/*
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Open Asset Import Library (assimp)
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All rights reserved.

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* Redistributions in binary form must reproduce the above
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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 "UnitTestPCH.h"

#include "PostProcessing/FindInvalidDataProcess.h"
#include <assimp/mesh.h>

using namespace std;
using namespace Assimp;

class utFindInvalidDataProcess : public ::testing::Test {
public:
    utFindInvalidDataProcess() :
            Test(), mMesh(nullptr), mProcess(nullptr) {
        // empty
    }

protected:
    virtual void SetUp();
    virtual void TearDown();

protected:
    aiMesh *mMesh;
    FindInvalidDataProcess *mProcess;
};

// ------------------------------------------------------------------------------------------------
void utFindInvalidDataProcess::SetUp() {
    ASSERT_TRUE(AI_MAX_NUMBER_OF_TEXTURECOORDS >= 3);

    mProcess = new FindInvalidDataProcess();
    mMesh = new aiMesh();

    mMesh->mNumVertices = 1000;
    mMesh->mVertices = new aiVector3D[1000];
    for (unsigned int i = 0; i < 1000; ++i) {
        mMesh->mVertices[i] = aiVector3D((float)i);
    }

    mMesh->mNormals = new aiVector3D[1000];
    for (unsigned int i = 0; i < 1000; ++i) {
        mMesh->mNormals[i] = aiVector3D((float)i + 1);
    }

    mMesh->mTangents = new aiVector3D[1000];
    for (unsigned int i = 0; i < 1000; ++i) {
        mMesh->mTangents[i] = aiVector3D((float)i);
    }

    mMesh->mBitangents = new aiVector3D[1000];
    for (unsigned int i = 0; i < 1000; ++i) {
        mMesh->mBitangents[i] = aiVector3D((float)i);
    }

    for (unsigned int a = 0; a < AI_MAX_NUMBER_OF_TEXTURECOORDS; ++a) {
        mMesh->mTextureCoords[a] = new aiVector3D[1000];
        for (unsigned int i = 0; i < 1000; ++i) {
            mMesh->mTextureCoords[a][i] = aiVector3D((float)i);
        }
    }
}

// ------------------------------------------------------------------------------------------------
void utFindInvalidDataProcess::TearDown() {
    delete mProcess;
    delete mMesh;
}

// ------------------------------------------------------------------------------------------------
TEST_F(utFindInvalidDataProcess, testStepNegativeResult) {
    for ( size_t i=0; i<mMesh->mNumVertices; ++i ) {
        mMesh->mNormals[i].x = mMesh->mNormals[i].y = mMesh->mNormals[i].z =0;
        mMesh->mBitangents[i].x = mMesh->mBitangents[i].y = mMesh->mBitangents[i].z = 0;
    }

    mMesh->mTextureCoords[2][455] = aiVector3D(std::numeric_limits<float>::quiet_NaN());

    mProcess->ProcessMesh(mMesh);

    EXPECT_TRUE(NULL != mMesh->mVertices);
    EXPECT_EQ(NULL, mMesh->mNormals);
    EXPECT_EQ(NULL, mMesh->mTangents);
    EXPECT_EQ(NULL, mMesh->mBitangents);

    for (unsigned int i = 0; i < 2; ++i) {
        EXPECT_TRUE(NULL != mMesh->mTextureCoords[i]);
    }

    for (unsigned int i = 2; i < AI_MAX_NUMBER_OF_TEXTURECOORDS; ++i) {
        EXPECT_EQ(NULL, mMesh->mTextureCoords[i]);
    }
}

// ------------------------------------------------------------------------------------------------
TEST_F(utFindInvalidDataProcess, testStepPositiveResult) {
    mProcess->ProcessMesh(mMesh);

    EXPECT_NE(nullptr, mMesh->mVertices);

    EXPECT_NE(nullptr, mMesh->mNormals);
    EXPECT_NE(nullptr, mMesh->mTangents);
    EXPECT_NE(nullptr, mMesh->mBitangents);

    for (unsigned int i = 0; i < AI_MAX_NUMBER_OF_TEXTURECOORDS; ++i) {
        EXPECT_NE(nullptr, mMesh->mTextureCoords[i]);
    }
}
