/*******************************************************************************
 * Copyright (c) 2014 Martin Marinov.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Public License v3.0
 * which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/gpl.html
 * 
 * Contributors:
 *     Martin Marinov - initial API and implementation
 ******************************************************************************/
package martin.tempest.gui;

/**
 * The class gives an easy representation of VESA video modes. Use {@link #getVideoModes()} to obtain
 * a list of pre-registered video modes.
 * 
 * @author Martin Marinov
 *
 */
public class VideoMode {
	final public String name;
	final public int width, height;
	final public double refreshrate;
	
	private static VideoMode[] MODES = new VideoMode[] {
		new VideoMode("PAL TV", 576, 625, 25),
		new VideoMode("640x400 @ 85Hz", 832, 445, 85),
		new VideoMode("720x400 @ 85Hz", 936, 446, 85),
		new VideoMode("640x480 @ 60Hz", 800, 525, 60),
		new VideoMode("640x480 @ 100Hz", 848, 509, 100),
		new VideoMode("640x480 @ 72Hz", 832, 520, 72),
		new VideoMode("640x480 @ 75Hz", 840, 500, 75),
		new VideoMode("640x480 @ 85Hz", 832, 509, 85),
		new VideoMode("768x576 @ 60 Hz", 976, 597, 60),
		new VideoMode("768x576 @ 72 Hz", 992, 601, 72),
		new VideoMode("768x576 @ 75 Hz", 1008, 602, 75),
		new VideoMode("768x576 @ 85 Hz", 1008, 605, 85),
		new VideoMode("768x576 @ 100 Hz", 1024, 611, 100),
		new VideoMode("800x600 @ 56Hz", 1024, 625, 56),
		new VideoMode("800x600 @ 60Hz", 1056, 628, 60),
		new VideoMode("800x600 @ 72Hz", 1040, 666, 72),
		new VideoMode("800x600 @ 75Hz", 1056, 625, 75),
		new VideoMode("800x600 @ 85Hz", 1048, 631, 85),
		new VideoMode("800x600 @ 100Hz", 1072, 636, 100),
		new VideoMode("1024x600 @ 60 Hz", 1312, 622, 60),
		new VideoMode("1024x768i @ 43Hz", 1264, 817, 43),
		new VideoMode("1024x768 @ 60Hz", 1344, 806, 60),
		new VideoMode("1024x768 @ 70Hz", 1328, 806, 70),
		new VideoMode("1024x768 @ 75Hz", 1312, 800, 75),
		new VideoMode("1024x768 @ 85Hz", 1376, 808, 85),
		new VideoMode("1024x768 @ 100Hz", 1392, 814, 100),
		new VideoMode("1024x768 @ 120Hz", 1408, 823, 120),
		new VideoMode("1152x864 @ 60Hz", 1520, 895, 60),
		new VideoMode("1152x864 @ 75Hz", 1600, 900, 75),
		new VideoMode("1152x864 @ 85Hz", 1552, 907, 85),
		new VideoMode("1152x864 @ 100Hz", 1568, 915, 100),
		new VideoMode("1280x768 @ 60 Hz", 1680, 795, 60),
		new VideoMode("1280x800 @ 60 Hz", 1680, 828, 60),
		new VideoMode("1280x960 @ 60Hz", 1800, 1000, 60),
		new VideoMode("1280x960 @ 75Hz", 1728, 1002, 75),
		new VideoMode("1280x960 @ 85Hz", 1728, 1011, 85),
		new VideoMode("1280x960 @ 100Hz", 1760, 1017, 100),
		new VideoMode("1280x1024 @ 60Hz", 1688, 1066, 60),
		new VideoMode("1280x1024 @ 75Hz", 1688, 1066, 75),
		new VideoMode("1280x1024 @ 85Hz", 1728, 1072, 85),
		new VideoMode("1280x1024 @ 100Hz", 1760, 1085, 100),
		new VideoMode("1280x1024 @ 120Hz", 1776, 1097, 120),
		new VideoMode("1368x768 @ 60 Hz", 1800, 795, 60),
		new VideoMode("1400x1050 @ 60Hz", 1880, 1082, 60),
		new VideoMode("1400x1050 @ 72 Hz", 1896, 1094, 72),
		new VideoMode("1400x1050 @ 75 Hz", 1896, 1096, 75),
		new VideoMode("1400x1050 @ 85 Hz", 1912, 1103, 85),
		new VideoMode("1400x1050 @ 100 Hz", 1928, 1112, 100),
		new VideoMode("1440x900 @ 60 Hz", 1904, 932, 60),
		new VideoMode("1440x1050 @ 60 Hz", 1936, 1087, 60),
		new VideoMode("1600x1000 @ 60Hz", 2144, 1035, 60),
		new VideoMode("1600x1000 @ 75Hz", 2160, 1044, 75),
		new VideoMode("1600x1000 @ 85Hz", 2176, 1050, 85),
		new VideoMode("1600x1000 @ 100Hz", 2192, 1059, 100),
		new VideoMode("1600x1024 @ 60Hz", 2144, 1060, 60),
		new VideoMode("1600x1024 @ 75Hz", 2176, 1069, 75),
		new VideoMode("1600x1024 @ 76Hz", 2096, 1070, 76),
		new VideoMode("1600x1024 @ 85Hz", 2176, 1075, 85),
		new VideoMode("1600x1200 @ 60Hz", 2160, 1250, 60),
		new VideoMode("1600x1200 @ 65Hz", 2160, 1250, 65),
		new VideoMode("1600x1200 @ 70Hz", 2160, 1250, 70),
		new VideoMode("1600x1200 @ 75Hz", 2160, 1250, 75),
		new VideoMode("1600x1200 @ 85Hz", 2160, 1250, 85),
		new VideoMode("1600x1200 @ 100 Hz", 2208, 1271, 100),
		new VideoMode("1680x1050 @ 60Hz (reduced blanking)", 1840, 1080, 60),
		new VideoMode("1680x1050 @ 60Hz (non-interlaced)", 2240, 1089, 60),
		new VideoMode("1680x1050 @ 60 Hz", 2256, 1087, 60),
		new VideoMode("1792x1344 @ 60Hz", 2448, 1394, 60),
		new VideoMode("1792x1344 @ 75Hz", 2456, 1417, 75),
		new VideoMode("1856x1392 @ 60Hz", 2528, 1439, 60),
		new VideoMode("1856x1392 @ 75Hz", 2560, 1500, 75),
		new VideoMode("1920x1080 @ 60Hz", 2576, 1125, 60),
		new VideoMode("1920x1080 @ 75Hz", 2608, 1126, 75),
		new VideoMode("1920x1200 @ 60Hz", 2592, 1242, 60),
		new VideoMode("1920x1200 @ 75Hz", 2624, 1253, 75),
		new VideoMode("1920x1440 @ 60Hz", 2600, 1500, 60),
		new VideoMode("1920x1440 @ 75Hz", 2640, 1500, 75),
		new VideoMode("1920x2400 @ 25Hz", 2048, 2434, 25),
		new VideoMode("1920x2400 @ 30Hz", 2044, 2434, 30),
		new VideoMode("2048x1536 @ 60Hz", 2800, 1589, 60),
	};
	
	/**
	 * Get all available pre-registered video modes
	 * @return
	 */
	public static VideoMode[] getVideoModes() {
		return MODES;
	}
	
	@Override
	public boolean equals(Object obj) {
		if (super.equals(obj))
			return true;
		
		if (obj instanceof VideoMode) {
			final VideoMode m = (VideoMode) obj;
			return m.height == height && m.width == width && m.refreshrate == refreshrate;
		}
		return false;
	}
	
	/**
	 * Construct a video mode
	 * @param name a user friendly name
	 * @param width the maximum width of transmitted pixels
	 * @param height the maximum height of transmitted pixels
	 * @param refreshrate the refresh rate in Hz
	 */
	public VideoMode(final String name, final int width, final int height, final double refreshrate) {
		this.name = name;
		this.height = height;
		this.width = width;
		this.refreshrate = refreshrate;
	}
	
	@Override
	public String toString() {
		return name;
	}
	
	public static int findClosestVideoModeId(final int width, final int height, final double framerate, final VideoMode[] modes) {
		int mode = -1;
		double diff = 5000.0d;
		for (int i = 0; i < modes.length; i++) {
			final VideoMode m = modes[i];
			if (m.height == height && m.width == width) {
				final double delta = Math.abs(m.refreshrate-framerate);
				if (delta < diff) {
					diff = delta;
					mode = i;
				}
			}
		}
		return mode;
	}
	
	public static int findClosestVideoModeId(final double framerate, final int height, final VideoMode[] modes) {
		int mode = -1;
		double diff = 5000.0d;
		for (int i = 0; i < modes.length; i++) {
			final VideoMode m = modes[i];
			if (m.height == height) {
				final double delta = Math.abs(m.refreshrate-framerate);
				if (delta < diff) {
					diff = delta;
					mode = i;
				}
			}
		}
		
		if (mode == -1) {
			int idiff = 5000;
			for (int i = 0; i < modes.length; i++) {
				final VideoMode m = modes[i];
				final int delta = Math.abs(m.height-height);
				if (delta < idiff) {
					idiff = delta;
					mode = i;
				}
			}
		}
		
		return mode;
	}
}