'use client';

import { useEffect, useRef, useState, useTransition } from 'react';

import Link from 'next/link';
import { useRouter } from 'next/navigation';

import { Download, Filter, Plus, Search, X } from 'lucide-react';
import { useAction } from 'next-safe-action/hooks';

import {
  AlertDialog,
  AlertDialogAction,
  AlertDialogCancel,
  AlertDialogContent,
  AlertDialogDescription,
  AlertDialogFooter,
  AlertDialogHeader,
  AlertDialogTitle,
} from '@kit/ui/alert-dialog';
import { Badge } from '@kit/ui/badge';
import { Button } from '@kit/ui/button';
import { Input } from '@kit/ui/input';
import { Popover, PopoverContent, PopoverTrigger } from '@kit/ui/popover';
import {
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from '@kit/ui/select';
import { toast } from '@kit/ui/sonner';
import { useFileDownloadAction } from '@kit/ui/use-file-download-action';

import {
  exportMembers,
  exportMembersExcel,
  bulkUpdateStatus,
  bulkArchiveMembers,
} from '../server/actions/member-actions';
import { MembersFilterPanel } from './members-filter-panel';

const STATUS_OPTIONS = [
  { value: '', label: 'Alle Status' },
  { value: 'active', label: 'Aktiv' },
  { value: 'inactive', label: 'Inaktiv' },
  { value: 'pending', label: 'Ausstehend' },
  { value: 'resigned', label: 'Ausgetreten' },
] as const;

interface MembersToolbarProps {
  account: string;
  accountId: string;
  searchValue: string;
  statusFilter: string;
  onSearchChange: (value: string) => void;
  onStatusChange: (value: string) => void;
  selectedCount: number;
  selectedIds: string[];
  departments: Array<{ id: string; name: string; memberCount: number }>;
  duesCategories: Array<{ id: string; name: string }>;
  tags?: Array<{ id: string; name: string; color: string }>;
}

export function MembersToolbar({
  account,
  accountId,
  searchValue,
  statusFilter,
  onSearchChange,
  onStatusChange,
  selectedCount,
  selectedIds,
  departments,
  duesCategories,
  tags = [],
}: MembersToolbarProps) {
  const router = useRouter();
  const [, startTransition] = useTransition();
  const [searchInput, setSearchInput] = useState(searchValue);
  const [filterOpen, setFilterOpen] = useState(false);
  const [archiveDialogOpen, setArchiveDialogOpen] = useState(false);
  const debounceRef = useRef<ReturnType<typeof setTimeout>>(null);

  const { execute: csvDownload, isPending: isCsvDownloading } =
    useFileDownloadAction(exportMembers);
  const { execute: excelDownload, isPending: isExcelDownloading } =
    useFileDownloadAction(exportMembersExcel);

  // Debounced search — auto-triggers after 300ms
  useEffect(() => {
    if (searchInput === searchValue) return;
    if (debounceRef.current) clearTimeout(debounceRef.current);
    debounceRef.current = setTimeout(() => {
      onSearchChange(searchInput);
    }, 300);
    return () => {
      if (debounceRef.current) clearTimeout(debounceRef.current);
    };
  }, [searchInput, searchValue, onSearchChange]);

  const { execute: executeBulkStatus } = useAction(bulkUpdateStatus, {
    onSuccess: () => {
      toast.success('Status aktualisiert');
      startTransition(() => router.refresh());
    },
    onError: () => toast.error('Fehler beim Aktualisieren'),
  });

  const { execute: executeBulkArchive } = useAction(bulkArchiveMembers, {
    onSuccess: () => {
      toast.success('Mitglieder archiviert');
      setArchiveDialogOpen(false);
      startTransition(() => router.refresh());
    },
    onError: () => toast.error('Fehler beim Archivieren'),
  });

  // Detect OS for shortcut hint
  const isMac =
    typeof navigator !== 'undefined' && navigator.userAgent.includes('Mac');
  const shortcutHint = isMac ? '⌘K' : 'Ctrl+K';

  return (
    <div className="space-y-3">
      {/* Main toolbar */}
      <div className="flex flex-wrap items-center gap-2">
        {/* Search */}
        <div className="relative max-w-md min-w-[200px] flex-1">
          <Search className="text-muted-foreground absolute top-1/2 left-2.5 size-4 -translate-y-1/2" />
          <Input
            placeholder="Suchen..."
            value={searchInput}
            onChange={(e) => setSearchInput(e.target.value)}
            className="pr-16 pl-9"
            data-test="members-search"
          />
          <div className="absolute top-1/2 right-2.5 flex -translate-y-1/2 items-center gap-1">
            {searchInput ? (
              <button
                className="text-muted-foreground hover:text-foreground"
                onClick={() => {
                  setSearchInput('');
                  onSearchChange('');
                }}
              >
                <X className="size-4" />
              </button>
            ) : (
              <kbd className="bg-muted text-muted-foreground rounded px-1.5 py-0.5 text-[10px] font-medium">
                {shortcutHint}
              </kbd>
            )}
          </div>
        </div>

        {/* Status filter */}
        <Select
          value={statusFilter}
          onValueChange={(v) => onStatusChange(v === 'all' ? '' : (v ?? ''))}
        >
          <SelectTrigger
            className="w-[150px]"
            data-test="members-status-filter"
          >
            <SelectValue placeholder="Alle Status" />
          </SelectTrigger>
          <SelectContent>
            {STATUS_OPTIONS.map((opt) => (
              <SelectItem key={opt.value || 'all'} value={opt.value || 'all'}>
                {opt.label}
              </SelectItem>
            ))}
          </SelectContent>
        </Select>

        {/* Advanced filter */}
        <Popover open={filterOpen} onOpenChange={setFilterOpen}>
          <PopoverTrigger
            className="border-border bg-background hover:bg-muted inline-flex h-7 items-center gap-1 rounded-lg border px-2.5 text-sm font-medium"
            data-test="members-filter-btn"
          >
            <Filter className="size-4" />
            <span className="hidden sm:inline">Filter</span>
          </PopoverTrigger>
          <PopoverContent className="w-80" align="start">
            <MembersFilterPanel
              departments={departments}
              duesCategories={duesCategories}
              onClose={() => setFilterOpen(false)}
            />
          </PopoverContent>
        </Popover>

        <div className="flex-1" />

        {/* Export — collapsed on mobile */}
        <div className="hidden items-center gap-2 sm:flex">
          <Button
            variant="outline"
            size="sm"
            onClick={() =>
              csvDownload({
                accountId,
                status: statusFilter || undefined,
                format: 'csv' as const,
              })
            }
            disabled={isCsvDownloading}
            data-test="members-export-csv"
          >
            <Download className="mr-1.5 size-4" />
            CSV
          </Button>
          <Button
            variant="outline"
            size="sm"
            onClick={() =>
              excelDownload({
                accountId,
                status: statusFilter || undefined,
                format: 'excel' as const,
              })
            }
            disabled={isExcelDownloading}
            data-test="members-export-excel"
          >
            <Download className="mr-1.5 size-4" />
            Excel
          </Button>
        </div>

        {/* Create */}
        <Link
          href={`/home/${account}/members-cms/new`}
          className="bg-primary text-primary-foreground hover:bg-primary/90 inline-flex h-7 items-center gap-1 rounded-lg px-2.5 text-sm font-medium transition-colors"
          data-test="members-create-btn"
        >
          <Plus className="size-4" />
          <span className="hidden sm:inline">Neues Mitglied</span>
          <span className="sm:hidden">Neu</span>
        </Link>
      </div>

      {/* Bulk actions bar */}
      {selectedCount > 0 && (
        <div className="bg-muted/50 border-primary/20 flex items-center gap-3 rounded-lg border px-4 py-2">
          <Badge variant="secondary" className="tabular-nums">
            {selectedCount} ausgewählt
          </Badge>

          <Select
            onValueChange={(status) =>
              executeBulkStatus({
                memberIds: selectedIds,
                accountId,
                status: status as any,
              })
            }
          >
            <SelectTrigger className="h-8 w-[160px]">
              <SelectValue placeholder="Status ändern" />
            </SelectTrigger>
            <SelectContent>
              <SelectItem value="active">Aktiv setzen</SelectItem>
              <SelectItem value="inactive">Inaktiv setzen</SelectItem>
              <SelectItem value="pending">Ausstehend setzen</SelectItem>
            </SelectContent>
          </Select>

          <Button
            variant="outline"
            size="sm"
            onClick={() => setArchiveDialogOpen(true)}
            data-test="members-bulk-archive"
          >
            Archivieren
          </Button>
        </div>
      )}

      {/* Archive confirmation dialog */}
      <AlertDialog open={archiveDialogOpen} onOpenChange={setArchiveDialogOpen}>
        <AlertDialogContent>
          <AlertDialogHeader>
            <AlertDialogTitle>Mitglieder archivieren</AlertDialogTitle>
            <AlertDialogDescription>
              Möchten Sie {selectedCount} Mitglied
              {selectedCount > 1 ? 'er' : ''} wirklich archivieren?
            </AlertDialogDescription>
          </AlertDialogHeader>
          <AlertDialogFooter>
            <AlertDialogCancel>Abbrechen</AlertDialogCancel>
            <AlertDialogAction
              onClick={() =>
                executeBulkArchive({ memberIds: selectedIds, accountId })
              }
            >
              Archivieren
            </AlertDialogAction>
          </AlertDialogFooter>
        </AlertDialogContent>
      </AlertDialog>
    </div>
  );
}