import java.util.logging.*;

public class Setpos extends Plugin {

	final static Logger log = Logger.getLogger("SetposPlugin");

	
	@Override
	public void disable() {}

	@Override
	public void enable() {}
	
	@Override 
	public void initialize() {
		PluginLoader loader = etc.getLoader();
		loader.addListener( PluginLoader.Hook.COMMAND, new RealSetposPlugin(), this, PluginListener.Priority.MEDIUM );
	}



	public static class RealSetposPlugin extends PluginListener {
		final static String USAGE = "Usage: /setpos <x> <z> [height]";
		final static int AIRBLOCK = 0; //block id = 0 is air

	

		//http://www.minecraftforum.net/viewtopic.php?f=35&t=14739
		//Y is height

		// air == blockID:0

		private int getGroundLevel(int x, int z) {
			Server srv = etc.getServer();

			int level = srv.getHighestBlockY(x,z);

			if (level == -1)
				level = 128;
			return level;

/*
			int y;

			for (y=128; y>=0 && srv.getBlockIdAt(x,y-1,z) == AIRBLOCK; y--)
				;

			System.out.println("Groundlevel: " + y);
			System.out.println("getHighestBlockY: " + srv.getHighestBlockY(x,z) );

			return y;
*/
		}


		private boolean isFree(int x, int y, int z) {
			Server srv = etc.getServer();

			return  (srv.getBlockIdAt(x,y,z) == AIRBLOCK && srv.getBlockIdAt(x,y+1,z) == AIRBLOCK);
		}



		@Override
		public boolean onCommand(Player player, java.lang.String[] split) {
			if( split[0].equals("/setpos") ) {
				setPos(player, split);
				return true;
			} else if ( split[0].equals("/whereis" ) ) {
				whereIs(player, split);
				return true;
			} else {
				return false;
			}
	
		}



	 double roundToPlaces(double value, int places) {
		double pow = Math.pow(10, places);
		double temp = Math.round( value*pow );

		return temp / pow;
	}


	private String getBearingStr(int angle) {
		if (angle < 22) {
			return "N";
		} else if (angle < 67) {
			return "NE";
		} else if (angle < 112) {
			return "E";
		} else if (angle < 157) {
			return "SE";
		} else if (angle < 202) {
			return "S";
		} else if (angle < 257) {
			return "SW";
		} else if (angle < 292) {
			return "W";
		} else if (angle < 337) {
			return "NW";
		} else {
			return "N";
		}
	}

	public void whereIs(Player p1, java.lang.String[] split) {
		if (split.length != 2) {
			p1.sendMessage( Colors.Rose + "usage: /whereis <playername>");
			return;
		}
		Player p2 = etc.getServer().getPlayer(split[1]);

		if (p2 == null) {
			p1.sendMessage( Colors.Rose + "whereis: no player named " + split[1] );
			return;
		}
		Location loc1 = p1.getLocation();
		Location loc2 = p2.getLocation();
		//Location loc2 = new Location();
		//loc2.x = loc2.y = loc2.z = 0;

//System.out.println("p1: " + loc1.x + "," + loc1.z );
//System.out.println("p2: " + loc2.x + "," + loc2.z );

		double distX =   loc1.x - loc2.x  ;
		double distZ =   loc1.z - loc2.z  ;

		int dist = (int) Math.round( Math.sqrt( (distX*distX) + (distZ*distZ)) );
/*System.out.println("distX:" + distX );
System.out.println("distZ:" + distZ );

System.out.println(">> " + (distZ / distX ) );*/

		double angle = Math.toDegrees( Math.atan( distZ / distX ) );
		if (angle < 0.0) 
			angle += 90.0;


		if (distX >= 0.0 && distZ >= 0.0) { //both positive, 0-90 degrees
			//do nothing
		} else if (distX < 0.0 && distZ >= 0.0) { // 90-180 degrees
			angle += 90.0;
		} else if (distX < 0.0 && distZ < 0.0) {//Both negative 180-270 degrees
			angle += 180.0; 
		} else {
			angle += 270.0;
		}

		p1.sendMessage( Colors.Yellow + p2.getName() + " is at x:" + roundToPlaces(p2.getX(),2) + " y:" + roundToPlaces(p2.getY(),2) + " z: " + roundToPlaces(p2.getZ(),2) );
		p1.sendMessage( Colors.Yellow + "Distance is " + dist + " blocks" );
		p1.sendMessage( Colors.Yellow + "Bearing: " + (int) angle  + " (" + getBearingStr( (int) angle) + ")" );

		

	}


	public void setPos(Player player, java.lang.String[] split) {
		int x;
		int z;
		int y;

		int userY = 0;
		boolean hasY = false;

		if (split.length <3 || split.length > 4) {
			player.sendMessage(USAGE);
			return;
		}

		try {
			x = Integer.parseInt( split[1] );
			z = Integer.parseInt( split[2] );
			if (split.length == 4) {
				hasY = true;
				userY = Integer.parseInt( split[3] );					
			}
		} catch (Exception e) {
			player.sendMessage("/setpos error: non numeric argument");
			return;
		}



		if (hasY) {
			if (isFree(x,userY,z)) {
				y = userY;
			} else {
				player.sendMessage("/setpos: that position is not free");
				return;
			}
		} else {
			y = getGroundLevel(x,z);
		}

		log.info("Transporting " + player.getName() + " to " + x + " " + z + "(" + y + ")" );


		Location newLocation = new Location();
		newLocation.rotY = player.getPitch();
		newLocation.rotX = player.getRotation();
		newLocation.x = x + 0.5;
		newLocation.z = z + 0.5;
		newLocation.y = y;
	
		player.teleportTo(newLocation);
		player.sendMessage("Whooooooosh");
	}
	}
}