#include <OgreNoMemoryMacros.h>
#include <CEGUI/CEGUI.h>
#include <../CEGUIRenderer/include/OgreCEGUIRenderer.h>
#include <../CEGUIRenderer/include/OgreCEGUIResourceProvider.h>
#include <../CEGUIRenderer/include/OgreCEGUITexture.h>
#include <OgreMemoryMacros.h>

#include <Ogre.h>
//#include "OgreReferenceAppLayer.h"
//#include "OgreRefAppWorld.h"
#include "TestCullingTerrainApplication.h"


#define WIN32_LEAN_AND_MEAN
#include <windows.h>

/*******************************************************/
/*     TestCullingTerrainApplication implementation    */
/*******************************************************/

//-----------------------------------------------------------------------
TestCullingTerrainApplication::~TestCullingTerrainApplication()
{
	if (mTerrainContentGenerator)
	{
		delete mTerrainContentGenerator;
		mTerrainContentGenerator = NULL;
	}
	//if(mRenderTargetListener)	delete mRenderTargetListener;
}
//-----------------------------------------------------------------------
void TestCullingTerrainApplication::createCamera()
{
	// create the camera
	mCamera = mSceneMgr->createCamera("PlayerCam");
	
	/** set a nice viewpoint
	*	we use a camera node here and apply all transformations on it instead
	*	of applying all transformations directly to the camera
	*	because then the camera is displayed correctly in the visualization
	*/
	mCamNode = mSceneMgr->getRootSceneNode()->createChildSceneNode(
		"CamNode1", Vector3(707, 5000, 528));
	//mCamera->setPosition(707, 5000, 528);
	mCamNode->setOrientation(Quaternion(-0.3486, 0.0122, 0.9365, 0.0329));
	mCamNode->attachObject(mCamera);

	//-- create visualization camera
	mVizCamera = mSceneMgr->createCamera("VizCam");
	mVizCamera->setPosition(mCamNode->getPosition());

	mVizCamera->setNearClipDistance(1);
	mCamera->setNearClipDistance(1);

	// infinite far plane?
	if (mRoot->getRenderSystem()->getCapabilities()->hasCapability(RSC_INFINITE_FAR_PLANE))
	{
		mVizCamera->setFarClipDistance(0);
		mCamera->setFarClipDistance(0);
	}
	else
	{
		 mVizCamera->setFarClipDistance(20000);
		 mCamera->setFarClipDistance(20000);
	}	
}

//-----------------------------------------------------------------------
bool TestCullingTerrainApplication::setup()
{
	bool result = ExampleApplication::setup();

	createRenderTargetListener();

	return result;
}
//-----------------------------------------------------------------------
void TestCullingTerrainApplication::createRenderTargetListener()
{
	mWindow->addListener(new VisualizationRenderTargetListener(mSceneMgr));
}
//-----------------------------------------------------------------------
void TestCullingTerrainApplication::createScene()
{
	// Set ambient light
	mSceneMgr->setAmbientLight(ColourValue(0.5, 0.5, 0.5));
	
	//-- create light
	mSunLight = mSceneMgr->createLight("SunLight");
	mSunLight->setType(Light::LT_DIRECTIONAL);
	//mSunLight->setType(Light::LT_SPOTLIGHT);
	//mSunLight->setSpotlightRange(Degree(30), Degree(50));

    mSunLight->setPosition(707, 2000, 500);
	mSunLight->setCastShadows(true);

	Vector3 dir(0.5, 1, 0.5);
	dir.normalise();
	mSunLight->setDirection(dir);
	//mSunLight->setDirection(Vector3::NEGATIVE_UNIT_Y);

	mSunLight->setDiffuseColour(1, 1, 1);
	mSunLight->setSpecularColour(1, 1, 1);

	// --Fog
	// NB it's VERY important to set this before calling setWorldGeometry 
	// because the vertex program picked will be different
	ColourValue fadeColour(0.93, 0.86, 0.76);
	mWindow->getViewport(0)->setBackgroundColour(fadeColour);
	//mSceneMgr->setFog( FOG_LINEAR, fadeColour, .001, 500, 1000);
	
	// Create a skybox
	mSceneMgr->setSkyBox(true, "Examples/SpaceSkyBox", 5000, false);
	
	std::string terrain_cfg("terrain.cfg");
#if OGRE_PLATFORM == OGRE_PLATFORM_APPLE
	terrain_cfg = mResourcePath + terrain_cfg;
#endif
	mSceneMgr->setWorldGeometry(terrain_cfg);
	
	//-- CEGUI setup
	setupGui();

	// Floor plane
	/*
	Plane plane;
	plane.normal = Vector3::UNIT_Y;
	plane.d = -60;
	MeshManager::getSingleton().createPlane("Myplane",
		ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME, plane,
		5000,5000,100,100,true,1,5,5,Vector3::UNIT_Z);
	Entity* pPlaneEnt = mSceneMgr->createEntity( "plane", "Myplane" );
	pPlaneEnt->setMaterialName("Examples/Rockwall");
	pPlaneEnt->setCastShadows(true);
	mSceneMgr->getRootSceneNode()->createChildSceneNode()->attachObject(pPlaneEnt);
	*/

	if (mRoot->getRenderSystem()->getCapabilities()->hasCapability(RSC_HWRENDER_TO_TEXTURE))
    {
		// In D3D, use a 1024x1024 shadow texture
		mSceneMgr->setShadowTextureSettings(1024, 2);
	}
	else
	{
		// Use 512x512 texture in GL since we can't go higher than the window res
		mSceneMgr->setShadowTextureSettings(512, 2);
	}
	//mSceneMgr->setShadowColour(ColourValue(0, 0, 0));
	mSceneMgr->setShadowColour(ColourValue(0.5, 0.5, 0.5));
    // mSceneMgr->setShowDebugShadows(true);


	//-- terrain content setup

	// HACK: necessary to call once before the content creation for
	// terrain initialisation
	mSceneMgr->_renderScene(mCamera, mWindow->getViewport(0), true);

	mTerrainContentGenerator = new TerrainContentGenerator(mSceneMgr);
	
	// if no objects file generate yourself
	if (!mTerrainContentGenerator->LoadObjects("objects.out"))
	{
		// height is restricted to 50, so no objects appear on peaks 
		// => there is much occlusion
		mTerrainContentGenerator->SetMaxPos(Vector3(3000.0f, 50.0f, 3000.0f));
		mTerrainContentGenerator->SetOffset(0);

		// the objects are generated on the whole terrain
		mTerrainContentGenerator->GenerateScene(1500, "robot");
		//mTerrainContentGenerator->GenerateScene(1500, "athene");
		//mTerrainContentGenerator->GenerateScene(500, "ninja");
	}

	// no limitations needed anymore: the user can set 
	// objects also on peaks of terrain
	mTerrainContentGenerator->SetMaxPos(Vector3(3000.0f, 5000.0f, 3000.0f));
}
//-----------------------------------------------------------------------
void TestCullingTerrainApplication::setupGui()
{
	 mGUIRenderer = new CEGUI::OgreCEGUIRenderer(mWindow, Ogre::RENDER_QUEUE_OVERLAY, 
		 false, 3000, ST_EXTERIOR_CLOSE);
     mGUISystem = new CEGUI::System(mGUIRenderer);

	 // Mouse
     CEGUI::SchemeManager::getSingleton().loadScheme((CEGUI::utf8*)"TaharezLook.scheme");
     CEGUI::MouseCursor::getSingleton().setImage("TaharezLook", "MouseArrow");
	 mGUISystem->setDefaultMouseCursor(
                (CEGUI::utf8*)"TaharezLook", (CEGUI::utf8*)"MouseArrow");

	 CEGUI::MouseCursor::getSingleton().show();
}
//-----------------------------------------------------------------------
void TestCullingTerrainApplication::createFrameListener()
{
	mTerrainFrameListener = new TerrainMouseQueryListener(mWindow, mCamera, mSceneMgr, 
		mGUIRenderer, mTerrainContentGenerator, mVizCamera, mCamNode, mSunLight);
	
	mRoot->addFrameListener(mTerrainFrameListener);
}
//-----------------------------------------------------------------------
void TestCullingTerrainApplication::chooseSceneManager()
{
	mSceneMgr = mRoot->getSceneManager(ST_EXTERIOR_CLOSE);
}


/**************************************************************/
/*      VisualizationRenderTargetListener implementation      */
/**************************************************************/
//-----------------------------------------------------------------------
VisualizationRenderTargetListener::VisualizationRenderTargetListener(SceneManager *sceneMgr)
:RenderTargetListener(), mSceneMgr(sceneMgr)
{
}
//-----------------------------------------------------------------------
void VisualizationRenderTargetListener::preViewportUpdate(const RenderTargetViewportEvent &evt)
{
	const bool showViz = evt.source->getZOrder() == VIZ_VIEWPORT_Z_ORDER; // visualization viewport
	const bool nShowViz = !showViz;

	// ambient light must be full for visualization
    if (showViz)
	{
		mSceneMgr->setAmbientLight(ColourValue(1, 1, 1));
	}
	else
	{
		mSceneMgr->setAmbientLight(ColourValue(0.5, 0.5, 0.5));
	}

    mSceneMgr->setOption("ShowVisualization", &showViz);
	mSceneMgr->setOption("SkyBoxEnabled", &nShowViz);
	//mSceneMgr->setOption("SkyPlaneEnabled", &showViz);
	
	RenderTargetListener::preViewportUpdate(evt);
}
//-----------------------------------------------------------------------
void VisualizationRenderTargetListener::postRenderTargetUpdate(const RenderTargetEvent &evt)
{
	RenderTargetListener::postRenderTargetUpdate(evt);
}
//-----------------------------------------------------------------------
INT WINAPI WinMain( HINSTANCE hInst, HINSTANCE, LPSTR strCmdLine, INT )
{
    // Create application object
    TestCullingTerrainApplication app;

	try 
	{
        app.go();
    } 
	catch( Ogre::Exception& e ) 
	{
        MessageBox( NULL, e.getFullDescription().c_str(), 
			"An exception has occured!", MB_OK | MB_ICONERROR | MB_TASKMODAL);
    }	

    return 0;
}