#include <gtest/gtest.h>

#include "Utils/ProjectFileUtils.h"

#include <chrono>
#include <filesystem>

namespace XCEngine::Editor::ProjectFileUtils {
namespace {

class ProjectFileUtilsTest : public ::testing::Test {
protected:
    void SetUp() override {
        const auto stamp = std::chrono::steady_clock::now()
                               .time_since_epoch()
                               .count();
        m_projectRoot =
            std::filesystem::temp_directory_path() /
            ("xc_project_file_utils_" + std::to_string(stamp));
        std::filesystem::create_directories(m_projectRoot);
    }

    void TearDown() override {
        std::error_code ec;
        std::filesystem::remove_all(m_projectRoot, ec);
    }

    std::filesystem::path m_projectRoot;
};

TEST_F(ProjectFileUtilsTest, SavesAndLoadsGraphicsSettingsRoundTrip) {
    GraphicsSettingsDescriptor savedDescriptor;
    savedDescriptor.renderPipelineAssetAssembly = "GameScripts";
    savedDescriptor.renderPipelineAssetNamespace = "Gameplay";
    savedDescriptor.renderPipelineAssetClass =
        "ManagedForwardRenderPipelineProbeAsset";

    ASSERT_TRUE(SaveProjectGraphicsSettings(
        m_projectRoot.string(),
        savedDescriptor));
    EXPECT_TRUE(std::filesystem::exists(
        GetGraphicsSettingsFilePath(m_projectRoot.string())));

    const auto loadedDescriptor =
        LoadProjectGraphicsSettings(m_projectRoot.string());
    ASSERT_TRUE(loadedDescriptor.has_value());
    EXPECT_EQ(
        loadedDescriptor->renderPipelineAssetAssembly,
        savedDescriptor.renderPipelineAssetAssembly);
    EXPECT_EQ(
        loadedDescriptor->renderPipelineAssetNamespace,
        savedDescriptor.renderPipelineAssetNamespace);
    EXPECT_EQ(
        loadedDescriptor->renderPipelineAssetClass,
        savedDescriptor.renderPipelineAssetClass);
    EXPECT_TRUE(loadedDescriptor->HasRenderPipelineAsset());
}

TEST_F(ProjectFileUtilsTest, MissingGraphicsSettingsFileReturnsNullopt) {
    EXPECT_FALSE(
        LoadProjectGraphicsSettings(m_projectRoot.string()).has_value());
}

} // namespace
} // namespace XCEngine::Editor::ProjectFileUtils