var express = require('express');
var path = require('path');
var IO = require('socket.io');
var router = express.Router();

var app = express();
var server = require('http').Server(app);
app.use(express.static(path.join(__dirname, 'public')));
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'html');

// 创建socket服务
var socketIO = IO(server);
// 房间用户名单
var roomInfo = {};

socketIO.on('connection', function (socket) {
  // 获取请求建立socket连接的url
  // 如: http://localhost:3000/room/room_1, roomID为room_1
  var url = socket.request.headers.referer;
  // var splited = url.split('/');
  var roomID = 0;
  var user = '';

  socket.on('join', function (userName) {
    user = userName;

    // 将用户昵称加入房间名单中
    if (!roomInfo[roomID]) {
      roomInfo[roomID] = [];
    }
    var rename = 1;
    if(roomInfo[roomID].length>0)
    while(roomInfo[roomID].indexOf(user)!==-1){
          user = user+"-重名"+rename;
          rename++;
    }
    rename = 1;
    roomInfo[roomID].push(user);
    socket.join(roomID);    // 加入房间
    // 通知房间内人员
    socketIO.to(roomID).emit('sys', user + '加入了房间', roomInfo[roomID]);  
    console.log(user + '加入了' + roomID);
  });

  socket.on('leave', function () {
    socket.emit('disconnect');
  });

  socket.on('disconnect', function () {
    // 从房间名单中移除
    var index = roomInfo[roomID].indexOf(user);
    if (index !== -1) {
      roomInfo[roomID].splice(index, 1);
    }

    socket.leave(roomID);    // 退出房间
    socketIO.to(roomID).emit('sys', user + '退出了房间', roomInfo[roomID]);
    console.log(user + '退出了' + roomID);
  });

  // 接收用户消息,发送相应的房间
  socket.on('message', function (msg) {
    // 验证如果用户不在房间内则不给发送
    if (roomInfo[roomID].indexOf(user) === -1) {  
      return false;
    }
    socketIO.to(roomID).emit('msg', user, msg);
  });

});

// room page
router.get('/room/:roomID', function (req, res) {
  var roomID = req.params.roomID;

  // 渲染页面数据(见views/room.hbs)
  res.sendFile(path.join(__dirname, 'views',"room.html"),{
        roomID: roomID,
    users: roomInfo[roomID]
  });
  // res.render('room', {
  //   roomID: roomID,
  //   users: roomInfo[roomID]
  // });
});

app.use('/', router);

server.listen(3000, function () {
  console.log('server listening on port 3000');
});