'bg-gray-100 text-gray-600 border border-gray-200'
                          }`}>
                            {ped.existe_expediente ? 'Con expediente' : 'Sin expediente'}
                          </span>
                        </div>
                      </div>
                    </div>
                    
                    <div className="mb-4 space-y-3">
                      <div className="flex items-center justify-between">
                        <span className="text-sm font-medium text-gray-600">Contribuyente:</span>
                        <span className="text-sm text-gray-900 text-right max-w-[60%] truncate" title={ped.contribuyente}>
                          {ped.contribuyente}
                        </span>
                      </div>
                      {ped.curp_apoderado && (
                        <div className="flex items-center justify-between">
                          <span className="text-sm font-medium text-gray-600">CURP Apoderado:</span>
                          <span className="text-sm text-gray-900">{ped.curp_apoderado}</span>
                        </div>
                      )}
                      <div className="grid grid-cols-1 gap-2">
                        <div className="flex items-center justify-between p-2 rounded-lg bg-green-50">
                          <span className="text-sm font-medium text-green-700">Tipo Operacion</span>
                          <span className="text-sm font-bold text-green-800">{ped.tipo_operacion}</span>
                        </div>
                        <div className="flex items-center justify-between p-2 rounded-lg bg-green-50">
                          <span className="text-sm font-medium text-green-700">Partidas</span>
                          <span className="text-sm font-bold text-green-800">{ped.numero_partidas}</span>
                        </div>
                        <div className="flex items-center justify-between p-2 rounded-lg bg-blue-50">
                          <span className="text-sm font-medium text-blue-700">Fecha de Carga</span>
                          <span className="text-sm font-bold text-blue-800">{ped.created_at ? ped.created_at.slice(0, 10) : ''}</span>
                        </div>
                        <div className="flex items-center justify-between p-2 rounded-lg bg-gray-50">
                          <span className="text-sm font-medium text-gray-700">Clave</span>
                          <span className="text-sm font-bold text-gray-800">{ped.clave_pedimento}</span>
                        </div>
                        <div className="flex items-center justify-between p-2 rounded-lg bg-gray-50">
                          <span className="text-sm font-medium text-gray-700">No. Archivos</span>
                          <span className="text-sm font-bold text-gray-800">{ped.documentos_count || 0}</span>
                        </div>
                        <div className="flex items-center justify-between p-2 rounded-lg bg-gray-50">
                          <span className="text-sm font-medium text-gray-700">Peso Total</span>
                          <span className="text-sm font-bold text-gray-800">
                            {typeof ped.documentos_peso_total === 'number'
                              ? (ped.documentos_peso_total / (1024 * 1024)).toFixed(2) + ' MB'
                              : ped.documentos_peso_total || 'N/A'}
                          </span>
                        </div>
                      </div>
                    </div>
                  </div>
                ))
              ) : (
                <div className="p-8 text-center bg-gray-50 rounded-2xl">
                  <div className="flex items-center justify-center w-16 h-16 p-4 mx-auto mb-4 bg-gray-100 rounded-full">
                    <svg className="w-8 h-8 text-gray-400" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                      <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M9 12h6m-6 4h6m2 5H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z" />
                    </svg>
                  </div>
                  <p className="font-medium text-gray-500">No hay expedientes disponibles</p>
                  <p className="mt-1 text-sm text-gray-400">Intenta ajustar los filtros de búsqueda</p>
                </div>
              )}
            </div>
            {/* Paginación moderna y responsiva */}
            {totalDocuments > 0 && (
              <div className="flex flex-col items-center justify-between px-4 py-4 border-t border-gray-200 bg-gradient-to-r from-gray-50 to-blue-50/30 sm:px-6 sm:flex-row">
                {(() => {
                  const totalPages = Math.max(1, Math.ceil(totalDocuments / itemsPerPage));
                  const maxPagesToShow = 5;
                  let startPage = Math.max(1, currentPage - Math.floor(maxPagesToShow / 2));
                  let endPage = startPage + maxPagesToShow - 1;
                  if (endPage > totalPages) {
                    endPage = totalPages;
                    startPage = Math.max(1, endPage - maxPagesToShow + 1);
                  }
                  const pageNumbers = [];
                  for (let i = startPage; i <= endPage; i++) {
                    pageNumbers.push(i);
                  }
                  return (
                    <div className="flex flex-col w-full gap-4 sm:flex-row sm:items-center">
                      <div className="flex items-center gap-3">
                        <label htmlFor="itemsPerPage" className="text-xs font-semibold text-gray-700">Registros por página:</label>
                        <select
                          id="itemsPerPage"
                          value={itemsPerPage}
                          onChange={e => handleItemsPerPageChange(Number(e.target.value))}
                          className="px-3 py-2 text-sm bg-white border border-gray-300 rounded-lg shadow-sm focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-blue-500"
                        >
                          {[5, 10, 20, 50, 100, 200, 400, 800, 1200, 2400, 10000].map(size => (
                            <option key={size} value={size}>{size}</option>
                          ))}
                        </select>
                      </div>
                      <div className="flex items-center justify-center flex-1 gap-1 sm:justify-end">
                        <button
                          type="button"
                          onClick={e => handlePageChange(1, e)}
                          disabled={currentPage === 1}
                          className={`px-3 py-2 rounded-lg border text-sm font-semibold transition-all duration-200 ${currentPage === 1 ? 'bg-gray-100 text-gray-400 border-gray-200 cursor-not-allowed' : 'bg-white text-blue-700 border-blue-200 hover:bg-blue-50 hover:text-blue-900 shadow-sm hover:shadow-md'}`}
                        >
                          «
                        </button>
                        <button
                          type="button"
                          onClick={e => handlePageChange(currentPage - 1, e)}
                          disabled={currentPage === 1}
                          className={`px-3 py-2 rounded-lg border text-sm font-semibold transition-all duration-200 ${currentPage === 1 ? 'bg-gray-100 text-gray-400 border-gray-200 cursor-not-allowed' : 'bg-white text-blue-700 border-blue-200 hover:bg-blue-50 hover:text-blue-900 shadow-sm hover:shadow-md'}`}
                        >
                          ‹
                        </button>
                        <div className="items-center hidden gap-1 sm:flex">
                          {pageNumbers.map(num => (
                            <button
                              type="button"
                              key={num}
                              onClick={e => handlePageChange(num, e)}
                              className={`px-3 py-2 rounded-lg border text-sm font-semibold transition-all duration-200 ${num === currentPage ? 'bg-blue-600 text-white border-blue-700 shadow-md cursor-default' : 'bg-white text-blue-700 border-blue-200 hover:bg-blue-50 hover:text-blue-900 shadow-sm hover:shadow-md'}`}
                              disabled={num === currentPage}
                            >
                              {num}
                            </button>
                          ))}
                        </div>
                        <div className="flex items-center px-3 py-2 bg-white border border-gray-200 rounded-lg shadow-sm sm:hidden">
                          <span className="text-sm font-semibold text-gray-700">
                            {currentPage} / {totalPages}
                          </span>
                        </div>
                        <button
                          type="button"
                          onClick={e => handlePageChange(currentPage + 1, e)}
                          disabled={currentPage >= totalPages}
                          className={`px-3 py-2 rounded-lg border text-sm font-semibold transition-all duration-200 ${(currentPage >= totalPages) ? 'bg-gray-100 text-gray-400 border-gray-200 cursor-not-allowed' : 'bg-white text-blue-700 border-blue-200 hover:bg-blue-50 hover:text-blue-900 shadow-sm hover:shadow-md'}`}
                        >
                          ›
                        </button>
                        <button
                          type="button"
                          onClick={e => handlePageChange(totalPages, e)}
                          disabled={currentPage >= totalPages}
                          className={`px-3 py-2 rounded-lg border text-sm font-semibold transition-all duration-200 ${(currentPage >= totalPages) ? 'bg-gray-100 text-gray-400 border-gray-200 cursor-not-allowed' : 'bg-white text-blue-700 border-blue-200 hover:bg-blue-50 hover:text-blue-900 shadow-sm hover:shadow-md'}`}
                        >
                          »
                        </button>
                      </div>
                      <div className="text-center sm:text-right">
                        <span className="px-3 py-2 text-xs text-gray-600 bg-white border border-gray-200 rounded-lg shadow-sm">
                          Mostrando <span className="font-bold text-blue-600">{((currentPage - 1) * itemsPerPage) + 1}</span> a <span className="font-bold text-blue-600">{Math.min(currentPage * itemsPerPage, totalDocuments)}</span> de <span className="font-bold text-blue-600">{totalDocuments}</span> registros
                        </span>
                      </div>
                    </div>
                  );
                })()}
              </div>
            )}
          </div>
        </div>

        {/* Modal de subida de expedientes */}
        {showUploadModal && (
          <div className="fixed inset-0 z-50 flex items-center justify-center p-4 bg-black bg-opacity-50">
            <div className="bg-white rounded-2xl shadow-2xl max-w-lg w-full mx-4 transform transition-all duration-300 scale-100 max-h-[90vh] flex flex-col">
              {/* Header del modal */}
              <div className="flex-shrink-0 px-6 py-4 border-b border-gray-200">
                <div className="flex items-center justify-between">
                  <div className="flex items-center gap-3">
                    <div className="p-3 bg-blue-100 rounded-full">
                      <svg className="w-6 h-6 text-blue-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M7 16a4 4 0 01-.88-7.903A5 5 0 1115.9 6L16 6a5 5 0 011 9.9M15 13l-3-3m0 0l-3 3m3-3v12" />
                      </svg>
                    </div>
                    <div>
                      <h3 className="text-lg font-semibold text-gray-900">Subir Expedientes</h3>
                      <p className="text-sm text-gray-600">Selecciona archivos, carpetas o ZIP</p>
                    </div>
                  </div>
                  <button
                    onClick={() => {
                      setShowUploadModal(false);
                      setSelectedFiles([]);
                      setUploadProgress(0);
                      setIsUploading(false);
                      setValidationErrors([]);
                    }}
                    className="text-gray-400 transition-colors duration-200 hover:text-gray-600"
                  >
                    <svg className="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                      <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M6 18L18 6M6 6l12 12" />
                    </svg>
                  </button>
                </div>
              </div>

              {/* Contenido del modal - con scroll */}
              <div className="flex-1 min-h-0 px-6 py-4 overflow-y-auto">
                {/* Selector de tipo de subida */}
                <div className="mb-4">
                  <label className="block mb-2 text-sm font-medium text-gray-700">
                    Tipo de subida
                  </label>
                  <div className="grid grid-cols-3 gap-2">
                    <button
                      onClick={() => setUploadType('folders')}
                      className={`p-3 rounded-lg border text-sm font-medium transition-all duration-200 ${
                        uploadType === 'folders'
                          ? 'border-blue-500 bg-blue-50 text-blue-700'
                          : 'border-gray-300 bg-white text-gray-700 hover:border-gray-400'
                      }`}
                    >
                      <svg className="w-5 h-5 mx-auto mb-1" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M3 7v10a2 2 0 002 2h14a2 2 0 002-2V9a2 2 0 00-2-2h-6l-2-2H5a2 2 0 00-2 2z" />
                      </svg>
                      Carpeta
                    </button>
                    <button
                      onClick={() => setUploadType('zip')}
                      className={`p-3 rounded-lg border text-sm font-medium transition-all duration-200 ${
                        uploadType === 'zip'
                          ? 'border-blue-500 bg-blue-50 text-blue-700'
                          : 'border-gray-300 bg-white text-gray-700 hover:border-gray-400'
                      }`}
                    >
                      <svg className="w-5 h-5 mx-auto mb-1" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M7 16a4 4 0 01-.88-7.903A5 5 0 1115.9 6L16 6a5 5 0 011 9.9M9 12l2 2 4-4" />
                      </svg>
                      ZIP
                    </button>
                    <button
                      onClick={() => setUploadType('rar')}
                      className={`p-3 rounded-lg border text-sm font-medium transition-all duration-200 ${
                        uploadType === 'rar'
                          ? 'border-blue-500 bg-blue-50 text-blue-700'
                          : 'border-gray-300 bg-white text-gray-700 hover:border-gray-400'
                      }`}
                    >
                      <svg className="w-5 h-5 mx-auto mb-1" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M7 16a4 4 0 01-.88-7.903A5 5 0 1115.9 6L16 6a5 5 0 011 9.9M15 13l-3-3m0 0l-3 3m3-3v12" />
                      </svg>
                      RAR
                    </button>
                  </div>
                </div>

                {/* Área de selección de archivos */}
                <div className="mb-4">
                  <label className="block mb-2 text-sm font-medium text-gray-700">
                    {uploadType === 'folders' && 'Seleccionar carpetas'}
                    {uploadType === 'zip' && 'Seleccionar archivos ZIP'}
                    {uploadType === 'rar' && 'Seleccionar archivos RAR'}
                  </label>
                  
                  {uploadType === 'folders' ? (
                    <div className="space-y-3">
                      <div className="p-6 text-center transition-colors duration-200 border-2 border-gray-300 border-dashed rounded-lg hover:border-gray-400">
                        <svg className="w-12 h-12 mx-auto mb-4 text-gray-400" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                          <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M3 7v10a2 2 0 002 2h14a2 2 0 002-2V9a2 2 0 00-2-2h-6l-2-2H5a2 2 0 00-2 2z" />
                        </svg>
                        <p className="mb-3 text-sm text-gray-600">
                          Selecciona una carpeta. Después puedes hacer clic nuevamente para agregar más carpetas.
                        </p>
                        <input
                          type="file"
                          ref={fileInputRef}
                          onChange={handleFileSelection}
                          multiple
                          webkitdirectory="true"
                          className="hidden"
                        />
                        <button
                          onClick={() => fileInputRef.current?.click()}
                          className="inline-flex items-center px-4 py-2 text-sm font-medium text-white transition-colors duration-200 bg-blue-600 border border-transparent rounded-md hover:bg-blue-700"
                        >
                          <svg className="w-4 h-4 mr-2" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                            <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M12 6v6m0 0v6m0-6h6m-6 0H6" />
                          </svg>
                          Agregar Carpeta
                          {selectedFiles.length > 0 && (
                            <span className="px-2 py-1 ml-2 text-xs text-white bg-blue-500 rounded-full">
                              {[...new Set(selectedFiles.map(file => file.webkitRelativePath.split('/')[0]))].length}
                            </span>
                          )}
                        </button>
                      </div>
                      
                      {/* Lista de carpetas seleccionadas - con altura máxima y scroll */}
                      {selectedFiles.length > 0 && (
                        <div className="p-4 border border-gray-200 rounded-lg bg-gray-50">
                          <h4 className="mb-2 text-sm font-medium text-gray-700">Carpetas seleccionadas:</h4>
                          <div className="space-y-2 overflow-y-auto max-h-40">
                            {[...new Set(selectedFiles.map(file => file.webkitRelativePath.split('/')[0]))].map((folderName, index) => (
                              <div key={index} className="flex items-center justify-between p-3 bg-white border rounded">
                                <div className="flex items-center">
                                  <svg className="w-4 h-4 mr-2 text-blue-500" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                                    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M3 7v10a2 2 0 002 2h14a2 2 0 002-2V9a2 2 0 00-2-2h-6l-2-2H5a2 2 0 00-2 2z" />
                                  </svg>
                                  <span className="text-sm font-medium">{folderName}</span>
                                </div>
                                <div className="flex items-center gap-2">
                                  <span className="text-xs text-gray-500">
                                    {selectedFiles.filter(file => file.webkitRelativePath.startsWith(folderName + '/')).length} archivos
                                  </span>
                                  <button
                                    onClick={() => removeFolderFromSelection(folderName)}
                                    className="p-1 text-red-500 hover:text-red-700"
                                    title="Eliminar carpeta"
                                  >
                                    <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                                      <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M6 18L18 6M6 6l12 12" />
                                    </svg>
                                  </button>
                                </div>
                              </div>
                            ))}
                          </div>
                          <button
                            onClick={() => setSelectedFiles([])}
                            className="mt-3 text-sm text-red-600 hover:text-red-800"
                          >
                            Limpiar todas las carpetas
                          </button>
                        </div>
                      )}
                    </div>
                  ) : (
                    <div className="space-y-3">
                      <div className="p-6 text-center transition-colors duration-200 border-2 border-gray-300 border-dashed rounded-lg hover:border-gray-400">
                        <svg className="w-12 h-12 mx-auto mb-4 text-gray-400" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                          <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M7 16a4 4 0 01-.88-7.903A5 5 0 1115.9 6L16 6a5 5 0 011 9.9M15 13l-3-3m0 0l-3 3m3-3v12" />
                        </svg>
                        <p className="mb-3 text-sm text-gray-600">
                          {uploadType === 'zip' && 'Selecciona archivos ZIP. Puedes hacer clic nuevamente para agregar más archivos.'}
                          {uploadType === 'rar' && 'Selecciona archivos RAR. Puedes hacer clic nuevamente para agregar más archivos.'}
                        </p>
                        <input
                          type="file"
                          ref={fileInputRef}
                          onChange={handleFileSelection}
                          accept={uploadType === 'zip' ? '.zip' : '.rar'}
                          multiple
                          className="hidden"
                        />
                        <button
                          onClick={() => fileInputRef.current?.click()}
                          className="inline-flex items-center px-4 py-2 text-sm font-medium text-white transition-colors duration-200 bg-blue-600 border border-transparent rounded-md hover:bg-blue-700"
                        >
                          <svg className="w-4 h-4 mr-2" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                            <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M12 6v6m0 0v6m0-6h6m-6 0H6" />
                          </svg>
                          Agregar {uploadType === 'zip' ? 'ZIP' : 'RAR'}
                          {selectedFiles.length > 0 && (
                            <span className="px-2 py-1 ml-2 text-xs text-white bg-blue-500 rounded-full">
                              {selectedFiles.length}
                            </span>
                          )}
                        </button>
                      </div>
                      
                      {/* Lista de archivos seleccionados */}
                      {selectedFiles.length > 0 && (
                        <div className="p-4 border border-gray-200 rounded-lg bg-gray-50">
                          <h4 className="mb-2 text-sm font-medium text-gray-700">Archivos seleccionados:</h4>
                          <div className="space-y-2 overflow-y-auto max-h-40">
                            {selectedFiles.map((file, index) => (
                              <div key={index} className="flex items-center justify-between p-3 bg-white border rounded">
                                <div className="flex items-center">
                                  <svg className="w-4 h-4 mr-2 text-blue-500" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                                    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M9 12h6m-6 4h6m2 5H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z" />
                                  </svg>
                                  <span className="text-sm font-medium">{file.name}</span>
                                </div>
                                <div className="flex items-center gap-2">
                                  <span className="text-xs text-gray-500">
                                    {(file.size / 1024 / 1024).toFixed(2)} MB
                                  </span>
                                  <button
                                    onClick={() => removeFileFromSelection(index)}
                                    className="p-1 text-red-500 hover:text-red-700"
                                    title="Eliminar archivo"
                                  >
                                    <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                                      <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M6 18L18 6M6 6l12 12" />
                                    </svg>
                                  </button>
                                </div>
                              </div>
                            ))}
                          </div>
                          <button
                            onClick={() => setSelectedFiles([])}
                            className="mt-3 text-sm text-red-600 hover:text-red-800"
                          >
                            Limpiar todos los archivos
                          </button>
                        </div>
                      )}
                    </div>
                  )}
                </div>

                {/* Selector de contribuyente */}
                <div className="mb-4">
                  <label className="block mb-2 text-sm font-medium text-gray-700">
                    Contribuyente
                  </label>
                  <select
                    value={selectedContributor}
                    onChange={(e) => setSelectedContributor(e.target.value)}
                    className="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-transparent"
                    disabled={loadingContributors}
                  >
                    <option value="">Seleccionar contribuyente</option>
                    {importadores.map((imp) => (
                      <option key={imp.rfc} value={imp.rfc}>
                        {imp.rfc}
                      </option>
                    ))}
                  </select>
                  {loadingContributors && (
                    <p className="mt-1 text-sm text-gray-500">Cargando contribuyentes...</p>
                  )}
                </div>

                {/* Errores de validación */}
                {validationErrors.length > 0 && (
                  <div className="p-3 mb-4 border border-red-200 rounded-md bg-red-50">
                    <div className="flex items-center gap-2 mb-2">
                      <svg className="w-5 h-5 text-red-500" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M12 8v4m0 4h.01M21 12a9 9 0 11-18 0 9 9 0 0118 0z" />
                      </svg>
                      <span className="text-sm font-medium text-red-800">Errores de validación:</span>
                    </div>
                    <ul className="space-y-1 text-sm text-red-700">
                      {validationErrors.map((error, index) => (
                        <li key={index}>• {error}</li>
                      ))}
                    </ul>
                  </div>
                )}

                {/* Información de nomenclatura */}
                {uploadType === 'folders' && (
                  <div className="p-3 mb-4 border border-blue-200 rounded-md bg-blue-50">
                    <div className="flex items-center gap-2 mb-2">
                      <svg className="w-5 h-5 text-blue-500" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M13 16h-1v-4h-1m1-4h.01M21 12a9 9 0 11-18 0 9 9 0 0118 0z" />
                      </svg>
                      <span className="text-sm font-medium text-blue-800">Nomenclatura de carpetas:</span>
                    </div>
                    <p className="text-sm text-blue-700">
                      Las carpetas deben seguir el formato: <strong>[AÑO]-ADUANA-PATENTE-PEDIMENTO</strong>
                      <br />
                      • AÑO: 2 dígitos (opcional, ej: 24-)
                      <br />
                      • ADUANA: 2 o 3 dígitos (ej: 01, 001)
                      <br />
                      • PATENTE: 4 dígitos (ej: 3206)
                      <br />
                      • PEDIMENTO: 7 dígitos (ej: 1234567)
                      <br />
                      <strong>Ejemplos válidos:</strong> <em>24-01-3206-1234567</em>, <em>001-3206-1234567</em>
                    </p>
                  </div>
                )}

                {/* Barras de progreso */}
                {isCompressing && (
                  <div className="mb-4">
                    <div className="flex items-center justify-between mb-2">
                      <span className="text-sm font-medium text-gray-700">Comprimiendo carpetas...</span>
                      <span className="text-sm text-gray-500">{compressionProgress}%</span>
                    </div>
                    <div className="w-full h-2 bg-gray-200 rounded-full">
                      <div
                        className="h-2 transition-all duration-300 bg-green-600 rounded-full"
                        style={{ width: `${compressionProgress}%` }}
                      ></div>
                    </div>
                  </div>
                )}
                
                {isUploading && (
                  <div className="mb-4">
                    <div className="flex items-center justify-between mb-2">
                      <span className="text-sm font-medium text-gray-700">Subiendo...</span>
                      <span className="text-sm text-gray-500">{uploadProgress}%</span>
                    </div>
                    <div className="w-full h-2 bg-gray-200 rounded-full">
                      <div
                        className="h-2 transition-all duration-300 bg-blue-600 rounded-full"
                        style={{ width: `${uploadProgress}%` }}
                      ></div>
                    </div>
                  </div>
                )}
              </div>

              {/* Footer del modal - fijo */}
              <div className="flex justify-end flex-shrink-0 gap-3 px-6 py-4 border-t border-gray-200">
                <button
                  onClick={() => {
                    setShowUploadModal(false);
                    setSelectedFiles([]);
                    setUploadProgress(0);
                    setCompressionProgress(0);
                    setIsUploading(false);
                    setIsCompressing(false);
                    setValidationErrors([]);
                  }}
                  disabled={isUploading || isCompressing}
                  className="px-4 py-2 text-sm font-medium text-gray-700 transition-colors duration-200 bg-white border border-gray-300 rounded-md hover:bg-gray-50 disabled:opacity-50 disabled:cursor-not-allowed"
                >
                  Cancelar
                </button>
                <button
                  onClick={handleUploadFiles}
                  disabled={isUploading || isCompressing || selectedFiles.length === 0 || !selectedContributor || validationErrors.length > 0}
                  className="px-4 py-2 text-sm font-medium text-white transition-colors duration-200 bg-blue-600 border border-transparent rounded-md hover:bg-blue-700 disabled:opacity-50 disabled:cursor-not-allowed"
                >
                  {isCompressing ? 'Comprimiendo...' : isUploading ? 'Subiendo...' : 'Subir expedientes'}
                </button>
              </div>
            </div>
          </div>
        )}

        {/* Modal de confirmación para eliminación */}
        {showDeleteModal && (
          <div className="fixed inset-0 z-50 flex items-center justify-center p-4 bg-black bg-opacity-50">
            <div className="w-full max-w-md mx-4 transition-all duration-300 transform scale-100 bg-white shadow-2xl rounded-2xl">
              {/* Header del modal */}
              <div className="px-6 py-4 border-b border-gray-200">
                <div className="flex items-center gap-3">
                  <div className="p-3 bg-red-100 rounded-full">
                    <svg className="w-6 h-6 text-red-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                      <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M19 7l-.867 12.142A2 2 0 0116.138 21H7.862a2 2 0 01-1.995-1.858L5 7m5 4v6m4-6v6m1-10V4a1 1 0 00-1-1h-4a1 1 0 00-1 1v3M4 7h16" />
                    </svg>
                  </div>
                  <div>
                    <h3 className="text-lg font-semibold text-gray-900">
                      Confirmar eliminación
                    </h3>
                    <p className="text-sm text-gray-600">Esta acción no se puede deshacer</p>
                  </div>
                </div>
              </div>

              {/* Contenido del modal */}
              <div className="px-6 py-4">
                <div className="mb-4">
                  <p className="mb-3 text-gray-700">
                    ¿Estás seguro de que deseas eliminar{' '}
                    <span className="font-semibold text-red-600">
                      {selectedDocuments.length} documento{selectedDocuments.length !== 1 ? 's' : ''}
                    </span>
                    ?
                  </p>
                  
                  <div className="p-3 border border-red-200 rounded-lg bg-red-50">
                    <div className="flex items-start gap-2">
                      <svg className="w-5 h-5 text-red-500 mt-0.5 flex-shrink-0" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M12 9v2m0 4h.01m-6.938 4h13.856c1.54 0 2.502-1.667 1.732-2.5L13.732 4c-.77-.833-1.964-.833-2.732 0L3.732 16.5c-.77.833.192 2.5 1.732 2.5z" />
                      </svg>
                      <div>
                        <p className="text-sm font-medium text-red-800">Advertencia importante</p>
                        <p className="mt-1 text-sm text-red-700">
                          Los documentos eliminados no podrán ser recuperados. Asegúrate de que realmente deseas proceder con esta acción.
                        </p>
                      </div>
                    </div>
                  </div>
                </div>
              </div>

              {/* Botones del modal */}
              <div className="flex justify-end gap-3 px-6 py-4 border-t border-gray-200">
                <button
                  onClick={() => setShowDeleteModal(false)}
                  className="px-4 py-2 text-sm font-medium text-gray-700 transition-colors duration-200 bg-white border border-gray-300 rounded-lg hover:bg-gray-50 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500"
                >
                  Cancelar
                </button>
                <button
                  onClick={confirmDelete}
                  className="flex items-center gap-2 px-4 py-2 text-sm font-medium text-white transition-colors duration-200 bg-red-600 border border-transparent rounded-lg hover:bg-red-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-red-500"
                >
                  <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M19 7l-.867 12.142A2 2 0 0116.138 21H7.862a2 2 0 01-1.995-1.858L5 7m5 4v6m4-6v6m1-10V4a1 1 0 00-1-1h-4a1 1 0 00-1 1v3M4 7h16" />
                  </svg>
                  Eliminar {selectedDocuments.length} documento{selectedDocuments.length !== 1 ? 's' : ''}
                </button>
              </div>
            </div>
          </div>
        )}
      </div>
    </div>
  );
}