import socket
import select


class ChatServer:
    def __init__( self, port ):
        self.port = port;
        self.srvsock = socket.socket( socket.AF_INET, socket.SOCK_STREAM )
        self.srvsock.setsockopt( socket.SOL_SOCKET, socket.SO_REUSEADDR, 1 )
        self.srvsock.bind( ("localhost", port) )
        self.srvsock.listen( 5 )
        self.descriptors = [self.srvsock]
        print 'ChatServer started on port %s' % port
    def run( self ):
	while 1:
        # Await an event on a readable socket descriptor
            sread, swrite, sexc = select.select( self.descriptors, [], [],5 )
	    # Iterate through the tagged read descriptors
	    for sock in sread:
                # Received a connect to the server (listening) socket
                if sock == self.srvsock:
                    self.accept_new_connection()
                else:
                    # Received something on a client socket
                    str = sock.recv(100)
                    # Check to see if the peer socket closed
                    if str == '':
                        host,port = sock.getpeername()
                        str = 'Client left %s:%s\r\n' % (host, port)
                        self.broadcast_string( str, sock )
                        sock.close()
                        self.descriptors.remove(sock)
                    else:
                        host,port = sock.getpeername()
                        newstr = '[%s:%s] %s' % (host, port, str)
                        self.broadcast_string( newstr, self.srvsock )    

    def accept_new_connection( self ):
        newsock, (remhost, remport) = self.srvsock.accept()
        self.descriptors.append( newsock )
        newsock.send("You're connected to the Python chatserver\r\n")
        str = 'Client joined %s:%s\r\n' % (remhost, remport)
        self.broadcast_string( str, newsock )

    def broadcast_string( self, str, omit_sock ):
        for sock in self.descriptors:
            if sock != self.srvsock and sock != omit_sock:
                sock.send(str)
                print str,

if __name__ == '__main__':

    portno = int(raw_input("Enter the Port:..."))
    s = ChatServer(portno)
    s.run()

