// German strings address the operator as "Sie" — never "Du".
// The usertest panel flagged Du/Sie breaks (store search, flow
// empty states) as a recurring trust issue for the regulated
// audience, so this guard scans the DE catalog for unambiguous
// second-person-singular forms. Progress messages in the first
// person ("Starte …" = the app announcing its own action) stay
// legal; only forms that address the reader are rejected.

import 'dart:convert';
import 'dart:io';

import 'package:flutter_test/flutter_test.dart';

void main() {
  test('DE catalog contains no informal (Du) address', () {
    final raw = File('lib/l10n/app_de.arb').readAsStringSync();
    final map = jsonDecode(raw) as Map<String, dynamic>;
    // Pronouns + possessives + common 2nd-person-singular verb
    // forms. Word-bounded so "individuell" or "Bedingungen"
    // never match.
    final informal = RegExp(
      r"\b(du|dich|dir|dein|deine|deiner|deinem|deinen|deins|"
      r"brauchst|tippst|willst|kannst|hast|bist|machst|siehst|"
      r"klickst|wählst|öffnest|startest|versuchst|versuch's)\b",
      caseSensitive: false,
    );
    final offenders = <String>[];
    map.forEach((key, value) {
      if (key.startsWith('@') || value is! String) return;
      final m = informal.firstMatch(value);
      if (m != null) {
        offenders.add('$key: "${m.group(0)}" in "$value"');
      }
    });
    expect(
      offenders,
      isEmpty,
      reason:
          'German UI strings must use the formal Sie address:\n'
          '${offenders.join('\n')}',
    );
  });
}