import { Injectable } from '@nestjs/common';
import Mailgun from 'mailgun.js';
import * as formdata from 'form-data';
import { IMailgunClient } from 'mailgun.js/Interfaces';
import { ConfigService } from '@nestjs/config';

@Injectable()
export class EmailService {
  private readonly mailgun: IMailgunClient | undefined;
  private static readonly emailFromDomain = 'hello.hooli.co';

  constructor(private readonly configService: ConfigService) {
    const mailgun = new Mailgun(formdata);
    const hooliKey = this.configService.get<string>('mailgun.hooliKey');
    if (!hooliKey) {
      return;
    }
    this.mailgun = mailgun.client({
      username: 'api',
      key: hooliKey,
    });
  }

  async sendEmail(to: string[], subject: string, text: string) {
    if (!this.mailgun) {
      return;
    }
    return this.mailgun.messages.create(EmailService.emailFromDomain, {
      from: `HooliMail <hooli-mail@${EmailService.emailFromDomain}>`,
      to,
      subject,
      text,
      html: text,
    });
  }
}