/* This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 * 02111-1307, USA.
 *
 * http://www.gnu.org/copyleft/gpl.html
 */
/**
	coded by Balancer
	balancer@balancer.ru
	http://balancer.ru

	version 0.1, 2005-03-12
*/

package com.l2dot.gameserver.model;

import java.util.List;
import java.util.logging.Logger;

import com.l2dot.util.Rnd;

import javolution.util.FastList;

public class L2Territory
{
	private static Logger _log = Logger.getLogger(L2Territory.class.getName());

	protected class Point
	{
		protected int _x, _y, _zmin, _zmax, _proc;
		Point (int x, int y, int zmin, int zmax, int proc) {_x=x; _y=y; _zmin=zmin; _zmax=zmax; _proc=proc;}
	}

	private List<Point> _points;
	private int _terr;
	private int _xMin;
	private int _xMax;
	private int _yMin;
	private int _yMax;
	private int _zMin;
	private int _zMax;
	private int _procMax;

	public L2Territory(int terr)
	{
		_points = new FastList<Point>();
		_terr = terr;
		_xMin = 999999;
		_xMax =-999999;
		_yMin = 999999;
		_yMax =-999999;
		_zMin = 999999;
		_zMax =-999999;
		_procMax = 0;
	}

	public void add(int x, int y, int zmin, int zmax, int proc)
	{
		_points.add(new Point(x,y,zmin,zmax,proc));
		if(x<_xMin) _xMin = x;
		if(y<_yMin) _yMin = y;
		if(x>_xMax) _xMax = x;
		if(y>_yMax) _yMax = y;
		if(zmin<_zMin) _zMin = zmin;
		if(zmax>_zMax) _zMax = zmax;
		_procMax += proc;
	}

	public void print()
	{
		for(Point p : _points)
			System.out.println("("+p._x+","+p._y+")");
	}

	public boolean isIntersect(int x, int y, Point p1, Point p2)
	{
		double dy1 = p1._y - y;
		double dy2 = p2._y - y;

		if(Math.signum(dy1) == Math.signum(dy2))
			return false;

		double dx1 = p1._x - x;
		double dx2 = p2._x - x;

		if(dx1 >= 0 && dx2 >= 0)
			return true;

		if(dx1 < 0 && dx2 < 0)
			return false;

		double dx0 = (dy1 * (p1._x-p2._x))/(p1._y-p2._y);

		return dx0 <= dx1;
	}

	public boolean isInside(int x, int y)
	{
		int intersect_count = 0;
		for(int i=0; i<_points.size(); i++)
		{
			Point p1 = _points.get(i>0 ? i-1 : _points.size()-1);
			Point p2 = _points.get(i);

			if(isIntersect(x,y,p1,p2))
				intersect_count++;
	   	}

		return intersect_count%2 == 1;
	}

	public int[] getRandomPoint()
	{
		int i;
		int[] p = new int[4];
		if ( _procMax>0) {
		    int pos = 0;
		    int rnd = Rnd.nextInt(_procMax);
		    for( i=0; i<_points.size(); i++){
			Point p1 = _points.get(i);
			pos += p1._proc;
			if ( rnd <= pos ){
			    p[0] = p1._x; p[1] = p1._y;
			    p[2] = p1._zmin; p[3] = p1._zmax;
			    return p;
			}
		    }

		}
		for( i=0; i<100; i++)
		{
			p[0] = Rnd.get(_xMin, _xMax);
			p[1] = Rnd.get(_yMin, _yMax);
			if(isInside(p[0],p[1])){
			    double curdistance = 0;
			    p[2] = _zMin+100;p[3] = _zMax;
			    for( i=0; i<_points.size(); i++){
				Point p1 = _points.get(i);
				double dx = p1._x-p[0];
				double dy = p1._y-p[1];
				double distance = Math.sqrt(dx*dx+dy*dy);
				if (curdistance == 0 || distance<curdistance){
				    curdistance = distance;
				    p[2] = p1._zmin+100;
				}
			    }
			    return p;
			}
		}
		_log.warning("Can't make point for territory"+_terr);
		return p;
	}
    	public int getProcMax()
	{
	    return _procMax;
	}

}
