const db = require('../models');

/**
 * Test database connection
 */
async function testConnection() {
  try {
    await db.sequelize.authenticate();
    console.log('✅ Database connection verified');
    return true;
  } catch (error) {
    console.error('❌ Database connection failed:', error.message);
    return false;
  }
}

/**
 * Sync all models with database
 * WARNING: Use with caution in production
 */
async function syncModels(options = {}) {
  try {
    await db.sequelize.sync(options);
    console.log('✅ Models synchronized with database');
    return true;
  } catch (error) {
    console.error('❌ Model synchronization failed:', error.message);
    return false;
  }
}

/**
 * Close database connection
 */
async function closeConnection() {
  try {
    await db.sequelize.close();
    console.log('✅ Database connection closed');
    return true;
  } catch (error) {
    console.error('❌ Failed to close database connection:', error.message);
    return false;
  }
}

/**
 * Get database statistics
 */
async function getDatabaseStats() {
  try {
    const [tables] = await db.sequelize.query('SHOW TABLES');
    const [version] = await db.sequelize.query('SELECT VERSION() as version');
    
    return {
      connected: true,
      version: version[0].version,
      tables: tables.length,
      database: db.sequelize.config.database
    };
  } catch (error) {
    return {
      connected: false,
      error: error.message
    };
  }
}

module.exports = {
  db,
  testConnection,
  syncModels,
  closeConnection,
  getDatabaseStats
};