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package com.bestray.healthcarecommonutil.util;

import javax.swing.*;
import java.awt.*;
import java.awt.geom.GeneralPath;

// TODO: Auto-generated Javadoc
/**
 * The Class CurvedGradientPanel.
 */
public class CurvedGradientPanel extends JPanel {
	
	/** The Constant VERTICAL. */
	public static final int VERTICAL = 0;
	
	/** The Constant HORIZONTAL. */
	public static final int HORIZONTAL = 1;
	
	/** The round rect size. */
	private int roundRectSize = 0;

	/** The start color of the gradient. */
	private Color startColor = new Color(114, 166, 252);

	/** The end color of the gradient. */
	private Color endColor = new Color(255, 255, 255);

	/** The direction of the gradient. */
	private int direction = VERTICAL;

	// ------------------------------------------------------------------------------------------------------------------
	// Constructors and getter/setter methods
	// ------------------------------------------------------------------------------------------------------------------

	/**
	 * Create a default SimpleGradientPanel instance.
	 */
	public CurvedGradientPanel() {
		super();
	}

	/**
	 * Create a SimpleGradientPanel with the given start and end colors.
	 * 
	 * @param aStart
	 *            The start color for the gradient.
	 * @param aEnd
	 *            The end color for the gradient.
	 */
	public CurvedGradientPanel(Color aStart, Color aEnd) {
		super();
		startColor = aStart;
		endColor = aEnd;
	}

	/**
	 * Create a SimpleGradientPanel with the given start and end colors.
	 * 
	 * @param aStart
	 *            The start color for the gradient.
	 * @param aEnd
	 *            The end color for the gradient.
	 * @param aDirection
	 *            The direction of the gradient.
	 */
	public CurvedGradientPanel(Color aStart, Color aEnd, int aDirection) {
		super();
		startColor = aStart;
		endColor = aEnd;
		direction = aDirection;
	}

	/**
	 * Create a SimpleGradientPanel with the given start and end colors.
	 * 
	 * @param aStart
	 *            The start color for the gradient.
	 * @param aEnd
	 *            The end color for the gradient.
	 * @param aDirection
	 *            The direction of the gradient.
	 * @param aRoundRectSise
	 *            The rounded size of the Rectangle.
	 */
	public CurvedGradientPanel(Color aStart, Color aEnd, int aDirection,
			int aRoundRectSise) {
		super();
		startColor = aStart;
		endColor = aEnd;
		direction = aDirection;
		roundRectSize = aRoundRectSise;
	}

	/**
	 * Get the ending color of the gradient.
	 *
	 * @return the end color
	 */
	public Color getEndColor() {
		return endColor;
	}

	/**
	 * Set the ending color to use.
	 * 
	 * @param aColor
	 *            The color to use.
	 */
	public void setEndColor(Color aColor) {
		Color oldEndColor = endColor;
		endColor = aColor;
		super.firePropertyChange("endColor", oldEndColor, endColor);
		repaint();
	}

	/**
	 * Get the start color of the gradient.
	 *
	 * @return the start color
	 */
	public Color getStartColor() {
		return startColor;
	}

	/**
	 * Set the starting color.
	 * 
	 * @param aColor
	 *            The color to use
	 */
	public void setStartColor(Color aColor) {
		Color oldStartColor = endColor;
		startColor = aColor;
		super.firePropertyChange("startColor", oldStartColor, startColor);
		repaint();
	}

	/**
	 * Get the direction (vertical or horizontal) of the gradient.
	 *
	 * @return the direction
	 */
	public int getDirection() {
		return direction;
	}

	/**
	 * Set the direction.
	 *
	 * @param aDirection The direction of the gradient
	 */
	public void setDirection(int aDirection) {
		int oldDirection = direction;
		direction = aDirection;
		super.firePropertyChange("direction", oldDirection, aDirection);
		repaint();
	}

	// ------------------------------------------------------------------------------------------------------------------
	// Custom painting methods
	// ------------------------------------------------------------------------------------------------------------------

	/**
	 * Override the default paintComponent method to paint the gradient in the
	 * panel.
	 *
	 * @param g the g
	 */
	public void paintComponent(Graphics g) {
		Dimension dim = getSize();
		Graphics2D g2 = (Graphics2D) g;
		Insets inset = getInsets();
		int vWidth = dim.width - (inset.left + inset.right);
		int vHeight = dim.height - (inset.top + inset.bottom);

		if (direction == HORIZONTAL) {
			paintHorizontalGradient(g2, inset.left, inset.top, vWidth, vHeight,
					dim.width);
		} else {
			paintVerticalGradient(g2, inset.left, inset.top, vWidth, vHeight,
					dim.height);
		}

	}

	/**
	 * Paints a vertical gradient background from the start color to the end
	 * color.
	 *
	 * @param g2d the g2d
	 * @param x the x
	 * @param y the y
	 * @param w the w
	 * @param h the h
	 * @param height the height
	 */
	private void paintVerticalGradient(Graphics2D g2d, int x, int y, int w,
			int h, int height) {
		g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
				RenderingHints.VALUE_ANTIALIAS_ON);

		GradientPaint p1;
		GradientPaint p2;
		GradientPaint GP = new GradientPaint(0, 0, startColor, 0, h, endColor,
				true);
		g2d.setPaint(GP);

		g2d.setPaint(Color.BLACK);
		g2d.drawRoundRect(0, 0, w - 1, h - 1, roundRectSize, roundRectSize);
		g2d.setPaint(GP);
		g2d.fillRoundRect(1, 1, w - 2, h - 2, roundRectSize, roundRectSize);
		g2d.setPaint(Color.WHITE);
		g2d.drawRoundRect(1, 1, w - 3, h - 3, roundRectSize, roundRectSize);

		g2d.setPaint(new Color(255, 255, 255, 100));
		GeneralPath path = new GeneralPath();
		path.moveTo(-5, 1);
		path.quadTo(w / 2, h / 2, w, 0);
		path.closePath();
		g2d.fill(path);

	}

	/**
	 * Paints a horizontal gradient background from the start color to the end
	 * color.
	 *
	 * @param g2d the g2d
	 * @param x the x
	 * @param y the y
	 * @param w the w
	 * @param h the h
	 * @param width the width
	 */
	private void paintHorizontalGradient(Graphics2D g2d, int x, int y, int w,
			int h, int width) {
		g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
				RenderingHints.VALUE_ANTIALIAS_ON);
		GradientPaint p1;
		GradientPaint p2;
		GradientPaint GP = new GradientPaint(0, 0, startColor, w, 0, endColor,
				true);
		g2d.setPaint(GP);

		g2d.setPaint(Color.BLACK);
		g2d.drawRoundRect(0, 0, w - 1, h - 1, 10, 10);
		g2d.setPaint(GP);
		g2d.fillRoundRect(1, 1, w - 2, h - 2, 10, 10);
		g2d.setPaint(new Color(255, 255, 255, 100));
		GeneralPath path = new GeneralPath();
		path.moveTo(-5, 1);
		path.quadTo(w / 2, h / 2, w, 0);
		path.closePath();
		g2d.fill(path);
		
	}

}