import 'package:mnemo_cards_backend/cron/task.dart' as cron_task;
import 'package:mnemo_cards_backend/database/database.dart';
import 'package:mnemo_cards_backend/tests/test_manager.dart';
import 'package:mnemo_cards_common_backend/mnemo_cards_common_backend.dart';

class TestGeneratorTask with cron_task.Task {
  final TestManager _testManager;
  final AppDatabase _db;

  TestGeneratorTask(this._testManager, this._db);

  @override
  String get name => 'test_gen';

  @override
  Future<void> task() async {
    print('Refreshing custom test data...');
    try {
      await _testManager.refreshCustomCreationTestsData();
    } catch (e) {
      print(e);
    }
    print('Refreshed custom test data');
    final packs = await _db.packDao.getAllPacks();
    print('Will generate tests for ${packs.length} packs');
    int ok = 0;
    for (final pack in packs) {
      try {
        // Convert CardPack to CardPackModel for updateGeneratedTests
        final packModel = CardPackModel(
          id: pack.id,
          title: pack.title,
          subtitle: pack.subtitle,
          description: pack.description,
          color: pack.color,
          cover: pack.cover,
          size: pack.size,
          version: pack.version,
          order: pack.order,
          enabled: pack.enabled,
          cardsOrder: pack.cardsOrder,
          googlePlayId: pack.googlePlayId,
          rustoreId: pack.rustoreId,
          appStoreId: pack.appStoreId,
          price: pack.price,
          currency: pack.currency,
        );
        await _testManager.updateGeneratedTests(packModel);
        ok++;
      } catch (e) {
        print(e);
      }
    }
    print('Generated tests for $ok packs');
    print('Purging old generated tests (hard delete TTL)...');
    try {
      final orphanDeleted = await _db.testDao.hardDeleteOrphanGeneratedTests(
        olderThan: const Duration(hours: 1),
      );
      print('purged $orphanDeleted orphan generated tests');

      final deleted = await _db.testDao.hardDeleteOldSoftDeletedGeneratedTests(
        olderThan: const Duration(days: 7),
      );
      print('purged $deleted old generated tests');
    } catch (e) {
      print('failed to purge old generated tests: $e');
    }
    print('Deleting old test stats');
    // Delete test statistics where test doesn't exist (test was deleted)
    final allTests = await _db.testDao.getAllTests();
    final testIds = allTests.map((t) => t.id).toSet();
    if (testIds.isEmpty) {
      // If no tests exist, delete all statistics
      final count = await (_db.delete(_db.testStatistics)).go();
      print('deleted $count old test stats');
      return;
    }
    // Get all statistics and filter in memory (more efficient for small datasets)
    final allStats = await (_db.select(_db.testStatistics)).get();
    final statsToDelete = allStats.where((stat) => !testIds.contains(stat.testId)).toList();
    int count = 0;
    for (final stat in statsToDelete) {
      await (_db.delete(_db.testStatistics)..where((ts) => ts.id.equals(stat.id))).go();
      count++;
    }
    print('deleted $count old test stats');
  }

  @override
  int get intervalSeconds => 60 * 30;
}