import 'package:flutter/material.dart';
import 'package:win_text_editor/app/models/tab_model.dart';
import 'package:win_text_editor/app/providers/logger.dart';
import 'package:win_text_editor/app/widgets/template_parser_tab.dart';

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

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

  final Map<String, TemplateParserTabState> _tabControllers = {};

  void registerTextTabController(String tabId, TemplateParserTabState controller) {
    _tabControllers[tabId] = controller;
  }

  void unregisterTextTabController(String tabId) {
    _tabControllers.remove(tabId);
  }

  ContentTab? 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 title = '未命名',
    String? type,
    IconData? icon,
    String content = '',
  }) async {
    final newTab = ContentTab(
      id: DateTime.now().millisecondsSinceEpoch.toString(),
      title: title,
      type: type,
      icon: icon,
      content: content,
    );

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

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

  void updateContent(String tabId, String content, String? name) {
    try {
      final tab = _tabs.firstWhere((t) => t.id == tabId);
      tab.content = content;

      if (name != null) {
        tab.fileName = name;
      }
      // Logger().debug("内容更新成功,文件:${tab.fileName}, ${tab.content.length}");
      notifyListeners();
    } catch (e) {
      Logger().error("更新内容失败: ${e.toString()}", source: 'EditorProvider');
    }
  }

  Future<void> requestLoadFile(BuildContext context, String filePath) async {
    if (_activeTabId == null) {
      Logger().warning("没有活动选项卡，无法加载文件");
      return;
    }

    final parserTabState = _tabControllers[_activeTabId];
    if (parserTabState == null) {
      Logger().warning("找不到 TextTab 状态");
      return;
    }

    if (!parserTabState.mounted) {
      Logger().warning("TextTab 状态组件未挂载");
      return;
    }

    try {
      await parserTabState.loadFile(context, filePath);
    } catch (e) {
      Logger().error("加载文件失败: ${e.toString()}");
      if (context.mounted) {
        ScaffoldMessenger.of(
          context,
        ).showSnackBar(SnackBar(content: Text('加载文件失败: ${e.toString()}')));
      }
    }
  }
}