/**
 * @name 咪咕音乐 - Koneko
 * @description 聚合音源插件: 官方搜索 + 多API音源容灾
 * @version 0.0.2
 * @author Miao-moe
 *
 * 环境变量:
 *   ceru_key - 聆澜API密钥（可选）
 */

'use strict'
var https = require('https')
var http = require('http')
var crypto = require('crypto')

var env = global.env || {}
var CERU_KEY = env.ceru_key || ''

var HEADERS_COMMON = {
  'User-Agent': 'Mozilla/5.0 (Linux; U; Android 11.0.0; zh-cn; MI 11 Build/OPR1.170623.032) AppleWebKit/534.30'
}

function mapBr(q) {
  if (q === '128k' || q === 'standard') return '128k'
  if (q === '320k' || q === 'exhigh') return '320k'
  return '999k'
}

function httpGet(url, headers, timeout) {
  return new Promise(function(resolve, reject) {
    var mod = url.indexOf('https') === 0 ? https : http
    var req = mod.get(url, { headers: headers || {}, timeout: timeout || 8000 }, function(res) {
      var data = ''
      res.on('data', function(chunk) { data += chunk })
      res.on('end', function() {
        try { resolve(JSON.parse(data)) } catch(e) { resolve(data) }
      })
    })
    req.on('error', function(err) { reject(err) })
    req.on('timeout', function() { req.destroy(); reject(new Error('timeout')) })
  })
}

function formatPlayTime(seconds) {
  if (!seconds || isNaN(seconds)) return '--/--'
  var m = Math.floor(seconds / 60)
  var s = seconds % 60
  return m + ':' + (s < 10 ? '0' : '') + s
}

function formatSize(bytes) {
  if (!bytes) return ''
  var n = parseFloat(bytes)
  if (isNaN(n) || n < 0) return ''
  return (n / (1024 * 1024)).toFixed(2) + 'MB'
}

function createSignature(time, str) {
  var deviceId = '963B7AA0D21511ED807EE5846EC87D20'
  var signatureMd5 = '6cdc72a439cef99a3418d2a78aa28c73'
  var sign = crypto.createHash('md5').update(str + signatureMd5 + 'yyapp2d16148780a1dcc7408e06336b98cfd50' + deviceId + time).digest('hex')
  return { sign: sign, deviceId: deviceId }
}

var musicSearch = {
  limit: 30,
  total: 0,
  page: 0,
  allPage: 1,
  search: function(str, page, limit, retryNum) {
    var self = this
    if (retryNum === undefined) retryNum = 0
    if (++retryNum > 3) return Promise.reject(new Error('搜索失败'))
    if (!page) page = 1
    if (limit == null) limit = this.limit
    var time = Date.now().toString()
    var signData = createSignature(time, str)
    var searchSwitch = encodeURIComponent('{"song":1,"album":0,"singer":0,"tagSong":1,"mvSong":0,"bestShow":1,"songlist":0,"lyricSong":0}')
    return httpGet(
      'https://jadeite.migu.cn/music_search/v3/search/searchAll?isCorrect=0&isCopyright=1&searchSwitch=' + searchSwitch + '&pageSize=' + limit + '&text=' + encodeURIComponent(str) + '&pageNo=' + page + '&sort=0&sid=USS',
      {
        'User-Agent': HEADERS_COMMON['User-Agent'],
        uiVersion: 'A_music_3.6.1',
        deviceId: signData.deviceId,
        timestamp: time,
        sign: signData.sign,
        channel: '0146921'
      }
    ).then(function(result) {
      if (!result || typeof result !== 'object' || result.code !== '000000' || !result.songResultData) {
        return self.search(str, page, limit, retryNum)
      }
      var songData = result.songResultData || { resultList: [], totalCount: 0 }
      var ids = {}
      var list = []
      var resultList = songData.resultList || []
      for (var i = 0; i < resultList.length; i++) {
        var item = resultList[i]
        if (!Array.isArray(item)) continue
        for (var j = 0; j < item.length; j++) {
          var data = item[j]
          if (!data.songId || !data.copyrightId || ids[data.copyrightId]) continue
          ids[data.copyrightId] = true
          var qualities = {}
          if (data.audioFormats) {
            for (var k = 0; k < data.audioFormats.length; k++) {
              var type = data.audioFormats[k]
              var size = formatSize(type.asize || type.isize)
              if (type.formatType === 'PQ') qualities.standard = size
              else if (type.formatType === 'HQ') qualities.exhigh = size
              else if (type.formatType === 'SQ') qualities.lossless = size
              else if (type.formatType === 'ZQ24') qualities.hires = size
            }
          }
          var img = data.img3 || data.img2 || data.img1 || ''
          if (img && img.indexOf('http') !== 0) img = 'https://d.musicapp.migu.cn' + img
          var artists = ''
          if (data.singerList) {
            var names = []
            for (var k = 0; k < data.singerList.length; k++) {
              if (data.singerList[k].name) names.push(data.singerList[k].name)
            }
            artists = names.join('、')
          }
          list.push({
            artists: artists,
            name: data.name || '',
            albumName: data.album || '',
            albumId: data.albumId || '',
            id: data.contentId || '',
            source: 'mg',
            interval: formatPlayTime(data.duration),
            pic: img,
            mPic: img,
            sPic: img,
            qualities: qualities
          })
        }
      }
      self.total = parseInt(songData.totalCount) || 0
      self.page = page
      self.allPage = Math.ceil(self.total / limit)
      return { list: list, allPage: self.allPage, limit: limit, total: self.total, source: 'mg' }
    }).catch(function(e) {
      return { list: [], allPage: 1, limit: 30, total: 0, source: 'mg' }
    })
  }
}

var tipSearch = { getList: function(str) { return Promise.resolve([]) } }
var hotSearch = { getList: function() { return Promise.resolve([]) } }

function buildApis(songId, q) {
  var br = mapBr(q)
  var apis = []
  if (CERU_KEY) {
    apis.push({
      name: '聆澜',
      url: 'https://source.shiqianjiang.cn/api/music/url?source=mg&songId=' + songId + '&quality=' + q,
      headers: { 'User-Agent': HEADERS_COMMON['User-Agent'], 'X-API-Key': CERU_KEY },
      extract: function(res) { return res && res.code === 200 && res.url ? res.url : null }
    })
  }
  apis.push(
    {
      name: 'HUIBQ',
      url: 'https://lxmusicapi.onrender.com/url/mg/' + songId + '/' + q,
      headers: { 'User-Agent': HEADERS_COMMON['User-Agent'], 'X-Request-Key': 'share-v3' },
      extract: function(res) { return res && res.code === 0 && res.url ? res.url : null }
    },
    {
      name: '星海',
      url: 'https://music-api.gdstudio.xyz/api.php?types=url&source=migu&id=' + songId + '&br=' + br,
      headers: HEADERS_COMMON,
      extract: function(res) {
        if (res && res.url) return res.url
        if (res && res.data && res.data.url) return res.data.url
        return null
      }
    },
    {
      name: '念心',
      url: 'https://music.nxinxz.com/kgqq/mg.php?id=' + songId + '&level=' + q + '&type=mp3',
      headers: HEADERS_COMMON,
      extract: function(res) {
        if (res && res.url) return res.url
        if (res && res.data && res.data.url) return res.data.url
        return null
      }
    },
    {
      name: '长青',
      url: 'https://music.haitangw.cc/musicapi/mg.php?id=' + songId + '&level=' + q + '&type=mp3',
      headers: HEADERS_COMMON,
      extract: function(res) {
        if (res && res.url) return res.url
        if (res && res.data && res.data.url) return res.data.url
        return null
      }
    },
    {
      name: '星海备',
      url: 'https://music-dl.sayqz.com/api/?source=migu&id=' + songId + '&type=url&br=' + q,
      headers: HEADERS_COMMON,
      extract: function(res) {
        if (res && res.url) return res.url
        if (res && res.data && res.data.url) return res.data.url
        return null
      }
    },
    {
      name: 'fish',
      url: 'https://m-api.ceseet.me/url/mg/' + songId + '/' + q,
      headers: HEADERS_COMMON,
      extract: function(res) {
        if (res && res.url) return res.url
        if (res && res.data && res.data.url) return res.data.url
        return null
      }
    },
    {
      name: 'HYW',
      url: 'https://music.bxa241d4.shop/api/music/url?source=mg&songId=' + songId + '&quality=' + q,
      headers: { 'User-Agent': HEADERS_COMMON['User-Agent'], 'X-Card-Key': 'TF-VSS0-8Y73-U1AW-GEXJ' },
      extract: function(res) {
        if (res && res.url) return res.url
        if (res && res.code === 200 && res.data && res.data.url) return res.data.url
        return null
      }
    },
    {
      name: 'XC',
      url: 'https://music.xc2022.xyz/api/music/url?source=mg&id=' + songId + '&quality=' + q,
      headers: HEADERS_COMMON,
      extract: function(res) {
        if (res && res.url) return res.url
        if (res && res.data && res.data.url) return res.data.url
        return null
      }
    }
  )
  return apis
}

function getUrl(songId, quality) {
  var q = quality || '320k'
  var apis = buildApis(songId, q)
  var promises = []
  for (var i = 0; i < apis.length; i++) {
    (function(api) {
      promises.push(
        httpGet(api.url, api.headers, 8000).then(function(res) {
          var url = api.extract(res)
          if (url) {
            console.log('[Koneko 咪咕音乐] ' + api.name + ' 成功')
            return { name: api.name, url: url }
          }
          throw new Error(api.name + ' 无有效URL')
        }).catch(function(err) {
          console.error('[Koneko 咪咕音乐] ' + api.name + ' 失败: ' + err.message)
          throw err
        })
      )
    })(apis[i])
  }
  return Promise.all(promises.map(function(p) {
    return p.then(function(v) { return { status: 'fulfilled', value: v } }).catch(function(e) { return { status: 'rejected', reason: e } })
  })).then(function(results) {
    for (var i = 0; i < results.length; i++) {
      if (results[i].status === 'fulfilled') return results[i].value.url
    }
    console.error('[Koneko 咪咕音乐] 所有API均失败')
    return ''
  })
}

var leaderboard = { getList: function() { return Promise.resolve([]) } }
var songList = {
  getListDetail: function(id, page, limit) {
    return Promise.resolve({ list: [], page: page || 1, limit: limit || 30, total: 0, source: 'mg', info: { name: '', img: '', desc: '', author: '' } })
  }
}
var singer = { getInfo: function(id) { return Promise.resolve(null) } }
var album = {
  getListDetail: function(id) {
    return Promise.resolve({ list: [], page: 1, limit: 1000, total: 0, source: 'mg', info: { name: '', img: '', desc: '', author: '' } })
  },
  search: function(str, page, limit) { return Promise.resolve([]) }
}

function getLyric(id) { return Promise.resolve('') }
function getPic(songId) { return Promise.resolve('') }
function musicDetail(id) { return Promise.resolve(null) }
function musicInfo(id) { return Promise.resolve(null) }

var pluginInfo = {
  info: { id: 'koneko_mg', name: '咪咕音乐 - Koneko', version: '0.0.2', description: '咪咕音乐聚合音源插件，官方搜索+多API音源，自动测速容灾切换' },
  env: [{ key: 'ceru_key', name: '聆澜API Key', description: '聆澜音源API密钥，留空则跳过聆澜音源' }],
  ext: [],
  quality: [
    { name: '标准音质', ui: '标', id: 'standard' },
    { name: '高品音质', ui: 'HQ', id: 'exhigh' },
    { name: '无损音质', ui: 'SQ', id: 'lossless' },
    { name: 'Hi-Res', ui: 'HR', id: 'hires' }
  ],
  supportFunc: []
}

module.exports = {
  musicSearch: musicSearch,
  tipSearch: tipSearch,
  leaderboard: leaderboard,
  songList: songList,
  hotSearch: hotSearch,
  singer: singer,
  album: album,
  getLyric: getLyric,
  getPic: getPic,
  getUrl: getUrl,
  musicDetail: musicDetail,
  musicInfo: musicInfo,
  pluginInfo: pluginInfo
}