<script lang="ts">
	import { onMount } from 'svelte';
	import { countriesApi, type Country } from '$lib/api/dashboard/reference_data/countries';
	import DataTable from '$lib/components/dashboard/reference_data/countries/data-table.svelte';
	import { createColumns } from '$lib/components/dashboard/reference_data/countries/columns';
	import * as Card from '$lib/components/ui/card';
	import { Button } from '$lib/components/ui/button';
	import { Input } from '$lib/components/ui/input';
	import { RefreshCw, Plus } from 'lucide-svelte';
	import { page } from '$app/stores';
	import type { PageData } from './$types';
	import { useShortcuts } from '$lib/hooks/use-shortcuts';
	import { obtenerAtajosLista } from '$lib/config/shortcuts/dashboard/reference_data/countries/list';
	import { browser } from '$app/environment';
	import { currentUser, userHasPermission } from '$lib/auth';
	import ErrorState from '$lib/components/dashboard/common/error-state.svelte';

	// Los datos iniciales vienen del servidor
	let { data }: { data: PageData } = $props();
	
	// Atajos
	useShortcuts(
		'Lista Países',
		obtenerAtajosLista({
			manejarActualizar: reloadData
		})
	);

	// Sincronizar token de cookies a localStorage al montar el componente
	onMount(() => {
		if (browser) {
			const getCookie = (name: string): string | null => {
				const value = `; ${document.cookie}`;
				const parts = value.split(`; ${name}=`);
				if (parts.length === 2) return parts.pop()?.split(';').shift() || null;
				return null;
			};

			const cookieToken = getCookie('access_token');
			const localToken = localStorage.getItem('access_token');

			if (cookieToken && cookieToken !== localToken) {
				localStorage.setItem('access_token', cookieToken);
			}

			const cookieRefreshToken = getCookie('refresh_token');
			const localRefreshToken = localStorage.getItem('refresh_token');

			if (cookieRefreshToken && cookieRefreshToken !== localRefreshToken) {
				localStorage.setItem('refresh_token', cookieRefreshToken);
			}
		}
	});

	// Estado para infinite scroll
	let allItems = $state<Country[]>(data.items || []);
	let currentPage = $state(data.page || 1);
	let pageSize = $state(50);
	let totalItems = $state(data.total || 0);
	let loading = $state(false);
	let hasMore = $derived(allItems.length < totalItems);
	let error = $state<string | null>(data.error || null);
	let status = $state<number>(data.status || 200);

	// Permisos
	const canView = $derived(userHasPermission($currentUser, 'ref_countries.view') || userHasPermission($currentUser, 'cat_countries.view'));
	const canCreate = $derived(userHasPermission($currentUser, 'ref_countries.create'));
	const canEdit = $derived(userHasPermission($currentUser, 'ref_countries.edit'));
	const canDelete = $derived(userHasPermission($currentUser, 'ref_countries.delete'));

	const isError = $derived(!canView || status >= 400 || error);

	// Filtros
	let searchQuery = $state($page.url.searchParams.get('search') || '');
	let timeout: ReturnType<typeof setTimeout>;

	function handleSearch() {
		if (!browser) return;
		clearTimeout(timeout);
		timeout = setTimeout(async () => {
			loading = true;
			error = null;
			try {
				const response = await countriesApi.list(1, pageSize, searchQuery as any);
				if (!response.error && response.data) {
					allItems = response.data.items;
					currentPage = 1;
					totalItems = response.data.total;
				}
			} catch (e) {
				console.error('Error aplicando filtros:', e);
			} finally {
				loading = false;
			}
			
			const url = new URL($page.url);
			if (searchQuery) url.searchParams.set('search', searchQuery);
			else url.searchParams.delete('search');
			
			history.replaceState(history.state, '', url);
		}, 500);
	}

	async function loadMore() {
		if (loading || !hasMore) return;

		loading = true;
		error = null;

		try {			
			const response = await countriesApi.list(currentPage + 1, pageSize, searchQuery as any);
			if (response.error) {
				console.error('📊 [Page] Error en loadMore:', response.error, 'Status:', response.status);
				if (response.status === 401 || response.status === 403) {
					error = 'Sesión expirada. Recargando página...';
					setTimeout(() => {
						window.location.reload();
					}, 2000);
				} else {
					error = response.error;
				}
				return;
			}

			if (response.data?.items) {				
				allItems = [...allItems, ...response.data.items];
				currentPage++;
				totalItems = response.data.total;
			}
		} catch (e) {
			error = 'Error cargando más datos';
			console.error('📊 [Page] Error loading more:', e);
		} finally {
			loading = false;
		}
	}

	function reloadData() {
		if (browser) window.location.reload();
	}

	function handleSuccess() {
		reloadData();
	}

	// Crear columnas con el callback onSuccess y permisos
	const columns = $derived(createColumns(handleSuccess, { canEdit, canDelete }));
</script>

<div class="flex flex-col gap-6 p-6 h-[calc(100svh-4rem)] group-has-data-[collapsible=icon]/sidebar-wrapper:h-[calc(100svh-3rem)] overflow-hidden">
	{#if isError}
		<ErrorState 
			status={!canView ? 403 : status} 
			error={!canView ? 'Permission denied: ref_countries.view' : (error || '')} 
			onRetry={reloadData} 
		/>
	{:else}
		<!-- Header Section -->
		<div class="flex-none flex items-center justify-between">
			<div class="space-y-1">
				<h1 class="text-2xl font-bold tracking-tight">
					Países
				</h1>
				<p class="text-muted-foreground">
					Gestiona los países disponibles en el sistema
				</p>
			</div>
			<div class="flex items-center gap-3">
				<Button variant="outline" size="sm" class="h-9" onclick={reloadData}>
					<RefreshCw class="mr-2 h-4 w-4 {loading ? 'animate-spin' : ''}" />
					Actualizar
				</Button>
				{#if canCreate}
					<Button class="h-9" onclick={() => (alert('Módulo de creación no disponible para Catálogos Públicos'))}>
						<Plus class="mr-2 h-4 w-4" />
						Nuevo País
					</Button>
				{/if}
			</div>
		</div>

		{#if error}
			<div class="flex-none rounded-md border border-destructive px-4 py-3 text-sm text-destructive">
				{error}
			</div>
		{/if}

		<Card.Root class="border bg-background flex min-h-0 flex-1 flex-col overflow-hidden">
			<Card.Header>
				<div class="flex flex-wrap items-center justify-between gap-3">
					<Card.Title>Listado de Países</Card.Title>
					<div class="flex flex-wrap items-center gap-2">
						<Input placeholder="Buscar" bind:value={searchQuery} oninput={handleSearch} class="h-9 w-44 bg-card lg:w-64" />
					</div>
				</div>
			</Card.Header>
			<Card.Content class="min-h-0 p-0 flex-1 overflow-hidden flex flex-col">
				<div class="rounded-md border bg-background overflow-hidden flex-1 h-full">
					<DataTable data={allItems} {columns} {loading} {hasMore} {loadMore} />
				</div>
			</Card.Content>
		</Card.Root>

		<div class="flex-none text-sm text-muted-foreground">Mostrando {allItems.length} de {totalItems} registros</div>
	{/if}
</div>
