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

class DatabaseHelper {
  static final DatabaseHelper instance = DatabaseHelper._init();
  static Database? _database;

  DatabaseHelper._init();

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

  Future<Database> _initDB(String filePath) async {
    final dbPath = await getDatabasesPath();
    final path = join(dbPath, filePath);

    return openDatabase(
      path,
      version: 1,
      onCreate: _createDB,
    );
  }

  Future<void> _createDB(Database db, int version) async {
    await db.execute('''
      CREATE TABLE bookings (
        id INTEGER PRIMARY KEY AUTOINCREMENT,
        date TEXT NOT NULL,
        customer_name TEXT NOT NULL,
        marans INTEGER NOT NULL DEFAULT 0,
        araucana INTEGER NOT NULL DEFAULT 0,
        olive INTEGER NOT NULL DEFAULT 0,
        note TEXT NOT NULL DEFAULT ''
      )
    ''');
  }

  Future<List<Map<String, dynamic>>> getAllBookings() async {
    final db = await instance.database;
    return db.query(
      'bookings',
      orderBy: 'date ASC, customer_name ASC',
    );
  }

  Future<int> insertBooking(Map<String, dynamic> booking) async {
    final db = await instance.database;
    return db.insert('bookings', booking);
  }

  Future<int> updateBooking(Map<String, dynamic> booking) async {
    final db = await instance.database;
    return db.update(
      'bookings',
      booking,
      where: 'id = ?',
      whereArgs: [booking['id']],
    );
  }

  Future<int> deleteBooking(int id) async {
    final db = await instance.database;
    return db.delete(
      'bookings',
      where: 'id = ?',
      whereArgs: [id],
    );
  }

  Future<void> close() async {
    final db = await instance.database;
    db.close();
  }
}