import { NestFactory } from '@nestjs/core';
import * as bcrypt from 'bcrypt';
import { AppModule } from './app.module';
import { UsersService } from './users/users.service';
import { UserRole } from './common/enums';

/**
 * Seed script — creates the initial super admin user.
 * 
 * Usage:
 *   npx ts-node -r tsconfig-paths/register src/seed.ts
 * 
 * Or via npm script:
 *   npm run seed
 * 
 * Environment variables (or defaults):
 *   ADMIN_EMAIL=test@example.com
 *   ADMIN_PASSWORD=Admin123!
 */
async function bootstrap() {
  const app = await NestFactory.createApplicationContext(AppModule);
  const usersService = app.get(UsersService);

  const email = process.env.ADMIN_EMAIL || 'test@example.com';
  const password = process.env.ADMIN_PASSWORD || 'Admin123!';

  const existing = await usersService.findByEmail(email);
  if (existing) {
    console.log(`⚠️  Admin user already exists: ${email} (role: ${existing.role})`);
    if (existing.role !== UserRole.ADMIN) {
      await usersService.update(existing.id, { role: UserRole.ADMIN });
      console.log(`✅ Promoted ${email} to admin`);
    }
  } else {
    const hashedPassword = await bcrypt.hash(password, 12);
    await usersService.create({
      email,
      password: hashedPassword,
      firstName: 'Super',
      lastName: 'Admin',
      role: UserRole.ADMIN,
    });
    console.log(`✅ Admin user created: ${email}`);
  }

  console.log(`\n📋 Admin credentials:`);
  console.log(`   Email:    ${email}`);
  console.log(`   Password: ${password}`);

  await app.close();
}

bootstrap().catch((err) => {
  console.error('❌ Seed failed:', err);
  process.exit(1);
});