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

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

/// Таблица Tasks - задачи системы
class Tasks 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 name => text()();
  IntColumn get minCycleMillis => integer()();
  IntColumn get maxCycleMillis => integer()();
  IntColumn get intervalMillis => integer()();
  IntColumn get timeoutMillis => integer()();
  
  TextColumn get status => text().nullable()();
  TextColumn get description => text().nullable()();
  Column<PgDateTime> get lastExecution => customType(PgTypes.timestampWithTimezone)
      .nullable()();
  
  // 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};
}

/// Таблица UserTasks - задачи пользователей
class UserTasks 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 title => text()();
  TextColumn get description => text()();
  TextColumn get type => text()();  // app_internal, external, social
  TextColumn get difficulty => text()();  // easy, medium, hard
  TextColumn get status => text()();  // available, in_progress, completed, expired, failed
  
  // Награды (JSON array)
  TextColumn get rewards => text()
      .withDefault(const Constant('[]'))
      .map(const JsonListConverter())();
  
  Column<PgDateTime> get createdAt => customType(PgTypes.timestampWithTimezone)
      .withDefault(now())();
  Column<PgDateTime> get expiresAt => customType(PgTypes.timestampWithTimezone)();
  Column<PgDateTime> get completedAt => customType(PgTypes.timestampWithTimezone)
      .nullable()();
  
  TextColumn get proofUrl => text().nullable()();
  TextColumn get instructions => text().nullable()();
  
  // Теги (JSON array)
  TextColumn get tags => text()
      .withDefault(const Constant('[]'))
      .map(const StringListConverter())();
  
  TextColumn get imageUrl => text().nullable()();
  
  // Audit
  Column<PgDateTime> get updatedAt => customType(PgTypes.timestampWithTimezone)
      .withDefault(now())();
  
  @override
  Set<Column> get primaryKey => {id};
}

/// Таблица UserTaskProgresses - прогресс выполнения задач пользователями
class UserTaskProgresses 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)();
  TextColumn get taskId => text()();  // Reference to UserTasks, but not FK to avoid circular deps

  // Прогресс (JSON)
  TextColumn get progress => text()
      .withDefault(const Constant('{}'))
      .map(const JsonMapConverter())();

  Column<PgDateTime> get startedAt => customType(PgTypes.timestampWithTimezone)
      .withDefault(now())();
  Column<PgDateTime> get updatedAt => customType(PgTypes.timestampWithTimezone)
      .withDefault(now())();
  
  @override
  Set<Column> get primaryKey => {id};
}

/// Таблица UserTaskResults - результаты выполнения задач
class UserTaskResults 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)();
  TextColumn get taskId => text()();  // Reference to UserTasks
  
  // Результаты (JSON)
  TextColumn get results => text()
      .withDefault(const Constant('{}'))
      .map(const JsonMapConverter())();
  
  Column<PgDateTime> get completedAt => customType(PgTypes.timestampWithTimezone)
      .withDefault(now())();
  
  // Audit
  Column<PgDateTime> get createdAt => customType(PgTypes.timestampWithTimezone)
      .withDefault(now())();
  
  @override
  Set<Column> get primaryKey => {id};
}

// Конвертеры импортированы из converters.dart