import mailchimp from '@mailchimp/mailchimp_marketing'

if (process.env.BETTERSTART_MAILCHIMP_API_KEY && process.env.BETTERSTART_MAILCHIMP_SERVER_PREFIX) {
  mailchimp.setConfig({
    apiKey: process.env.BETTERSTART_MAILCHIMP_API_KEY,
    server: process.env.BETTERSTART_MAILCHIMP_SERVER_PREFIX
  })
}

/**
 * Add an email address to the Mailchimp audience (fire-and-forget, non-blocking)
 */
export function addToMailchimpAudience(email: string): void {
  if (
    !process.env.BETTERSTART_MAILCHIMP_API_KEY ||
    !process.env.BETTERSTART_MAILCHIMP_SERVER_PREFIX ||
    !process.env.BETTERSTART_MAILCHIMP_AUDIENCE_ID
  )
    return

  ;(async () => {
    try {
      await mailchimp.lists.addListMember(process.env.BETTERSTART_MAILCHIMP_AUDIENCE_ID!, {
        email_address: email,
        status: 'subscribed' as const,
        merge_fields: {}
      })
    } catch (error: unknown) {
      if (
        (error as { response?: { body?: { title?: string } } })?.response?.body?.title ===
        'Member Exists'
      )
        return
      console.error('Failed to add to Mailchimp audience:', error)
    }
  })()
}