const GODADDY_DNS_API = 'https://api.godaddy.com/v3/domains/zones'

export async function setGodaddyARecord({ pat, zone, name, address, ttl }) {
  const records = await listARecords({ pat, zone, name })
  if (records.length === 1 && records[0].data === address && records[0].ttl === ttl) {
    return { hostname: `${name}.${zone}`, action: 'kept', address }
  }

  for (const record of records) {
    await godaddyRequest({
      pat,
      method: 'DELETE',
      url: `${GODADDY_DNS_API}/${zone}/dns-records/${record.recordId}`,
      body: null,
    })
  }

  await godaddyRequest({
    pat,
    method: 'POST',
    url: `${GODADDY_DNS_API}/${zone}/dns-records`,
    body: { type: 'A', name, data: address, ttl },
  })

  let action = 'created'
  if (records.length > 0) action = 'replaced'
  return { hostname: `${name}.${zone}`, action, address }
}

async function listARecords({ pat, zone, name }) {
  const url = new URL(`${GODADDY_DNS_API}/${zone}/dns-records`)
  url.searchParams.set('type', 'A')
  url.searchParams.set('name', name)
  url.searchParams.set('pageSize', '100')
  const response = await godaddyRequest({ pat, method: 'GET', url: url.href, body: null })
  if (response === null || typeof response !== 'object' || !Array.isArray(response.items)) {
    throw new Error(`GoDaddy DNS 响应缺少 items: ${name}.${zone}`)
  }
  return response.items
}

async function godaddyRequest({ pat, method, url, body }) {
  const headers = { authorization: `Bearer ${pat}`, accept: 'application/json' }
  const request = { method, headers }
  if (body !== null) {
    headers['content-type'] = 'application/json'
    request.body = JSON.stringify(body)
  }

  const response = await fetch(url, request)
  const text = await response.text()
  if (!response.ok) {
    throw new Error(`GoDaddy ${method} ${url} 返回 ${response.status}: ${text}`)
  }
  if (text.length === 0) return null
  return JSON.parse(text)
}