import java.awt.*;
import java.awt.event.*;

/**
 * This frame pop up for each private chat.
 * Currently the whole frame is static in size. Later need to make it resizable.
 */
public class adPrivateChatFrame extends Frame implements ActionListener{

    private static int GAP = 5;

    private Panel p = null;

    //private TextArea text_area = null;
    private ScrollPane text_area = null;
    private Panel text_area_panel = null;
    private TextField text_field = null;
    private Button send_button = null;
    private adUserInfo sender = null;
    private adUserInfo receiver = null;
    private String room_id = null;
    private adChatClientListener listener = null;
    private int format_msg_width;
    public adPrivateChatFrame(adUserInfo sender, adUserInfo receiver, String room_id, adChatClientListener listener) {
	super("Conversation with " + receiver.user_name);
	this.sender = sender;
	this.receiver = receiver;
	this.listener = listener;
	this.room_id = room_id;

	setSize(400, 400);
	setResizable(false);

	p = new Panel();
	p.setSize(390, 350);

	p.setLayout(null);

	Dimension size = p.getSize();

	int text_field_height = 40;
	int send_button_width = 40;

	int text_area_x = GAP;
	int text_area_y = GAP;
	int text_area_width = size.width - 2 * GAP;
	format_msg_width = text_area_width;

	int text_area_height = size.height - 3 * GAP - text_field_height;
	
	int text_field_x = GAP;
	int text_field_y = text_area_y + text_area_height + GAP;
	int text_field_width = size.width - 3 * GAP - send_button_width;
	int send_button_x = text_field_x + text_field_width + GAP;
	int send_button_y = text_field_y;
	int send_button_height = text_field_height;

	//text_area = new TextArea();
	text_area = new ScrollPane();
	text_area.setBounds(text_area_x, text_area_y, text_area_width, text_area_height);

	text_area_panel = new Panel();
	text_area_panel.setLayout(new OneColumnLayout());
	text_area.add(text_area_panel);
	text_field = new TextField(50);
	text_field.setBounds(text_field_x, text_field_y, text_field_width, text_field_height);
	text_field.addActionListener(this);

	send_button = new Button("Send");
	send_button.setBounds(send_button_x, send_button_y, send_button_width, send_button_height);
	send_button.addActionListener(this);

	p.add(text_area);
	p.add(text_field);
	p.add(send_button);

	add(p);
	enableEvents(AWTEvent.WINDOW_EVENT_MASK);
    }

    protected void processWindowEvent(WindowEvent e) {
	if (e.getID() == WindowEvent.WINDOW_CLOSING) {
	    
	    // Clear all previous messages.
	    //text_area.setText("");
	    dispose();
	}

    }

    private void postMessage() {
	
	if (!text_field.getText().equals("")) {
	    receiveMessage(sender.user_name, text_field.getText());

	    listener.postPrivateMessage(receiver.user_name, text_field.getText());

	    text_field.setText("");
	}
	
    }

    public void actionPerformed(ActionEvent e) {
	Object src = e.getSource();

	if (src == text_field || src == send_button) 
	    postMessage();


    }

    public void receiveMessage(String user_name, String msg) {
	if (user_name == null)
	    user_name = "Unknown";

	text_area_panel.add(new adChatFormatMessage(format_msg_width, user_name, msg));
	text_area_panel.repaint();
	text_area_panel.validate();
	text_area.validate();
			    
	//text_area.append(msg);
	//text_area.append("\n");
	
    }
}