import 'package:flisp_app/provider/todo_provider.dart';
import 'package:flisp_app/widgets/awesome_dialog.dart';
import 'package:flisp_app/widgets/todo_widget.dart';
import 'package:flutter/material.dart';
import 'package:flutter_form_builder/flutter_form_builder.dart';
import 'package:provider/provider.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_form.dart';

class TodoPage extends StatefulWidget {
  final VoidCallback? onAddTodoPressed;

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

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

class TodoPageState extends State<TodoPage> {
  // 待办事项列表
  final List<TodoItem> _todos = [];

  TodoTab _currentTab = TodoTab.all;

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

  // 添加一个公共方法供外部调用
  void showAddTodoDialog() {
    _showTodoDialog(false, null);
  }

  @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) {
            _showTodoDialog(true, todo);
          },
        );
  }

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

  // 显示对话框
  void _showTodoDialog(bool isEditing, TodoItem? todo) {
    final todoProvider = Provider.of<TodoProvider>(context, listen: false);

    if (isEditing) {
      todoProvider.initForm(todo!);
    } else {
      todoProvider.resetForm();
    }

    final formKey = GlobalKey<FormBuilderState>();

    showAwesomeDialog(
      context: context,
      body: TodoForm(formKey: formKey, isEditing: isEditing, initialTodo: todo),
      onOk: () {
        if (formKey.currentState!.saveAndValidate()) {
          Navigator.of(context).pop();
          _saveTodo(isEditing, todoProvider.formItem);
        }
      },
      onCancel: () {
        todoProvider.resetForm();
      },
    );
  }

  // 保存待办事项
  void _saveTodo(bool isEditing, TodoItem todo) {
    final store = Provider.of<TodoProvider>(context, listen: false);

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

    store.resetForm();
    showSuccessDialog(context, isEditing ? '更新成功' : '添加成功');
  }
}