mnemo_cards/mnemo_cards_backend/lib/database/tables/achievements.dart

import 'package:drift/drift.dart';
import 'package:drift_postgres/drift_postgres.dart';
import 'users.dart';

/// Таблица UserAchievements - достижения пользователей
class UserAchievements extends Table {
  // ID как String, но фактически UUID (генерируется PostgreSQL на стороне БД)
  TextColumn get id =>
      text().withDefault(const CustomExpression('gen_random_uuid()::text'))();

  TextColumn get userId =>
      text().references(Users, #id, onDelete: KeyAction.cascade)();

  // Achievement ID (from AchievementDefinitions)
  TextColumn get achievementId => text()();

  // When achievement was unlocked
  Column<PgDateTime> get unlockedAt =>
      customType(PgTypes.timestampWithTimezone).withDefault(now())();

  // Progress (0.0 to 1.0)
  RealColumn get progress => real().withDefault(const Constant(1.0))();

  // Audit
  Column<PgDateTime> get createdAt =>
      customType(PgTypes.timestampWithTimezone).withDefault(now())();
  Column<PgDateTime> get updatedAt =>
      customType(PgTypes.timestampWithTimezone).withDefault(now())();

  @override
  Set<Column> get primaryKey => {id};

  @override
  List<String> get customConstraints => ['UNIQUE(user_id, achievement_id)'];
}

// Конвертеры импортированы из converters.dart