package org.manzerbredes.open_klm.device;

import java.io.IOException;

import com.codeminders.hidapi.HIDDevice;
import com.codeminders.hidapi.HIDManager;

/**
 * 
 * Driver to communicate with the keyboard device
 * using HIDAPI.
 * 
 * @author Manzerbredes
 *
 */
public class Driver{
	
	/**
	 * Defined Region Helper
	 * 
	 * @author Manzerbredes
	 *
	 */
	public enum Region{
		LEFT(1), MIDDLE(2), RIGHT(3);
		
		private int current;
		
		Region(int current){
			this.current=current;
		}
		
		public int intValue(){
			return this.current;
		}
	}
	
	/**
	 * Defined Color Helper
	 * 
	 * @author Manzerbredes
	 *
	 */
	public enum Color{
		OFF(0),RED(1),ORANGE(2),YELLOW(3),GREEN(4),SKY(5), BLUE(6),PURPLE(7),WHITE(8);
		
		private int current;
		
		Color(int current){
			this.current=current;
		}
		
		public int intValue(){
			return this.current;
		}
	}

	/**
	 * Defined Level Helper
	 * 
	 * @author Manzerbredes
	 *
	 */
	public enum Intensity{
		HIGH(0), MEDIUM(1), LOW(2), LIGHT(3);
		
		private int current;
		
		Intensity(int current){
			this.current=current;
		}
		
		public int intValue(){
			return this.current;
		}
	}

	/**
	 * Defined Mode Helper
	 * 
	 * @author Manzerbredes
	 *
	 */
	public enum Mode{
		NORMAL(1), GAMING(2), BREATHE(3), DEMO(4), WAVE(5);
		
		private int current;
		
		Mode(int current){
			this.current=current;
		}
		
		public int intValue(){
			return this.current;
		}
	}
	
	/**
	 * Device entry
	 */
	HIDDevice device;
	
	
	/**
	 * Init driver and HIDAPI library
	 * 
	 * @throws InstantiationException 
	 */
	public Driver() throws InstantiationException{
		// Init HIDAPI Library
		com.codeminders.hidapi.ClassPathLibraryLoader.loadNativeHIDLibrary();
		
		// Try not bind the device
		try {
			HIDManager man=HIDManager.getInstance();
			this.device=man.openById(0x1770, 0xff00, null);
			if(this.device==null)
				throw new Exception();
		}
		catch(Exception e){
			throw new InstantiationException("Failed to instanciate driver. Device not found or permission denied (try as root)");
		}
		
	}
	
	
	/**
	 * Build a byte[] report
	 * 
	 * @param a
	 * @param b
	 * @param c
	 * @param d
	 * @param e
	 * @param f
	 * @param g
	 * @param h
	 * @return
	 */
	private byte[] getReport(int a, int b, int c, int d, int e, int f, int g, int h){
		byte[] message = new byte[8];
		message[0] = (byte) a;
		message[1] = (byte) b;
		message[2] = (byte) c;
		message[3] = (byte) d;
		message[4] = (byte) e;
		message[5] = (byte) f;
		message[6] = (byte) g;
		message[7] = (byte) h;
		return message;
	}
	
	
	/**
	 * Set Color of region
	 * 
	 * @param region Region to apply
	 * @param color Color to apply
	 * @param intensity Intensity wanted
	 */
	public void setColor(Region region, Color color, Intensity intensity){
		try {
			this.device.sendFeatureReport(this.getReport(1,2,66,region.intValue(),color.intValue(),intensity.intValue(),0,236));
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	
	/**
	 * Commit change
	 * 
	 * @param mode Mode wanted
	 */
	public void commit(Mode mode){
		try {
			this.device.sendFeatureReport(this.getReport(1,2,65,mode.intValue(),0,0,0,236));
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	
}