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

import 'package:drift/drift.dart';
import 'users.dart';
import '../converters.dart' show generateUuid;

/// Таблица StudySessions - сессии изучения
class StudySessions extends Table {
  TextColumn get id => text().withDefault(const Constant('gen_random_uuid()'))();
  TextColumn get userId => text().references(Users, #id, onDelete: KeyAction.cascade)();
  
  TextColumn get sessionId => text().nullable().unique()();
  
  DateTimeColumn get startTime => dateTime()();
  DateTimeColumn get endTime => dateTime().nullable()();
  
  IntColumn get wordsLearned => integer().withDefault(const Constant(0))();
  IntColumn get testsCompleted => integer().withDefault(const Constant(0))();
  RealColumn get accuracy => real().withDefault(const Constant(0.0))();
  
  TextColumn get packId => text().nullable()();
  TextColumn get testId => text().nullable()();
  
  // Audit
  DateTimeColumn get createdAt => dateTime().withDefault(currentDateAndTime)();
  DateTimeColumn get updatedAt => dateTime().withDefault(currentDateAndTime)();
  
  @override
  Set<Column> get primaryKey => {id};
}