// Database Connection Module - MySQL
import mysql from 'mysql2/promise';
import dotenv from 'dotenv';

dotenv.config();

// Create connection pool
const pool = mysql.createPool({
  host: process.env.DB_HOST || 'localhost',
  user: process.env.DB_USER || 'root',
  password: process.env.DB_PASSWORD || '',
  database: process.env.DB_NAME || 'sarpras',
  waitForConnections: true,
  connectionLimit: 10,
  queueLimit: 0,
  enableKeepAlive: true,
  keepAliveInitialDelay: 0
});

// Test connection
export const testConnection = async () => {
  try {
    const connection = await pool.getConnection();
    console.log('✅ Database connected successfully');
    connection.release();
    return true;
  } catch (error) {
    console.error('❌ Database connection failed:', error.message);
    return false;
  }
};

// Helper: Generate UUID
export const generateId = () => {
  return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
    const r = Math.random() * 16 | 0;
    const v = c === 'x' ? r : (r & 0x3 | 0x8);
    return v.toString(16);
  });
};

export default pool;