import * as nodemailer from 'nodemailer'

interface Options {
  to: string | string[]
  subject: string
  html: string
  text: string
}

const transporter = nodemailer.createTransport({
  service: 'gmail',
  auth: {
    user: process.env.GMAIL,
    pass: process.env.GMAIL_SMTP_PASSWORD,
  },
})

export async function sendEmail({ to, subject, text, html }: Options) {
  return await transporter.sendMail({
    from: `"${process.env.NAME} (noreply)" <${process.env.GMAIL}>`,
    to: Array.isArray(to) ? to : [to],
    subject,
    text,
    html,
  })
}

export function censorEmail(email: string): string {
  const [localPart, domain] = email.split('@')

  if (localPart.length <= 2) return `${localPart}@${domain}`

  const firstChar = localPart[0]
  const lastChar = localPart[localPart.length - 1]
  const middleLength = Math.min(localPart.length - 2, 7)
  const middle = '#'.repeat(middleLength)

  return `${firstChar}${middle}${lastChar}@${domain}`
}