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

// Database configuration - you should update these with your actual database credentials
const dbConfig = {
  host: process.env.DB_HOST || 'localhost',
  port: process.env.DB_PORT || 3306,
  user: process.env.DB_USER || 'root',
  password: process.env.DB_PASSWORD || '',
  database: process.env.DB_NAME || 'corrad_af_2024',
  multipleStatements: true
};

async function runMigration() {
  let connection;
  
  try {
    console.log('🔄 Connecting to database...');
    connection = await mysql.createConnection(dbConfig);
    
    console.log('✅ Connected to database successfully');
    
    // Read the migration file
    const migrationPath = path.join(__dirname, '..', 'database', 'migrations', '004_create_notification_logs_table.sql');
    const migrationSQL = fs.readFileSync(migrationPath, 'utf8');
    
    console.log('📄 Running migration: 004_create_notification_logs_table.sql');
    
    // Execute the migration
    const [results] = await connection.execute(migrationSQL);
    
    console.log('✅ Migration completed successfully');
    console.log('🎉 Notification logs table created');
    
    // Optional: Check if the table was created
    const [tables] = await connection.execute('SHOW TABLES LIKE "notification_logs"');
    
    if (tables.length > 0) {
      console.log('✅ Table "notification_logs" confirmed to exist');
      
      // Show table structure
      const [columns] = await connection.execute('DESCRIBE notification_logs');
      console.log('📋 Table structure:');
      columns.forEach(col => {
        console.log(`  - ${col.Field}: ${col.Type} ${col.Null === 'YES' ? 'NULL' : 'NOT NULL'} ${col.Key ? `(${col.Key})` : ''}`);
      });
    } else {
      console.log('❌ Table "notification_logs" was not found');
    }
    
  } catch (error) {
    console.error('❌ Migration failed:', error.message);
    console.error('Stack trace:', error.stack);
    process.exit(1);
  } finally {
    if (connection) {
      await connection.end();
      console.log('🔌 Database connection closed');
    }
  }
}

// Run the migration
console.log('🚀 Starting database migration for notification logs...');
runMigration().then(() => {
  console.log('✅ Migration process completed successfully');
}).catch(error => {
  console.error('❌ Migration process failed:', error);
  process.exit(1);
});