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/// \file AMFImporter_Geometry.cpp
/// \brief Parsing data from geometry nodes.
/// \date 2016
/// \author smal.root@gmail.com

#ifndef ASSIMP_BUILD_NO_AMF_IMPORTER

#include "AMFImporter.hpp"
#include "AMFImporter_Macro.hpp"

namespace Assimp
{

// <mesh>
// </mesh>
// A 3D mesh hull.
// Multi elements - Yes.
// Parent element - <object>.
void AMFImporter::ParseNode_Mesh()
{
CAMFImporter_NodeElement* ne;

	// create new mesh object.
	ne = new CAMFImporter_NodeElement_Mesh(mNodeElement_Cur);
	// Check for child nodes
	if(!mReader->isEmptyElement())
	{
		bool vert_read = false;

		ParseHelper_Node_Enter(ne);
		MACRO_NODECHECK_LOOPBEGIN("mesh");
			if(XML_CheckNode_NameEqual("vertices"))
			{
				// Check if data already defined.
				if(vert_read) Throw_MoreThanOnceDefined("vertices", "Only one vertices set can be defined for <mesh>.");
				// read data and set flag about it
				ParseNode_Vertices();
				vert_read = true;

				continue;
			}

			if(XML_CheckNode_NameEqual("volume")) { ParseNode_Volume(); continue; }
		MACRO_NODECHECK_LOOPEND("mesh");
		ParseHelper_Node_Exit();
	}// if(!mReader->isEmptyElement())
	else
	{
		mNodeElement_Cur->Child.push_back(ne);// Add element to child list of current element
	}// if(!mReader->isEmptyElement()) else

	mNodeElement_List.push_back(ne);// and to node element list because its a new object in graph.
}

// <vertices>
// </vertices>
// The list of vertices to be used in defining triangles.
// Multi elements - No.
// Parent element - <mesh>.
void AMFImporter::ParseNode_Vertices()
{
CAMFImporter_NodeElement* ne;

	// create new mesh object.
	ne = new CAMFImporter_NodeElement_Vertices(mNodeElement_Cur);
	// Check for child nodes
	if(!mReader->isEmptyElement())
	{
		ParseHelper_Node_Enter(ne);
		MACRO_NODECHECK_LOOPBEGIN("vertices");
			if(XML_CheckNode_NameEqual("vertex")) { ParseNode_Vertex(); continue; }
		MACRO_NODECHECK_LOOPEND("vertices");
		ParseHelper_Node_Exit();
	}// if(!mReader->isEmptyElement())
	else
	{
		mNodeElement_Cur->Child.push_back(ne);// Add element to child list of current element
	}// if(!mReader->isEmptyElement()) else

	mNodeElement_List.push_back(ne);// and to node element list because its a new object in graph.
}

// <vertex>
// </vertex>
// A vertex to be referenced in triangles.
// Multi elements - Yes.
// Parent element - <vertices>.
void AMFImporter::ParseNode_Vertex()
{
CAMFImporter_NodeElement* ne;

	// create new mesh object.
	ne = new CAMFImporter_NodeElement_Vertex(mNodeElement_Cur);
	// Check for child nodes
	if(!mReader->isEmptyElement())
	{
		bool col_read = false;
		bool coord_read = false;

		ParseHelper_Node_Enter(ne);
		MACRO_NODECHECK_LOOPBEGIN("vertex");
			if(XML_CheckNode_NameEqual("color"))
			{
				// Check if data already defined.
				if(col_read) Throw_MoreThanOnceDefined("color", "Only one color can be defined for <vertex>.");
				// read data and set flag about it
				ParseNode_Color();
				col_read = true;

				continue;
			}

			if(XML_CheckNode_NameEqual("coordinates"))
			{
				// Check if data already defined.
				if(coord_read) Throw_MoreThanOnceDefined("coordinates", "Only one coordinates set can be defined for <vertex>.");
				// read data and set flag about it
				ParseNode_Coordinates();
				coord_read = true;

				continue;
			}

			if(XML_CheckNode_NameEqual("metadata")) { ParseNode_Metadata(); continue; }
		MACRO_NODECHECK_LOOPEND("vertex");
		ParseHelper_Node_Exit();
	}// if(!mReader->isEmptyElement())
	else
	{
		mNodeElement_Cur->Child.push_back(ne);// Add element to child list of current element
	}// if(!mReader->isEmptyElement()) else

	mNodeElement_List.push_back(ne);// and to node element list because its a new object in graph.
}

// <coordinates>
// </coordinates>
// Specifies the 3D location of this vertex.
// Multi elements - No.
// Parent element - <vertex>.
//
// Children elements:
//   <x>, <y>, <z>
//   Multi elements - No.
//   X, Y, or Z coordinate, respectively, of a vertex position in space.
void AMFImporter::ParseNode_Coordinates()
{
CAMFImporter_NodeElement* ne;

	// create new color object.
	ne = new CAMFImporter_NodeElement_Coordinates(mNodeElement_Cur);

	CAMFImporter_NodeElement_Coordinates& als = *((CAMFImporter_NodeElement_Coordinates*)ne);// alias for convenience

	// Check for child nodes
	if(!mReader->isEmptyElement())
	{
		bool read_flag[3] = { false, false, false };

		ParseHelper_Node_Enter(ne);
		MACRO_NODECHECK_LOOPBEGIN("coordinates");
			MACRO_NODECHECK_READCOMP_F("x", read_flag[0], als.Coordinate.x);
			MACRO_NODECHECK_READCOMP_F("y", read_flag[1], als.Coordinate.y);
			MACRO_NODECHECK_READCOMP_F("z", read_flag[2], als.Coordinate.z);
		MACRO_NODECHECK_LOOPEND("coordinates");
		ParseHelper_Node_Exit();
		// check that all components was defined
		if((read_flag[0] && read_flag[1] && read_flag[2]) == 0) throw DeadlyImportError("Not all coordinate's components are defined.");

	}// if(!mReader->isEmptyElement())
	else
	{
		mNodeElement_Cur->Child.push_back(ne);// Add element to child list of current element
	}// if(!mReader->isEmptyElement()) else

	mNodeElement_List.push_back(ne);// and to node element list because its a new object in graph.
}

// <volume
// materialid="" - Which material to use.
// type=""       - What this volume describes can be “region” or “support”. If none specified, “object” is assumed. If support, then the geometric
//                 requirements 1-8 listed in section 5 do not need to be maintained.
// >
// </volume>
// Defines a volume from the established vertex list.
// Multi elements - Yes.
// Parent element - <mesh>.
void AMFImporter::ParseNode_Volume()
{
std::string materialid;
std::string type;
CAMFImporter_NodeElement* ne;

	// Read attributes for node <color>.
	MACRO_ATTRREAD_LOOPBEG;
		MACRO_ATTRREAD_CHECK_RET("materialid", materialid, mReader->getAttributeValue);
		MACRO_ATTRREAD_CHECK_RET("type", type, mReader->getAttributeValue);
	MACRO_ATTRREAD_LOOPEND;

	// create new object.
	ne = new CAMFImporter_NodeElement_Volume(mNodeElement_Cur);
	// and assign read data
	((CAMFImporter_NodeElement_Volume*)ne)->MaterialID = materialid;
	((CAMFImporter_NodeElement_Volume*)ne)->Type = type;
	// Check for child nodes
	if(!mReader->isEmptyElement())
	{
		bool col_read = false;

		ParseHelper_Node_Enter(ne);
		MACRO_NODECHECK_LOOPBEGIN("volume");
			if(XML_CheckNode_NameEqual("color"))
			{
				// Check if data already defined.
				if(col_read) Throw_MoreThanOnceDefined("color", "Only one color can be defined for <volume>.");
				// read data and set flag about it
				ParseNode_Color();
				col_read = true;

				continue;
			}

			if(XML_CheckNode_NameEqual("triangle")) { ParseNode_Triangle(); continue; }
			if(XML_CheckNode_NameEqual("metadata")) { ParseNode_Metadata(); continue; }
		MACRO_NODECHECK_LOOPEND("volume");
		ParseHelper_Node_Exit();
	}// if(!mReader->isEmptyElement())
	else
	{
		mNodeElement_Cur->Child.push_back(ne);// Add element to child list of current element
	}// if(!mReader->isEmptyElement()) else

	mNodeElement_List.push_back(ne);// and to node element list because its a new object in graph.
}

// <triangle>
// </triangle>
// Defines a 3D triangle from three vertices, according to the right-hand rule (counter-clockwise when looking from the outside).
// Multi elements - Yes.
// Parent element - <volume>.
//
// Children elements:
//   <v1>, <v2>, <v3>
//   Multi elements - No.
//   Index of the desired vertices in a triangle or edge.
void AMFImporter::ParseNode_Triangle()
{
CAMFImporter_NodeElement* ne;

	// create new color object.
	ne = new CAMFImporter_NodeElement_Triangle(mNodeElement_Cur);

	CAMFImporter_NodeElement_Triangle& als = *((CAMFImporter_NodeElement_Triangle*)ne);// alias for convenience

	// Check for child nodes
	if(!mReader->isEmptyElement())
	{
		bool col_read = false, tex_read = false;
		bool read_flag[3] = { false, false, false };

		ParseHelper_Node_Enter(ne);
		MACRO_NODECHECK_LOOPBEGIN("triangle");
			if(XML_CheckNode_NameEqual("color"))
			{
				// Check if data already defined.
				if(col_read) Throw_MoreThanOnceDefined("color", "Only one color can be defined for <triangle>.");
				// read data and set flag about it
				ParseNode_Color();
				col_read = true;

				continue;
			}

			if(XML_CheckNode_NameEqual("texmap"))// new name of node: "texmap".
			{
				// Check if data already defined.
				if(tex_read) Throw_MoreThanOnceDefined("texmap", "Only one texture coordinate can be defined for <triangle>.");
				// read data and set flag about it
				ParseNode_TexMap();
				tex_read = true;

				continue;
			}
			else if(XML_CheckNode_NameEqual("map"))// old name of node: "map".
			{
				// Check if data already defined.
				if(tex_read) Throw_MoreThanOnceDefined("map", "Only one texture coordinate can be defined for <triangle>.");
				// read data and set flag about it
				ParseNode_TexMap(true);
				tex_read = true;

				continue;
			}

			MACRO_NODECHECK_READCOMP_U32("v1", read_flag[0], als.V[0]);
			MACRO_NODECHECK_READCOMP_U32("v2", read_flag[1], als.V[1]);
			MACRO_NODECHECK_READCOMP_U32("v3", read_flag[2], als.V[2]);
		MACRO_NODECHECK_LOOPEND("triangle");
		ParseHelper_Node_Exit();
		// check that all components was defined
		if((read_flag[0] && read_flag[1] && read_flag[2]) == 0) throw DeadlyImportError("Not all vertices of the triangle are defined.");

	}// if(!mReader->isEmptyElement())
	else
	{
		mNodeElement_Cur->Child.push_back(ne);// Add element to child list of current element
	}// if(!mReader->isEmptyElement()) else

	mNodeElement_List.push_back(ne);// and to node element list because its a new object in graph.
}

}// namespace Assimp

#endif // !ASSIMP_BUILD_NO_AMF_IMPORTER