import 'package:sqflite/sqflite.dart';
import 'package:path/path.dart';

class LocalDatabase {
  static final LocalDatabase _instance = LocalDatabase._internal();
  factory LocalDatabase() => _instance;
  LocalDatabase._internal();

  static Database? _database;

  Future<Database> get database async {
    if (_database != null) return _database!;
    _database = await _initDB();
    return _database!;
  }

  Future<Database> _initDB() async {
    final dbPath = await getDatabasesPath();
    final path = join(dbPath, 'app_database.db');

    return await openDatabase(
      path,
      version: 1,
      onCreate: (db, version) async {
        /// CITY TABLE
        await db.execute('''
          CREATE TABLE selected_city (
            id INTEGER PRIMARY KEY,
            city_id INTEGER
          )
        ''');

        /// ONBOARDING TABLE
        await db.execute('''
          CREATE TABLE onboarding_state (
            id INTEGER PRIMARY KEY,
            is_first_time INTEGER NOT NULL,
            page INTEGER NOT NULL
          )
        ''');
      },
    );
  }
}