'use client';

import { useState, useEffect, useCallback } from 'react';

type DeletedProduct = {
  id: number;
  name: string;
  normalizedName: string;
  canonicalName?: string | null;
  category?: string | null;
  brand?: string | null;
  deletedAt?: string | null;
};

export default function DeletedProductsView() {
  const [products, setProducts] = useState<DeletedProduct[]>([]);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState<string | null>(null);
  const [pendingId, setPendingId] = useState<number | null>(null);
  const [search, setSearch] = useState('');

  const fetchDeleted = useCallback(() => {
    setLoading(true);
    setError(null);
    fetch('/api/admin/deleted-products')
      .then((r) => r.json())
      .then((data) => {
        if (Array.isArray(data)) setProducts(data);
        else setError('Kunde inte ladda raderade produkter.');
      })
      .catch(() => setError('Nätverksfel. Försök igen.'))
      .finally(() => setLoading(false));
  }, []);

  useEffect(() => { fetchDeleted(); }, [fetchDeleted]);

  const handleRestore = async (id: number) => {
    if (!confirm('Återställ produkten?')) return;
    setPendingId(id);
    try {
      const res = await fetch(`/api/admin/deleted-products/${id}`, { method: 'POST' });
      if (!res.ok) {
        const d = await res.json().catch(() => ({}));
        setError(d?.error ?? 'Kunde inte återställa produkten.');
      } else {
        setProducts((prev) => prev.filter((p) => p.id !== id));
      }
    } catch {
      setError('Nätverksfel. Försök igen.');
    } finally {
      setPendingId(null);
    }
  };

  const handlePermanentDelete = async (id: number, name: string) => {
    if (!confirm(`Radera "${name}" permanent? Detta kan inte ångras.`)) return;
    setPendingId(id);
    try {
      const res = await fetch(`/api/admin/deleted-products/${id}`, { method: 'DELETE' });
      if (!res.ok) {
        const d = await res.json().catch(() => ({}));
        setError(d?.error ?? 'Kunde inte radera produkten permanent.');
      } else {
        setProducts((prev) => prev.filter((p) => p.id !== id));
      }
    } catch {
      setError('Nätverksfel. Försök igen.');
    } finally {
      setPendingId(null);
    }
  };

  const filtered = products.filter((p) =>
    p.name.toLowerCase().includes(search.toLowerCase()) ||
    (p.canonicalName ?? '').toLowerCase().includes(search.toLowerCase())
  );

  if (loading) return <p style={{ color: '#888' }}>Laddar raderade produkter...</p>;

  return (
    <div>
      <p style={{ color: '#555', marginBottom: '1rem' }}>
        Här visas produkter som mjukraderats. Du kan återställa dem eller radera dem permanent.
      </p>

      {error && (
        <div style={{ color: '#c00', background: '#fff0f0', border: '1px solid #fcc', borderRadius: 6, padding: '0.5rem 1rem', marginBottom: '1rem' }}>
          {error}
        </div>
      )}

      <div style={{ display: 'flex', gap: '0.5rem', marginBottom: '1rem', alignItems: 'center' }}>
        <input
          type="text"
          placeholder="Sök på namn..."
          value={search}
          onChange={(e) => setSearch(e.target.value)}
          style={{ padding: '0.4rem 0.75rem', borderRadius: 6, border: '1px solid #ccc', fontSize: '0.9rem', minWidth: 220 }}
        />
        <span style={{ color: '#888', fontSize: '0.85rem' }}>
          {filtered.length} av {products.length} produkter
        </span>
        <button
          onClick={fetchDeleted}
          style={{ marginLeft: 'auto', padding: '0.35rem 0.75rem', borderRadius: 6, border: '1px solid #ccc', background: '#f8f8f8', cursor: 'pointer', fontSize: '0.85rem' }}
        >
          Uppdatera
        </button>
      </div>

      {filtered.length === 0 ? (
        <p style={{ color: '#888', fontStyle: 'italic' }}>Inga raderade produkter hittades.</p>
      ) : (
        <div style={{ overflowX: 'auto' }}>
          <table style={{ width: '100%', borderCollapse: 'collapse', fontSize: '0.9rem' }}>
            <thead>
              <tr style={{ background: '#f2f2f2', textAlign: 'left' }}>
                <th style={{ padding: '0.5rem 0.75rem', borderBottom: '2px solid #ddd' }}>ID</th>
                <th style={{ padding: '0.5rem 0.75rem', borderBottom: '2px solid #ddd' }}>Namn</th>
                <th style={{ padding: '0.5rem 0.75rem', borderBottom: '2px solid #ddd' }}>Canonical name</th>
                <th style={{ padding: '0.5rem 0.75rem', borderBottom: '2px solid #ddd' }}>Kategori</th>
                <th style={{ padding: '0.5rem 0.75rem', borderBottom: '2px solid #ddd' }}>Raderades</th>
                <th style={{ padding: '0.5rem 0.75rem', borderBottom: '2px solid #ddd' }}>Åtgärder</th>
              </tr>
            </thead>
            <tbody>
              {filtered.map((p) => (
                <tr key={p.id} style={{ borderBottom: '1px solid #eee' }}>
                  <td style={{ padding: '0.5rem 0.75rem', color: '#888' }}>{p.id}</td>
                  <td style={{ padding: '0.5rem 0.75rem', fontWeight: 500 }}>{p.name}</td>
                  <td style={{ padding: '0.5rem 0.75rem', color: '#666' }}>{p.canonicalName || '–'}</td>
                  <td style={{ padding: '0.5rem 0.75rem', color: '#666' }}>{p.category || '–'}</td>
                  <td style={{ padding: '0.5rem 0.75rem', color: '#999', fontSize: '0.8rem' }}>
                    {p.deletedAt ? new Date(p.deletedAt).toLocaleDateString('sv-SE') : '–'}
                  </td>
                  <td style={{ padding: '0.5rem 0.75rem' }}>
                    <div style={{ display: 'flex', gap: '0.4rem' }}>
                      <button
                        disabled={pendingId === p.id}
                        onClick={() => handleRestore(p.id)}
                        style={{
                          padding: '0.25rem 0.6rem',
                          borderRadius: 5,
                          border: '1px solid #3a7d44',
                          background: '#eafaf1',
                          color: '#276032',
                          cursor: pendingId === p.id ? 'not-allowed' : 'pointer',
                          fontSize: '0.8rem',
                          fontWeight: 500,
                        }}
                      >
                        Återställ
                      </button>
                      <button
                        disabled={pendingId === p.id}
                        onClick={() => handlePermanentDelete(p.id, p.name)}
                        style={{
                          padding: '0.25rem 0.6rem',
                          borderRadius: 5,
                          border: '1px solid #c00',
                          background: '#fff0f0',
                          color: '#c00',
                          cursor: pendingId === p.id ? 'not-allowed' : 'pointer',
                          fontSize: '0.8rem',
                          fontWeight: 500,
                        }}
                      >
                        Radera permanent
                      </button>
                    </div>
                  </td>
                </tr>
              ))}
            </tbody>
          </table>
        </div>
      )}
    </div>
  );
}