import 'dart:math';
import 'package:flutter/material.dart';
import 'task.dart';
import 'taskManager.dart';

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

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
        useMaterial3: true,
      ),
      home: const MyHomePage(title: 'Чубыкина Полина Павловна'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

enum TaskPriority {
  low,
  medium,
  high,
}

extension TaskPriorityExtension on TaskPriority {
  String get displayName {
    switch (this) {
      case TaskPriority.low:
        return 'Low';
      case TaskPriority.medium:
        return 'Medium';
      case TaskPriority.high:
        return 'High';
    }
  }
}

class _MyHomePageState extends State<MyHomePage> {
  Color _color = Colors.orangeAccent;

  final TaskManager _taskManager = TaskManager();

  void _addRandomTask() {
    const priorities = TaskPriority.values;
    final randomPriority = priorities[Random().nextInt(priorities.length)];
    final newTask = Task('Task ${_taskManager.getTasks().length + 1}', randomPriority);
    _taskManager.addTask(newTask);
    setState(() {
      _color = Color((Random().nextDouble() * 0xFFFFFF).toInt()).withOpacity(1.0);
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        backgroundColor: _color,
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Expanded(
              child: SingleChildScrollView(
                child: Column(
                  children: <Widget>[
                    for (var task in _taskManager.getTasks())
                      Text(
                        '${task.title}: Priority - ${task.priority.displayName}',
                        style: const TextStyle(fontSize: 18),
                      ),
                  ],
                ),
              ),
            ),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: () async {
          _addRandomTask();
          await _taskManager.simulateTaskProcessing();
        },
        backgroundColor: _color,
        child: const Icon(Icons.add),
      ),
    );
  }
}