package Chatroom;

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;

import javax.swing.*;

/*
 * This special client is made for debugging purposes. It allows to enter a custom message and send it as is to the server. By following the
 * communication protocol, it is possible to simulate every client action and verify that the server correctly processes the response.
 * @version 0.1
 */
public class AdminClient {

    BufferedReader in;
    PrintWriter out;
    JFrame frame = new JFrame("Chatter");
    JTextField textField = new JTextField(40);
    JTextArea messageArea = new JTextArea(8, 40);

    /**
     * Constructs the client by laying out the GUI and registering a listener with the
     * textfield so that pressing Enter in the listener sends the textfield contents
     * to the server. This textfield is initially not editable, and only becomes
     * editable after the client receives the NAMEACCEPTED message from the server.
     */
    public AdminClient() {

        //Layout GUI
        textField.setEditable(true);
        messageArea.setEditable(false);
        frame.getContentPane().add(textField, "North");
        frame.getContentPane().add(new JScrollPane(messageArea), "Center");
        frame.pack();

        //Add listeners
        textField.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) { //When pressed ENTER in the textfield, this is triggered
                out.println(textField.getText());
                textField.setText("");
            }
        });
    }

    /**
     * Ask for the server IP address that the user wants to connect to
     */
    private String getServerAddress() {
        return JOptionPane.showInputDialog(frame, "Enter IP of server:", "Welcome to the chatbox",
                JOptionPane.QUESTION_MESSAGE);
    }

    /**
     * Ask for the desired username.
     */
    private String getName() {
        return JOptionPane.showInputDialog(frame, "Choose a screen name:", "Username required",
                JOptionPane.PLAIN_MESSAGE);
    }

    /**
     * Connects to the server then enters the processing loop.
     */
    public void run() throws IOException {
        String serverAddress = getServerAddress();
        Socket socket = new Socket(serverAddress, 9001);
        in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
        out = new PrintWriter(socket.getOutputStream(), true);

        //Process all server messages, according to the protocol
        while (true) {
            String line = in.readLine();
                messageArea.append(line + "\\n"); //Start message at character 8(after the protocol word MESSAGE)
        }
    }

     public static void main(String[] args) throws Exception {
            AdminClient client = new AdminClient();
            client.frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            client.frame.setVisible(true);
            client.run();

         }


}