interface SendEmailParams {
  to: string
  subject: string
  html: string
}

async function sendEmail({ to, subject, html }: SendEmailParams): Promise<void> {
  const apiKey = process.env.BREVO_API_KEY
  if (!apiKey) throw new Error('BREVO_API_KEY not configured')

  const from = process.env.BREVO_FROM_EMAIL ?? 'noreply@setia.com.my'

  const res = await fetch('https://api.brevo.com/v3/smtp/email', {
    method: 'POST',
    headers: {
      'api-key': apiKey,
      'Content-Type': 'application/json',
    },
    body: JSON.stringify({
      sender: { email: from },
      to: [{ email: to }],
      subject,
      htmlContent: html,
    }),
  })

  if (!res.ok) {
    const text = await res.text()
    throw new Error(`Brevo API error ${res.status}: ${text}`)
  }
}

export async function sendPasswordResetEmail({
  to,
  name,
  resetLink,
}: {
  to: string
  name: string
  resetLink: string
}): Promise<void> {
  await sendEmail({
    to,
    subject: 'IMS — Reset your password',
    html: `
      <p>Hi ${name},</p>
      <p>Click the link below to reset your IMS password. The link expires in 1 hour.</p>
      <p><a href="${resetLink}">${resetLink}</a></p>
      <p>If you did not request a password reset, ignore this email.</p>
    `,
  })
}