package edu.grcc;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.ServerSocket;
import java.net.Socket;

public class SimpleServerProgram {

    public static void main(String args[]) {

        ServerSocket listener = null;
        String line;
        BufferedReader is;
        BufferedWriter os;
        Socket socketOfServer = null;

        // Try to open a server socket on port 7777
        // Note that we can't choose a port less than 1023 if we are not
        // privileged users (root)


        try {
            listener = new ServerSocket(7777);
        } catch (IOException e) {
            System.out.println(e);
            System.exit(1);
        }

        try {
            System.out.println("Server is waiting to accept user...");

            // Accept client connection request
            // Get new Socket at Server.
            socketOfServer = listener.accept();
            System.out.println("Accept a client!");

            // Open input and output streams
            is = new BufferedReader(new InputStreamReader(socketOfServer.getInputStream()));
            os = new BufferedWriter(new OutputStreamWriter(socketOfServer.getOutputStream()));


            while (true) {
                // Read data to the server (sent from client).
                line = is.readLine();

                // Write to socket of Server
                // (Send to client)
                os.write(">> " + line);
                // End of line
                os.newLine();
                // Flush data.
                os.flush();


                // If users send QUIT (To end conversation).
                if (line.equals("QUIT")) {
                    os.write(">> OK");
                    os.newLine();
                    os.flush();
                    break;
                }
            }

        } catch (IOException e) {
            System.out.println(e);
            e.printStackTrace();
        }
        System.out.println("Sever stopped!");
    }
}