const {
    v4: uuidv4
} = require("uuid")
const fs = require("fs");
const server = require("http").createServer()
//本地测试用到https
// var options = {
//     key: fs.readFileSync('./privatekey.pem'),
//     cert: fs.readFileSync('./certificate.pem')
// };
// const server = require("https").createServer(options)
const port = 10010
const one_mode_count = 2 //1V1模式只能2人
const more_mode_count = 30 //多人模式只能30人
const muted = false //默认开启mic
const can_speak = true //默认开启mic

const io = require("socket.io")(server, {
    path: "/im-rtc",
    serveClient: false,
    pingInterval: 10000,
    pingTimeout: 5000,
    cors: {
        origin: "*",
        methods: ["GET", "POST"],
    },
})

io.on("connection", socket => new ClientRequest(socket))

server.listen(port)

const __rooms = {}
class ClientRequest {
    constructor(socket) {
        this.socket = socket
        this.option = socket.handshake.query
        this.init()

        // 没有roomId时新建
        if (!this.option.roomId) {
            this.option.roomId = uuidv4()
        }

        // 没有角色时默认为主持人
        if (!this.option.role) {
            this.option.role = "leader"
        }

        // 判断roomId在房间列表中是否存在
        if (!__rooms[this.option.roomId]) {
            // 初始化房间
            __rooms[this.option.roomId] = []
        }

        // 没有userId时新建
        if (!this.option.userId) {
            // 没有userId就新建

            this.option.userId = "user-" + new Date().getTime()
        }

        let {
            role,
            type,
            roomId,
            userId,
            userName,
        } = this.option
        let user = {
            role,
            type,
            roomId,
            userId,
            userName,
            muted,
            can_speak
        }


        let users = __rooms[this.option.roomId]


        let count
        if (this.option.mode == '1') {
            count = one_mode_count
        } else {
            count = more_mode_count
        }

        if (users.length < count) {
            users.push(user)
            this.socket.join(this.option.roomId)
            this.socket.emit("join", {
                user,
                users,
            })
            this.onUserJoin(user, users)
        } else {
            this.socket.emit("full")
        }



    }
    init() {
        this.socket.on("disconnect", reason => this.onDisconnect(reason))
        this.socket.on("reconnect", reason => this.onReconnect(reason))

        // 通用事件
        this.socket.on("action", data => {

            this.socket.broadcast.to(this.option.roomId).emit("action", data)
        })
        this.socket.on("msg", data => {
            this.socket.broadcast.to(this.option.roomId).emit("msg", data)
            // this.socket.to(this.option.roomId).emit("msg", data)
        })
        this.socket.on("socket_changeMedia", data => {
            this.socket.broadcast.to(this.option.roomId).emit("socket_changeMedia", data)
            // io.to(this.option.roomId).emit('socket_changeMedia', data)
        })
        this.socket.on("webSyncAction", data => {
            console.log('webSyncAction')
            this.socket.broadcast.to(this.option.roomId).emit("webSyncAction", data)
            // io.to(this.option.roomId).emit('socket_changeMedia', data)
        })


        // 踢人
        this.socket.on("getOut", userId => this.onGetOut(userId))

        // 静音
        this.socket.on("muted", (muted, userId) => this.onMuted(muted, userId))
        //禁言
        this.socket.on("forbidden", (data) => {
                let user = null
                let users = __rooms[this.option.roomId]
                if (data.userId) {
                    for (let i = 0; i < users.length; i++) {
                        if (users[i].userId == data.userId) {
                            user = users[i]
                            user.can_speak = !data.can_speak
                            break
                        }
                    }

                    // 没找到指定参与人时不做操作
                    if (!user) {
                        return
                    }
                }
                io.to(this.option.roomId).emit("forbidden", data)
                // this.socket.broadcast.to(this.option.roomId).emit("forbidden", data)

            }


        )
        // 成员关闭推流后通知静音
        this.socket.on("mutedChanged", (muted, userId) => io.to(this.option.roomId).emit("mutedChanged", muted, userId))
    }

    onDisconnect(reason) {
        let user = null
        let users = __rooms[this.option.roomId]

        for (let i = 0; i < users.length; i++) {
            if (this.option.userId == users[i].userId) {
                let splices = users.splice(i, 1)
                if (splices.length) {
                    user = splices[0]
                }
                break
            }
        }

        user && this.onUserLeave(user, users)
    }
    onReconnect(reason) {
        consoel.log('重连了')
    }

    /**
     * 踢人
     */
    onGetOut(userId) {
        if (!this.isLeader()) {
            return
        }
        this.socket.broadcast.to(this.option.roomId).emit("getOut", userId)
    }

    /**
     * 静音
     * @param {*} muted 静音状态
     * @param {*} userId 如果有userId,则设置指定用户静音
     */
    onMuted(muted, userId) {
        // 群体静音只有主持人才能使用
        if (!this.isLeader()) {
            return
        }

        let user = null
        let users = __rooms[this.option.roomId]

        if (userId) {
            for (let i = 0; i < users.length; i++) {
                if (users[i].userId == userId) {
                    user = users[i]
                    user.muted = muted
                    break
                }
            }

            // 没找到指定参与人时不做操作
            if (!user) {
                return
            }
        } else {
            // 设置所有参与人除主持人外静音状态
            users.forEach(item => {
                if (item.role == 'leader') {
                    return
                }
                item.muted = muted
            });
        }
        io.to(this.option.roomId).emit("muted", muted, userId)
        // this.socket.broadcast.to(this.option.roomId).emit("muted", muted, userId)
    }
    /**
     * 通知其他用户有人加入房间
     */
    onUserJoin(user, users) {
        this.socket.broadcast.to(this.option.roomId).emit("userJoin", {
            user,
            users
        })
    }

    /**
     * 通知其他用户有人离开房间
     */
    onUserLeave(user, users) {
        this.socket.broadcast.to(this.option.roomId).emit("userLeave", {
            user,
            users
        })
        console.log(`用户[${user.userId}]离开房间`)
    }

    isLeader() {
        return this.option.role == "leader"
    }


}