import { Plug } from 'lucide-react';

import { useRef } from 'react';

import { Head, Link } from '@inertiajs/react';

import { AdminDataTable } from '@/Components/admin/AdminDataTable';
import { SortHeader } from '@/Components/admin/SortHeader';
import PageHeader from '@/Components/layout/PageHeader';
import { Badge } from '@/Components/ui/badge';
import {
  Breadcrumb,
  BreadcrumbItem,
  BreadcrumbLink,
  BreadcrumbList,
  BreadcrumbPage,
  BreadcrumbSeparator,
} from '@/Components/ui/breadcrumb';
import { ExportButton } from '@/Components/ui/export-button';
import { Input } from '@/Components/ui/input';
import {
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from '@/Components/ui/select';
import {
  Table,
  TableBody,
  TableCell,
  TableHead,
  TableHeader,
  TableRow,
} from '@/Components/ui/table';
import { useAdminFilters } from '@/hooks/useAdminFilters';
import { useAdminKeyboardShortcuts } from '@/hooks/useAdminKeyboardShortcuts';
import { useNavigationState } from '@/hooks/useNavigationState';
import AdminLayout from '@/Layouts/AdminLayout';
import { formatRelativeTime } from '@/lib/format';
import type { PaginatedResponse } from '@/types';

interface WpConnectionRow {
  id: number;
  site_id: number;
  site_name: string | null;
  site_domain: string | null;
  user_name: string | null;
  user_email: string | null;
  wp_url: string;
  status: string | null;
  plugin_version: string | null;
  webhook_enabled: boolean;
  webhook_failure_count: number;
  last_contacted_at: string | null;
  created_at: string;
}

interface Props {
  connections: PaginatedResponse<WpConnectionRow>;
  filters: {
    search?: string;
    status?: string;
    sort?: string;
    dir?: string;
  };
}

const STATUS_VARIANTS: Record<string, 'default' | 'secondary' | 'success' | 'destructive' | 'warning' | 'outline'> = {
  connected: 'success',
  pending: 'secondary',
  error: 'destructive',
};

export default function AdminWpConnectionsIndex({ connections, filters }: Props) {
  const searchInputRef = useRef<HTMLInputElement>(null);
  const { search, setSearch, updateFilter, handleSort, handlePage } = useAdminFilters({
    route: '/admin/wp-connections',
    filters,
  });
  const isNavigating = useNavigationState();
  const exportParams: Record<string, string> = {};
  if (filters.search) exportParams.search = filters.search;
  if (filters.status) exportParams.status = filters.status;

  useAdminKeyboardShortcuts({
    onSearch: () => searchInputRef.current?.focus(),
    onNextPage: connections.current_page < connections.last_page ? () => handlePage(connections.current_page + 1) : undefined,
    onPrevPage: connections.current_page > 1 ? () => handlePage(connections.current_page - 1) : undefined,
  });

  return (
    <AdminLayout>
      <Head title="Admin - WP Connections" />
      <div className="container pt-6">
        <Breadcrumb>
          <BreadcrumbList>
            <BreadcrumbItem>
              <BreadcrumbLink asChild>
                <Link href="/admin">Admin</Link>
              </BreadcrumbLink>
            </BreadcrumbItem>
            <BreadcrumbSeparator />
            <BreadcrumbItem>
              <BreadcrumbPage>WP Connections</BreadcrumbPage>
            </BreadcrumbItem>
          </BreadcrumbList>
        </Breadcrumb>
      </div>
      <PageHeader
        title="WP Connections"
        subtitle="WordPress plugin connections across all sites"
        actions={<ExportButton href={route('admin.wp-connections.export')} params={exportParams} />}
      />

      <div className="container py-8 space-y-4">
        <fieldset className="flex flex-col sm:flex-row gap-3">
          <legend className="sr-only">WP Connection Filters</legend>
          <Input
            ref={searchInputRef}
            placeholder="Search by site, domain, or WP URL..."
            value={search}
            onChange={(e) => setSearch(e.target.value)}
            className="max-w-sm"
            aria-label="Search WP connections"
          />
          <Select
            value={filters.status ?? 'all'}
            onValueChange={(v) => updateFilter({ status: v === 'all' ? undefined : v })}
          >
            <SelectTrigger className="w-[180px]" aria-label="Filter by status">
              <SelectValue placeholder="All Statuses" />
            </SelectTrigger>
            <SelectContent>
              <SelectItem value="all">All Statuses</SelectItem>
              <SelectItem value="connected">Connected</SelectItem>
              <SelectItem value="pending">Pending</SelectItem>
              <SelectItem value="error">Error</SelectItem>
            </SelectContent>
          </Select>
        </fieldset>

        <AdminDataTable
          isEmpty={connections.data.length === 0}
          isNavigating={isNavigating}
          pagination={connections}
          onPage={handlePage}
          paginationLabel="connections"
          emptyIcon={Plug}
          emptyTitle="No WP connections found"
          emptyDescription="WordPress plugin connections will appear here."
        >
          <Table>
            <TableHeader>
              <TableRow>
                <TableHead>Site</TableHead>
                <TableHead>User</TableHead>
                <TableHead>WP URL</TableHead>
                <TableHead>Status</TableHead>
                <TableHead>Plugin</TableHead>
                <TableHead>Webhook</TableHead>
                <SortHeader column="last_contacted_at" label="Last Contact" currentSort={filters.sort} currentDir={filters.dir} onSort={handleSort} />
                <SortHeader column="created_at" label="Connected" currentSort={filters.sort} currentDir={filters.dir} onSort={handleSort} />
                <TableHead className="w-16" />
              </TableRow>
            </TableHeader>
            <TableBody>
              {connections.data.map((conn) => (
                <TableRow key={conn.id}>
                  <TableCell className="max-w-[180px]">
                    <Link href={`/admin/sites/${conn.site_id}`} className="font-medium hover:underline truncate block" title={conn.site_name ?? undefined}>
                      {conn.site_name ?? '—'}
                    </Link>
                    {conn.site_domain && (
                      <div className="text-xs text-muted-foreground truncate" title={conn.site_domain}>{conn.site_domain}</div>
                    )}
                  </TableCell>
                  <TableCell className="text-sm text-muted-foreground max-w-[160px] truncate" title={conn.user_email ?? undefined}>
                    {conn.user_email ?? '—'}
                  </TableCell>
                  <TableCell className="text-xs text-muted-foreground max-w-xs truncate" title={conn.wp_url}>
                    {conn.wp_url}
                  </TableCell>
                  <TableCell>
                    {conn.status ? (
                      <Badge variant={STATUS_VARIANTS[conn.status] ?? 'secondary'}>{conn.status}</Badge>
                    ) : (
                      <span className="text-muted-foreground text-sm">—</span>
                    )}
                  </TableCell>
                  <TableCell className="text-sm text-muted-foreground">
                    {conn.plugin_version ?? '—'}
                  </TableCell>
                  <TableCell>
                    {conn.webhook_enabled ? (
                      <Badge variant="success">Enabled</Badge>
                    ) : (
                      <Badge variant="outline" className="text-muted-foreground">Disabled</Badge>
                    )}
                    {conn.webhook_failure_count > 0 && (
                      <span className="ml-1 text-xs text-destructive">{conn.webhook_failure_count} failures</span>
                    )}
                  </TableCell>
                  <TableCell className="text-sm text-muted-foreground">
                    {formatRelativeTime(conn.last_contacted_at)}
                  </TableCell>
                  <TableCell className="text-sm text-muted-foreground">
                    {formatRelativeTime(conn.created_at)}
                  </TableCell>
                  <TableCell>
                    <Link
                      href={`/admin/wp-connections/${conn.id}`}
                      className="text-xs text-primary hover:underline"
                    >
                      View →
                    </Link>
                  </TableCell>
                </TableRow>
              ))}
            </TableBody>
          </Table>
        </AdminDataTable>
      </div>
    </AdminLayout>
  );
}
