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

import 'package:drift/drift.dart';
import 'package:drift_postgres/drift_postgres.dart';
import '../converters.dart' show generateUuid, JsonListConverter, StringListConverter;
import 'users.dart';

/// Таблица PromoCodesCampaigns - кампании промокодов
class PromoCodesCampaigns 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 template => text()();
  TextColumn get name => text().nullable()();
  
  // Продукты (JSON array)
  TextColumn get products => text()
      .withDefault(const Constant('[]'))
      .map(const JsonListConverter())();
  
  IntColumn get activationsPerCode => integer()();
  IntColumn get activationsPerUser => integer()();
  IntColumn get generationSize => integer()();
  
  Column<PgDateTime> get start => customType(PgTypes.timestampWithTimezone)();
  Column<PgDateTime> get finish => customType(PgTypes.timestampWithTimezone)();
  
  // Статус (enum as string)
  TextColumn get status => text()();  // created, preparing, ready, active, disabled
  
  // Теги (JSON array)
  TextColumn get tags => text()
      .withDefault(const Constant('[]'))
      .map(const StringListConverter())();
  
  // Audit
  Column<PgDateTime> get createdAt => customType(PgTypes.timestampWithTimezone)
      .withDefault(now())();
  Column<PgDateTime> get updatedAt => customType(PgTypes.timestampWithTimezone)
      .withDefault(now())();
  BoolColumn get isDeleted => boolean()
      .customConstraint('NOT NULL DEFAULT FALSE')();
       // PostgreSQL использует нативный BOOLEAN
  Column<PgDateTime> get deletedAt => customType(PgTypes.timestampWithTimezone)
      .nullable()();
  
  @override
  Set<Column> get primaryKey => {id};
}

/// Таблица PromoCodes - промокоды
class PromoCodes 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 campaignId => text()
      .references(PromoCodesCampaigns, #id, onDelete: KeyAction.cascade)();
  
  TextColumn get code => text().unique()();
  IntColumn get activations => integer().withDefault(const Constant(0))();
  
  // Индивидуальный промокод (связан с пользователем)
  TextColumn get userId => text()
      .nullable()
      .references(Users, #id, onDelete: KeyAction.cascade)();
  
  // Audit
  Column<PgDateTime> get createdAt => customType(PgTypes.timestampWithTimezone)
      .withDefault(now())();
  Column<PgDateTime> get updatedAt => customType(PgTypes.timestampWithTimezone)
      .withDefault(now())();
  BoolColumn get isDeleted => boolean()
      .customConstraint('NOT NULL DEFAULT FALSE')();
      
  Column<PgDateTime> get deletedAt => customType(PgTypes.timestampWithTimezone)
      .nullable()();
  
  @override
  Set<Column> get primaryKey => {id};
}

// Конвертеры импортированы из converters.dart