import nodemailer from 'nodemailer';
import config from '../config.js';

let transporter = null;

if (config.email.host) {
  transporter = nodemailer.createTransport({
    host: config.email.host,
    port: config.email.port,
    secure: config.email.secure,
    auth: config.email.user
      ? { user: config.email.user, pass: config.email.pass }
      : undefined,
  });
}

export async function sendVerificationEmail(to, link) {
  const subject = 'Verify your Fertig Classic Games account';
  const text = `Welcome! Confirm your email by visiting:\n\n${link}\n\nThis link expires in ${config.email.verificationTtlHours} hour(s).`;
  const html = `<p>Welcome!</p><p>Confirm your email by clicking the link below:</p><p><a href="${link}">${link}</a></p><p>This link expires in ${config.email.verificationTtlHours} hour(s).</p>`;

  if (!transporter) {
    console.log(`\n[mailer:dev] Verification link for ${to}:\n  ${link}\n`);
    return { delivered: false, devLogged: true };
  }

  try {
    await transporter.sendMail({
      from: config.email.from,
      to,
      subject,
      text,
      html,
    });
    return { delivered: true, devLogged: false };
  } catch (err) {
    console.error(`[mailer] Failed to send verification email to ${to}:`, err);
    return { delivered: false, devLogged: false, error: err.message };
  }
}