#include "OgreSBBRenderTechnique.h"
#include "OgreTechniqueGroup.h"
#include "OgreIlluminationManager.h"
#include "OgreSceneCameraDepthRenderingRun.h"


OgreSBBRenderTechnique::OgreSBBRenderTechnique( unsigned char depthTexID,
											   bool bindTexture,
												Pass* pass,
												OgreRenderable* parentRenderable,
												OgreTechniqueGroup* parentTechniqueGroup)
							:RenderTechnique( parentRenderable, parentTechniqueGroup),
							OgreRenderTechnique(pass, parentRenderable, parentTechniqueGroup),
							SBBRenderTechnique(parentRenderable, parentTechniqueGroup)
{
	this->depthTexID = depthTexID;
	this->bindTexture = bindTexture;
	
	OgreIlluminationManager::getSingleton().createGlobalRun(ILLUMRUN_SCENE_CAMERA_DEPTH);	
	
	OgreSceneCameraDepthRenderingRun* run = (OgreSceneCameraDepthRenderingRun*)
		OgreIlluminationManager::getSingleton().getGlobalRun(ILLUMRUN_SCENE_CAMERA_DEPTH)->asOgreRenderingRun();

	Root::getSingleton().addFrameListener(this);
	OgreIlluminationManager::getSingleton().getMainViewport()
								->getTarget()->addListener(this);
	OgreIlluminationManager::getSingleton().addUpdateListener(this);
	
	if(bindTexture)
	pass->getTextureUnitState(depthTexID)->setTextureName(run->getDepthTextureName());
	
}

void OgreSBBRenderTechnique::preAllUpdates()
{
	lastVisibility = parentOgreRenderable->isVisible();
	parentOgreRenderable->setVisible(false);
}
void  OgreSBBRenderTechnique::preRenderTargetUpdate (const RenderTargetEvent &evt)
{
	//parentOgreRenderable->setVisible(lastVisibility);	
}
void  OgreSBBRenderTechnique::postRenderTargetUpdate (const RenderTargetEvent &evt)
{
	//parentOgreRenderable->setVisible(false);
}
bool  OgreSBBRenderTechnique::frameEnded (const FrameEvent &evt)
{
	
	return true;
}
void  OgreSBBRenderTechnique::postAllUpdates()
{
	parentOgreRenderable->setVisible(lastVisibility);	
}

OgreSBBRenderTechnique::~OgreSBBRenderTechnique()
{

}

void OgreSBBRenderTechnique::update(unsigned long frameNum)
{
	OgreIlluminationManager::getSingleton().updateGlobalRun(ILLUMRUN_SCENE_CAMERA_DEPTH, frameNum);	
}

namespace SBBParsers
{
///Technique parsers
	void parseDepthTexID(String& params, RenderTechniqueFactory* factory)
	{
		OgreSBBRenderTechniqueFactory* f = (OgreSBBRenderTechniqueFactory*) factory;
		f->depthTexID =  StringConverter::parseUnsignedInt(params);
	}
	void parseBindTexture(String& params, RenderTechniqueFactory* factory)
	{
		OgreSBBRenderTechniqueFactory* f = (OgreSBBRenderTechniqueFactory*) factory;
		f->bindTexture =  StringConverter::parseBool(params);
	}
}

OgreSBBRenderTechniqueFactory::OgreSBBRenderTechniqueFactory()
{
	typeName = "SphericalBillboard";
	
	using namespace SBBParsers;
	
	//register parsers
	this->attributeParsers.insert(AttribParserList::value_type("texture_unit_id", (ILLUM_ATTRIBUTE_PARSER) parseDepthTexID));
	this->attributeParsers.insert(AttribParserList::value_type("bind_texture", (ILLUM_ATTRIBUTE_PARSER) parseBindTexture));
}

OgreRenderTechnique* OgreSBBRenderTechniqueFactory::createInstance( 
										IllumTechniqueParams* params,
										Pass* pass,
										OgreRenderable* parentRenderable,
										OgreTechniqueGroup* parentTechniqueGroup)
{	
	//reset parameters
	depthTexID = 1;
	bindTexture = true;

	parseParams(params);

	OgreSBBRenderTechnique* result = new OgreSBBRenderTechnique(
												depthTexID,
												bindTexture,
												pass,
												parentRenderable,
												parentTechniqueGroup);
	return result;
}