import 'package:flutter/material.dart';

import '../app/app_controller.dart';
import '../app/settings.dart';
import '../core/file_ops.dart' show samePath;
import '../core/vfs.dart';
import '../l10n/tr.dart';
import 'theme.dart';

/// 73: 파일 탐색기 즐겨찾기 - 지금 폴더를 넣고 창 위에서 한 번에 간다.
/// Rsync 화면에서는 "왼쪽 A + 오른쪽 B" 짝을 넣고 한 번에 연다.
/// [right] 가 있으면 Rsync 화면 (지금 오른쪽 폴더). [go] 는 이 창으로, [goPair] 는 두 창을 함께.
Future<void> showFolderBookmarks(
  BuildContext context,
  AppController c, {
  required String current,
  String? right,
  required void Function(String dir) go,
  void Function(String left, String right)? goPair,
}) async {
  await showDialog<void>(
    context: context,
    builder: (ctx) => _BookmarksDialog(c: c, current: current, right: right, go: go, goPair: goPair),
  );
}

class _BookmarksDialog extends StatefulWidget {
  final AppController c;
  final String current;
  final String? right;
  final void Function(String dir) go;
  final void Function(String left, String right)? goPair;
  const _BookmarksDialog({required this.c, required this.current, this.right, required this.go, this.goPair});

  @override
  State<_BookmarksDialog> createState() => _BookmarksDialogState();
}

class _BookmarksDialogState extends State<_BookmarksDialog> {
  AppSettings get s => widget.c.settings;
  bool get _rsync => widget.right != null && widget.goPair != null;

  Future<void> _save(List<FolderBookmark> list) async {
    await widget.c.updateSettings((x) => x.folderBookmarks = list);
    if (mounted) setState(() {});
  }

  Future<String?> _askName(String initial, String title) async {
    final name = await showDialog<String>(context: context, builder: (_) => _NameDialog(initial: initial, title: title));
    final t = name?.trim();
    return t == null || t.isEmpty ? null : t;
  }

  Future<void> _add({required bool pair}) async {
    final b = pair
        ? FolderBookmark(name: '${vBasename(widget.current)} ⇄ ${vBasename(widget.right!)}', path: widget.current, right: widget.right)
        : FolderBookmark(name: vBasename(widget.current).isEmpty ? widget.current : vBasename(widget.current), path: widget.current);
    final name = await _askName(b.name, pair ? tr('지금 짝을 즐겨찾기에') : tr('지금 폴더를 즐겨찾기에'));
    if (name == null) return;
    await _save([...s.folderBookmarks, b.copyWith(name: name)]);
  }

  void _open(FolderBookmark b) {
    Navigator.pop(context);
    if (b.isPair && widget.goPair != null) {
      widget.goPair!(b.path, b.right!);
    } else {
      widget.go(b.path);
    }
  }

  @override
  Widget build(BuildContext context) {
    final mine = [for (final b in s.folderBookmarks) if (_rsync || !b.isPair) b];
    // 바로 가기: 다운로드 폴더 · MKV 결과 폴더 (넣지 않아도)
    final shortcuts = [
      (tr('다운로드'), s.resolvedDownloadRoot()),
      if (s.mkv.outputRoot?.isNotEmpty ?? false) (tr('MKV 결과 폴더'), s.mkv.outputRoot!),
    ].where((x) => !mine.any((b) => !b.isPair && samePath(b.path, x.$2))).toList();
    final already = mine.any((b) => !b.isPair && samePath(b.path, widget.current));
    final pairAlready = _rsync && mine.any((b) => b.isPair && samePath(b.path, widget.current) && samePath(b.right!, widget.right!));
    return AlertDialog(
      title: Text(tr('즐겨찾기')),
      contentPadding: const EdgeInsets.fromLTRB(8, 12, 8, 0),
      content: SizedBox(
        width: 480,
        child: ListView(shrinkWrap: true, children: [
          if (mine.isEmpty)
            Padding(
              padding: const EdgeInsets.all(12),
              child: Text(tr('아직 없습니다. 아래에서 지금 폴더를 넣으세요.'), style: TextStyle(color: JjColors.textDim)),
            ),
          for (final b in mine)
            ListTile(
              dense: true,
              leading: Icon(b.isPair ? Icons.compare_arrows : Icons.star, color: JjColors.amber, size: 20),
              title: Text(b.name, maxLines: 1, overflow: TextOverflow.ellipsis),
              subtitle: Text(b.isPair ? '${vDisplay(b.path)}\n⇄ ${vDisplay(b.right!)}' : vDisplay(b.path),
                  maxLines: b.isPair ? 2 : 1, overflow: TextOverflow.ellipsis, style: const TextStyle(fontSize: 11)),
              onTap: () => _open(b),
              trailing: Row(mainAxisSize: MainAxisSize.min, children: [
                IconButton(
                  tooltip: tr('이름 바꾸기'),
                  visualDensity: VisualDensity.compact,
                  icon: const Icon(Icons.edit_outlined, size: 18),
                  onPressed: () async {
                    final name = await _askName(b.name, tr('이름 바꾸기'));
                    if (name != null) await _save([for (final x in s.folderBookmarks) identical(x, b) ? x.copyWith(name: name) : x]);
                  },
                ),
                IconButton(
                  tooltip: tr('즐겨찾기에서 빼기 (폴더는 그대로)'),
                  visualDensity: VisualDensity.compact,
                  icon: const Icon(Icons.close, size: 18),
                  onPressed: () => _save([for (final x in s.folderBookmarks) if (!identical(x, b)) x]),
                ),
              ]),
            ),
          if (shortcuts.isNotEmpty) ...[
            const Divider(),
            for (final (name, dir) in shortcuts)
              ListTile(
                dense: true,
                leading: const Icon(Icons.folder_special_outlined, size: 20),
                title: Text(name),
                subtitle: Text(vDisplay(dir), maxLines: 1, overflow: TextOverflow.ellipsis, style: const TextStyle(fontSize: 11)),
                onTap: () {
                  Navigator.pop(context);
                  widget.go(dir);
                },
              ),
          ],
        ]),
      ),
      actions: [
        if (_rsync)
          TextButton.icon(
            onPressed: pairAlready ? null : () => _add(pair: true),
            icon: const Icon(Icons.compare_arrows, size: 18),
            label: Text(tr('지금 짝 추가')),
          ),
        TextButton.icon(
          onPressed: already || widget.current.isEmpty ? null : () => _add(pair: false),
          icon: const Icon(Icons.star_border, size: 18),
          label: Text(tr('지금 폴더 추가')),
        ),
        TextButton(onPressed: () => Navigator.pop(context), child: Text(tr('닫기'))),
      ],
    );
  }
}

/// 표시 이름 넣기 (글 칸은 창이 닫히는 동안에도 그려지므로 창이 스스로 가지고 버린다)
class _NameDialog extends StatefulWidget {
  final String initial;
  final String title;
  const _NameDialog({required this.initial, required this.title});

  @override
  State<_NameDialog> createState() => _NameDialogState();
}

class _NameDialogState extends State<_NameDialog> {
  late final _ctl = TextEditingController(text: widget.initial);

  @override
  void dispose() {
    _ctl.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) => AlertDialog(
        title: Text(widget.title),
        content: TextField(
          controller: _ctl,
          autofocus: true,
          decoration: InputDecoration(labelText: tr('표시 이름')),
          onSubmitted: (v) => Navigator.pop(context, v),
        ),
        actions: [
          TextButton(onPressed: () => Navigator.pop(context), child: Text(tr('취소'))),
          FilledButton(onPressed: () => Navigator.pop(context, _ctl.text), child: Text(tr('확인'))),
        ],
      );
}