/**
 * @name 酷我音乐 - Koneko
 * @description 聚合音源插件: 官方搜索 + 多API音源容灾
 * @version 0.0.4
 * @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 env = global.env || {}
var CERU_KEY = env.ceru_key || ''

var HEADERS_COMMON = {
  'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36'
}

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
}

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
    return httpGet(
      'http://search.kuwo.cn/r.s?client=kt&all=' + encodeURIComponent(str) + '&pn=' + (page - 1) + '&rn=' + limit + '&uid=794762570&ver=kwplayer_ar_9.2.2.1&vipver=1&show_copyright_off=1&newver=1&ft=music&cluster=0&strategy=2012&encoding=utf8&rformat=json&vermerge=1&mobi=1&issubtitle=1',
      HEADERS_COMMON
    ).then(function(result) {
      if (!result || !result.abslist || result.abslist.length === 0) {
        return self.search(str, page, limit, retryNum)
      }
      var list = []
      for (var i = 0; i < result.abslist.length; i++) {
        var info = result.abslist[i]
        var songId = (info.MUSICRID || '').replace('MUSIC_', '')
        var qualities = {}
        if (info.N_MINFO) {
          var parts = info.N_MINFO.split(';')
          for (var j = 0; j < parts.length; j++) {
            var m = parts[j].match(/level:(\w+),bitrate:(\d+),format:(\w+),size:([\w.]+)/)
            if (m) {
              if (m[2] === '20900') qualities.jymaster = m[4]
              else if (m[2] === '4000') qualities.hires = m[4]
              else if (m[2] === '2000') qualities.lossless = m[4]
              else if (m[2] === '320') qualities.exhigh = m[4]
              else if (m[2] === '128') qualities.standard = m[4]
            }
          }
        }
        var picUrl = ''
        if (info.ALBUMID) {
          picUrl = 'https://img2.kuwo.cn/star/albumcover/300/' + info.ALBUMID + '.jpg'
        } else {
          picUrl = 'http://artistpicserver.kuwo.cn/pic.web?corp=kuwo&type=rid_pic&pictype=500&size=500&rid=' + songId
        }
        var artistStr = ''
        if (info.ARTIST) artistStr = info.ARTIST.replace(/&/g, '、')
        var duration = parseInt(info.DURATION)
        list.push({
          id: String(songId),
          name: String(info.SONGNAME || ''),
          artists: artistStr,
          source: 'kw',
          pic: picUrl,
          mPic: picUrl,
          sPic: picUrl,
          albumName: String(info.ALBUM || ''),
          albumId: String(info.ALBUMID || ''),
          interval: isNaN(duration) ? '--/--' : formatPlayTime(duration),
          qualities: qualities
        })
      }
      self.total = parseInt(result.TOTAL) || 0
      self.page = page
      self.allPage = Math.ceil(self.total / limit)
      return { list: list, allPage: self.allPage, limit: limit, total: self.total, source: 'kw' }
    }).catch(function(e) {
      return { list: [], allPage: 1, limit: 30, total: 0, source: 'kw' }
    })
  }
}

var tipSearch = {
  getList: function(str) {
    return httpGet(
      'https://tips.kuwo.cn/t.s?corp=kuwo&newver=3&p2p=1&notrace=0&c=mbox&w=' + encodeURIComponent(str) + '&encoding=utf8&rformat=json',
      { 'User-Agent': HEADERS_COMMON['User-Agent'], Referer: 'http://www.kuwo.cn/' }
    ).then(function(body) {
      if (!body || !body.abs) return []
      var result = { order: [], songs: [] }
      if (body.abs.length > 0) result.order.push('songs')
      result.songs = []
      for (var i = 0; i < body.abs.length; i++) {
        result.songs.push({ name: body.abs[i].name, artist: { name: body.abs[i].artist } })
      }
      return result
    }).catch(function(e) { return [] })
  }
}

var hotSearch = {
  getList: function() {
    return httpGet(
      'http://hotword.kuwo.cn/hotword.s?prod=kwplayer_ar_9.3.0.1&corp=kuwo&newver=2&vipver=9.3.0.1&source=kwplayer_ar_9.3.0.1_40.apk&p2p=1&notrace=0&uid=0&plat=kwplayer_ar&rformat=json&encoding=utf8&tabid=1',
      { 'User-Agent': 'Dalvik/2.1.0 (Linux; U; Android 9;)' }
    ).then(function(body) {
      if (!body || !body.data) return []
      var list = []
      for (var i = 0; i < body.data.length; i++) {
        list.push(body.data[i].keyword || body.data[i].searchWord || body.data[i].name || '')
      }
      return list
    }).catch(function(e) { return [] })
  }
}

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=kw&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/kw/' + 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=kuwo&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: '收集KW',
      url: 'https://kw-api.cenguigui.cn/api/song/url?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
      }
    },
    {
      name: '念心',
      url: 'https://music.nxinxz.com/kgqq/kw.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://musicapi.haitangw.net/music/kw.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=kuwo&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/kw/' + 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=kw&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
      }
    }
  )
  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 酷我音乐] ' + 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 酷我音乐] ' + 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 酷我音乐] 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: 'kw', 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: 'kw', 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_kw', name: '酷我音乐 - Koneko', version: '0.0.4', description: '酷我音乐聚合音源插件，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
}