/*
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Open Asset Import Library (assimp)
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Copyright (c) 2006-2020, assimp team

All rights reserved.

Redistribution and use of this software in source and binary forms,
with or without modification, are permitted provided that the following
conditions are met:

* Redistributions of source code must retain the above
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following disclaimer.

* Redistributions in binary form must reproduce the above
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* Neither the name of the assimp team, nor the names of its
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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/commonMetaData.h>
#include <assimp/postprocess.h>
#include <assimp/scene.h>
#include <assimp/Exporter.hpp>
#include <assimp/Importer.hpp>

using namespace Assimp;

class utColladaImportExport : public AbstractImportExportBase {
public:
    virtual bool importerTest() final {
        Assimp::Importer importer;
        const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/Collada/duck.dae", aiProcess_ValidateDataStructure);
        if (scene == nullptr)
            return false;

        // Expected number of items
        EXPECT_EQ(scene->mNumMeshes, 1u);
        EXPECT_EQ(scene->mNumMaterials, 1u);
        EXPECT_EQ(scene->mNumAnimations, 0u);
        EXPECT_EQ(scene->mNumTextures, 0u);
        EXPECT_EQ(scene->mNumLights, 1u);
        EXPECT_EQ(scene->mNumCameras, 1u);

        // Expected common metadata
        aiString value;
        EXPECT_TRUE(scene->mMetaData->Get(AI_METADATA_SOURCE_FORMAT, value)) << "No importer format metadata";
        EXPECT_STREQ("Collada Importer", value.C_Str());

        EXPECT_TRUE(scene->mMetaData->Get(AI_METADATA_SOURCE_FORMAT_VERSION, value)) << "No format version metadata";
        EXPECT_STREQ("1.4.1", value.C_Str());

        EXPECT_TRUE(scene->mMetaData->Get(AI_METADATA_SOURCE_GENERATOR, value)) << "No generator metadata";
        EXPECT_EQ(strncmp(value.C_Str(), "Maya 8.0", 8), 0) << "AI_METADATA_SOURCE_GENERATOR was: " << value.C_Str();

        EXPECT_TRUE(scene->mMetaData->Get(AI_METADATA_SOURCE_COPYRIGHT, value)) << "No copyright metadata";
        EXPECT_EQ(strncmp(value.C_Str(), "Copyright 2006", 14), 0) << "AI_METADATA_SOURCE_COPYRIGHT was: " << value.C_Str();

        return true;
    }

    void ImportAndCheckIds(const char *file, size_t meshCount) {
        // Import the Collada using the 'default' where mesh names are the ids
        Assimp::Importer importer;
        const aiScene *scene = importer.ReadFile(file, aiProcess_ValidateDataStructure);
        ASSERT_TRUE(scene != nullptr) << "Fatal: could not re-import " << file;
        EXPECT_EQ(meshCount, scene->mNumMeshes) << "in " << file;

        // Check the mesh ids are unique
        std::map<std::string, size_t> meshNameMap;
        for (size_t idx = 0; idx < scene->mNumMeshes; ++idx) {
            std::string meshName(scene->mMeshes[idx]->mName.C_Str());
            const auto result = meshNameMap.insert(std::make_pair(meshName, idx));
            EXPECT_TRUE(result.second) << "Duplicate name: " << meshName << " index " << result.first->second;
        }
    }
};

TEST_F(utColladaImportExport, importDaeFromFileTest) {
    EXPECT_TRUE(importerTest());
}

TEST_F(utColladaImportExport, exporterUniqueIdsTest) {
    Assimp::Importer importer;
    Assimp::Exporter exporter;
    const char *outFileEmpty = "exportMeshIdTest_empty_out.dae";
    const char *outFileNamed = "exportMeshIdTest_named_out.dae";

    // Load a sample file containing multiple meshes
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/Collada/teapots.DAE", aiProcess_ValidateDataStructure);

    ASSERT_TRUE(scene != nullptr) << "Fatal: could not import teapots.DAE!";
    ASSERT_EQ(3u, scene->mNumMeshes) << "Fatal: teapots.DAE initial load failed";

    // Clear the mesh names
    for (size_t idx = 0; idx < scene->mNumMeshes; ++idx) {
        scene->mMeshes[idx]->mName.Clear();
    }
    ASSERT_EQ(AI_SUCCESS, exporter.Export(scene, "collada", outFileEmpty)) << "Fatal: Could not export un-named meshes file";

    ImportAndCheckIds(outFileEmpty, 3);

    // Force the meshes to have the same non-empty name
    aiString testName("test_mesh");
    for (size_t idx = 0; idx < scene->mNumMeshes; ++idx) {
        scene->mMeshes[idx]->mName = testName;
    }
    ASSERT_EQ(AI_SUCCESS, exporter.Export(scene, "collada", outFileNamed)) << "Fatal: Could not export named meshes file";

    ImportAndCheckIds(outFileNamed, 3);
}

class utColladaZaeImportExport : public AbstractImportExportBase {
public:
    virtual bool importerTest() final {
        {
            Assimp::Importer importer;
            const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/Collada/duck.zae", aiProcess_ValidateDataStructure);
            if (scene == nullptr)
                return false;

            // Expected number of items
            EXPECT_EQ(scene->mNumMeshes, 1u);
            EXPECT_EQ(scene->mNumMaterials, 1u);
            EXPECT_EQ(scene->mNumAnimations, 0u);
            EXPECT_EQ(scene->mNumTextures, 1u);
            EXPECT_EQ(scene->mNumLights, 1u);
            EXPECT_EQ(scene->mNumCameras, 1u);
        }

        {
            Assimp::Importer importer;
            const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/Collada/duck_nomanifest.zae", aiProcess_ValidateDataStructure);
            if (scene == nullptr)
                return false;

            // Expected number of items
            EXPECT_EQ(scene->mNumMeshes, 1u);
            EXPECT_EQ(scene->mNumMaterials, 1u);
            EXPECT_EQ(scene->mNumAnimations, 0u);
            EXPECT_EQ(scene->mNumTextures, 1u);
            EXPECT_EQ(scene->mNumLights, 1u);
            EXPECT_EQ(scene->mNumCameras, 1u);
        }

        return true;
    }
};

TEST_F(utColladaZaeImportExport, importBlenFromFileTest) {
    EXPECT_TRUE(importerTest());
}