/**
 * Database Initialization Script
 * Run: npm run init-db
 * Creates the required MySQL database and tables.
 */
require('dotenv').config();
const mysql = require('mysql2/promise');

async function initDatabase() {
  const connection = await mysql.createConnection({
    host: process.env.MYSQL_HOST || 'localhost',
    port: parseInt(process.env.MYSQL_PORT) || 3306,
    user: process.env.MYSQL_USER || 'root',
    password: process.env.MYSQL_PASSWORD || ''
  });

  const dbName = process.env.MYSQL_DATABASE || 'display_wall';

  console.log('🔧 Initializing database...\n');

  // Create database
  await connection.query(`CREATE DATABASE IF NOT EXISTS \`${dbName}\` CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci`);
  console.log(`  ✅ Database "${dbName}" ready`);

  await connection.query(`USE \`${dbName}\``);

  // Create prometheus_sources table
  await connection.query(`
    CREATE TABLE IF NOT EXISTS prometheus_sources (
      id INT AUTO_INCREMENT PRIMARY KEY,
      name VARCHAR(255) NOT NULL,
      url VARCHAR(500) NOT NULL,
      description TEXT DEFAULT '',
      created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
      updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci
  `);
  console.log('  ✅ Table "prometheus_sources" ready');

  console.log('\n🎉 Database initialization complete!\n');
  await connection.end();
}

initDatabase().catch(err => {
  console.error('❌ Database initialization failed:', err.message);
  process.exit(1);
});