#include "fixtures/OpenGLTestFixture.h"
#include "XCEngine/RHI/OpenGL/OpenGLTexture.h"

using namespace XCEngine::RHI;

TEST_F(OpenGLTestFixture, Texture_Initialize_2DTexture) {
    OpenGLTexture texture;

    bool result = texture.Initialize2D(64, 64, 4, nullptr, false);

    ASSERT_TRUE(result);
    EXPECT_NE(texture.GetID(), 0u);
    EXPECT_EQ(texture.GetWidth(), 64);
    EXPECT_EQ(texture.GetHeight(), 64);
    EXPECT_EQ(texture.GetTextureType(), TextureType::Texture2D);

    texture.Shutdown();
}

TEST_F(OpenGLTestFixture, Texture_Initialize_CubeMap) {
    OpenGLTexture texture;

    bool result = texture.InitializeCubeMap(64, 1, OpenGLFormat::RGBA8, nullptr);

    ASSERT_TRUE(result);
    EXPECT_NE(texture.GetID(), 0u);
    EXPECT_EQ(texture.GetWidth(), 64);
    EXPECT_EQ(texture.GetHeight(), 64);
    EXPECT_EQ(texture.GetTextureType(), TextureType::TextureCube);

    texture.Shutdown();
}

TEST_F(OpenGLTestFixture, Texture_Bind_Unbind) {
    OpenGLTexture texture;
    texture.Initialize2D(64, 64, 4, nullptr, false);

    texture.Bind(0);
    GLint boundTexture = 0;
    glGetIntegerv(GL_TEXTURE_BINDING_2D, &boundTexture);
    EXPECT_EQ(boundTexture, static_cast<GLint>(texture.GetID()));

    texture.Unbind();
    glGetIntegerv(GL_TEXTURE_BINDING_2D, &boundTexture);
    EXPECT_EQ(boundTexture, 0);

    texture.Shutdown();
}

TEST_F(OpenGLTestFixture, Texture_GenerateMipmap) {
    OpenGLTexture texture;
    texture.Initialize2D(64, 64, 4, nullptr, false);

    texture.GenerateMipmap();

    GLenum error = glGetError();
    EXPECT_EQ(error, GL_NO_ERROR);

    texture.Shutdown();
}

TEST_F(OpenGLTestFixture, Texture_SetFiltering_SetWrapping) {
    OpenGLTexture texture;
    texture.Initialize2D(64, 64, 4, nullptr, false);

    texture.SetFiltering(GL_LINEAR_MIPMAP_LINEAR, GL_LINEAR);
    texture.SetWrapping(GL_REPEAT, GL_REPEAT, GL_REPEAT);

    GLenum error = glGetError();
    EXPECT_EQ(error, GL_NO_ERROR);

    texture.Shutdown();
}