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

using namespace XCEngine::RHI;

TEST_F(OpenGLTestFixture, PipelineState_SetDepthStencilState) {
    OpenGLPipelineState pipeline;
    
    OpenGLDepthStencilState state;
    state.depthTestEnable = true;
    state.depthWriteEnable = true;
    state.depthFunc = ComparisonFunc::Less;
    
    pipeline.SetDepthStencilState(state);
    pipeline.ApplyDepthStencil();
    
    GLint depthTest = 0;
    glGetIntegerv(GL_DEPTH_TEST, &depthTest);
    EXPECT_EQ(depthTest, 1);
    
    GLint depthMask = 0;
    glGetIntegerv(GL_DEPTH_WRITEMASK, &depthMask);
    EXPECT_EQ(depthMask, 1);
}

TEST_F(OpenGLTestFixture, PipelineState_SetBlendState) {
    OpenGLPipelineState pipeline;
    
    OpenGLBlendState state;
    state.blendEnable = true;
    state.srcBlend = BlendFactor::SrcAlpha;
    state.dstBlend = BlendFactor::InvSrcAlpha;
    
    pipeline.SetBlendState(state);
    pipeline.ApplyBlend();
    
    GLint blend = 0;
    glGetIntegerv(GL_BLEND, &blend);
    EXPECT_EQ(blend, 1);
}

TEST_F(OpenGLTestFixture, PipelineState_SetViewport_SetScissor) {
    OpenGLPipelineState pipeline;
    
    ViewportState viewport;
    viewport.x = 0;
    viewport.y = 0;
    viewport.width = 800;
    viewport.height = 600;
    
    ScissorState scissor;
    scissor.enable = true;
    scissor.x = 0;
    scissor.y = 0;
    scissor.width = 800;
    scissor.height = 600;
    
    pipeline.SetViewport(viewport);
    pipeline.SetScissor(scissor);
    pipeline.ApplyViewport();
    
    GLint viewportArr[4] = {};
    glGetIntegerv(GL_VIEWPORT, viewportArr);
    EXPECT_EQ(viewportArr[0], 0);
    EXPECT_EQ(viewportArr[1], 0);
    EXPECT_EQ(viewportArr[2], 800);
    EXPECT_EQ(viewportArr[3], 600);
}