import Link from 'next/link';

import { BedDouble, CalendarCheck, Plus, Euro, Search } from 'lucide-react';

import { createBookingManagementApi } from '@kit/booking-management/api';
import { formatDate } from '@kit/shared/dates';
import { getSupabaseServerClient } from '@kit/supabase/server-client';
import { Badge } from '@kit/ui/badge';
import { Button } from '@kit/ui/button';
import { Card, CardContent, CardHeader, CardTitle } from '@kit/ui/card';
import { Input } from '@kit/ui/input';

import { AccountNotFound } from '~/components/account-not-found';
import { CmsPageShell } from '~/components/cms-page-shell';
import { EmptyState } from '~/components/empty-state';
import { StatsCard } from '~/components/stats-card';

interface PageProps {
  params: Promise<{ account: string }>;
  searchParams: Promise<Record<string, string | string[] | undefined>>;
}

const PAGE_SIZE = 25;

const STATUS_BADGE_VARIANT: Record<
  string,
  'secondary' | 'default' | 'info' | 'outline' | 'destructive'
> = {
  pending: 'secondary',
  confirmed: 'default',
  checked_in: 'info',
  checked_out: 'outline',
  cancelled: 'destructive',
};

const STATUS_LABEL: Record<string, string> = {
  pending: 'Ausstehend',
  confirmed: 'Bestätigt',
  checked_in: 'Eingecheckt',
  checked_out: 'Ausgecheckt',
  cancelled: 'Storniert',
  no_show: 'Nicht erschienen',
};

export default async function BookingsPage({
  params,
  searchParams,
}: PageProps) {
  const { account } = await params;
  const search = await searchParams;
  const client = getSupabaseServerClient();

  const { data: acct } = await client
    .from('accounts')
    .select('id')
    .eq('slug', account)
    .single();

  if (!acct) {
    return (
      <CmsPageShell account={account} title="Buchungen">
        <AccountNotFound />
      </CmsPageShell>
    );
  }

  const searchQuery = typeof search.q === 'string' ? search.q : '';
  const page = Number(search.page) || 1;

  const api = createBookingManagementApi(client);
  const rooms = await api.listRooms(acct.id);

  // Fetch bookings with joined room & guest names (avoids displaying raw UUIDs)
  const bookingsQuery = client
    .from('bookings')
    .select(
      '*, room:rooms(id, room_number, name), guest:guests(id, first_name, last_name)',
      { count: 'exact' },
    )
    .eq('account_id', acct.id)
    .order('check_in', { ascending: false })
    .range((page - 1) * PAGE_SIZE, page * PAGE_SIZE - 1);

  const { data: bookingsRaw, count: bookingsTotal } = await bookingsQuery;

  /* eslint-disable @typescript-eslint/no-explicit-any */
  let bookingsData = (bookingsRaw ?? []) as Array<Record<string, any>>;
  const total = bookingsTotal ?? 0;

  // Post-filter by search query (guest name or room name/number)
  if (searchQuery) {
    const q = searchQuery.toLowerCase();
    bookingsData = bookingsData.filter((b) => {
      const room = b.room as Record<string, string> | null;
      const guest = b.guest as Record<string, string> | null;
      const roomName = (room?.name ?? '').toLowerCase();
      const roomNumber = (room?.room_number ?? '').toLowerCase();
      const guestFirst = (guest?.first_name ?? '').toLowerCase();
      const guestLast = (guest?.last_name ?? '').toLowerCase();
      return (
        roomName.includes(q) ||
        roomNumber.includes(q) ||
        guestFirst.includes(q) ||
        guestLast.includes(q)
      );
    });
  }

  const activeBookings = bookingsData.filter(
    (b) => b.status === 'confirmed' || b.status === 'checked_in',
  );

  const totalPages = Math.ceil(total / PAGE_SIZE);

  return (
    <CmsPageShell account={account} title="Buchungen">
      <div className="flex w-full flex-col gap-6">
        {/* Header */}
        <div className="flex items-center justify-between">
          <p className="text-muted-foreground">
            Zimmer und Buchungen verwalten
          </p>

          <Link href={`/home/${account}/bookings/new`}>
            <Button>
              <Plus className="mr-2 h-4 w-4" />
              Neue Buchung
            </Button>
          </Link>
        </div>

        {/* Stats */}
        <div className="grid grid-cols-1 gap-4 sm:grid-cols-2 lg:grid-cols-3">
          <StatsCard
            title="Zimmer"
            value={rooms.length}
            icon={<BedDouble className="h-5 w-5" />}
          />
          <StatsCard
            title="Aktive Buchungen"
            value={activeBookings.length}
            icon={<CalendarCheck className="h-5 w-5" />}
          />
          <StatsCard
            title="Gesamt"
            value={total}
            icon={<Euro className="h-5 w-5" />}
          />
        </div>

        {/* Search */}
        <form className="flex items-center gap-2">
          <div className="relative max-w-sm flex-1">
            <Search className="text-muted-foreground absolute top-1/2 left-2.5 h-4 w-4 -translate-y-1/2" />
            <Input
              name="q"
              defaultValue={searchQuery}
              placeholder="Gast oder Zimmer suchen…"
              className="pl-9"
            />
          </div>
          <Button type="submit" variant="secondary" size="sm">
            Suchen
          </Button>
          {searchQuery && (
            <Link href={`/home/${account}/bookings`}>
              <Button type="button" variant="ghost" size="sm">
                Zurücksetzen
              </Button>
            </Link>
          )}
        </form>

        {/* Table or Empty State */}
        {bookingsData.length === 0 ? (
          <EmptyState
            icon={<BedDouble className="h-8 w-8" />}
            title={
              searchQuery
                ? 'Keine Buchungen gefunden'
                : 'Keine Buchungen vorhanden'
            }
            description={
              searchQuery
                ? `Keine Ergebnisse für „${searchQuery}".`
                : 'Erstellen Sie Ihre erste Buchung, um loszulegen.'
            }
            actionLabel={searchQuery ? undefined : 'Neue Buchung'}
            actionHref={
              searchQuery ? undefined : `/home/${account}/bookings/new`
            }
          />
        ) : (
          <Card>
            <CardHeader>
              <CardTitle>
                {searchQuery
                  ? `Ergebnisse (${bookingsData.length})`
                  : `Alle Buchungen (${total})`}
              </CardTitle>
            </CardHeader>
            <CardContent>
              <div className="rounded-md border">
                <table className="w-full text-sm">
                  <thead>
                    <tr className="bg-muted/50 border-b">
                      <th className="p-3 text-left font-medium">Zimmer</th>
                      <th className="p-3 text-left font-medium">Gast</th>
                      <th className="p-3 text-left font-medium">Anreise</th>
                      <th className="p-3 text-left font-medium">Abreise</th>
                      <th className="p-3 text-left font-medium">Status</th>
                      <th className="p-3 text-right font-medium">Betrag</th>
                    </tr>
                  </thead>
                  <tbody>
                    {bookingsData.map((booking) => {
                      const room = booking.room as Record<
                        string,
                        string
                      > | null;
                      const guest = booking.guest as Record<
                        string,
                        string
                      > | null;

                      return (
                        <tr
                          key={String(booking.id)}
                          className="hover:bg-muted/30 border-b"
                        >
                          <td className="p-3">
                            <Link
                              href={`/home/${account}/bookings/${String(booking.id)}`}
                              className="font-medium hover:underline"
                            >
                              {room
                                ? `${room.room_number}${room.name ? ` – ${room.name}` : ''}`
                                : '—'}
                            </Link>
                          </td>
                          <td className="p-3">
                            {guest
                              ? `${guest.first_name} ${guest.last_name}`
                              : '—'}
                          </td>
                          <td className="p-3">
                            {formatDate(booking.check_in)}
                          </td>
                          <td className="p-3">
                            {formatDate(booking.check_out)}
                          </td>
                          <td className="p-3">
                            <Badge
                              variant={
                                STATUS_BADGE_VARIANT[String(booking.status)] ??
                                'secondary'
                              }
                            >
                              {STATUS_LABEL[String(booking.status)] ??
                                String(booking.status)}
                            </Badge>
                          </td>
                          <td className="p-3 text-right">
                            {booking.total_price != null
                              ? `${Number(booking.total_price).toFixed(2)} €`
                              : '—'}
                          </td>
                        </tr>
                      );
                    })}
                  </tbody>
                </table>
              </div>

              {/* Pagination */}
              {totalPages > 1 && !searchQuery && (
                <div className="flex items-center justify-between border-t px-2 py-4">
                  <p className="text-muted-foreground text-sm">
                    Seite {page} von {totalPages} ({total} Einträge)
                  </p>
                  <div className="flex items-center gap-2">
                    {page > 1 ? (
                      <Link href={`/home/${account}/bookings?page=${page - 1}`}>
                        <Button variant="outline" size="sm">
                          Zurück
                        </Button>
                      </Link>
                    ) : (
                      <Button variant="outline" size="sm" disabled>
                        Zurück
                      </Button>
                    )}

                    {page < totalPages ? (
                      <Link href={`/home/${account}/bookings?page=${page + 1}`}>
                        <Button variant="outline" size="sm">
                          Weiter
                        </Button>
                      </Link>
                    ) : (
                      <Button variant="outline" size="sm" disabled>
                        Weiter
                      </Button>
                    )}
                  </div>
                </div>
              )}
            </CardContent>
          </Card>
        )}
      </div>
    </CmsPageShell>
  );
}