<?php
session_start();
require_once __DIR__ . '/../config/database.php';
header('Content-Type: application/json; charset=utf-8');

// Verificar que el usuario esté logueado
if (!isset($_SESSION['usuario_id'])) {
    echo json_encode(['success' => false, 'message' => 'Usuario no autenticado']);
    exit;
}

if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
    echo json_encode(['success' => false, 'message' => 'Método no permitido']);
    exit;
}

try {
    $conn = getConnection();
    
    // Iniciar transacción
    sqlsrv_begin_transaction($conn);
    
    // Eliminar en orden correcto (por las foreign keys)
    $sql1 = "DELETE FROM pedimento_partidas";
    $sql2 = "DELETE FROM pedimento_facturas"; 
    $sql3 = "DELETE FROM pedimentos";
    $sql4 = "DELETE FROM importacion_logs";
    
    $stmt1 = sqlsrv_query($conn, $sql1);
    $stmt2 = sqlsrv_query($conn, $sql2);
    $stmt3 = sqlsrv_query($conn, $sql3);
    $stmt4 = sqlsrv_query($conn, $sql4);
    
    if ($stmt1 && $stmt2 && $stmt3 && $stmt4) {
        // Resetear los IDENTITY
        sqlsrv_query($conn, "DBCC CHECKIDENT ('pedimentos', RESEED, 0)");
        sqlsrv_query($conn, "DBCC CHECKIDENT ('pedimento_facturas', RESEED, 0)");
        sqlsrv_query($conn, "DBCC CHECKIDENT ('pedimento_partidas', RESEED, 0)");
        sqlsrv_query($conn, "DBCC CHECKIDENT ('importacion_logs', RESEED, 0)");
        
        sqlsrv_commit($conn);
        
        echo json_encode([
            'success' => true,
            'message' => 'Base de datos limpiada exitosamente',
            'timestamp' => date('Y-m-d H:i:s'),
            'usuario_id' => $_SESSION['usuario_id']
        ]);
    } else {
        sqlsrv_rollback($conn);
        echo json_encode([
            'success' => false,
            'message' => 'Error al limpiar la base de datos',
            'errors' => sqlsrv_errors()
        ]);
    }
    
    sqlsrv_close($conn);
    
} catch (Exception $e) {
    echo json_encode([
        'success' => false,
        'error' => $e->getMessage()
    ]);
}
?>