/*
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Open Asset Import Library (assimp)
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Copyright (c) 2006-2021, assimp team

All rights reserved.

Redistribution and use of this software in source and binary forms,
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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
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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*/

#include "AbstractImportExportBase.h"
#include "UnitTestPCH.h"

#include <assimp/postprocess.h>
#include <assimp/scene.h>
#include <assimp/Exporter.hpp>
#include <assimp/Importer.hpp>

#include <vector>

using namespace Assimp;

class utSTLImporterExporter : public AbstractImportExportBase {
public:
    virtual bool importerTest() {
        Assimp::Importer importer;
        const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/STL/Spider_ascii.stl", aiProcess_ValidateDataStructure);
        return nullptr != scene;
    }
};

TEST_F(utSTLImporterExporter, importSTLFromFileTest) {
    EXPECT_TRUE(importerTest());
}

TEST_F(utSTLImporterExporter, test_multiple) {
    // import same file twice, each with its own importer
    // must work both times and not crash
    Assimp::Importer importer1;
    const aiScene *scene1 = importer1.ReadFile(ASSIMP_TEST_MODELS_DIR "/STL/Spider_ascii.stl", aiProcess_ValidateDataStructure);
    EXPECT_NE(nullptr, scene1);

    Assimp::Importer importer2;
    const aiScene *scene2 = importer2.ReadFile(ASSIMP_TEST_MODELS_DIR "/STL/Spider_ascii.stl", aiProcess_ValidateDataStructure);
    EXPECT_NE(nullptr, scene2);
}

TEST_F(utSTLImporterExporter, importSTLformatdetection) {
    ::Assimp::Importer importer;
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/STL/formatDetection", aiProcess_ValidateDataStructure);

    EXPECT_NE(nullptr, scene);
}

TEST_F(utSTLImporterExporter, test_with_two_solids) {
    Assimp::Importer importer;
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/STL/triangle_with_two_solids.stl", aiProcess_ValidateDataStructure);
    EXPECT_NE(nullptr, scene);
}

TEST_F(utSTLImporterExporter, test_with_empty_solid) {
    Assimp::Importer importer;
    //STL File with empty mesh. We should still be able to import other meshes in this file. ValidateDataStructure should fail.
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/STL/triangle_with_empty_solid.stl", 0);
    EXPECT_NE(nullptr, scene);

    const aiScene *scene2 = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/STL/triangle_with_empty_solid.stl", aiProcess_ValidateDataStructure);
    EXPECT_EQ(nullptr, scene2);
}

#ifndef ASSIMP_BUILD_NO_EXPORT

TEST_F(utSTLImporterExporter, exporterTest) {
    Assimp::Importer importer;
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/STL/Spider_ascii.stl", aiProcess_ValidateDataStructure);

    Assimp::Exporter mAiExporter;
    mAiExporter.Export(scene, "stl", "spiderExport.stl");

    const aiScene *scene2 = importer.ReadFile("spiderExport.stl", aiProcess_ValidateDataStructure);
    EXPECT_NE(nullptr, scene2);
}

TEST_F(utSTLImporterExporter, test_export_pointclouds) {
    struct XYZ {
        float x, y, z;
    };

    std::vector<XYZ> points;

    for (size_t i = 0; i < 10; ++i) {
        XYZ current;
        current.x = static_cast<float>(i);
        current.y = static_cast<float>(i);
        current.z = static_cast<float>(i);
        points.push_back(current);
    }
    aiScene scene;
    scene.mRootNode = new aiNode();

    scene.mMeshes = new aiMesh *[1];
    scene.mMeshes[0] = nullptr;
    scene.mNumMeshes = 1;

    scene.mMaterials = new aiMaterial *[1];
    scene.mMaterials[0] = nullptr;
    scene.mNumMaterials = 1;

    scene.mMaterials[0] = new aiMaterial();

    scene.mMeshes[0] = new aiMesh();
    scene.mMeshes[0]->mMaterialIndex = 0;

    scene.mRootNode->mMeshes = new unsigned int[1];
    scene.mRootNode->mMeshes[0] = 0;
    scene.mRootNode->mNumMeshes = 1;

    auto pMesh = scene.mMeshes[0];

    size_t numValidPoints = points.size();

    pMesh->mVertices = new aiVector3D[numValidPoints];
    pMesh->mNumVertices = static_cast<unsigned int>(numValidPoints);

    int i = 0;
    for (XYZ &p : points) {
        pMesh->mVertices[i] = aiVector3D(p.x, p.y, p.z);
        ++i;
    }

    Assimp::Exporter mAiExporter;
    ExportProperties *properties = new ExportProperties;
    properties->SetPropertyBool(AI_CONFIG_EXPORT_POINT_CLOUDS, true);
    mAiExporter.Export(&scene, "stl", "testExport.stl", 0, properties);

    delete properties;
}

#endif
