#include <render_3D/scene/Basic_Scene3D.h>

#include <gtest/gtest.h>

#include <chrono>
#include <future>

namespace renderive::render_3D {
using namespace std::chrono_literals;

TEST(Render3DFrameControl, LowLatencyBackpressuresInsteadOfReplacingPublishedFrame) {
    Scene3D scene({.width = 64, .height = 64});
    ASSERT_TRUE(scene.prepare_frame());
    auto second_prepare = std::async(std::launch::async, [&] { return scene.prepare_frame(); });
    EXPECT_EQ(second_prepare.wait_for(100ms), std::future_status::timeout);

    EXPECT_TRUE(scene.render_frame());
    ASSERT_EQ(second_prepare.wait_for(5s), std::future_status::ready);
    EXPECT_TRUE(second_prepare.get());
    EXPECT_TRUE(scene.render_frame());
}

TEST(Render3DFrameControl, ManualRefreshReleasesTheWaitingPainter) {
    Manual_Scene3D scene({.width = 64, .height = 64});
    ASSERT_TRUE(scene.prepare_frame());
    auto second_prepare = std::async(std::launch::async, [&] { return scene.prepare_frame(); });
    EXPECT_EQ(second_prepare.wait_for(100ms), std::future_status::timeout);

    ASSERT_TRUE(scene.refresh());
    ASSERT_EQ(second_prepare.wait_for(5s), std::future_status::ready);
    EXPECT_TRUE(second_prepare.get());
    EXPECT_TRUE(scene.render_frame());
    ASSERT_TRUE(scene.refresh());
    EXPECT_TRUE(scene.render_frame());
}

TEST(Render3DFrameControl, PlaybackPreservesQueuedFrames) {
    Playback_Scene3D scene({.width = 64, .height = 64});
    ASSERT_TRUE(scene.prepare_frame());
    ASSERT_TRUE(scene.prepare_frame());
    EXPECT_TRUE(scene.render_frame());
    EXPECT_TRUE(scene.render_frame());
    EXPECT_FALSE(scene.render_frame());
}

} // namespace renderive::render_3D