import java.io.*;

class SvrMsgHndlr	{	//Server Message Handler
        private static String Logg="-----------------------------\n";
	public boolean sndUnPwd(String un,String pwd)	{	//Fucntion to send user info to the ncs for authorization
		return true;
	}
	public boolean rcvAuth()	{	//This function recives true and returns it if the user is authenticated
		return true;
	}
        public String getTheLog()       {       //This function fetches last 30 lines for the server log
                //Logg="\n---------------------------\nsubin:What the fuck?\nnapster:Nothing dude\nsubin:ok\n";   //temp data
                return Logg;
        }
        public boolean updtTheLog(String lc)     {       //Updating the log     //TODO add a send msg procedre
                Logg+=lc+"\n";
                return true;
        }
}

class NetChatClient	{
        static DataInputStream x;       //Input stream for normal reading in
	private static String uname;
	private static String passwd;
        private static String Fullchat; //It is the full string that should be displayed, include local chat and nessessory formatting
        private static String LocalChat;        //Local user's message
	private static SvrMsgHndlr H;   //All the server side things will be done

        public static void readUnamePasswd()
        throws IOException      {       //Function for reading username and password
                System.out.print("Enter your username : ");   //Asks the user for username
	        uname=x.readLine();	//Moves the Username to the variable 'uname'
                System.out.print("Enter your password : ");	//Asks for password
                passwd=x.readLine();    //Moves the Password to the variable 'passwd'
        }
        public static String getLocalMsg()      //Wait for the user Message
        throws IOException      {       //Handled exception
                x=new DataInputStream(System.in);       //Reads the user's message
                return x.readLine();    //Gives back the user input
        }
	public static void main(String args[])  //Main class
        throws IOException	{    //program starts
                x=new DataInputStream(System.in);       //Initializing x
		H=new SvrMsgHndlr();    //Initializing H
                readUnamePasswd();
		H.sndUnPwd(uname,passwd);	//Send the packet to ncs
		while(H.rcvAuth()) {       //While the user is authenticated
                        LocalChat=uname+":"+getLocalMsg();  //Get user input
                        H.updtTheLog(LocalChat);        //Appending local chat
                        System.out.print(H.getTheLog());        //Getting and printing the full chat
                        System.out.print("---------------------------------------------\n"+uname+":");   //Just for user interface
                }
	}
}