// unit-test-fcpw-compile.cpp

#include "../../source/core/slang-io.h"
#include "../../source/core/slang-process.h"
#include "slang-com-ptr.h"
#include "slang.h"
#include "unit-test/slang-unit-test.h"

#include <stdio.h>
#include <stdlib.h>

using namespace Slang;

// A test that uses the COM API to load and compile the FCPW library written by
// Rohan Sawhney, shader code in MIT license.
// https://github.com/rohan-sawhney/fcpw
//
SLANG_UNIT_TEST(fcpwCompile)
{
    ComPtr<slang::IGlobalSession> globalSession;
    SLANG_CHECK(slang_createGlobalSession(SLANG_API_VERSION, globalSession.writeRef()) == SLANG_OK);
    slang::TargetDesc targetDesc = {};
    targetDesc.format = SLANG_SPIRV;
    targetDesc.profile = globalSession->findProfile("spirv_1_5");
    slang::SessionDesc sessionDesc = {};
    sessionDesc.targetCount = 1;
    sessionDesc.targets = &targetDesc;
    sessionDesc.preprocessorMacroCount = 1;
    slang::PreprocessorMacroDesc macroDesc = {};
    macroDesc.name = "_BVH_TYPE";
    macroDesc.value = "2";
    sessionDesc.preprocessorMacros = &macroDesc;
    ComPtr<slang::ISession> session;
    SLANG_CHECK(globalSession->createSession(sessionDesc, session.writeRef()) == SLANG_OK);

    ComPtr<slang::IBlob> diagnosticBlob;
    auto module =
        session->loadModule("tests/fcpw/bvh-traversal.cs.slang", diagnosticBlob.writeRef());
    SLANG_CHECK(module != nullptr);

    ComPtr<slang::IEntryPoint> entryPoint;
    module->findEntryPointByName("rayIntersection", entryPoint.writeRef());
    SLANG_CHECK(entryPoint != nullptr);

    ComPtr<slang::IComponentType> compositeProgram;
    slang::IComponentType* components[] = {module, entryPoint.get()};
    session->createCompositeComponentType(
        components,
        2,
        compositeProgram.writeRef(),
        diagnosticBlob.writeRef());
    SLANG_CHECK(compositeProgram != nullptr);

    ComPtr<slang::IComponentType> linkedProgram;
    compositeProgram->link(linkedProgram.writeRef(), diagnosticBlob.writeRef());
    SLANG_CHECK(linkedProgram != nullptr);

    ComPtr<slang::IBlob> code;
    linkedProgram->getEntryPointCode(0, 0, code.writeRef(), diagnosticBlob.writeRef());
    SLANG_CHECK(code != nullptr);
    SLANG_CHECK(code->getBufferSize() != 0);
}