import * as nodemailer from 'nodemailer';
import * as handlebars from 'handlebars';
import * as path from 'path';
import * as fs from 'fs';
import { TransactionPaymentType } from 'src/modules/transaction/transaction/constants';

export async function sendEmail(receivers, subject) {
  const smtpTransport = nodemailer.createTransport({
    host: process.env.EMAIL_HOST,
    port: process.env.EMAIL_POST,
    auth: {
      user: process.env.EMAIL_USER,
      pass: process.env.EMAIL_TOKEN,
    },
  });
  let templateName = 'payment-confirmation-bank';

  for (const receiver of receivers) {
    try {
      if (receiver.payment_type == TransactionPaymentType.MIDTRANS)
        templateName = 'payment-confirmation-midtrans';

      let templatePath = path.join(
        __dirname,
        `../email-template/${templateName}.html`,
      );
      templatePath = templatePath.replace(/dist/g, 'src');
      const templateSource = fs.readFileSync(templatePath, 'utf8');

      const template = handlebars.compile(templateSource);
      const htmlToSend = template(receiver);

      const emailContext = {
        from: process.env.EMAIL_SENDER ?? 'no-reply@weplayground.app',
        to: receiver.email,
        subject: subject,
        html: htmlToSend,
        attachDataUrls: true,
      };

      await new Promise((f) => setTimeout(f, 2000));

      smtpTransport.sendMail(emailContext, function (err, data) {
        if (err) {
          console.log(err, `Error occurs on send to ${receiver.email}`);
        } else {
          console.log(`Email sent to ${receiver.email}`);
        }
      });
    } catch (error) {
      console.log(error, `Error occurs on send to ${receiver.email}`);
    }
  }
}