/****************************************************************************
Copyright (c) 2011-2013,WebJet Business Division,CYOU

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THE SOFTWARE.
****************************************************************************/
#include "stdneb.h"
#include "Material.h"

#include "memory/memory.h"

namespace Graphic
{
	GPtr<GlobalMaterialParam> Material::pGMP = 0;
	__ImplementClass(Material,'GMAT',Core::RefCounted)
		Material::Material() 
		:m_shaderInstacneID(0)
	{
		//empty
	}

	Material::~Material()
	{
		Discard();
	}

	void Material::Clone(const GPtr<Material>& from)
	{
		m_name = from->GetName();
		m_shaderInstacneID = from->GetShaderInstanceID();
		_CloneParamList(from->GetParamList());
		_CloneTechList(from->GetTechList());
		m_renderQueue = from->GetRenderQueue();
	}

	void Material::Discard()
	{
		for (SizeT i = 0; i < m_techList.Size(); ++i)
		{
			m_techList[i] = 0;
		}
		m_fallBackTech = 0;

		_DiscardMaterialParamList();
	}
	Util::Dictionary<IndexT, IndexT> Material::GetRegisterIndex(const Util::String& name, ShaderCodeType area,  IndexT iPass) const
	{
		Util::Dictionary<IndexT, IndexT> subShader2RegIdx;
		IndexT nSlot = -1;

		const MaterialTechList& techList = GetTechList();
		for (IndexT iTech = 0; iTech < techList.Size(); ++iTech)
		{
			const Util::Array< GPtr<Graphic::MaterialPass> >& passList = techList[iTech]->GetPassList();

			//all subshader in one pass
			const Util::Dictionary<uint, GPtr<ShaderParamBindingMap> >& _shaderParamBindingMap = passList[iPass]->GetShaderParamBindingMap();
			for ( IndexT i = 0; i < _shaderParamBindingMap.Size(); i++ )
			{
				uint shaderMaskKey = _shaderParamBindingMap.KeyAtIndex(i);
				const GPtr<Graphic::ShaderParamBindingMap>& spMap = _shaderParamBindingMap.ValueAtIndex(i);

				const Graphic::ShaderParamBindingList& spList    = spMap->GetShaderParamBindingList();
				ShaderParamList& bindList = spList[area];

				for (IndexT i = 0; i < bindList.Size(); ++i)
				{
					if (bindList[i].GetName() == name)
					{
						nSlot = bindList[i].GetRegister();
						subShader2RegIdx.Add(shaderMaskKey,nSlot);
						break;
					}
				}

			}
			//const GPtr<Graphic::ShaderParamBindingMap>& spMap = passList[iPass]->GetParamBindings(0);
			//const Graphic::ShaderParamBindingList& spList    = spMap->GetShaderParamBindingList();
			//ShaderParamList& bindList = spList[area];

			//for (IndexT i = 0; i < bindList.Size(); ++i)
			//{
			//	if (bindList[i].GetName() == name)
			//	{
			//		nSlot = bindList[i].GetRegister();
			//		return nSlot;
			//	}
			//}
		}

		return subShader2RegIdx;
	}
	//------------------------------------------------------------------------
	void 
		Material::_DiscardMaterialParamList()
	{
		if ( m_paramList.IsEmpty() )
		{
			return;
		}

		SizeT count = m_paramList.Size();
		for ( IndexT i = 0; i < count; ++i )
		{
			n_delete(m_paramList[i]);
		}
		m_paramList.Clear();
	}

	//------------------------------------------------------------------------
	/*
	这个函数只有从shader创建material模板的时候会调用。应该是clone。以免错误的删除内存
	*/
	void Material::AddParams(const MaterialParamList& param)
	{
		_CloneParamList(param);
		//m_paramList = param;
	}

	//------------------------------------------------------------------------
	void Material::_CloneParamList(const MaterialParamList& param)
	{
		_DiscardMaterialParamList();

		for (SizeT i = 0;i < param.Size();++i)
		{
			switch (param[i]->GetType())
			{
			case eMaterialParamFloat:
				{
					MaterialParamFloat* mpf = n_new( MaterialParamFloat );
					*mpf = *(static_cast<MaterialParamFloat*>(param[i]));
					m_paramList.Append(mpf);
				}
				break;
			case eMaterialParamVector:
				{
					MaterialParamVector* mpf = n_new( MaterialParamVector );
					*mpf = *(static_cast<MaterialParamVector*>(param[i]));
					m_paramList.Append(mpf);
				}
				break;
			case eMaterialParamMatrix:
				{
					MaterialParamMatrix* mpf = n_new( MaterialParamMatrix );
					*mpf = *(static_cast<MaterialParamMatrix*>(param[i]));
					m_paramList.Append(mpf);
				}
				break;
			case eMaterialParamTexture1D:
				{
					MaterialParamTex1D* mpf = n_new( MaterialParamTex1D );
					*mpf = *(static_cast<MaterialParamTex1D*>(param[i]));
					m_paramList.Append(mpf);
				}
				break;
			case eMaterialParamTexture2D:
				{
					MaterialParamTex2D* mpf = n_new( MaterialParamTex2D );
					*mpf = *(static_cast<MaterialParamTex2D*>(param[i]));
					m_paramList.Append(mpf);
				}
				break;
			case eMaterialParamTexture3D:
				{
					MaterialParamTex3D* mpf = n_new( MaterialParamTex3D );
					*mpf = *(static_cast<MaterialParamTex3D*>(param[i]));
					m_paramList.Append(mpf);
				}
				break;
			case eMaterialParamTextureCUBE:
				{
					MaterialParamTexCube* mpf = n_new( MaterialParamTexCube );
					*mpf = *(static_cast<MaterialParamTexCube*>(param[i]));
					m_paramList.Append(mpf);
				}
				break;
			default:
				n_error("TODO: MaterialInstance::CopyParams(): current material parameter is not implemented!\n");
				break;
			}

		}
	}

	void Material::_CloneTechList(const MaterialTechList& from)
	{
		m_techList.Clear();

		for (SizeT i = 0; i < from.Size(); ++i)
		{
			GPtr<MaterialTech> tech = MaterialTech::Create();
			tech->Clone(from[i]);
			m_techList.Append(tech);
		}
	}

	//------------------------------------------------------------------------
	// 构建shader参数和寄存器的绑定表。 外部不要调用
	void Material::_BuildBindingMap()
	{
		for( IndexT i = 0; i < m_techList.Size(); ++i )
		{
			m_techList[i]->_BuildBindingMap( this );
		}
	}

	template<typename MP_Type>
	inline ParamFindResult _find(MaterialParameterType type, const Util::String& paramName, MaterialParamList& list, MP_Type*& param)
	{
		MaterialParamList::Iterator begin = list.Begin();
		MaterialParamList::Iterator end = list.End();
		while(begin != end)
		{
			if ((*begin)->GetName() == paramName)
			{ 
				if((*begin)->GetType() == type)
				{
					param = static_cast<MP_Type*>(*begin);
					return ePFR_Succeed;
				}
				return ePFR_TypeError;
			}
			++begin;
		}
		return ePFR_NotFound;
	}
	ParamFindResult Material::find(const Util::String& paramName, MaterialParam*& param)
	{
		MaterialParamList::Iterator begin = m_paramList.Begin();
		MaterialParamList::Iterator end = m_paramList.End();
		while(begin != end)
		{
			if ((*begin)->GetName() == paramName)
			{ 
				param = (*begin);
				return ePFR_Succeed;

			}
			++begin;
		}
		return ePFR_NotFound;
	}

	ParamFindResult Material::findFloat(const Util::String& paramName, MaterialParamFloat*& param)
	{
		return _find(eMaterialParamFloat, paramName, m_paramList, param);
	}

	ParamFindResult Material::findVector(const Util::String& paramName, MaterialParamVector*& param)
	{
		return _find(eMaterialParamVector, paramName, m_paramList, param);
	}

	ParamFindResult Material::findMatrix(const Util::String& paramName, MaterialParamMatrix*& param)
	{
		return _find(eMaterialParamMatrix, paramName, m_paramList, param);
	}
	ParamFindResult Material::findTexture(const Util::String& paramName, MaterialParamTexture*& param)
	{
		MaterialParamList::Iterator begin = m_paramList.Begin();
		MaterialParamList::Iterator end = m_paramList.End();
		while(begin != end)
		{
			if ((*begin)->GetName() == paramName)
			{ 
				switch((*begin)->GetType())
				{
				case eMaterialParamTexture1D:
				case eMaterialParamTexture2D:
				case eMaterialParamTexture3D:
				case eMaterialParamTextureCUBE:
					{
						param = static_cast<MaterialParamTexture*>(*begin);					
						return ePFR_Succeed;
					}
				default:
					{
						break;
					}

				}
				return ePFR_TypeError;
			}
			++begin;
		}
		return ePFR_NotFound;
	}
}