package dk.thoerup.bukkit.hoeruputils;

import org.bukkit.ChatColor;
import org.bukkit.Location;
import org.bukkit.Server;
import org.bukkit.command.Command;
import org.bukkit.command.CommandExecutor;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;

public class WhereisCommand implements CommandExecutor {
	
	Server server;
	
	public WhereisCommand(Server server) {
		this.server = server;
	}

	@Override
	public boolean onCommand(final CommandSender sender, Command command, String label, String[] args) {
		
/*		if (!(sender instanceof Player)) {
			sender.sendMessage("Whereis: What are you");
			return true;
		}*/
		
		if (args.length != 1) {
			sender.sendMessage("Usage: /whereis <playername>");
			return true;
		}
		
		Player target = server.getPlayer(args[0]);
		 
		if (target == null) {
			sender.sendMessage("Whereis: Could not find player: " + args[0] );
			return true;
		}
		
		Location targetLoc = target.getLocation();		
		Player player = (Player) sender;
		
		if (player.getLocation().getWorld() != targetLoc.getWorld()) {
			sender.sendMessage("Whereis: player " + args[0] + " is in another world: " + targetLoc.getWorld().getName() );
			return true;
		}
		
		int dist = calcDistance(player.getLocation(), targetLoc);
		int bearing = calcBearing(player.getLocation(), targetLoc);


		//target.sendMessage("Whereis: you are tracked by " + player.getName() );
		
		
		
		player.sendMessage( ChatColor.WHITE + String.format("Whereis: %s is at %d,%d,%d", target.getName(), (int)targetLoc.getX(), (int)targetLoc.getY(), (int)targetLoc.getZ())  );
		player.sendMessage( ChatColor.WHITE + "Distance: " + dist + ", bearing: " + bearing + "(" + getBearingStr(bearing) + ")" );
		
		return true;
	}

	public static 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 static int calcDistance(Location loc1, Location loc2) {
		double distX = loc1.getX() - loc2.getX()  ;
		double distZ = loc1.getZ() - loc2.getZ()  ;

		int dist = (int) Math.round( Math.sqrt( (distX*distX) + (distZ*distZ)) );

		return dist;
	}

	public static int calcBearing(Location loc1, Location loc2) {
		double distX = loc1.getX() - loc2.getX()  ;
		double distZ = loc1.getZ() - loc2.getZ()  ;

		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;
		}

		return (int) angle;
	}

	
}