package ui.view;

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.event.ComponentEvent;
import java.awt.event.ComponentListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import java.awt.geom.CubicCurve2D;
import java.awt.Point;

import javax.swing.JPanel;

import ui.controller.Control;
import ui.model.Model;
import java.awt.BorderLayout;
import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.FlowLayout;
import javax.swing.SwingConstants;

import classes.HolonElement;
import javax.swing.JLabel;
import java.awt.Cursor;

class UnitGraph extends JPanel implements MouseListener, MouseMotionListener, ComponentListener {

	private static final long serialVersionUID = 1L;
	private Control controller;
	private Model model;
	private Graphics2D g2;
	private CubicCurve2D c = new CubicCurve2D.Double();
	private Point[] pointList;

	private HolonElement temp = null;
	private boolean pointDrag = false;
	private int tempP;
	private int x1, x2, y1, y2, ctrlx1, ctrly1, ctrlx2, ctrly2;
	private final JButton resetButton = new JButton("Reset Graph");
	private final JLabel lblName = new JLabel("Name");

	public UnitGraph(final Model model, Control control) {
		setCursor(Cursor.getPredefinedCursor(Cursor.CROSSHAIR_CURSOR));
		this.controller = control;
		this.model = model;
		this.pointList = new Point[model.getIterations()];
		for (int i = 0; i < pointList.length; i++) {
			pointList[i] = new Point(0, 0);
		}

		this.addMouseListener(this);
		this.addMouseMotionListener(this);
		this.addComponentListener(this);

		lblName.setText("None");
		resetButton.setToolTipText("Resets the Graph");
		resetButton.setBackground(Color.WHITE);

		resetButton.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				reset();
			}
		});
		setLayout(new FlowLayout(FlowLayout.CENTER, 5, 5));

		add(lblName);

		add(resetButton);
	}

	/*
	 * Resets the Graph
	 */
	public void reset() {
		for (int i = 0; i < pointList.length; i++) {
			pointList[i] = new Point((i) * this.getWidth() / (model.getIterations() - 1), this.getHeight() / 3);
		}
		repaint();
	}

	/**
	 * Paints all Components on the Canvas
	 * 
	 * @param Graphics
	 * 
	 */
	public void paintComponent(Graphics g) {
		super.paintComponent(g);

		g2 = (Graphics2D) g;
		RenderingHints rh = new RenderingHints(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
		g2.setRenderingHints(rh);
		g2.setStroke(new BasicStroke(1));

		g2.setColor(new Color(240, 240, 240));
		for (int i = 0; i < pointList.length; i++) {
			g2.drawLine((int) pointList[i].getX(), 0, (int) pointList[i].getX(), this.getHeight());
		}

		g2.setColor(Color.BLACK);
		g2.setStroke(new BasicStroke(2));
		for (int i = 0; i < pointList.length - 1; i++) {
			x1 = (int) pointList[i].getX();
			y1 = (int) pointList[i].getY();
			x2 = (int) pointList[i + 1].getX();
			y2 = (int) pointList[i + 1].getY();
			ctrlx1 = (int) pointList[i].getX() + ((int) pointList[i + 1].getX() - (int) pointList[i].getX()) / 2;
			ctrlx2 = (int) pointList[i + 1].getX() - ((int) pointList[i + 1].getX() - (int) pointList[i].getX()) / 2;
			if (y1 < y2) {
				ctrly1 = (int) pointList[i].getY() + ((int) pointList[i + 1].getY() - (int) pointList[i].getY()) / 10;
				ctrly2 = (int) pointList[i + 1].getY()
						- ((int) pointList[i + 1].getY() - (int) pointList[i].getY()) / 10;
			} else {
				ctrly1 = (int) pointList[i].getY() - ((int) pointList[i].getY() - (int) pointList[i + 1].getY()) / 10;
				ctrly2 = (int) pointList[i + 1].getY()
						+ ((int) pointList[i].getY() - (int) pointList[i + 1].getY()) / 10;
			}

			c.setCurve(x1, y1, ctrlx1, ctrly1, ctrlx2, ctrly2, x2, y2);

			// draw the curve
			g2.draw(c);
		}
	}

	@Override
	public void mouseDragged(MouseEvent e) {
		if (temp != null) {
			if (pointDrag && e.getY() >= this.getHeight() / 3 && tempP != -1) {
				pointList[tempP].setLocation(pointList[tempP].getX(), e.getY());
				if (tempP != 0 && pointList[tempP - 1].getY() < pointList[tempP].getY()
						- (pointList[tempP].getY() - this.getHeight() / 3) / 2) {
					pointList[tempP - 1].setLocation(pointList[tempP - 1].getX(),
							pointList[tempP].getY() - (pointList[tempP].getY() - this.getHeight() / 3) / 2);
				}
				if (tempP != model.getIterations() - 1 && pointList[tempP + 1].getY() < pointList[tempP].getY()
						- (pointList[tempP].getY() - this.getHeight() / 3) / 2) {
					pointList[tempP + 1].setLocation(pointList[tempP + 1].getX(),
							pointList[tempP].getY() - (pointList[tempP].getY() - this.getHeight() / 3) / 2);
				}
			} else if (tempP != -1) {
				pointList[tempP].setLocation(pointList[tempP].getX(), this.getHeight() / 3);
			}
			repaint();
		}
	}

	@Override
	public void mouseMoved(MouseEvent e) {
		// TODO Auto-generated method stub
	}

	@Override
	public void mouseClicked(MouseEvent e) {
		// TODO Auto-generated method stub
	}

	@Override
	public void mouseEntered(MouseEvent e) {
		// TODO Auto-generated method stub
	}

	@Override
	public void mouseExited(MouseEvent e) {
		// TODO Auto-generated method stub
	}

	@Override
	public void mousePressed(MouseEvent e) {
		for (int i = 0; i < pointList.length; i++) {
			if (e.getX() - this.getWidth() / model.getIterations() / 2 <= pointList[i].getX()
					&& e.getX() + this.getWidth() / model.getIterations() / 2 >= pointList[i].getX()
					&& e.getY() - 10 < pointList[i].getY() && e.getY() + 10 > pointList[i].getY()) {
				tempP = i;
				pointDrag = true;
			}
		}
	}

	@Override
	public void mouseReleased(MouseEvent e) {
		if (pointDrag) {
			pointDrag = false;
			tempP = -1;
		}
	}

	public void repaintWithNewElement(HolonElement ele) {
		reset();
		float[] arrayOfValue = ele.getEnergyAt();
		lblName.setText(ele.getEleName());
		temp = ele;
		// TODO
	}

	// resize listener
	public void componentResized(ComponentEvent e) {
		if (pointList[0].getY() != 0) {
			reset();
		} else {
			for (int i = 0; i < pointList.length; i++) {
				pointList[i] = new Point((i) * this.getWidth() / (model.getIterations() - 1), this.getHeight() / 3);
			}
		}
		repaint();
	}

	@Override
	public void componentHidden(ComponentEvent e) {
	}

	@Override
	public void componentMoved(ComponentEvent e) {

	}

	@Override
	public void componentShown(ComponentEvent e) {
	}

}