const mysql = require('mysql2/promise');

class Database {
  constructor() {
    this.pool = null;
  }

  async connect() {
    try {
      this.pool = mysql.createPool({
        host: 'localhost',
        port: 3306,
        user: 'root',
        password: 'Admin@123',
        database: 'dubai_dld',
        waitForConnections: true,
        connectionLimit: 10,
        queueLimit: 0
      });

      // Test connection
      const connection = await this.pool.getConnection();
      console.log('✅ Database connected successfully');
      connection.release();
      
      return this.pool;
    } catch (error) {
      console.error('❌ Database connection failed:', error.message);
      throw error;
    }
  }

  async query(sql, params = []) {
    try {
      if (!this.pool) {
        await this.connect();
      }
      
      const [rows] = await this.pool.execute(sql, params);
      return rows;
    } catch (error) {
      console.error('Database query error:', error.message);
      throw error;
    }
  }

  async close() {
    if (this.pool) {
      await this.pool.end();
      console.log('Database connection closed');
    }
  }
}

module.exports = new Database();