import 'package:cookit/src/recipes/amount.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:intl/date_symbol_data_local.dart';

void main() {
  setUpAll(() => initializeDateFormatting('de'));

  group('parseAmount', () {
    final cases = <String, Amount?>{
      '': (amount: null, amountMax: null),
      '2': (amount: 2, amountMax: null),
      '1,5': (amount: 1.5, amountMax: null),
      '0.25': (amount: 0.25, amountMax: null),
      '½': (amount: 0.5, amountMax: null),
      '1½': (amount: 1.5, amountMax: null),
      '1/2': (amount: 0.5, amountMax: null),
      '1 1/2': (amount: 1.5, amountMax: null),
      '2-3': (amount: 2, amountMax: 3),
      '10 – 12': (amount: 10, amountMax: 12),
      '1 bis 2': (amount: 1, amountMax: 2),
      'etwas': null,
      '2-': null,
    };
    cases.forEach((input, expected) {
      test('"$input"', () => expect(parseAmount(input), expected));
    });
  });

  group('formatAmount', () {
    test('uses fraction glyphs and German decimals', () {
      expect(formatAmount(1.5, null), '1½');
      expect(formatAmount(0.25, null), '¼');
      expect(formatAmount(0.333, null), '⅓');
      expect(formatAmount(2, null), '2');
      expect(formatAmount(1.4, null), '1,4');
      expect(formatAmount(1000, null), '1.000');
      expect(formatAmount(2, 3), '2–3');
      expect(formatAmount(null, null), '');
    });

    test('round-trips through parseAmount', () {
      for (final value in [0.5, 1.5, 2.0, 1.4, 250.0]) {
        expect(parseAmount(formatAmount(value, null))!.amount, closeTo(value, 0.001));
      }
    });
  });
}