import { Global, Module } from '@nestjs/common';
import { ConfigService } from '@nestjs/config';
import { MAIL_PROVIDER } from './mail-provider';
import { LogMailProvider } from './log-mail.provider';
import { SmtpMailProvider } from './smtp-mail.provider';
import { MailService } from './mail.service';

/// Global so any feature module can inject MailService. Provider defaults to
/// log-only; MAIL_PROVIDER=smtp switches to a real SMTP transport.
@Global()
@Module({
  providers: [
    MailService,
    {
      provide: MAIL_PROVIDER,
      inject: [ConfigService],
      useFactory: (config: ConfigService) =>
        config.get<string>('MAIL_PROVIDER') === 'smtp'
          ? new SmtpMailProvider(config)
          : new LogMailProvider(),
    },
  ],
  exports: [MailService],
})
export class MailModule {}