import 'package:drift/drift.dart';
import '../converters.dart' show generateUuid, JsonMapConverter;
import '../postgres_constants.dart';
import 'packs.dart';

/// Таблица Tests - тесты
class Tests extends Table {
  TextColumn get id => text().withDefault(const Constant('gen_random_uuid()'))();
  
  TextColumn get name => text()();
  TextColumn get color => text().nullable()();
  TextColumn get cover => text().nullable()();
  TextColumn get version => text().nullable()();
  TextColumn get time => text().nullable()();
  TextColumn get timeSubtitle => text().nullable()();
  
  // Audit
  DateTimeColumn get createdAt => dateTime().withDefault(currentTimestamp)();
  DateTimeColumn get updatedAt => dateTime().withDefault(currentTimestamp)();
  BoolColumn get isDeleted => boolean().withDefault(const Constant(false))();
  
  @override
  Set<Column> get primaryKey => {id};
}

/// Таблица TestQuestions - вопросы тестов
class TestQuestions extends Table {
  TextColumn get id => text().withDefault(const Constant('gen_random_uuid()'))();
  TextColumn get testId => text().references(Tests, #id, onDelete: KeyAction.cascade)();
  
  // Тип вопроса (enum as string)
  TextColumn get questionType => text()();
  TextColumn get body => text()();
  
  // Audit
  DateTimeColumn get createdAt => dateTime().withDefault(currentTimestamp)();
  DateTimeColumn get updatedAt => dateTime().withDefault(currentTimestamp)();
  
  @override
  Set<Column> get primaryKey => {id};
}

/// Таблица TestPackRelations - связь Tests с CardPacks (many-to-many)
class TestPackRelations extends Table {
  TextColumn get testId => text().references(Tests, #id, onDelete: KeyAction.cascade)();
  TextColumn get packId => text().references(CardPacks, #id, onDelete: KeyAction.cascade)();
  
  @override
  Set<Column> get primaryKey => {testId, packId};
}

/// Таблица TestStatistics - статистика прохождения тестов
class TestStatistics extends Table {
  TextColumn get id => text().withDefault(const Constant('gen_random_uuid()'))();
  TextColumn get userId => text()();  // Reference to Users, but not FK to avoid circular deps
  TextColumn get testId => text().references(Tests, #id, onDelete: KeyAction.cascade)();
  
  // Результаты (JSON)
  TextColumn get results => text()
      .withDefault(const Constant('{}'))
      .map(const JsonMapConverter())();
  
  DateTimeColumn get completedAt => dateTime().withDefault(currentTimestamp)();
  
  // Audit
  DateTimeColumn get createdAt => dateTime().withDefault(currentTimestamp)();
  DateTimeColumn get updatedAt => dateTime().withDefault(currentTimestamp)();
  
  @override
  Set<Column> get primaryKey => {id};
}

// Конвертеры импортированы из converters.dart