import 'package:flutter/material.dart';
import 'package:dio/dio.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Todo App',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: TodoListScreen(),
    );
  }
}

class Todo {
  final int userId;
  final int id;
  final String title;
  final bool completed;

  Todo({required this.userId, required this.id, required this.title, required this.completed});

  factory Todo.fromJson(Map<String, dynamic> json) {
    return Todo(
      userId: json['userId'],
      id: json['id'],
      title: json['title'],
      completed: json['completed'],
    );
  }
}

class TodoListScreen extends StatefulWidget {
  @override
  _TodoListScreenState createState() => _TodoListScreenState();
}

class _TodoListScreenState extends State<TodoListScreen> {
  List<Todo> todos = [];
  List<Todo> filteredTodos = [];
  TextEditingController searchController = TextEditingController();

  @override
  void initState() {
    super.initState();
    fetchTodos();
  }

  @override
  void dispose() {
    searchController.dispose();
    super.dispose();
  }

  Future<void> fetchTodos() async {
    try {
      final response = await Dio().get('https://jsonplaceholder.typicode.com/todos');
      if (response.statusCode == 200) {
        final List<dynamic> data = response.data;
        setState(() {
          todos = data.map((item) => Todo.fromJson(item)).take(10).toList();
          filteredTodos = todos;
        });
      }
    } catch (e) {
      print('Error fetching todos: $e');
    }
  }

  void searchTodos() {
    String query = searchController.text;
    setState(() {
      if (query.isEmpty) {
        filteredTodos = todos;
      } else {
        filteredTodos = todos.where((todo) {
          bool matchesUserId = false;
          try {
            int queryInt = int.parse(query);
            matchesUserId = todo.userId == queryInt;
          } catch (e) {
            // query is not a number, ignore this part
          }
          return matchesUserId || todo.title.toLowerCase().contains(query.toLowerCase());
        }).toList();
      }
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Todo List'),
      ),
      body: Column(
        children: [
          Padding(
            padding: const EdgeInsets.all(8.0),
            child: Row(
              children: [
                Expanded(
                  child: TextField(
                    controller: searchController,
                    decoration: const InputDecoration(
                      labelText: 'Search by User ID or Title',
                      prefixIcon: Icon(Icons.search),
                      border: OutlineInputBorder(),
                    ),
                  ),
                ),
                const SizedBox(width: 10),
                ElevatedButton(
                  onPressed: searchTodos,
                  child: const Text('Search'),
                ),
              ],
            ),
          ),
          Expanded(
            child: ListView.builder(
              itemCount: filteredTodos.length,
              itemBuilder: (context, index) {
                final todo = filteredTodos[index];
                return ListTile(
                  title: Text(todo.title),
                  subtitle: Text('User ID: ${todo.userId}'),
                  trailing: todo.completed ? const Icon(Icons.check_box) : const Icon(Icons.check_box_outline_blank),
                );
              },
            ),
          ),
        ],
      ),
    );
  }
}

import 'package:flutter/material.dart';
import 'package:dio/dio.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Todo App',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const TodoListScreen(),
    );
  }
}

class Todo {
  final int userId;
  final int id;
  final String title;
  final bool completed;

  const Todo({required this.userId, required this.id, required this.title, required this.completed});

  factory Todo.fromJson(Map<String, dynamic> json) {
    return Todo(
      userId: json['userId'],
      id: json['id'],
      title: json['title'],
      completed: json['completed'],
    );
  }
}

class TodoListScreen extends StatefulWidget {
  const TodoListScreen({Key? key}) : super(key: key);

  @override
  _TodoListScreenState createState() => _TodoListScreenState();
}

class _TodoListScreenState extends State<TodoListScreen> {
  List<Todo> todos = [];
  final TextEditingController searchController = TextEditingController();
  String searchQuery = '';

  @override
  void initState() {
    super.initState();
    fetchTodos();
    searchController.addListener(_onSearchChanged);
  }

  @override
  void dispose() {
    searchController.removeListener(_onSearchChanged);
    searchController.dispose();
    super.dispose();
  }

  void _onSearchChanged() {
    setState(() {
      searchQuery = searchController.text;
    });
  }

  Future<void> fetchTodos() async {
    try {
      final response = await Dio().get('https://jsonplaceholder.typicode.com/todos');
      if (response.statusCode == 200) {
        final List<dynamic> data = response.data;
        setState(() {
          todos = data.map((item) => Todo.fromJson(item)).toList();
        });
      }
    } catch (e) {
      print('Error fetching todos: $e');
    }
  }

  bool _filterTodo(Todo todo) {
    if (searchQuery.isEmpty) return true;
    final lowercaseQuery = searchQuery.toLowerCase();
    return todo.title.toLowerCase().contains(lowercaseQuery) ||
           todo.userId.toString() == searchQuery;
  }

  @override
  Widget build(BuildContext context) {
    final filteredTodos = todos.where(_filterTodo).toList();

    return Scaffold(
      appBar: AppBar(
        title: const Text('Todo List'),
      ),
      body: Column(
        children: [
          Padding(
            padding: const EdgeInsets.all(8.0),
            child: TextField(
              controller: searchController,
              decoration: const InputDecoration(
                labelText: 'Search by User ID or Title',
                prefixIcon: Icon(Icons.search),
                border: OutlineInputBorder(),
              ),
            ),
          ),
          Expanded(
            child: ListView.builder(
              key: ValueKey(searchQuery), // Add this line
              itemCount: filteredTodos.length,
              itemBuilder: (context, index) {
                final todo = filteredTodos[index];
                return ListTile(
                  key: ValueKey(todo.id), // Add this line
                  title: Text(todo.title),
                  subtitle: Text('User ID: ${todo.userId}'),
                  trailing: todo.completed
                      ? const Icon(Icons.check_box)
                      : const Icon(Icons.check_box_outline_blank),
                );
              },
            ),
          ),
        ],
      ),
    );
  }
}