'use client';

import { useEffect, useState } from 'react';
import type { Kuppel, LogbuchEintrag } from '@/types/logbuch';

interface Props {
  kuppel: Kuppel;
  refreshKey: number;
  onEdit: (entry: LogbuchEintrag) => void;
  limit?: number;
  compact?: boolean;
}

function formatDateTime(dt: string, short = false): string {
  if (!dt) return '';
  const d = new Date(dt);
  if (isNaN(d.getTime())) return dt;
  if (short) {
    const pad = (n: number) => String(n).padStart(2, '0');
    return `${pad(d.getDate())}.${pad(d.getMonth() + 1)}. ${pad(d.getHours())}:${pad(d.getMinutes())}`;
  }
  return d.toLocaleString('de-DE', { day: '2-digit', month: '2-digit', year: 'numeric', hour: '2-digit', minute: '2-digit' });
}

export default function LogbuchList({ kuppel, refreshKey, onEdit, limit = 20, compact = false }: Props) {
  const [entries, setEntries] = useState<LogbuchEintrag[]>([]);
  const [loading, setLoading] = useState(true);
  const [deleteId, setDeleteId] = useState<number | null>(null);
  const [error, setError] = useState('');

  useEffect(() => {
    setLoading(true);
    fetch(`/api/logbuch?kuppel=${encodeURIComponent(kuppel)}&limit=${limit}`)
      .then((r) => { if (!r.ok) throw new Error(); return r.json(); })
      .then((data) => { setEntries(data); setLoading(false); })
      .catch(() => { setError('Fehler beim Laden.'); setLoading(false); });
  }, [kuppel, refreshKey, limit]);

  async function confirmDelete(id: number) {
    try {
      const res = await fetch(`/api/logbuch/${id}`, { method: 'DELETE' });
      if (!res.ok) throw new Error();
      setEntries((prev) => prev.filter((e) => e.ID !== id));
    } catch {
      setError('Fehler beim Löschen.');
    } finally {
      setDeleteId(null);
    }
  }

  if (loading) return <div className="text-gray-500 text-sm py-4">Lade Einträge...</div>;
  if (error) return <div className="text-red-600 text-sm py-4">{error}</div>;
  if (entries.length === 0) return <div className="text-gray-500 text-sm py-4">Keine Einträge vorhanden.</div>;

  const cell = compact
    ? 'px-1.5 py-1 border border-gray-200 text-xs'
    : 'px-3 py-2 border border-gray-200';
  const head = compact
    ? 'px-1.5 py-1 border border-gray-300 text-xs font-semibold'
    : 'px-3 py-2 border border-gray-300';

  return (
    <div>
      <div className="overflow-x-auto">
        <table className="w-full border-collapse" style={{ fontSize: compact ? '0.75rem' : '0.875rem' }}>
          <thead>
            <tr className="bg-gray-100 text-left">
              <th className={`${head} whitespace-nowrap`}>Beginn</th>
              <th className={`${head} whitespace-nowrap`}>Ende</th>
              <th className={head}>Art</th>
              <th className={`${head} text-center w-10`}>Bes.</th>
              <th className={head}>BEOs</th>
              <th className={head}>Objekte</th>
              {!compact && <th className={head}>Bemerkungen</th>}
              <th className={`${head} text-center print:hidden`}>Aktionen</th>
            </tr>
          </thead>
          <tbody>
            {entries.map((e) => (
              <tr key={e.ID} className="hover:bg-gray-50">
                <td className={`${cell} whitespace-nowrap`}>{formatDateTime(e.Beginn, compact)}</td>
                <td className={`${cell} whitespace-nowrap`}>{formatDateTime(e.Ende, compact)}</td>
                <td className={cell}>{e.ArtFuehrung}</td>
                <td className={`${cell} text-center`}>{e.Besucher || ''}</td>
                <td className={cell}>{e.BEOs || '—'}</td>
                <td className={cell}>{e.Objekte || '—'}</td>
                {!compact && (
                  <td className={cell}>{e.Bemerkungen || ''}</td>
                )}
                <td className={`${cell} text-center whitespace-nowrap print:hidden`}>
                  <button
                    onClick={() => onEdit(e)}
                    className="text-blue-600 hover:text-blue-800 mr-2 font-medium"
                  >
                    ✎
                  </button>
                  <button
                    onClick={() => setDeleteId(e.ID)}
                    className="text-red-600 hover:text-red-800 font-medium"
                  >
                    ✕
                  </button>
                </td>
              </tr>
            ))}
          </tbody>
        </table>
      </div>

      {deleteId !== null && (
        <div className="fixed inset-0 bg-black/40 flex items-center justify-center z-50">
          <div className="bg-white rounded-xl shadow-xl p-6 max-w-sm w-full mx-4">
            <h3 className="text-lg font-semibold mb-3">Eintrag löschen?</h3>
            <p className="text-sm text-gray-600 mb-5">Dieser Eintrag wird unwiderruflich gelöscht.</p>
            <div className="flex gap-3 justify-end">
              <button
                onClick={() => setDeleteId(null)}
                className="px-4 py-2 bg-gray-200 hover:bg-gray-300 text-gray-700 rounded-lg text-sm"
              >
                Abbrechen
              </button>
              <button
                onClick={() => confirmDelete(deleteId)}
                className="px-4 py-2 bg-red-600 hover:bg-red-700 text-white rounded-lg text-sm"
              >
                Löschen
              </button>
            </div>
          </div>
        </div>
      )}
    </div>
  );
}