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/// \file AMFImporter_Node.hpp
/// \brief Elements of scene graph.
/// \date 2016
/// \author smal.root@gmail.com

#pragma once
#ifndef INCLUDED_AI_AMF_IMPORTER_NODE_H
#define INCLUDED_AI_AMF_IMPORTER_NODE_H

// Header files, Assimp.
#include <assimp/scene.h>
#include <assimp/types.h>

#include <list>
#include <string>
#include <vector>

/// Base class for elements of nodes.
class AMFNodeElementBase {
public:
	/// Define what data type contain node element.
	enum EType {
		ENET_Color, ///< Color element: <color>.
		ENET_Constellation, ///< Grouping element: <constellation>.
		ENET_Coordinates, ///< Coordinates element: <coordinates>.
		ENET_Edge, ///< Edge element: <edge>.
		ENET_Instance, ///< Grouping element: <constellation>.
		ENET_Material, ///< Material element: <material>.
		ENET_Metadata, ///< Metadata element: <metadata>.
		ENET_Mesh, ///< Metadata element: <mesh>.
		ENET_Object, ///< Element which hold object: <object>.
		ENET_Root, ///< Root element: <amf>.
		ENET_Triangle, ///< Triangle element: <triangle>.
		ENET_TexMap, ///< Texture coordinates element: <texmap> or <map>.
		ENET_Texture, ///< Texture element: <texture>.
		ENET_Vertex, ///< Vertex element: <vertex>.
		ENET_Vertices, ///< Vertex element: <vertices>.
		ENET_Volume, ///< Volume element: <volume>.

		ENET_Invalid ///< Element has invalid type and possible contain invalid data.
	};

	const EType Type; ///< Type of element.
	std::string ID; ///< ID of element.
	AMFNodeElementBase *Parent; ///< Parent element. If nullptr then this node is root.
	std::list<AMFNodeElementBase *> Child; ///< Child elements.

public: /// Destructor, virtual..
	virtual ~AMFNodeElementBase() = default;

	/// Disabled copy constructor and co.
	AMFNodeElementBase(const AMFNodeElementBase &pNodeElement) = delete;
	AMFNodeElementBase(AMFNodeElementBase &&) = delete;
	AMFNodeElementBase &operator=(const AMFNodeElementBase &pNodeElement) = delete;
	AMFNodeElementBase() = delete;

protected:
	/// In constructor inheritor must set element type.
	/// \param [in] pType - element type.
	/// \param [in] pParent - parent element.
	AMFNodeElementBase(const EType pType, AMFNodeElementBase *pParent) :
			Type(pType), Parent(pParent) {
		// empty
	}
}; // class IAMFImporter_NodeElement

/// A collection of objects or constellations with specific relative locations.
struct AMFConstellation : public AMFNodeElementBase {
	/// Constructor.
	/// \param [in] pParent - pointer to parent node.
	AMFConstellation(AMFNodeElementBase *pParent) :
			AMFNodeElementBase(ENET_Constellation, pParent) {}

}; // struct CAMFImporter_NodeElement_Constellation

/// Part of constellation.
struct AMFInstance : public AMFNodeElementBase {

	std::string ObjectID; ///< ID of object for instantiation.
	/// \var Delta - The distance of translation in the x, y, or z direction, respectively, in the referenced object's coordinate system, to
	/// create an instance of the object in the current constellation.
	aiVector3D Delta;

	/// \var Rotation - The rotation, in degrees, to rotate the referenced object about its x, y, and z axes, respectively, to create an
	/// instance of the object in the current constellation. Rotations shall be executed in order of x first, then y, then z.
	aiVector3D Rotation;

	/// Constructor.
	/// \param [in] pParent - pointer to parent node.
	AMFInstance(AMFNodeElementBase *pParent) :
			AMFNodeElementBase(ENET_Instance, pParent) {}
};

/// Structure that define metadata node.
struct AMFMetadata : public AMFNodeElementBase {

	std::string Type; ///< Type of "Value".
	std::string Value; ///< Value.

	/// Constructor.
	/// \param [in] pParent - pointer to parent node.
	AMFMetadata(AMFNodeElementBase *pParent) :
			AMFNodeElementBase(ENET_Metadata, pParent) {}
};

/// Structure that define root node.
struct AMFRoot : public AMFNodeElementBase {

	std::string Unit; ///< The units to be used. May be "inch", "millimeter", "meter", "feet", or "micron".
	std::string Version; ///< Version of format.

	/// Constructor.
	/// \param [in] pParent - pointer to parent node.
	AMFRoot(AMFNodeElementBase *pParent) :
			AMFNodeElementBase(ENET_Root, pParent) {}
};

/// Structure that define object node.
struct AMFColor : public AMFNodeElementBase {
	bool Composed; ///< Type of color stored: if true then look for formula in \ref Color_Composed[4], else - in \ref Color.
	std::string Color_Composed[4]; ///< By components formulas of composed color. [0..3] - RGBA.
	aiColor4D Color; ///< Constant color.
	std::string Profile; ///< The ICC color space used to interpret the three color channels r, g and b..

	/// @brief  Constructor.
	/// @param [in] pParent - pointer to parent node.
	AMFColor(AMFNodeElementBase *pParent) :
			AMFNodeElementBase(ENET_Color, pParent), Composed(false), Color() {
		// empty
	}
};

/// Structure that define material node.
struct AMFMaterial : public AMFNodeElementBase {

	/// Constructor.
	/// \param [in] pParent - pointer to parent node.
	AMFMaterial(AMFNodeElementBase *pParent) :
			AMFNodeElementBase(ENET_Material, pParent) {}
};

/// Structure that define object node.
struct AMFObject : public AMFNodeElementBase {

	/// Constructor.
	/// \param [in] pParent - pointer to parent node.
	AMFObject(AMFNodeElementBase *pParent) :
			AMFNodeElementBase(ENET_Object, pParent) {}
};

/// \struct CAMFImporter_NodeElement_Mesh
/// Structure that define mesh node.
struct AMFMesh : public AMFNodeElementBase {
	/// Constructor.
	/// \param [in] pParent - pointer to parent node.
	AMFMesh(AMFNodeElementBase *pParent) :
			AMFNodeElementBase(ENET_Mesh, pParent) {}
};

/// Structure that define vertex node.
struct AMFVertex : public AMFNodeElementBase {
	/// Constructor.
	/// \param [in] pParent - pointer to parent node.
	AMFVertex(AMFNodeElementBase *pParent) :
			AMFNodeElementBase(ENET_Vertex, pParent) {}
};

/// Structure that define edge node.
struct AMFEdge : public AMFNodeElementBase {
	/// Constructor.
	/// \param [in] pParent - pointer to parent node.
	AMFEdge(AMFNodeElementBase *pParent) :
			AMFNodeElementBase(ENET_Edge, pParent) {}
};

/// Structure that define vertices node.
struct AMFVertices : public AMFNodeElementBase {
	/// Constructor.
	/// \param [in] pParent - pointer to parent node.
	AMFVertices(AMFNodeElementBase *pParent) :
			AMFNodeElementBase(ENET_Vertices, pParent) {}
};

/// Structure that define volume node.
struct AMFVolume : public AMFNodeElementBase {
	std::string MaterialID; ///< Which material to use.
	std::string Type; ///< What this volume describes can be "region" or "support". If none specified, "object" is assumed.

	/// Constructor.
	/// \param [in] pParent - pointer to parent node.
	AMFVolume(AMFNodeElementBase *pParent) :
			AMFNodeElementBase(ENET_Volume, pParent) {}
};

/// Structure that define coordinates node.
struct AMFCoordinates : public AMFNodeElementBase {
	aiVector3D Coordinate; ///< Coordinate.

	/// Constructor.
	/// \param [in] pParent - pointer to parent node.
	AMFCoordinates(AMFNodeElementBase *pParent) :
			AMFNodeElementBase(ENET_Coordinates, pParent) {}
};

/// Structure that define texture coordinates node.
struct AMFTexMap : public AMFNodeElementBase {
	aiVector3D TextureCoordinate[3]; ///< Texture coordinates.
	std::string TextureID_R; ///< Texture ID for red color component.
	std::string TextureID_G; ///< Texture ID for green color component.
	std::string TextureID_B; ///< Texture ID for blue color component.
	std::string TextureID_A; ///< Texture ID for alpha color component.

	/// Constructor.
	/// \param [in] pParent - pointer to parent node.
	AMFTexMap(AMFNodeElementBase *pParent) :
			AMFNodeElementBase(ENET_TexMap, pParent), TextureCoordinate{} {
		// empty
	}
};

/// Structure that define triangle node.
struct AMFTriangle : public AMFNodeElementBase {
	size_t V[3]; ///< Triangle vertices.

	/// Constructor.
	/// \param [in] pParent - pointer to parent node.
	AMFTriangle(AMFNodeElementBase *pParent) :
			AMFNodeElementBase(ENET_Triangle, pParent) {
		// empty
	}
};

/// Structure that define texture node.
struct AMFTexture : public AMFNodeElementBase {
	size_t Width, Height, Depth; ///< Size of the texture.
	std::vector<uint8_t> Data; ///< Data of the texture.
	bool Tiled;

	/// Constructor.
	/// \param [in] pParent - pointer to parent node.
	AMFTexture(AMFNodeElementBase *pParent) :
			AMFNodeElementBase(ENET_Texture, pParent), Width(0), Height(0), Depth(0), Data(), Tiled(false) {
		// empty
	}
};

#endif // INCLUDED_AI_AMF_IMPORTER_NODE_H
