package de.tu_darmstadt.tk.SmartHomeNetworkSim.view;

import java.awt.Color;
import java.awt.Graphics;
import java.awt.event.ComponentEvent;
import java.awt.event.ComponentListener;
import java.util.Collection;

import javax.swing.JPanel;

import de.tu_darmstadt.tk.SmartHomeNetworkSim.control.Controller;
import de.tu_darmstadt.tk.SmartHomeNetworkSim.core.Connection;
import de.tu_darmstadt.tk.SmartHomeNetworkSim.core.Model;
import de.tu_darmstadt.tk.SmartHomeNetworkSim.core.SmartDevice;

@SuppressWarnings("serial")
public class VisualisationPanel extends JPanel {

	/**
	 * Smart Home model which is visualized
	 */
	private Model model;

	/**
	 * Controller to notify when the model changes
	 */
	private Controller control;

	/**
	 * Listener which processes the GUI Interactions
	 */
	private VisualisationInteractor interactor;

	/**
	 * Radius of a circle around the SmartDevice (including middlepoint)
	 */
	private int visualisationRadius = 17;

	/**
	 * Initializes the Visualisation Panel
	 * 
	 * @param model
	 *            Model to visualize
	 * @param control
	 *            Control, which changes the model
	 */
	public VisualisationPanel(Model model, Controller control) {
		super();

		this.model = model;
		this.control = control;
		
		this.interactor = new VisualisationInteractor(model, control, this);

		this.addMouseMotionListener(interactor);
		this.addMouseListener(interactor);
	}
	
	/**
	 * Performs further initializations, which have to be performed, after the model was made visible
	 */
	public void delayedInit(){
		this.addComponentListener(new ComponentListener() {

			@Override
			public void componentShown(ComponentEvent e) {
			}

			@Override
			public void componentResized(ComponentEvent e) {
				control.setDimension(getWidth(), getHeight(), model.getDepth(), true);
				repaint();
			}

			@Override
			public void componentMoved(ComponentEvent e) {
			}

			@Override
			public void componentHidden(ComponentEvent e) {
			}
		});
	}
	
	@Override
	public void paint(Graphics g) {
		// paint white background
		g.setColor(Color.white);
		g.fillRect(0, 0, this.getWidth(), this.getHeight());
		
		paintConnections(g);
		
		paintDevices(g);
	}

	/**
	 * Paints the smart devices of the Model
	 * 
	 * @param g
	 */
	public void paintDevices(Graphics g) {

		for (SmartDevice s : model.getDevices()) {
			int x = s.getX();
			int y = s.getY();
			if (s == interactor.dragged) {
				// Update visualization of dragged object
				x = interactor.dragged_x;
				y = interactor.dragged_y;
			}
			g.setColor(Color.WHITE);
			g.fillOval(x - visualisationRadius, y - visualisationRadius, 2*visualisationRadius-1, 2*visualisationRadius-1);
			g.setColor(Color.BLACK);
			g.drawOval(x - visualisationRadius, y - visualisationRadius, 2*visualisationRadius-1, 2*visualisationRadius-1);
			g.setColor(Color.BLUE);
			g.drawOval(x - visualisationRadius+2, y - visualisationRadius+2, 2*visualisationRadius-5, 2*visualisationRadius-5);
			g.setColor(Color.BLACK);
			g.drawString(s.getName(), x - g.getFontMetrics().stringWidth(s.getName()) / 2, y + visualisationRadius+11);
		}
	}
	
	/**
	 * Paints the Connections
	 * @param g
	 */
	private void paintConnections(Graphics g){
		g.setColor(Color.RED);
		//For all Connections
		for (SmartDevice s : model.getDevices())
			for(Connection c: s.getConnections()){
				//Draw just once, if the device is the source
				if(c.getSource() == s){
					/**
					 * All Devices that are part of the connection
					 */
					Collection<SmartDevice> d = c.getParticipants();
					if(d.size() == 2){
						
						for(SmartDevice sd: d)
							if(s!=sd){
								//Check if dragged object
								int s_x,s_y,sd_x,sd_y;
								if(s == interactor.dragged){
									s_x = interactor.dragged_x;
									s_y = interactor.dragged_y;
								}else{
									s_x = s.getX();
									s_y = s.getY();
								}
								if(sd == interactor.dragged){
									sd_x = interactor.dragged_x;
									sd_y = interactor.dragged_y;
								}else{
									sd_x = sd.getX();
									sd_y = sd.getY();
								}
								g.drawLine(s_x, s_y, sd_x, sd_y);
							}
					}else if(d.size() == 1){
						
					} else if(d.size() <= 0){
						//Invalid Connection
					}else{
						//Draw MultiConnection
					}
				}
			}
	}

	/**
	 * @return the visualisationRadius
	 */
	public int getVisualisationRadius() {
		return visualisationRadius;
	}

	/**
	 * @param visualisationRadius the visualisationRadius to set
	 */
	public void setVisualisationRadius(int visualisationRadius) {
		this.visualisationRadius = visualisationRadius;
	}

}