import 'dart:math';
import 'dart:async';
import 'VideoCards.dart';
import 'VideoCardsManager.dart';
import 'package:flutter/material.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.teal),
          useMaterial3: true,
        ),
        home: const MyHomePage(title: 'Бацылев Владислав Алексеевич'),
      );
    }
  }

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

  final String title;

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

extension VideoCardsExtensions on VideoCards {
  String get formattedPrice => '${price.toStringAsFixed(2)}';
}

class _MyHomePageState extends State<MyHomePage> {
   Color _color = Colors.grey;
  final VideoCardsManager _videoCardsManager = VideoCardsManager();
  bool _isClearing = false;

  int counter = 2;

  void _addRandomVideocards() {
    final random = Random();
    final videomemory = '$counter Gb';
    final price = random.nextDouble() * 15000;
    final category = VideoCardsCategory.values[random.nextInt(
        VideoCardsCategory.values.length)];

    final videocards = VideoCards(videomemory, price, category);
    _videoCardsManager.addVideoCards(videocards);
    counter = counter + 2;

    setState(() {
      switch (category) {
        case VideoCardsCategory.Nvidia:
          _color = Colors.green;
        case VideoCardsCategory.Asus:
          _color = Colors.blue;
        case VideoCardsCategory.Msi:
          _color = Colors.red;
        case VideoCardsCategory.AMD:
          _color = Colors.redAccent;
        case VideoCardsCategory.Palit:
          _color = Colors.brown;
      }
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        backgroundColor: _color,
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              const Text(
                'Характеристики Видеокарт',
                style: TextStyle(fontSize: 24, fontWeight: FontWeight.bold),
              ),
            SizedBox (height: 20),
            Expanded(
              child: SingleChildScrollView(
                child: Column(
                  children: <Widget>[
                    for (var category in VideoCardsCategory.values)
                      Column(
                        crossAxisAlignment: CrossAxisAlignment.start,
                        children: [
                          Text(
                            'Видеокарты: ${category.name}',
                            style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold),
                          ),
                          for (var videocards in _videoCardsManager.filterVideoCardsByCategory(category))
                            Text(
                              '${videocards.videomemory} - Цена: ${videocards.formattedPrice} рублей.',
                              style: const TextStyle(fontSize: 18),
                            ),
                          SizedBox(height: 10),
                        ],
                      ),
                    if (_isClearing)
                      const Padding(
                        padding: const EdgeInsets.all(16.0),
                          child: Text(
                            'Очищение списка...',
                            style: TextStyle(fontSize: 18, color: Colors.blueGrey),
                          ),
                      ),
                  ],

                ),

              ),
            ),
            ],
        ),
      ),
      floatingActionButton: Row(
        mainAxisAlignment: MainAxisAlignment.end,
        children: [
          FloatingActionButton(
            onPressed: () async {
              _addRandomVideocards();
            },
            backgroundColor: _color,
            child: const Icon(Icons.add),
          ),
          SizedBox(width: 10),
          FloatingActionButton(
            onPressed: () async {
              setState(() {
                _isClearing = true;
              });
              await _videoCardsManager.clearVideoCards();
              setState(() {
                _isClearing = false;
              });
            },
            backgroundColor: Colors.red,
            child: const Icon(Icons.clear),
          ),
        ],
      ),
    );
  }
}