PMU_Puchkina_A.A_PIbd-32/lib/main.dart

import 'dart:math';
import 'package:app/FinanceManager.dart';

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

import 'dart:async';

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: 'Пучкина Анна Алексеевна'),
    );
  }
}

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

  final String title;

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

// Расширение для класса Transaction
extension TransactionExtensions on Transaction {
  String get formattedAmount => '${amount.toStringAsFixed(2)}';
}

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

  final FinanceManager _financeManager = FinanceManager();
  bool _isClearing = false;

  int counter = 1;

  void _addRandomTransaction() {
    final random = Random();
    final description = 'Транзакция $counter';
    final amount = random.nextDouble() * 1000;
    final category = TransactionCategory.values[random.nextInt(TransactionCategory.values.length)];

    final transaction = Transaction(description, amount, category);
    _financeManager.addTransaction(transaction);
    counter++;

    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>[
            Text(
              'Учет расходов',
              style: TextStyle(fontSize: 24, fontWeight: FontWeight.bold),
            ),
            SizedBox(height: 10),
            Text(
              'Итоговая сумма: ${_financeManager.calculateTotalAmount().toStringAsFixed(2)}',
              style: TextStyle(fontSize: 20, fontWeight: FontWeight.bold),
            ),
            SizedBox(height: 20),
            Expanded(
              child: SingleChildScrollView(
                child: Column(
                  children: <Widget>[
                    for (var category in TransactionCategory.values)
                      Column(
                        crossAxisAlignment: CrossAxisAlignment.start,
                        children: [
                          Text(
                            'Категория: ${category.name}',
                            style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold),
                          ),
                          for (var transaction in _financeManager.filterTransactionsByCategory(category))
                            Text(
                              '${transaction.description} - Сумма: ${transaction.formattedAmount}',
                              style: const TextStyle(fontSize: 18),
                            ),
                          SizedBox(height: 10),
                        ],
                      ),
                    if (_isClearing)
                      Padding(
                        padding: const EdgeInsets.all(16.0),
                        child: Text(
                          'Очищение списка...',
                          style: TextStyle(fontSize: 18, color: Colors.red),
                        ),
                      ),
                  ],

                ),

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