import { Injectable } from '@nestjs/common';
import { ConfigService } from '@nestjs/config';
import { MailerService } from '@nestjs-modules/mailer';
import { render } from '@react-email/components';

import { ProcessEnv } from '@/src/shared/types/env';
import { SessionInfo } from '@/src/shared/types/session-metadata.types';
import { Token } from '@prisma/generated';

import {
  EnableTwoFactorTemplate, VerifyChannelTemplate, VerificationTemplate, PasswordRecoveryTemplate, DeactivateTemplate, AccountDeletionTemplate,
} from './templates';

@Injectable()
export class MailService {
  constructor(
    private readonly configService: ConfigService<ProcessEnv>,
    private readonly mailerService: MailerService,
  ) {}

  public async sendVerificationToken(email: string, token: Token['token']) {
    const domain = this.configService.getOrThrow<string>('ALLOWED_ORIGIN');
    const html = await render(VerificationTemplate({ domain, token }));

    void this.sendMail(email, 'Верификация аккаунта', html);
  }

  public async sendPasswordResetToken(email: string, token: Token['token'], metadata: SessionInfo) {
    const domain = this.configService.getOrThrow<string>('ALLOWED_ORIGIN');
    const html = await render(PasswordRecoveryTemplate({ domain, token, metadata }));

    void this.sendMail(email, 'Сброс пароля', html);
  }

  public async sendDeactivateToken(email: string, token: Token['token'], metadata: SessionInfo) {
    const html = await render(DeactivateTemplate({ token, metadata }));

    void this.sendMail(email, 'Деактивация аккаунта', html);
  }

  public async sendAccountDeletion(email: string) {
    const domain = this.configService.getOrThrow<string>('ALLOWED_ORIGIN');
    const html = await render(AccountDeletionTemplate({ domain }));

    void this.sendMail(email, 'Удаление аккаунта', html);
  }

  public async sendEnableTwoFactor(email: string) {
    const domain = this.configService.getOrThrow<string>('ALLOWED_ORIGIN');
    const html = await render(EnableTwoFactorTemplate({ domain }));

    void this.sendMail(email, 'Обеспечьте свою безопасность', html);
  }

  public async sendVerifyChannel(email: string) {
    const html = await render(VerifyChannelTemplate());

    void this.sendMail(email, 'Ваш канал верифицирован', html);
  }

  private async sendMail(email: string, subject: string, html: string) {
    return this.mailerService.sendMail({
      to: email,
      subject,
      html,
    });
  }
}