import 'package:flutter_test/flutter_test.dart';
import 'package:eaimar/core/translations/language/en_us.dart';
import 'package:eaimar/core/translations/language/is_is.dart';

Set<String> _extractPlaceholders(String value) {
  final placeholders = <String>{};

  placeholders.addAll(
    RegExp(r'\{[a-zA-Z_][a-zA-Z0-9_]*\}')
        .allMatches(value)
        .map((m) => m.group(0)!)
        .toSet(),
  );

  placeholders.addAll(
    RegExp(r'@[a-zA-Z_][a-zA-Z0-9_]*')
        .allMatches(value)
        .map((m) => m.group(0)!)
        .toSet(),
  );

  placeholders.addAll(
    RegExp(r'\$\{[a-zA-Z_][a-zA-Z0-9_]*\}')
        .allMatches(value)
        .map((m) => m.group(0)!)
        .toSet(),
  );

  placeholders.addAll(
    RegExp(r'%(?:\d+\$)?[sdif]')
        .allMatches(value)
        .map((m) => m.group(0)!)
        .toSet(),
  );

  return placeholders;
}

void main() {
  test('isIS can be imported and accessed', () {
    expect(isIS, isNotEmpty);
    expect(isIS['continue'], isNotNull);
  });

  test('isIS has the same translation keys as enUS', () {
    expect(isIS.keys.toSet(), equals(enUS.keys.toSet()));
  });

  test('isIS has no empty values', () {
    final emptyKeys = isIS.entries
        .where((entry) => entry.value.trim().isEmpty)
        .map((entry) => entry.key)
        .toList(growable: false);
    expect(emptyKeys, isEmpty);
  });

  test('isIS placeholders match enUS placeholders', () {
    final mismatches = <String>[];

    for (final key in enUS.keys) {
      final enValue = enUS[key] ?? '';
      final isValue = isIS[key] ?? '';

      final enPlaceholders = _extractPlaceholders(enValue);
      final isPlaceholders = _extractPlaceholders(isValue);

      if (enPlaceholders.length != isPlaceholders.length ||
          !enPlaceholders.containsAll(isPlaceholders) ||
          !isPlaceholders.containsAll(enPlaceholders)) {
        mismatches.add(
          '$key | en=$enPlaceholders | is=$isPlaceholders | enValue=$enValue | isValue=$isValue',
        );
      }
    }

    expect(mismatches, isEmpty);
  });
}