/**
 * @name GIT音源 - Koneko
 * @description 聚合音源插件: 纯音源（无搜索）+ 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 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 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 buildApis(songId, q) {
  var apis = []
  if (CERU_KEY) {
    apis.push({
      name: '聆澜',
      url: 'https://source.shiqianjiang.cn/api/music/url?source=git&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/git/' + 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 }
  })
  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 GIT音源] ' + 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 GIT音源] ' + 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 GIT音源] 所有API均失败')
    return ''
  })
}

var musicSearch = {
  search: function(str, page, limit) {
    return Promise.resolve({ list: [], total: 0, page: page || 1, limit: limit || 30, allPage: 0, source: 'koneko_git' })
  }
}
var tipSearch = { getList: function(str) { return Promise.resolve([]) } }
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: 'koneko_git', info: { name: '', img: '', desc: '', author: '' } })
  }
}
var hotSearch = { getList: function() { return Promise.resolve([]) } }
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: 'koneko_git', 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_git', name: 'GIT音源 - Koneko', version: '0.0.2', description: 'GIT音源聚合插件，聚合2+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
}