import 'package:flisp_app/provider/todo_provider.dart';
import 'package:flisp_app/service/todo_service.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> {
  final TodoService todoService = TodoService();

  late List<Todo> _todos;
  TodoTab _currentTab = TodoTab.active;

  // 获取过滤后的待办事项
  List<Todo> get _activeTodos => getActiveTodos(_currentTab, _todos);

  void showAddTodoDialog() {
    _showTodoDialog(false, null);
  }

  @override
  void initState() {
    super.initState();
    _todos = todoService.getAllTodos();
  }

  @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: (todo) {
        setState(() {
          _toggleTodo(todo);
        });
      },
      onEditTodo: (todo) {
        _showTodoDialog(true, todo);
      },
    );
  }

  // 切换待办事项完成状态
  void _toggleTodo(Todo todo) {
    setState(() {
      todoService.updateTodoCompletion(todo, !todo.isCompleted);
    });
  }

  // 显示对话框
  void _showTodoDialog(bool isEditing, Todo? 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, Todo todo) async {
    late bool isSuccess ;
    if (isEditing) {
      isSuccess = await todoService.updateTodo(todo);
    } else {
      isSuccess = await todoService.addTodo(todo);
    }

    setState(() {
      _todos = todoService.getAllTodos();
    });

    if (isSuccess) {
      showSuccessDialog(context, isEditing ? '更新成功' : '添加成功');
    } else {
      showErrorDialog(context, isEditing ? '更新失败' : '添加失败');
    }
  }
}