import bcrypt from 'bcryptjs';
import mysql from 'mysql2/promise';
import dotenv from 'dotenv';

dotenv.config();

async function seedAdmin() {
  let connection;
  
  try {
    // Connect to database (use root for seeding)
    connection = await mysql.createConnection({
      host: process.env.DB_HOST || 'localhost',
      user: 'root',
      password: 'rootpassword',
      database: process.env.DB_NAME || 'work_allocation',
      port: process.env.DB_PORT || 3306
    });

    console.log('✅ Connected to database');

    // Check if admin already exists
    const [existingUsers] = await connection.query(
      'SELECT id FROM users WHERE username = ?',
      ['admin']
    );

    if (existingUsers.length > 0) {
      console.log('ℹ️  Admin user already exists, updating password...');
      
      // Generate new password hash
      const passwordHash = await bcrypt.hash('admin123', 10);
      
      // Update existing admin user
      await connection.query(
        'UPDATE users SET password = ? WHERE username = ?',
        [passwordHash, 'admin']
      );
      
      console.log('✅ Admin password updated successfully');
    } else {
      console.log('📝 Creating admin user...');
      
      // Generate password hash
      const passwordHash = await bcrypt.hash('admin123', 10);
      
      // Insert admin user
      await connection.query(
        'INSERT INTO users (username, name, email, password, role) VALUES (?, ?, ?, ?, ?)',
        ['admin', 'Super Admin', 'admin@workallocate.com', passwordHash, 'SuperAdmin']
      );
      
      console.log('✅ Admin user created successfully');
    }

    console.log('');
    console.log('🔑 Default Login Credentials:');
    console.log('   Username: admin');
    console.log('   Password: admin123');
    console.log('');

  } catch (error) {
    console.error('❌ Error seeding admin user:', error.message);
    process.exit(1);
  } finally {
    if (connection) {
      await connection.end();
    }
  }
}

seedAdmin();