/* 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
 */
package com.l2jfrozen.gameserver.model.zone.form;

import com.l2jfrozen.gameserver.model.zone.L2ZoneForm;

/**
 * A primitive rectangular zone
 * 
 * @author durgus
 */
public class ZoneCuboid extends L2ZoneForm
{
	private int _x1, _x2, _y1, _y2, _z1, _z2;

	public ZoneCuboid(int x1, int x2, int y1, int y2, int z1, int z2)
	{
		_x1 = x1;
		_x2 = x2;
		if(_x1 > _x2) // switch them if alignment is wrong
		{
			_x1 = x2;
			_x2 = x1;
		}

		_y1 = y1;
		_y2 = y2;
		if(_y1 > _y2) // switch them if alignment is wrong
		{
			_y1 = y2;
			_y2 = y1;
		}

		_z1 = z1;
		_z2 = z2;
		if(_z1 > _z2) // switch them if alignment is wrong
		{
			_z1 = z2;
			_z2 = z1;
		}
	}

	@Override
	public boolean isInsideZone(int x, int y, int z)
	{
		if(x < _x1 || x > _x2 || y < _y1 || y > _y2 || z < _z1 || z > _z2)
			return false;

		return true;
	}

	@Override
	public boolean intersectsRectangle(int ax1, int ax2, int ay1, int ay2)
	{
		// Check if any point inside this rectangle
		if(isInsideZone(ax1, ay1, (_z2 - 1)))
			return true;

		if(isInsideZone(ax1, ay2, (_z2 - 1)))
			return true;

		if(isInsideZone(ax2, ay1, (_z2 - 1)))
			return true;

		if(isInsideZone(ax2, ay2, (_z2 - 1)))
			return true;

		// Check if any point from this rectangle is inside the other one
		if(_x1 > ax1 && _x1 < ax2 && _y1 > ay1 && _y1 < ay2)
			return true;

		if(_x1 > ax1 && _x1 < ax2 && _y2 > ay1 && _y2 < ay2)
			return true;

		if(_x2 > ax1 && _x2 < ax2 && _y1 > ay1 && _y1 < ay2)
			return true;

		if(_x2 > ax1 && _x2 < ax2 && _y2 > ay1 && _y2 < ay2)
			return true;

		// Horizontal lines may intersect vertical lines
		if(lineIntersectsLine(_x1, _y1, _x2, _y1, ax1, ay1, ax1, ay2))
			return true;

		if(lineIntersectsLine(_x1, _y1, _x2, _y1, ax2, ay1, ax2, ay2))
			return true;

		if(lineIntersectsLine(_x1, _y2, _x2, _y2, ax1, ay1, ax1, ay2))
			return true;

		if(lineIntersectsLine(_x1, _y2, _x2, _y2, ax2, ay1, ax2, ay2))
			return true;

		// Vertical lines may intersect horizontal lines
		if(lineIntersectsLine(_x1, _y1, _x1, _y2, ax1, ay1, ax2, ay1))
			return true;

		if(lineIntersectsLine(_x1, _y1, _x1, _y2, ax1, ay2, ax2, ay2))
			return true;

		if(lineIntersectsLine(_x2, _y1, _x2, _y2, ax1, ay1, ax2, ay1))
			return true;

		if(lineIntersectsLine(_x2, _y1, _x2, _y2, ax1, ay2, ax2, ay2))
			return true;

		return false;
	}

	@Override
	public double getDistanceToZone(int x, int y)
	{
		// Since we aren't given a z coordinate to test against
		//	we just use the minimum z coordinate to prevent the
		//	function from saying we aren't in the zone because
		//	of a bad z coordinate.
		if(isInsideZone(x, y, _z1))
			return 0; // If you are inside the zone distance to zone is 0.

		double test, shortestDist = Math.pow(_x1 - x, 2) + Math.pow(_y1 - y, 2);

		test = Math.pow(_x1 - x, 2) + Math.pow(_y2 - y, 2);
		if(test < shortestDist)
		{
			shortestDist = test;
		}

		test = Math.pow(_x2 - x, 2) + Math.pow(_y1 - y, 2);
		if(test < shortestDist)
		{
			shortestDist = test;
		}

		test = Math.pow(_x2 - x, 2) + Math.pow(_y2 - y, 2);
		if(test < shortestDist)
		{
			shortestDist = test;
		}

		return Math.sqrt(shortestDist);
	}

	/* getLowZ() / getHighZ() - These two functions were added to cope with the demand of the new
	 * fishing algorithms, wich are now able to correctly place the hook in the water, thanks to getHighZ().
	 * getLowZ() was added, considering potential future modifications.
	 */
	@Override
	public int getLowZ()
	{
		return _z1;
	}

	@Override
	public int getHighZ()
	{
		return _z2;
	}
}
