/**
 * @name 酷狗音乐 - 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://mobilecdn.kugou.com/api/v3/search/song?format=json&keyword=' + encodeURIComponent(str) + '&page=' + page + '&pagesize=' + limit,
      HEADERS_COMMON
    ).then(function(result) {
      if (!result || typeof result !== 'object' || result.errcode !== 0 || !result.data || !result.data.info) {
        return self.search(str, page, limit, retryNum)
      }
      var list = []
      for (var i = 0; i < result.data.info.length; i++) {
        var item = result.data.info[i]
        var picUrl = ''
        if (item.imgurl && item.imgurl.indexOf('http') === 0) {
          picUrl = item.imgurl.replace('{size}', '400')
        }
        if (!picUrl && item.album_img) {
          picUrl = item.album_img
        }
        list.push({
          id: String(item.hash || ''),
          name: String(item.songname || item.song_name || ''),
          artists: String(item.singername || item.singer_name || ''),
          albumName: String(item.album_name || ''),
          albumId: String(item.album_id || ''),
          source: 'kg',
          interval: String(formatPlayTime(item.duration) || '--/--'),
          pic: picUrl,
          mPic: picUrl,
          sPic: picUrl,
          qualities: {}
        })
      }
      self.total = result.data.total
      self.page = page
      self.allPage = Math.ceil(self.total / limit)
      return { list: list, allPage: self.allPage, limit: limit, total: self.total, source: 'kg' }
    }).catch(function(e) {
      return { list: [], allPage: 1, limit: 30, total: 0, source: 'kg' }
    })
  }
}

var tipSearch = {
  getList: function(str) {
    return httpGet(
      'https://searchtip.kugou.com/getSearchTip?MusicTipCount=10&keyword=' + encodeURIComponent(str),
      { 'User-Agent': HEADERS_COMMON['User-Agent'], referer: 'https://www.kugou.com/' }
    ).then(function(body) {
      if (!body || !body.data) return []
      var result = { order: [], songs: [], artists: [], albums: [] }
      if (body.data.songs && body.data.songs.length > 0) result.order.push('songs')
      if (body.data.artists && body.data.artists.length > 0) result.order.push('artists')
      result.songs = []
      if (body.data.songs) {
        for (var i = 0; i < body.data.songs.length; i++) {
          result.songs.push({ name: body.data.songs[i].name, artist: { name: body.data.songs[i].artist } })
        }
      }
      result.artists = []
      if (body.data.artists) {
        for (var i = 0; i < body.data.artists.length; i++) {
          result.artists.push({ name: body.data.artists[i].name })
        }
      }
      return result
    }).catch(function(e) { return [] })
  }
}

var hotSearch = {
  getList: function() {
    return httpGet(
      'http://gateway.kugou.com/api/v3/search/hot_tab?signature=ee44edb9d7155821412d220bcaf509dd&appid=1005&clientver=10026&plat=0',
      HEADERS_COMMON
    ).then(function(body) {
      if (!body || body.error_code !== 0 || !body.data) return []
      var list = []
      for (var i = 0; i < body.data.length; i++) {
        list.push(body.data[i].keyword || body.data[i].searchword || '')
      }
      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=kg&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/kg/' + 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=kugou&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/kg.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/kgqq/kg.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=kugou&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/kg/' + 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=kg&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 酷狗音乐] ' + 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 酷狗音乐] ' + 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 酷狗音乐] 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: 'kg', 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: 'kg', 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_kg', name: '酷狗音乐 - Koneko', version: '0.0.4', description: '酷狗音乐聚合音源插件，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
}