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