const MAILPIT_URL = 'http://127.0.0.1:54324'

interface MailpitAddress {
  Address: string
  Name: string
}

interface MailpitMessage {
  ID: string
  To: MailpitAddress[]
  Subject: string
  Date: string
}

interface MailpitListResponse {
  messages: MailpitMessage[] | null
  total: number
}

interface MailpitMessageDetail {
  Text: string
  HTML: string
}

export async function deleteAllMail(): Promise<void> {
  await fetch(`${MAILPIT_URL}/api/v1/messages`, { method: 'DELETE' })
}

export async function getMagicLink(toEmail: string, timeoutMs = 15_000): Promise<string> {
  const deadline = Date.now() + timeoutMs

  while (Date.now() < deadline) {
    const res = await fetch(`${MAILPIT_URL}/api/v1/messages`)
    if (res.ok) {
      const data: MailpitListResponse = await res.json()
      const msg = (data.messages ?? []).find(m =>
        m.To.some(t => t.Address === toEmail),
      )
      if (msg) {
        const detail: MailpitMessageDetail = await fetch(
          `${MAILPIT_URL}/api/v1/message/${msg.ID}`,
        ).then(r => r.json())

        const body = detail.Text || detail.HTML
        // Supabase local auth confirmation URL
        const match = body.match(/https?:\/\/127\.0\.0\.1:54321\/auth\/v1\/verify\?[^\s"<]+/)
        if (match) return match[0]
      }
    }
    await new Promise(r => setTimeout(r, 500))
  }

  throw new Error(`No magic link email for ${toEmail} within ${timeoutMs}ms`)
}