var http = require("http");
  var url = require('url');
  var fs = require('fs');
  var io = require('socket.io'); // 加入 Socket.IO
  
  var server = http.createServer(function(request, response) {
  
    console.log('Connection');
    var path = url.parse(request.url).pathname;
    
    switch (path) {
      case '/':
        response.writeHead(200, {'Content-Type': 'text/html'});
        response.write('Hello, World.');
        response.end();
        break;
      case '/socket.html':
        fs.readFile(__dirname + path, function(error, data) {
          if (error){
            response.writeHead(404);
            response.write("opps this doesn't exist - 404");
          } else {
            response.writeHead(200, {"Content-Type": "text/html"});
            response.write(data, "utf8");
          }
          response.end();
        });
        break;
      default:
        response.writeHead(404);
        response.write("opps this doesn't exist - 404");
        response.end();
        break;
    }
  });
  
  server.listen(8001);
  io.listen(server);  // 開啟 Socket.IO 的 listener
  
  var serv_io = io.listen(server);
  /*serv_io.sockets.on('connection', function(socket) {
      //socket.emit('message', {'message': 'hello world'});
  		setInterval(function() {
  			socket.emit('date', {'date': getRandomInt(0,90)});
  		  }, 1000);
  		
  		// 接收來自於瀏覽器的資料
  		socket.on('client_data', function(data) {
  			process.stdout.write(data.letter);
  		});
  });*/
  
  
  // Load the TCP Library
  net = require('net');
  
  // Keep track of the chat clients
  var clients = [];
  
  // Start a TCP Server
  net.createServer(function (socket) {
  
   
    // Put this new client in the list
    clients.push(socket);
  
    // Handle incoming messages from clients.
    socket.on('data', function (data) {
      broadcast(data, socket);
  	
  		serv_io.emit('date', {'date': 
  			data.toString('utf8')	
  		});
  	/*
  	setInterval(function() {
  		serv_io.emit('date', {'date': 
  			data.toString('utf8')	
  		});
  	}, 1000);
  	*/
    });
    
    // Send a message to all clients
    function broadcast(message, sender) {
      clients.forEach(function (client) {
        // Don't want to send it to sender
        if (client === sender) return;
        client.write(message);
      });
      // Log it to the server output too
      process.stdout.write(message)
    }
  
  }).listen(5200);
  
  
  
    
  
  function getRandomInt(min, max) {
      return Math.floor(Math.random() * (max - min + 1)) + min;
  }