manta/win_text_editor/lib/frame/widgets/tab_manager.dart

import 'package:flutter/material.dart';
import 'package:win_text_editor/frame/models/tab_model.dart';
import 'package:win_text_editor/shared/base/base_view.dart';
import 'package:win_text_editor/frame/providers/logger.dart';

class TabManager with ChangeNotifier {
  final List<AppTab> _tabs = [];
  String? _activeTabId;

  List<AppTab> get tabs => _tabs;
  String? get activeTabId => _activeTabId;

  BaseViewState? _activeViewState;

  AppTab? get activeTab {
    if (_activeTabId == null) return null;
    try {
      return _tabs.firstWhere((tab) => tab.id == _activeTabId);
    } catch (e) {
      Logger().error("找不到活动选项卡: $_activeTabId", source: 'EditorProvider');
      return null;
    }
  }

  Future<void> addTab(
    String id, {
    String title = '未命名',
    String? type,
    IconData? icon,
    String content = '',
  }) async {
    final newTab = AppTab(id: id, title: title, type: type, icon: icon, content: content);

    _tabs.add(newTab);
    _activeTabId = newTab.id;
    notifyListeners();
  }

  AppTab? getTabById(String tabId) {
    try {
      return _tabs.firstWhere((tab) => tab.id == tabId);
    } catch (e) {
      Logger().error("找不到选项卡: ${tabId}", source: 'EditorProvider');
      return null;
    }
  }

  void closeTab(String tabId) {
    Logger().info('关闭选项卡: $tabId');
    _tabs.removeWhere((tab) => tab.id == tabId);
    if (_activeTabId == tabId) {
      _activeTabId = _tabs.isNotEmpty ? _tabs.last.id : null;
    }
    notifyListeners();
  }

  void setActiveTab(String tabId) {
    if (_activeTabId == tabId) return; // 如果已经是活动Tab则不通知

    Logger().info('设置活动选项卡: $tabId');
    _activeTabId = tabId;
    notifyListeners();
  }

  void handleFolderDoubleTap(String folderPath) {
    _activeViewState?.onOpenFolder(folderPath);
  }

  void handleFileDoubleTap(String filePath) {
    _activeViewState?.onOpenFile(filePath);
  }

  void setActiveViewState(BaseViewState? state) {
    if (_activeViewState != state) {
      _activeViewState = state;
      // 不需要 notifyListeners()，因为这只是内部状态更新
    }
  }
}