/*
-----------------------------------------------------------------------------
This source file is part of OGRE
(Object-oriented Graphics Rendering Engine)
For the latest info, see http://www.ogre3d.org/

Copyright (c) 2000-2009 Torus Knot Software Ltd

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
-----------------------------------------------------------------------------
PCZone.cpp  -  description
-----------------------------------------------------------------------------
begin                : Tue Feb 20 2007
author               : Eric Cha
email                : ericc@xenopi.com
-----------------------------------------------------------------------------
*/

#include "OgrePCZone.h"
#include "OgreSceneNode.h"
#include "OgrePortal.h"
#include "OgrePCZSceneNode.h"
#include "OgrePCZSceneManager.h"

namespace Ogre
{

    PCZone::PCZone( PCZSceneManager * creator, const String& name ) 
    {
        mLastVisibleFrame = 0;
		mLastVisibleFromCamera = 0;
		mName = name;
		mZoneTypeName = "ZoneType_Undefined";
		mEnclosureNode = 0;
		mPCZSM = creator;
		mHasSky = false;
	}

	PCZone::~PCZone()
	{
	}

	/** Remove all nodes from the node reference list and clear it
	*/
	void PCZone::_clearNodeLists(short type)
	{
		if (type & HOME_NODE_LIST)
		{
			mHomeNodeList.clear();
		}
		if (type & VISITOR_NODE_LIST)
		{
			mVisitorNodeList.clear();
		}
	}

	Portal * PCZone::findMatchingPortal(Portal * portal)
	{
		// look through all the portals in zone2 for a match
		Portal* portal2;
		PortalList::iterator pi2, piend2;
		piend2 = mPortals.end();
		for (pi2 = mPortals.begin(); pi2 != piend2; pi2++)
		{
			portal2 = *pi2;
			//portal2->updateDerivedValues();
			if (portal2->getTargetZone() == 0 && portal2->closeTo(portal) &&
				portal2->getDerivedDirection().dotProduct(portal->getDerivedDirection()) < -0.9)
			{
				// found a match!
				return portal2;
			}
		}
		// no match
		return 0;
	}


	/* Add a portal to the zone */
	void PCZone::_addPortal(Portal * newPortal)
	{
		if (newPortal)
		{
			// make sure portal is unique (at least in this zone)
			PortalList::iterator it = std::find(mPortals.begin(), mPortals.end(), newPortal);
			if (it != mPortals.end())
			{
				OGRE_EXCEPT(
					Exception::ERR_DUPLICATE_ITEM,
					"A portal with the name " + newPortal->getName() + " already exists",
					"PCZone::_addPortal" );
			}

			// add portal to portals list
			mPortals.push_back(newPortal);

			// tell the portal which zone it's currently in
			newPortal->setCurrentHomeZone(this);
		}
	}

	/* Remove a portal from the zone (does not erase the portal object, just removes reference) */
	void PCZone::_removePortal(Portal * removePortal)
	{
		if (removePortal)
		{
			mPortals.erase(std::find(mPortals.begin(), mPortals.end(), removePortal));
		}
	}

	/* Add an anti portal to the zone */
	void PCZone::_addAntiPortal(AntiPortal* newAntiPortal)
	{
		if (newAntiPortal)
		{
			// make sure portal is unique (at least in this zone)
			AntiPortalList::iterator it = std::find(mAntiPortals.begin(), mAntiPortals.end(), newAntiPortal);
			if (it != mAntiPortals.end())
			{
				OGRE_EXCEPT(
					Exception::ERR_DUPLICATE_ITEM,
					"An anti portal with the name " + newAntiPortal->getName() + " already exists",
					"PCZone::_addAntiPortal" );
			}

			// add portal to portals list
			mAntiPortals.push_back(newAntiPortal);

			// tell the portal which zone it's currently in
			newAntiPortal->setCurrentHomeZone(this);
		}
	}

	/* Remove an anti portal from the zone */
	void PCZone::_removeAntiPortal(AntiPortal* removeAntiPortal)
	{
		if (removeAntiPortal)
		{
			mAntiPortals.erase(std::find(mAntiPortals.begin(), mAntiPortals.end(), removeAntiPortal));
		}
	}

	/* create node specific zone data if necessary
	*/
	void PCZone::createNodeZoneData(PCZSceneNode *)
	{
	}

	/* get the aabb of the zone - default implementation
	   uses the enclosure node, but there are other perhaps
	   better ways
	*/
	void PCZone::getAABB(AxisAlignedBox & aabb)
	{
		// if there is no node, just return a null box
		if (mEnclosureNode == 0)
		{
			aabb.setNull();
		}
		else
		{
			aabb = mEnclosureNode->_getWorldAABB();
			// since this is the "local" AABB, subtract out any translations
			aabb.setMinimum(aabb.getMinimum() - mEnclosureNode->_getDerivedPosition());
			aabb.setMaximum(aabb.getMaximum() - mEnclosureNode->_getDerivedPosition());
		}
		return;
	}

	/***********************************************************************\
	ZoneData - Zone-specific Data structure for Scene Nodes
    ************************************************************************/

	ZoneData::ZoneData(PCZSceneNode * node, PCZone * zone)
	{
		mAssociatedZone = zone;
		mAssociatedNode = node;
	}

	ZoneData::~ZoneData()
	{
	}

	void ZoneData::update(void)
	{
	}
}
