/*
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Open Asset Import Library (assimp)
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Copyright (c) 2006-2019, assimp team



All rights reserved.

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*/
#include "UnitTestPCH.h"

#include <assimp/scene.h>
#include "PostProcessing/RemoveVCProcess.h"
#include "Material/MaterialSystem.h"

using namespace std;
using namespace Assimp;

class RemoveVCProcessTest : public ::testing::Test {
public:
    virtual void SetUp();
    virtual void TearDown();

protected:
    RemoveVCProcess* piProcess;
    aiScene* pScene;
};

// ------------------------------------------------------------------------------------------------
void RemoveVCProcessTest::SetUp()
{
    // construct the process
    piProcess = new RemoveVCProcess();
    pScene = new aiScene();

    // fill the scene ..
    pScene->mMeshes = new aiMesh*[pScene->mNumMeshes = 2];
    pScene->mMeshes[0] = new aiMesh();
    pScene->mMeshes[1] = new aiMesh();

    pScene->mMeshes[0]->mNumVertices = 120;
    pScene->mMeshes[0]->mVertices = new aiVector3D[120];
    pScene->mMeshes[0]->mNormals = new aiVector3D[120];
    pScene->mMeshes[0]->mTextureCoords[0] = new aiVector3D[120];
    pScene->mMeshes[0]->mTextureCoords[1] = new aiVector3D[120];
    pScene->mMeshes[0]->mTextureCoords[2] = new aiVector3D[120];
    pScene->mMeshes[0]->mTextureCoords[3] = new aiVector3D[120];

    pScene->mMeshes[1]->mNumVertices = 120;
    pScene->mMeshes[1]->mVertices = new aiVector3D[120];

    pScene->mAnimations    = new aiAnimation*[pScene->mNumAnimations = 2];
    pScene->mAnimations[0] = new aiAnimation();
    pScene->mAnimations[1] = new aiAnimation();

    pScene->mTextures = new aiTexture*[pScene->mNumTextures = 2];
    pScene->mTextures[0] = new aiTexture();
    pScene->mTextures[1] = new aiTexture();

    pScene->mMaterials    = new aiMaterial*[pScene->mNumMaterials = 2];
    pScene->mMaterials[0] = new aiMaterial();
    pScene->mMaterials[1] = new aiMaterial();

    pScene->mLights    = new aiLight*[pScene->mNumLights = 2];
    pScene->mLights[0] = new aiLight();
    pScene->mLights[1] = new aiLight();

    pScene->mCameras    = new aiCamera*[pScene->mNumCameras = 2];
    pScene->mCameras[0] = new aiCamera();
    pScene->mCameras[1] = new aiCamera();

    // COMPILE TEST: aiMaterial may no add any extra members,
    // so we don't need a virtual destructor
    char check[sizeof(aiMaterial) == sizeof(aiMaterial) ? 10 : -1];
    check[0] = 0;
    // to remove compiler warning
    EXPECT_EQ( 0, check[0] );
}

// ------------------------------------------------------------------------------------------------
void RemoveVCProcessTest::TearDown()
{
    delete pScene;
    delete piProcess;
}

// ------------------------------------------------------------------------------------------------
TEST_F(RemoveVCProcessTest, testMeshRemove)
{
    piProcess->SetDeleteFlags(aiComponent_MESHES);
    piProcess->Execute(pScene);

    EXPECT_TRUE(NULL == pScene->mMeshes);
    EXPECT_EQ(0U, pScene->mNumMeshes);
    EXPECT_TRUE(pScene->mFlags == AI_SCENE_FLAGS_INCOMPLETE);
}

// ------------------------------------------------------------------------------------------------
TEST_F(RemoveVCProcessTest, testAnimRemove)
{
    piProcess->SetDeleteFlags(aiComponent_ANIMATIONS);
    piProcess->Execute(pScene);

    EXPECT_TRUE(NULL == pScene->mAnimations);
    EXPECT_EQ(0U, pScene->mNumAnimations);
    EXPECT_EQ(0U, pScene->mFlags);
}

// ------------------------------------------------------------------------------------------------
TEST_F(RemoveVCProcessTest, testMaterialRemove)
{
    piProcess->SetDeleteFlags(aiComponent_MATERIALS);
    piProcess->Execute(pScene);

    // there should be one default material now ...
    EXPECT_TRUE(1 == pScene->mNumMaterials &&
        pScene->mMeshes[0]->mMaterialIndex == 0 &&
        pScene->mMeshes[1]->mMaterialIndex == 0);
    EXPECT_EQ(0U, pScene->mFlags);
}

// ------------------------------------------------------------------------------------------------
TEST_F(RemoveVCProcessTest, testTextureRemove)
{
    piProcess->SetDeleteFlags(aiComponent_TEXTURES);
    piProcess->Execute(pScene);

    EXPECT_TRUE(NULL == pScene->mTextures);
    EXPECT_EQ(0U, pScene->mNumTextures);
    EXPECT_EQ(0U, pScene->mFlags);
}

// ------------------------------------------------------------------------------------------------
TEST_F(RemoveVCProcessTest, testCameraRemove)
{
    piProcess->SetDeleteFlags(aiComponent_CAMERAS);
    piProcess->Execute(pScene);

    EXPECT_TRUE(NULL == pScene->mCameras);
    EXPECT_EQ(0U, pScene->mNumCameras);
    EXPECT_EQ(0U, pScene->mFlags);
}

// ------------------------------------------------------------------------------------------------
TEST_F(RemoveVCProcessTest, testLightRemove)
{
    piProcess->SetDeleteFlags(aiComponent_LIGHTS);
    piProcess->Execute(pScene);

    EXPECT_TRUE(NULL == pScene->mLights);
    EXPECT_EQ(0U, pScene->mNumLights);
    EXPECT_EQ(0U, pScene->mFlags);
}

// ------------------------------------------------------------------------------------------------
TEST_F(RemoveVCProcessTest, testMeshComponentsRemoveA)
{
    piProcess->SetDeleteFlags(aiComponent_TEXCOORDSn(1) | aiComponent_TEXCOORDSn(2) | aiComponent_TEXCOORDSn(3));
    piProcess->Execute(pScene);

    EXPECT_TRUE(pScene->mMeshes[0]->mTextureCoords[0] &&
        !pScene->mMeshes[0]->mTextureCoords[1] &&
        !pScene->mMeshes[0]->mTextureCoords[2] &&
        !pScene->mMeshes[0]->mTextureCoords[3]);
    EXPECT_EQ(0U, pScene->mFlags);
}

// ------------------------------------------------------------------------------------------------
TEST_F(RemoveVCProcessTest, testMeshComponentsRemoveB)
{
    piProcess->SetDeleteFlags(aiComponent_TEXCOORDSn(1) | aiComponent_NORMALS);
    piProcess->Execute(pScene);

    EXPECT_TRUE(pScene->mMeshes[0]->mTextureCoords[0] &&
        pScene->mMeshes[0]->mTextureCoords[1]  &&
        pScene->mMeshes[0]->mTextureCoords[2]  &&     // shift forward ...
        !pScene->mMeshes[0]->mTextureCoords[3] &&
        !pScene->mMeshes[0]->mNormals);
    EXPECT_EQ(0U, pScene->mFlags);
}

// ------------------------------------------------------------------------------------------------
TEST_F(RemoveVCProcessTest, testRemoveEverything)
{
    piProcess->SetDeleteFlags(aiComponent_LIGHTS | aiComponent_ANIMATIONS |
        aiComponent_MATERIALS | aiComponent_MESHES | aiComponent_CAMERAS | aiComponent_TEXTURES);
    piProcess->Execute(pScene);
    EXPECT_EQ(0U, pScene->mNumAnimations);
    EXPECT_EQ(0U, pScene->mNumCameras);
    EXPECT_EQ(0U, pScene->mNumLights);
    EXPECT_EQ(0U, pScene->mNumMeshes);
    EXPECT_EQ(0U, pScene->mNumTextures);
    // Only the default material should remain.
    EXPECT_EQ(1U, pScene->mNumMaterials);
}