/*
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Open Asset Import Library (assimp)
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*/
#include "UnitTestPCH.h"

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

using namespace ::Assimp;

class utPLYImportExport : public AbstractImportExportBase {
public:
    virtual bool importerTest() {
        Assimp::Importer importer;
        const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/PLY/cube.ply", aiProcess_ValidateDataStructure);
        EXPECT_EQ(1u, scene->mNumMeshes);
        EXPECT_NE(nullptr, scene->mMeshes[0]);
        if (nullptr == scene->mMeshes[0]) {
            return false;
        }
        EXPECT_EQ(8u, scene->mMeshes[0]->mNumVertices);
        EXPECT_EQ(6u, scene->mMeshes[0]->mNumFaces);

        return (nullptr != scene);
    }

#ifndef ASSIMP_BUILD_NO_EXPORT
    virtual bool exporterTest() {
        Importer importer;
        Exporter exporter;
        const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/PLY/cube.ply", aiProcess_ValidateDataStructure);
        EXPECT_NE(nullptr, scene);
        EXPECT_EQ(aiReturn_SUCCESS, exporter.Export(scene, "ply", ASSIMP_TEST_MODELS_DIR "/PLY/cube_out.ply"));

        return true;
    }
#endif // ASSIMP_BUILD_NO_EXPORT
};

TEST_F(utPLYImportExport, importTest_Success) {
    EXPECT_TRUE(importerTest());
}

#ifndef ASSIMP_BUILD_NO_EXPORT

TEST_F(utPLYImportExport, exportTest_Success) {
    EXPECT_TRUE(exporterTest());
}

#endif // ASSIMP_BUILD_NO_EXPORT

//Test issue 1623, crash when loading two PLY files in a row
TEST_F(utPLYImportExport, importerMultipleTest) {
    Assimp::Importer importer;
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/PLY/cube.ply", aiProcess_ValidateDataStructure);

    EXPECT_NE(nullptr, scene);

    scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/PLY/cube.ply", aiProcess_ValidateDataStructure);

    EXPECT_NE(nullptr, scene);
    EXPECT_NE(nullptr, scene->mMeshes[0]);
    EXPECT_EQ(6u, scene->mMeshes[0]->mNumFaces);
}

TEST_F(utPLYImportExport, importPLYwithUV) {
    Assimp::Importer importer;
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/PLY/cube_uv.ply", aiProcess_ValidateDataStructure);

    EXPECT_NE(nullptr, scene);
    EXPECT_NE(nullptr, scene->mMeshes[0]);
    //This test model is using n-gons, so 6 faces instead of 12 tris
    EXPECT_EQ(6u, scene->mMeshes[0]->mNumFaces);
    EXPECT_EQ(aiPrimitiveType_POLYGON, scene->mMeshes[0]->mPrimitiveTypes);
    EXPECT_EQ(true, scene->mMeshes[0]->HasTextureCoords(0));
}

TEST_F(utPLYImportExport, importBinaryPLY) {
    Assimp::Importer importer;
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/PLY/cube_binary.ply", aiProcess_ValidateDataStructure);

    EXPECT_NE(nullptr, scene);
    EXPECT_NE(nullptr, scene->mMeshes[0]);
    //This test model is double sided, so 12 faces instead of 6
    EXPECT_EQ(12u, scene->mMeshes[0]->mNumFaces);
}

TEST_F(utPLYImportExport, vertexColorTest) {
    Assimp::Importer importer;
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/PLY/float-color.ply", aiProcess_ValidateDataStructure);
    EXPECT_NE(nullptr, scene);
    EXPECT_EQ(1u, scene->mMeshes[0]->mNumFaces);
    EXPECT_EQ(aiPrimitiveType_TRIANGLE, scene->mMeshes[0]->mPrimitiveTypes);
    EXPECT_EQ(true, scene->mMeshes[0]->HasVertexColors(0));

    auto first_face = scene->mMeshes[0]->mFaces[0];
    EXPECT_EQ(3u, first_face.mNumIndices);
    EXPECT_EQ(0u, first_face.mIndices[0]);
    EXPECT_EQ(1u, first_face.mIndices[1]);
    EXPECT_EQ(2u, first_face.mIndices[2]);
}

// Test issue #623, PLY importer should not automatically create faces
TEST_F(utPLYImportExport, pointcloudTest) {
    Assimp::Importer importer;

    //Could not use aiProcess_ValidateDataStructure since it's missing faces.
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/PLY/issue623.ply", 0);
    EXPECT_NE(nullptr, scene);

    EXPECT_EQ(1u, scene->mNumMeshes);
    EXPECT_NE(nullptr, scene->mMeshes[0]);
    EXPECT_EQ(24u, scene->mMeshes[0]->mNumVertices);
    EXPECT_EQ(aiPrimitiveType::aiPrimitiveType_POINT, scene->mMeshes[0]->mPrimitiveTypes);
    EXPECT_EQ(0u, scene->mMeshes[0]->mNumFaces);
}

static const char *test_file =
        "ply\n"
        "format ascii 1.0\n"
        "element vertex 4\n"
        "property float x\n"
        "property float y\n"
        "property float z\n"
        "property uchar red\n"
        "property uchar green\n"
        "property uchar blue\n"
        "property float nx\n"
        "property float ny\n"
        "property float nz\n"
        "end_header\n"
        "0.0 0.0 0.0 255 255 255 0.0 1.0 0.0\n"
        "0.0 0.0 1.0 255 0 255 0.0 0.0 1.0\n"
        "0.0 1.0 0.0 255 255 0 1.0 0.0 0.0\n"
        "0.0 1.0 1.0 0 255 255 1.0 1.0 0.0\n";

TEST_F(utPLYImportExport, parseErrorTest) {
    Assimp::Importer importer;
    //Could not use aiProcess_ValidateDataStructure since it's missing faces.
    const aiScene *scene = importer.ReadFileFromMemory(test_file, strlen(test_file), 0);
    EXPECT_NE(nullptr, scene);
}
