const { default: axios } = require('axios')
const encrypt = require('./crypto')
const { APP_CONF } = require('./config.json')

const generateNonce = () => {
  let nonce = ''
  for (let i = 0; i < 16; i++) {
    nonce += Math.floor(Math.random() * 10).toString()
  }
  return nonce
}

const getXeapiPublicKey = async (currentPublicKey = {}, deviceId = '') => {
  const nonce = generateNonce()
  const timestamp = String(Date.now())
  const data = {
    appVersion: '9.1.65',
    currentKeyVersion: currentPublicKey.version || '',
    deviceId,
    nonce,
    os: 'android',
    requestType: 'active',
    signature: encrypt.xeapiSign(timestamp, nonce),
    t1: '',
    t2: '',
    timestamp,
    uid: '',
  }
  const res = await axios({
    method: 'POST',
    url: APP_CONF.apiDomain + '/api/gorilla/anti/crawler/security/key/get',
    headers: {
      'User-Agent':
        'NeteaseMusic/9.1.65.240927161425(9001065);Dalvik/2.1.0 (Linux; U; Android 14; 23013RK75C Build/UKQ1.230804.001)',
      Cookie: deviceId ? `deviceId=${encodeURIComponent(deviceId)}` : '',
    },
    data: new URLSearchParams(data).toString(),
    proxy: false,
  })
  if (
    !res.data ||
    res.data.code !== 200 ||
    !res.data.data ||
    !res.data.data.encryptedData
  ) {
    throw new Error('xeapi public key request failed')
  }
  if (
    !res.data.data.signature ||
    encrypt.xeapiSign(res.data.data.timestamp, nonce) !==
      res.data.data.signature
  ) {
    throw new Error('xeapi public key response signature mismatch')
  }

  const publicKey = encrypt.xeapiDecryptPublicKey(res.data.data.encryptedData)
  if (!publicKey.sk && currentPublicKey.sk) {
    publicKey.sk = currentPublicKey.sk
  }
  if (!publicKey.sk) {
    throw new Error('xeapi public key response missing sk')
  }
  return publicKey
}

module.exports = {
  getXeapiPublicKey,
}