/*
Open Asset Import Library (assimp)
----------------------------------------------------------------------

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  copyright notice, this list of conditions and the
  following disclaimer.

* Redistributions in binary form must reproduce the above
  copyright notice, this list of conditions and the
  following disclaimer in the documentation and/or other
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* Neither the name of the assimp team, nor the names of its
  contributors may be used to endorse or promote products
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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----------------------------------------------------------------------
*/

/** @file  PLYLoader.h
 *  @brief Declaration of the .ply importer class.
 */
#pragma once
#ifndef AI_PLYLOADER_H_INCLUDED
#define AI_PLYLOADER_H_INCLUDED

#include "PlyParser.h"
#include <assimp/BaseImporter.h>
#include <assimp/types.h>
#include <vector>

struct aiNode;
struct aiMaterial;
struct aiMesh;

namespace Assimp {

using namespace PLY;

// ---------------------------------------------------------------------------
/** Importer class to load the stanford PLY file format
*/
class PLYImporter : public BaseImporter {
public:
    PLYImporter();
    ~PLYImporter() override = default;

    // -------------------------------------------------------------------
    /** Returns whether the class can handle the format of the given file.
     * See BaseImporter::CanRead() for details.
     */
    bool CanRead(const std::string &pFile, IOSystem *pIOHandler,
            bool checkSig) const override;

    // -------------------------------------------------------------------
    /** Extract a vertex from the DOM
    */
    void LoadVertex(const PLY::Element *pcElement, const PLY::ElementInstance *instElement, unsigned int pos);

    // -------------------------------------------------------------------
    /** Extract a face from the DOM
    */
    void LoadFace(const PLY::Element *pcElement, const PLY::ElementInstance *instElement, unsigned int pos);

protected:
    // -------------------------------------------------------------------
    /** Return importer meta information.
     * See #BaseImporter::GetInfo for the details
     */
    const aiImporterDesc *GetInfo() const override;

    // -------------------------------------------------------------------
    /** Imports the given file into the given scene structure.
    * See BaseImporter::InternReadFile() for details
    */
    void InternReadFile(const std::string &pFile, aiScene *pScene,
            IOSystem *pIOHandler) override;

    // -------------------------------------------------------------------
    /** Extract a material list from the DOM
    */
    void LoadMaterial(std::vector<aiMaterial *> *pvOut, std::string &defaultTexture, const bool pointsOnly);

    // -------------------------------------------------------------------
    /** Static helper to parse a color from four single channels in
    */
    static void GetMaterialColor(
            const std::vector<PLY::PropertyInstance> &avList,
            unsigned int aiPositions[4],
            PLY::EDataType aiTypes[4],
            aiColor4D *clrOut);

    // -------------------------------------------------------------------
    /** Static helper to parse a color channel value. The input value
    *  is normalized to 0-1.
    */
    static ai_real NormalizeColorValue(
            PLY::PropertyInstance::ValueUnion val,
            PLY::EDataType eType);

    /** Buffer to hold the loaded file */
    unsigned char *mBuffer;

    /** Document object model representation extracted from the file */
    PLY::DOM *pcDOM;

    /** Mesh generated by loader */
    aiMesh *mGeneratedMesh;
};

} // end of namespace Assimp

#endif // AI_3DSIMPORTER_H_INC
