//-----------------------------------------------------------------------------
// Copyright (c) 2012 GarageGames, LLC
//
// 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.
//-----------------------------------------------------------------------------

#include "T3D/lighting/skylight.h"
#include "math/mathIO.h"
#include "scene/sceneRenderState.h"
#include "console/consoleTypes.h"
#include "core/stream/bitStream.h"
#include "materials/baseMatInstance.h"
#include "console/engineAPI.h"
#include "gfx/gfxDrawUtil.h"
#include "gfx/gfxDebugEvent.h"
#include "gfx/gfxTransformSaver.h"
#include "math/mathUtils.h"
#include "gfx/bitmap/gBitmap.h"
#include "core/stream/fileStream.h"
#include "core/fileObject.h"
#include "core/resourceManager.h"
#include "console/simPersistID.h"
#include "T3D/gameFunctions.h"
#include "postFx/postEffect.h"
#include "renderInstance/renderProbeMgr.h"
#include "renderInstance/renderProbeMgr.h"

#include "math/util/sphereMesh.h"
#include "materials/materialManager.h"
#include "math/util/matrixSet.h"
#include "gfx/bitmap/cubemapSaver.h"

#include "materials/materialFeatureTypes.h"

#include "materials/shaderData.h"
#include "gfx/gfxTextureManager.h"

#include "gfx/bitmap/imageUtils.h"

#include "T3D/lighting/IBLUtilities.h"

extern bool gEditingMission;
extern ColorI gCanvasClearColor;
bool Skylight::smRenderSkylights = true;

IMPLEMENT_CO_NETOBJECT_V1(Skylight);

ConsoleDocClass(Skylight,
   "@brief An example scene object which renders a mesh.\n\n"
   "This class implements a basic SceneObject that can exist in the world at a "
   "3D position and render itself. There are several valid ways to render an "
   "object in Torque. This class implements the preferred rendering method which "
   "is to submit a MeshRenderInst along with a Material, vertex buffer, "
   "primitive buffer, and transform and allow the RenderMeshMgr handle the "
   "actual setup and rendering for you.\n\n"
   "See the C++ code for implementation details.\n\n"
   "@ingroup Examples\n");

//-----------------------------------------------------------------------------
// Object setup and teardown
//-----------------------------------------------------------------------------
Skylight::Skylight() : ReflectionProbe()
{
   mCaptureMask = SKYLIGHT_CAPTURE_TYPEMASK;
}

Skylight::~Skylight()
{
}

//-----------------------------------------------------------------------------
// Object Editing
//-----------------------------------------------------------------------------
void Skylight::initPersistFields()
{
   // SceneObject already handles exposing the transform
   Parent::initPersistFields();

   removeField("radius");
   removeField("scale");
   removeField("EditPosOffset");
   removeField("refOffset");
   removeField("refScale");
}

void Skylight::inspectPostApply()
{
   Parent::inspectPostApply();

   mDirty = true;

   // Flag the network mask to send the updates
   // to the client object
   setMaskBits(-1);
}

bool Skylight::onAdd()
{
   if (!Parent::onAdd())
      return false;

   return true;
}

void Skylight::onRemove()
{
   Parent::onRemove();
}

U32 Skylight::packUpdate(NetConnection *conn, U32 mask, BitStream *stream)
{
   // Allow the Parent to get a crack at writing its info
   U32 retMask = Parent::packUpdate(conn, mask, stream);

   return retMask;
}

void Skylight::unpackUpdate(NetConnection *conn, BitStream *stream)
{
   // Let the Parent read any info it sent
   Parent::unpackUpdate(conn, stream);

   if (mDirty)
   {
      updateProbeParams();
   }
}

//-----------------------------------------------------------------------------
// Object Rendering
//-----------------------------------------------------------------------------

void Skylight::updateProbeParams()
{
   mProbeShapeType = ProbeInfo::Skylight;
   Parent::updateProbeParams();
}

void Skylight::prepRenderImage(SceneRenderState *state)
{
   if (!mEnabled || !Skylight::smRenderSkylights)
      return;

   //special hook-in for skylights
   Point3F camPos = state->getCameraPosition();
   mProbeInfo.mBounds.setCenter(camPos);

   mProbeInfo.setPosition(camPos);

   //Submit our probe to actually do the probe action
   // Get a handy pointer to our RenderPassmanager
   //RenderPassManager *renderPass = state->getRenderPass();

   PROBEMGR->submitProbe(&mProbeInfo);

#ifdef TORQUE_TOOLS
   if (Skylight::smRenderPreviewProbes && gEditingMission && mEditorShapeInst && mPrefilterMap != nullptr)
   {
      GFXTransformSaver saver;

      // Calculate the distance of this object from the camera
      Point3F cameraOffset;
      getRenderTransform().getColumn(3, &cameraOffset);
      cameraOffset -= state->getDiffuseCameraPosition();
      F32 dist = cameraOffset.len();
      if (dist < 0.01f)
         dist = 0.01f;

      // Set up the LOD for the shape
      F32 invScale = (1.0f / getMax(getMax(mObjScale.x, mObjScale.y), mObjScale.z));

      mEditorShapeInst->setDetailFromDistance(state, dist * invScale);

      // Make sure we have a valid level of detail
      if (mEditorShapeInst->getCurrentDetail() < 0)
         return;

      BaseMatInstance* probePrevMat = mEditorShapeInst->getMaterialList()->getMaterialInst(0);

      setPreviewMatParameters(state, probePrevMat);

      // GFXTransformSaver is a handy helper class that restores
      // the current GFX matrices to their original values when
      // it goes out of scope at the end of the function

      // Set up our TS render state      
      TSRenderState rdata;
      rdata.setSceneState(state);
      rdata.setFadeOverride(1.0f);

      // We might have some forward lit materials
      // so pass down a query to gather lights.
      LightQuery query;
      query.init(getWorldSphere());
      rdata.setLightQuery(&query);

      // Set the world matrix to the objects render transform
      MatrixF mat = getRenderTransform();
      mat.scale(Point3F(1, 1, 1));
      GFX->setWorldMatrix(mat);

      // Animate the the shape
      mEditorShapeInst->animate();

      // Allow the shape to submit the RenderInst(s) for itself
      mEditorShapeInst->render(rdata);

      saver.restore();
   }

   // If the light is selected or light visualization
   // is enabled then register the callback.
   const bool isSelectedInEditor = (gEditingMission && isSelected());
   if (isSelectedInEditor)
   {
   }
#endif
}

void Skylight::setPreviewMatParameters(SceneRenderState* renderState, BaseMatInstance* mat)
{
   Parent::setPreviewMatParameters(renderState, mat);
}

DefineEngineMethod(Skylight, postApply, void, (), ,
   "A utility method for forcing a network update.\n")
{
   object->inspectPostApply();
}