import { Search } from 'lucide-react';

import { useEffect, useRef } from 'react';

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

import { AdminDataTable } from '@/Components/admin/AdminDataTable';
import { ChartErrorBoundary } from '@/Components/admin/ChartErrorBoundary';
import { PerPageSelector } from '@/Components/admin/PerPageSelector';
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 { trackProductEvent } from '@/lib/analytics';
import { ADMIN_FINDINGS_VIEWED } from '@/lib/event-catalog';
import { formatRelativeTime } from '@/lib/format';
import type { PaginatedResponse } from '@/types';

interface FindingRow {
  id: number;
  analysis_run_id: number;
  site_name: string | null;
  site_domain: string | null;
  dimension_type: string;
  created_at: string;
}

interface Props {
  findings: PaginatedResponse<FindingRow>;
  filters: {
    search?: string;
    dimension_type?: string;
    sort?: string;
    dir?: string;
    per_page?: number;
  };
}

const DIMENSION_TYPES = ['overall', 'country', 'device', 'search_type'];

export default function AdminFindingsIndex({ findings, filters }: Props) {
  useEffect(() => {
    trackProductEvent(ADMIN_FINDINGS_VIEWED, {
      total_findings: findings.total ?? findings.data.length,
    });
    // intentional: fire-once on mount
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, []);

  const searchInputRef = useRef<HTMLInputElement>(null);
  const { search, setSearch, updateFilter, handleSort, handlePage } = useAdminFilters({
    route: '/admin/findings',
    filters,
  });
  const isNavigating = useNavigationState();
  const hasFilters = !!(filters.search || filters.dimension_type);
  const exportParams: Record<string, string> = {};
  if (filters.search) exportParams.search = filters.search;
  if (filters.dimension_type) exportParams.dimension_type = filters.dimension_type;

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

  return (
    <AdminLayout>
      <Head title="Admin - Findings" />
      <div className="container pt-6">
        <Breadcrumb>
          <BreadcrumbList>
            <BreadcrumbItem>
              <BreadcrumbLink asChild>
                <Link href="/admin">Admin</Link>
              </BreadcrumbLink>
            </BreadcrumbItem>
            <BreadcrumbSeparator />
            <BreadcrumbItem>
              <BreadcrumbPage>Findings</BreadcrumbPage>
            </BreadcrumbItem>
          </BreadcrumbList>
        </Breadcrumb>
      </div>
      <PageHeader
        title="Findings"
        subtitle="Traffic analysis findings across all analysis runs"
        actions={<ExportButton href={route('admin.findings.export')} params={exportParams} />}
      />

      <div className="container py-8 space-y-4">
        <fieldset className="flex flex-col sm:flex-row gap-3 sm:items-center">
          <legend className="sr-only">Finding Filters</legend>
          <Input
            ref={searchInputRef}
            placeholder="Search by site or domain..."
            value={search}
            onChange={(e) => setSearch(e.target.value)}
            className="max-w-sm"
            aria-label="Search findings"
          />
          <Select
            value={filters.dimension_type ?? 'all'}
            onValueChange={(v) => updateFilter({ dimension_type: v === 'all' ? undefined : v })}
          >
            <SelectTrigger className="w-[200px]" aria-label="Filter by dimension type">
              <SelectValue placeholder="All Dimensions" />
            </SelectTrigger>
            <SelectContent>
              <SelectItem value="all">All Dimensions</SelectItem>
              {DIMENSION_TYPES.map((d) => (
                <SelectItem key={d} value={d}>
                  {d}
                </SelectItem>
              ))}
            </SelectContent>
          </Select>
          <div className="sm:ml-auto">
            <PerPageSelector
              value={filters.per_page ?? 50}
              onChange={(perPage) => updateFilter({ per_page: perPage })}
            />
          </div>
        </fieldset>

        <ChartErrorBoundary label="Unable to load findings table">
          <AdminDataTable
            isEmpty={findings.data.length === 0}
            isNavigating={isNavigating}
            isLoading={isNavigating}
            pagination={findings}
            onPage={handlePage}
            paginationLabel="findings"
            emptyIcon={Search}
            emptyTitle={hasFilters ? 'No findings match your search' : 'No analysis findings yet'}
            emptyDescription={
              hasFilters
                ? 'Try clearing your filters to see all findings.'
                : 'Findings appear here automatically after analysis runs complete.'
            }
          >
            <Table>
              <TableHeader>
                <TableRow>
                  <TableHead>ID</TableHead>
                  <TableHead>Analysis Run</TableHead>
                  <TableHead>Site</TableHead>
                  <TableHead>Dimension</TableHead>
                  <SortHeader
                    column="created_at"
                    label="Created"
                    currentSort={filters.sort}
                    currentDir={filters.dir}
                    onSort={handleSort}
                  />
                  <TableHead className="w-16" />
                </TableRow>
              </TableHeader>
              <TableBody>
                {findings.data.map((finding) => (
                  <TableRow key={finding.id}>
                    <TableCell className="font-mono text-xs text-muted-foreground">
                      #{finding.id}
                    </TableCell>
                    <TableCell>
                      <Link
                        href={`/admin/analysis-runs?id=${finding.analysis_run_id}`}
                        className="text-sm hover:underline text-muted-foreground"
                      >
                        #{finding.analysis_run_id}
                      </Link>
                    </TableCell>
                    <TableCell>
                      <div className="font-medium text-sm">{finding.site_name ?? '—'}</div>
                      {finding.site_domain && (
                        <div className="text-xs text-muted-foreground">{finding.site_domain}</div>
                      )}
                    </TableCell>
                    <TableCell>
                      <Badge variant="secondary">{finding.dimension_type}</Badge>
                    </TableCell>
                    <TableCell className="text-sm text-muted-foreground">
                      {formatRelativeTime(finding.created_at)}
                    </TableCell>
                    <TableCell>
                      <Link
                        href={`/admin/findings/${finding.id}`}
                        className="text-xs text-primary hover:underline"
                      >
                        View →
                      </Link>
                    </TableCell>
                  </TableRow>
                ))}
              </TableBody>
            </Table>
          </AdminDataTable>
        </ChartErrorBoundary>
      </div>
    </AdminLayout>
  );
}
