import 'package:awesome_dialog/awesome_dialog.dart';
import 'package:flisp_app/models/todo.dart';
import 'package:flisp_app/utils/todo_utils.dart';
import 'package:flisp_app/widgets/common.dart';
import 'package:flisp_app/widgets/todo_dialog.dart';
import 'package:flisp_app/widgets/todo_widget.dart';
import 'package:flutter/material.dart';

class TodoPage extends StatefulWidget {
  final VoidCallback? onAddTodoPressed;

  const TodoPage({super.key, this.onAddTodoPressed});

  @override
  State<TodoPage> createState() => TodoPageState();
}

class TodoPageState extends State<TodoPage> {
  // 添加一个公共方法供外部调用
  void showAddTodoDialog() {
    _showAddTodoDialog();
  }

  // 待办事项列表
  final List<TodoItem> _todos = [
    // ... 原有的待办事项数据保持不变
  ];

  TodoTab _currentTab = TodoTab.all;
  final TextEditingController _titleController = TextEditingController();
  final TextEditingController _descriptionController = TextEditingController();
  DateTime? _selectedDueDate;
  TodoPriority _selectedPriority = TodoPriority.medium;
  String? _selectedCategory;

  // 获取过滤后的待办事项
  List<TodoItem> get _activeTodos {
    return getActiveTodos(_currentTab, _todos);
  }

  @override
  Widget build(BuildContext context) {
    return buildBody(
      child: Column(
        children: [
          // 统计信息卡片
          buildStatsCard(_todos),
          // 选项卡
          buildTabs(
            currentTab: _currentTab,
            onTabChanged: (value) {
              setState(() {
                _currentTab = value;
              });
            },
          ),
          // 待办事项列表
          Expanded(child: _buildActiveTodoList()),
        ],
      ),
    );
  }

  Widget _buildActiveTodoList() {
    return _activeTodos.isEmpty
        ? buildEmptyState(_currentTab)
        : buildTodoList(
        todos: _activeTodos,
        onToggleTodo: (todoId) {
          setState(() {
            _toggleTodo(todoId);
          });
        },
        onEditTodo: (todo) {
          _showEditTodoDialog(todo);
        }
    );
  }

  // 显示添加待办事项对话框
  void _showAddTodoDialog() {
    _resetForm();

    showAwesomeDialog(
      context: context,
      body: _buildTodoDialogContent(isEditing: false),
      onOk: () => _saveTodo(false, null),
      onCancel: () => _resetForm(),
    );
  }

  // 显示编辑待办事项对话框
  void _showEditTodoDialog(TodoItem todo) {
    _titleController.text = todo.title;
    _descriptionController.text = todo.description ?? '';
    _selectedDueDate = todo.dueDate;
    _selectedPriority = todo.priority;
    _selectedCategory = todo.category;

    showAwesomeDialog(
      context: context,
      body: _buildTodoDialogContent(isEditing: true),
      onOk: () => _saveTodo(true, todo),
      onCancel: () => _resetForm(),
    );
  }

  // 构建待办事项对话框 - 现在使用新的组件
  Widget _buildTodoDialogContent({bool isEditing = false}) {
    return TodoDialogContent(
      isEditing: isEditing,
      titleController: _titleController,
      descriptionController: _descriptionController,
      selectedDueDate: _selectedDueDate,
      selectedPriority: _selectedPriority,
      selectedCategory: _selectedCategory,
      onDueDateChanged: (date) {
        setState(() {
          _selectedDueDate = date;
        });
      },
      onPriorityChanged: (priority) {
        setState(() {
          _selectedPriority = priority;
        });
      },
      onCategoryChanged: (category) {
        setState(() {
          _selectedCategory = category;
        });
      },
      onClearDueDate: () {
        setState(() {
          _selectedDueDate = null;
        });
        // 重新显示对话框以更新状态
        if (isEditing) {
          _showEditTodoDialog(_todos.firstWhere((todo) =>
          _titleController.text == todo.title &&
              _descriptionController.text == (todo.description ?? '')));
        } else {
          _showAddTodoDialog();
        }
      },
      onSelectDueDate: () => _selectDueDateInDialog(isEditing),
    );
  }

  // 在对话框中选择日期
  Future<void> _selectDueDateInDialog(bool isEditing) async {
    final DateTime? picked = await showDatePicker(
      context: context,
      initialDate: DateTime.now(),
      firstDate: DateTime.now(),
      lastDate: DateTime(2100),
    );

    if (picked != null) {
      setState(() {
        _selectedDueDate = picked;
      });
      // 重新显示对话框以更新日期显示
      if (isEditing) {
        // 找到对应的待办事项重新显示编辑对话框
        final todo = _todos.firstWhere((todo) =>
        _titleController.text == todo.title &&
            _descriptionController.text == (todo.description ?? ''));
        _showEditTodoDialog(todo);
      } else {
        _showAddTodoDialog();
      }
    }
  }

  // 验证表单
  bool _validateForm() {
    return _titleController.text.trim().isNotEmpty;
  }

  // 重置表单
  void _resetForm() {
    _titleController.clear();
    _descriptionController.clear();
    _selectedDueDate = null;
    _selectedPriority = TodoPriority.medium;
    _selectedCategory = null;
  }

  // 保存待办事项
  void _saveTodo(bool isEditing, TodoItem? todo) {
    if (!_validateForm()) return;

    final newTodo = TodoItem(
      id: isEditing ? todo!.id : DateTime.now().millisecondsSinceEpoch.toString(),
      title: _titleController.text.trim(),
      description: _descriptionController.text.trim().isEmpty
          ? null
          : _descriptionController.text.trim(),
      dueDate: _selectedDueDate,
      priority: _selectedPriority,
      category: _selectedCategory,
    );

    setState(() {
      if (isEditing) {
        final index = _todos.indexWhere((t) => t.id == todo!.id);
        if (index != -1) {
          _todos[index] = newTodo.copyWith(
            isCompleted: _todos[index].isCompleted,
          );
        }
      } else {
        _todos.insert(0, newTodo);
      }
    });

    _resetForm();

    // 显示成功提示
    _showSuccessDialog(isEditing ? '更新成功' : '添加成功');
  }

  // 显示成功提示
  void _showSuccessDialog(String message) {
    AwesomeDialog(
      context: context,
      dialogType: DialogType.success,
      animType: AnimType.scale,
      title: message,
      btnOkText: "好的",
      btnOkColor: Colors.green,
      btnOkOnPress: () {},
      autoHide: Duration(seconds: 2),
    ).show();
  }

  // 切换待办事项完成状态
  void _toggleTodo(String id) {
    setState(() {
      final index = _todos.indexWhere((todo) => todo.id == id);
      if (index != -1) {
        _todos[index] = _todos[index].copyWith(
          isCompleted: !_todos[index].isCompleted,
        );
      }
    });
  }

  @override
  void dispose() {
    _titleController.dispose();
    _descriptionController.dispose();
    super.dispose();
  }
}