import 'package:flutter_test/flutter_test.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:words999/models/syncretic_session_model.dart';
import 'package:words999/models/word_of_day_model.dart';
import 'package:words999/services/word_of_the_day_service.dart';
import 'package:words999/services/words_repository.dart';

void main() {
  TestWidgetsFlutterBinding.ensureInitialized();

  setUpAll(() async {
    SharedPreferences.setMockInitialValues({});
    await WordsRepository().init(remoteDailyShuffle: false);
    await WordOfTheDayService().init();
  });

  group('WordOfTheDayService & Model Tests', () {
    test('Date key format and parse consistency', () {
      final date = DateTime(2026, 9, 28);
      final key = WordOfTheDayService.formatDateKey(date);
      expect(key, '2026-09-28');

      final parsed = WordOfTheDayService.parseDateKey(key);
      expect(parsed.year, 2026);
      expect(parsed.month, 9);
      expect(parsed.day, 28);
    });

    test('Deterministic daily word hash is consistent for identical dates', () {
      final date1 = DateTime(2026, 9, 28);
      final date2 = DateTime(2026, 9, 28, 23, 59, 59);

      final idx1 = WordOfTheDayService.calculateWordIndexForDate(date1, 1000);
      final idx2 = WordOfTheDayService.calculateWordIndexForDate(date2, 1000);
      expect(idx1, equals(idx2));

      final word1 = WordOfTheDayService().getWordForDate(date1);
      final word2 = WordOfTheDayService().getWordForDate(date2);
      expect(word1.id, equals(word2.id));
      expect(word1.word, equals(word2.word));
    });

    test('Adjacent dates yield distinct words across calendar', () {
      final day1 = DateTime(2026, 9, 27);
      final day2 = DateTime(2026, 9, 28);
      final day3 = DateTime(2026, 9, 29);

      final idx1 = WordOfTheDayService.calculateWordIndexForDate(day1, 1000);
      final idx2 = WordOfTheDayService.calculateWordIndexForDate(day2, 1000);
      final idx3 = WordOfTheDayService.calculateWordIndexForDate(day3, 1000);

      expect(idx1, isNot(equals(idx2)));
      expect(idx2, isNot(equals(idx3)));
    });

    test('Triptych mode provides 3 distinct words for Morning, Day, and Evening', () {
      final date = DateTime(2026, 9, 28);
      final triptych = WordOfTheDayService().getTriptychWordsForDate(date);

      expect(triptych.morning.id, isNot(equals(triptych.day.id)));
      expect(triptych.day.id, isNot(equals(triptych.evening.id)));
      expect(triptych.morning.id, isNot(equals(triptych.evening.id)));
    });

    test('WordOfDayRecord JSON serialization and copyWith with Triptych', () {
      const rec = WordOfDayRecord(
        dateKey: '2026-09-28',
        wordId: 42,
        isRevealed: true,
        isStepCompleted: false,
        diaryNote: 'Удивительная синхрония в разговоре',
        isTriptychMode: true,
        morningWordId: 10,
        dayWordId: 20,
        eveningWordId: 30,
        isMorningRevealed: true,
        isDayRevealed: true,
        isEveningRevealed: false,
        isDayStepCompleted: true,
      );

      final jsonStr = rec.toJson();
      final decoded = WordOfDayRecord.fromJson(jsonStr);

      expect(decoded.dateKey, '2026-09-28');
      expect(decoded.wordId, 42);
      expect(decoded.isTriptychMode, isTrue);
      expect(decoded.morningWordId, 10);
      expect(decoded.dayWordId, 20);
      expect(decoded.eveningWordId, 30);
      expect(decoded.isMorningRevealed, isTrue);
      expect(decoded.isDayRevealed, isTrue);
      expect(decoded.isEveningRevealed, isFalse);
      expect(decoded.isDayStepCompleted, isTrue);
      expect(decoded.isAnyRevealed, isTrue);
      expect(decoded.areAllTriptychRevealed, isFalse);

      final allRevealed = decoded.copyWith(isEveningRevealed: true);
      expect(allRevealed.areAllTriptychRevealed, isTrue);
    });

    test('Reveal specific triptych phases and persist', () async {
      final service = WordOfTheDayService();
      final testDate = DateTime(2026, 11, 20);

      await service.setRecordTriptychMode(testDate, true);
      var rec = service.getRecord(testDate);
      expect(rec.isTriptychMode, isTrue);
      expect(rec.isMorningRevealed, isFalse);

      await service.revealWord(testDate, phase: 'morning');
      rec = service.getRecord(testDate);
      expect(rec.isMorningRevealed, isTrue);
      expect(rec.isDayRevealed, isFalse);

      await service.revealWord(testDate, phase: 'day');
      rec = service.getRecord(testDate);
      expect(rec.isDayRevealed, isTrue);
      expect(rec.isEveningRevealed, isFalse);

      await service.revealWord(testDate, phase: 'evening');
      rec = service.getRecord(testDate);
      expect(rec.isEveningRevealed, isTrue);
      expect(rec.areAllTriptychRevealed, isTrue);

      await service.toggleStepCompleted(testDate, true, isDayStep: true);
      rec = service.getRecord(testDate);
      expect(rec.isDayStepCompleted, isTrue);
    });

    test('SyncreticSession can incorporate Triptych reading', () async {
      final triptych = WordOfTheDayService().getTriptychWordsForDate(DateTime(2026, 9, 28));

      final reading = SyncreticReading(
        id: 'trip_test_1',
        systemId: 'word_of_day',
        systemName: 'Триптих Дня',
        systemIcon: '⏳',
        timestamp: DateTime.now(),
        layoutTitle: 'Триптих Суток',
        items: [
          ReadingSignItem(
            title: 'Утро: ${triptych.morning.word}',
            linkedWord: triptych.morning,
          ),
          ReadingSignItem(
            title: 'День: ${triptych.day.word}',
            linkedWord: triptych.day,
          ),
          ReadingSignItem(
            title: 'Вечер: ${triptych.evening.word}',
            linkedWord: triptych.evening,
          ),
        ],
      );

      final repo = WordsRepository();
      await repo.addReadingToSyncreticSession(reading);

      final current = repo.currentSyncreticSession;
      expect(current.readings.any((r) => r.id == 'trip_test_1'), isTrue);
      expect(current.readings.firstWhere((r) => r.id == 'trip_test_1').items.length, 3);
    });
  });
}