var server = require("http").createServer();
const TLSSigAPIv2 = require('tls-sig-api-v2')
const appids = require('./../config/appid')
const api = new TLSSigAPIv2.Api(appids.shop.appid, appids.shop.key)

function getSig (userId) {
  return api.genSig(userId, 86400)
}

const EVENT = {
  someOneInRoom: 'someOneInRoom',
  someOneLeaveRoom: 'someOneLeaveRoom',
  startCall: 'startCall',
  stopCall: 'stopCall',
  webSyncAction: 'webSyncAction',
  clientSyncAction: 'clientSyncAction',
  action: 'action',
  roomClose: 'roomClose',
  roomIn: 'roomIn',
  changeVoiceStatus: 'changeVoiceStatus',
  changeOnlineStatus: 'changeOnlineStatus',
  roomPersonChange: 'roomPersonChange'
}

const CODEMAP = {
  3001: '房间已被解散',
  3002: '房主主动解散'
}

module.exports = class WebSocketServer {
  constructor() {
    this._pageMap = new Map();
    this._roomIDS = new Map();
    this._roomPerson = new Map()

  }

  create() {
    this.io = require("socket.io")(server, {
      path: "/vr-node",
      serveClient: false,
      // below are engine.IO options
      pingInterval: 10000,
      pingTimeout: 5000,
      cookie: false,
    });
    server.listen(3030, { origins: "*" });

    this.io.on("connection", (socket) => {
      let user = socket.handshake.query
      const { roomId, userId, sceneNum, isClient, role, userLimitNum } = user
      const webRoomId = `${roomId}_${sceneNum}_web`
      const clientRoom = `${userId}${roomId}`
      console.log(user, 'connection')
      // 加入客户端与H5单独的通讯房间 
      socket.join(clientRoom, () => {
      })
      socket.on(EVENT.clientSyncAction, (data) => {
        console.log(data,'clientSyncAction')
        socket.broadcast.to(clientRoom).emit(EVENT.clientSyncAction, data)
      })

      socket.on(EVENT.changeVoiceStatus, data => {
        let _roomPerson = this._roomPerson.get(roomId) || []
        user.voiceStatus = data.status
        _roomPerson.forEach(item => {
          if (item.userId === user.userId) {
            item.voiceStatus = user.voiceStatus
          }
        })
        this._roomPerson.set(roomId, _roomPerson)
        socket.broadcast.to(roomId).emit(EVENT.changeVoiceStatus, {roomsPerson: sortRoomUser(_roomPerson)})
      })
      
      // 若有房间人数限制
      if (userLimitNum && this._roomPerson.get(roomId) && sortRoomUser(this._roomPerson.get(roomId)).length >= userLimitNum) {
        // console.log(this._roomPerson.get(roomId), 'full')
        // console.log(this._roomPerson.get(roomId).length, userLimitNum,  'full')
        setTimeout(() => {
          socket.emit('roomInFail', { type: 'full', msg: '房间人数已满' })
        }, 1000)
        return this
      }

      // 若已结束、房间已关闭
      if ( user.role !== 'leader'&& ((this._roomPerson.get(roomId) && !this._roomPerson.get(roomId).find(item => item.role === 'leader')) || (!this._roomPerson.get(roomId)))) {
        console.log('roomClose')
        setTimeout(() => {
          socket.emit(EVENT.roomClose, { code: 3001, msg: CODEMAP[3001]})
        }, 1000)
        return this
      }

      // 加入所有连接数的通讯房间
      socket.join(roomId, () => {
        // 只有h5才能加入H5端的房间
        if (!isClient) {
          let roomsPerson = this._roomPerson.get(roomId) || []
          if (userId) {
            user.sig = getSig(userId)
          }
          let clientPerson = this._roomPerson.get(clientRoom) || []
          clientPerson.forEach(item => {
            if (item.userId === user.userId && item.avatar) {
              user.avatar = item.avatar
              user.voiceStatus = item.voiceStatus
              user.onlineStatus = item.onlineStatus
              user.nickname = decodeURIComponent(item.nickname)
            }
          })
          roomsPerson.push(user)
          this._roomPerson.set(roomId, roomsPerson)
        }
      })
      let clientPerson = this._roomPerson.get(clientRoom) || []
      if (isClient) {   
        clientPerson.push(user)
        this._roomPerson.set(clientRoom, clientPerson)
      }
      
      if (!isClient) {
        socket.join(webRoomId, () => {
          // let roomsPerson = this._roomPerson.get(roomId) || []
          // socket.broadcast.to(roomId).emit(EVENT.someOneInRoom, { user, roomsPerson: sortRoomUser(roomsPerson) })

        })
      }
      socket.on(EVENT.startCall, () => {
        if (!isClient) {
          let roomsPerson = this._roomPerson.get(roomId) || []
          console.log('startCall', sortRoomUser(roomsPerson) )
          socket.emit(EVENT.roomIn, { roomsPerson: sortRoomUser(roomsPerson) })
          socket.broadcast.to(roomId).emit(EVENT.someOneInRoom, { user, roomsPerson: sortRoomUser(roomsPerson) })
        }
      })

      socket.on(EVENT.changeOnlineStatus, data => {
        user.onlineStatus = data.status
        let roomPerson = this._roomPerson.get(roomId)
        let __roomPerson = updateRoomUser(roomPerson, user)
        let actionName = user.onlineStatus ? 'inRoom' : 'leaveRoom'
        console.log({roomsPerson: sortRoomUser(__roomPerson), actionName})
        socket.broadcast.to(roomId).emit(EVENT.roomPersonChange, {roomsPerson: sortRoomUser(__roomPerson), actionName, user})
      })

      socket.on(EVENT.stopCall, () => {
        socket.leave(roomId)
        if (role === 'leader') {
          socket.broadcast.to(roomId).emit(EVENT.roomClose, { code: 3002, msg: CODEMAP[3002]})
        }
        let roomsPerson = this._roomPerson.get(roomId) || []
        roomsPerson = removeRoomUser(roomsPerson, user)
        this._roomPerson.set(roomId, roomsPerson)
        socket.broadcast.to(roomId).emit(EVENT.someOneLeaveRoom, { user, roomsPerson: sortRoomUser(roomsPerson) })
      })

      socket.on(EVENT.webSyncAction, (data) => {
        socket.broadcast.to(webRoomId).emit(EVENT.webSyncAction, data)
      })

      socket.on(EVENT.action, (data) => {
        console.log(data,'action')
        socket.broadcast.to(roomId).emit(EVENT.action, data)
      })

      socket.on("disconnect", (reason) => {
        socket.leave(roomId)
        if (!isClient) {
          // if (role === 'leader' && reason !== 'ping timeout') {
          //   socket.broadcast.to(roomId).emit(EVENT.roomClose)
          // }
          let roomsPerson = this._roomPerson.get(roomId) || []
          roomsPerson = removeRoomUser(roomsPerson, user)
          this._roomPerson.set(roomId, roomsPerson)
          // socket.broadcast.to(roomId).emit(EVENT.someOneLeaveRoom, { user, roomsPerson })
          socket.leave(webRoomId)
          socket.leave(roomId)
        }
      })

      socket.on('reconnect', () => {
        socket.join(roomId)
        if (!isClient) {
          let roomsPerson = this._roomPerson.get(roomId) || []
          roomsPerson.push(user)
          this._roomPerson.set(roomId, roomsPerson)
          socket.join(webRoomId)
          socket.join(roomId)
        }
      })

      socket.on("error", function (reason) {
        console.log("异常关闭", reason)
      })
      return this;

    })

  }

  close() {
    this.server.disconnect(true);
  }

};

function removeRoomUser (roomsPerson, user) {
  for (let i = 0; i < roomsPerson.length; i++) {
    if (roomsPerson[i].userId === user.userId) {
      roomsPerson.splice(i, 1)
    }
  }
  return roomsPerson
}

function sortRoomUser (roomsPerson) {
  if (!roomsPerson) return []
  const res = new Map()
  return roomsPerson.filter((a) => !res.has(a.userId) && res.set(a.userId, 1))
}

function updateRoomUser (roomsPerson, user) {
  if (!roomsPerson) return []
  roomsPerson.forEach(item => {
    console.log(item.userId === user.userId)
    if (item.userId === user.userId) {
      item = Object.assign(item, user)
    }
  })
  return roomsPerson
}