import 'package:drift/drift.dart';
import 'package:drift_postgres/drift_postgres.dart';
import '../converters.dart';

/// Таблица Users - основная информация о пользователях
class Users 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 externalUserId => text().unique()();
  TextColumn get name => text().nullable()();
  TextColumn get email => text().nullable()();
  BoolColumn get admin => boolean()
      .withDefault(const Constant(false))
      .customConstraint('')(); // PostgreSQL использует нативный BOOLEAN
  
  // UserSettings (JSON)
  TextColumn get userSettings => text().nullable()();
  
  // Purchases (JSON array)
  TextColumn get purchases => text()
      .withDefault(const Constant('[]'))
      .map(const StringListConverter())();
  
  // Audit fields
  Column<PgDateTime> get createdAt => customType(PgTypes.timestampWithTimezone)
      .withDefault(now())();
  Column<PgDateTime> get updatedAt => customType(PgTypes.timestampWithTimezone)
      .withDefault(now())();
  BoolColumn get isDeleted => boolean()
      .withDefault(const Constant(false))
      .customConstraint('')(); // PostgreSQL использует нативный BOOLEAN
  
  @override
  Set<Column> get primaryKey => {id};
  
  @override
  List<String> get customConstraints => [
    'CONSTRAINT valid_email CHECK (email IS NULL OR email LIKE \'%@%\')',
  ];
}

/// Таблица UserDatas - расширенная информация о пользователе
class UserDatas 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()
      .unique()
      .references(Users, #id, onDelete: KeyAction.cascade)();
  
  // Статистика
  IntColumn get totalStudyTimeMinutes => integer().withDefault(const Constant(0))();
  IntColumn get currentStreak => integer().withDefault(const Constant(0))();
  IntColumn get longestStreak => integer().withDefault(const Constant(0))();
  IntColumn get totalCards => integer().withDefault(const Constant(0))();
  IntColumn get totalTests => integer().withDefault(const Constant(0))();
  
  // Временные метки
  Column<PgDateTime> get lastTimeOnline => customType(PgTypes.timestampWithTimezone)
      .nullable()();
  Column<PgDateTime> get registrationDate => customType(PgTypes.timestampWithTimezone)
      .withDefault(now())();
  TextColumn get lastTestSessionToken => text().nullable()();
  
  // Сложные структуры (JSON)
  TextColumn get words => text()
      .withDefault(const Constant('[]'))
      .map(const JsonListConverter())();
  
  TextColumn get tags => text()
      .withDefault(const Constant('[]'))
      .map(const StringListConverter())();
  
  TextColumn get packProgress => text()
      .withDefault(const Constant('[]'))
      .map(const JsonListConverter())();
  
  TextColumn get studyDates => text()
      .withDefault(const Constant('[]'))
      .map(const DateTimeListConverter())();
  
  TextColumn get achievements => text()
      .withDefault(const Constant('[]'))
      .map(const JsonListConverter())();
  
  TextColumn get categoryMinutes => text()
      .withDefault(const Constant('{}'))
      .map(const JsonMapConverter())();
  
  // 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};
}

// Конвертеры импортированы из converters.dart