package com.roboclub.robobuggy.ui;

import com.roboclub.robobuggy.main.RobobuggyLogicNotification;
import com.roboclub.robobuggy.main.RobobuggyMessageLevel;

import javax.swing.JFrame;
import java.awt.event.WindowEvent;
import java.util.HashMap;

/**
 * {@link JFrame} used to represent the robobuggy gui
 *
 * @author Trevor Decker
 * @author Kevin Brennan
 * @version 0.5
 *          <p>
 *          CHANGELOG: NONE
 *          <p>
 *          DESCRIPTION: This class is the top level controller for the graphical user interface displayed to the user
 */
public final class Gui extends JFrame {
    private static final long serialVersionUID = 670947948979376738L;


    //The windowList is a list of all of the windows that are a part of the gui
    private HashMap<Integer, RobobuggyJFrame> windowMap;
    private int currentWindowId;

    private static Gui instance;

    /**
     * Enum of {@link Gui} publisher and subscriber topics
     */
    public enum GuiPubSubTopics {
        GUI_LOG_BUTTON_UPDATED,
    }

    /**
     * Repaints all objects in the {@link Gui}
     */
    public void fixPaint() {
        windowMap.forEach((key, window) -> window.repaint());
    }

    /**
     * Returns a reference to the one instance of the {@link Gui}.
     * If none exists, one will be constructed.
     *
     * @return a reference to the one instance of the {@link Gui}
     */
    public static synchronized Gui getInstance() {
        if (instance == null) {
            instance = new Gui();
        }
        return instance;
    }

    /**
     * Construct a new {@link Gui} object
     */
    private Gui() {
        new RobobuggyLogicNotification("StartingGUI", RobobuggyMessageLevel.NOTE);
        windowMap = new HashMap<>();
        currentWindowId = -1;

    }


    /**
     * Adds a new window to the
     *
     * @param newWindow the window you want added
     * @return a unique reference number to the window for access later
     */
    public synchronized int addWindow(RobobuggyJFrame newWindow) {
        currentWindowId++;
        windowMap.put(currentWindowId, newWindow);
        return currentWindowId;
    }

    /**
     * gets a reference to a particular frame of the window
     *
     * @param windowReference the reference to receive
     * @return the requested frames reference
     */
    public synchronized RobobuggyJFrame getWindow(int windowReference) {
        return windowMap.get(windowReference);
    }

    /**
     * removes a reference to a particular frame of the window
     *
     * @param windowReference the reference to remove
     * @return
     */
    public synchronized void deleteWindow(int windowReference) {
        windowMap.remove(windowReference);

    }

    /**
     * Closes the {@link Gui}
     */
    public static synchronized void close() {
        new RobobuggyLogicNotification("trying to close gui", RobobuggyMessageLevel.NOTE);
        instance.dispatchEvent(new WindowEvent(instance, WindowEvent.WINDOW_CLOSING));
        new RobobuggyLogicNotification("gui has been closed", RobobuggyMessageLevel.NOTE);
        instance = null;
    }

}