XCEngine/new_editor/src/Application.h

#pragma once

#include "panels/XCUIDemoPanel.h"
#include "panels/XCUILayoutLabPanel.h"

#include "Platform/D3D12WindowRenderer.h"
#include "Rendering/MainWindowNativeBackdropRenderer.h"
#include "XCUIBackend/IWindowUICompositor.h"
#include "XCUIBackend/XCUIHostedPreviewPresenter.h"
#include "XCUIBackend/XCUIInputBridge.h"
#include "XCUIBackend/XCUILayoutLabRuntime.h"
#include "XCUIBackend/XCUIRHIRenderBackend.h"
#include "XCUIBackend/XCUIStandaloneTextAtlasProvider.h"

#include <chrono>
#include <cstdint>
#include <memory>
#include <string>
#include <vector>
#include <windows.h>

namespace XCEngine {
namespace NewEditor {

class Application {
public:
    int Run(HINSTANCE instance, int nCmdShow);

private:
    struct HostedPreviewPanelDiagnostics {
        std::string debugName = {};
        std::string debugSource = {};
        bool visible = false;
        bool hostedPreviewEnabled = false;
        bool nativeRequested = false;
        bool nativePresenterBound = false;
        bool descriptorAvailable = false;
        bool surfaceImageAvailable = false;
        bool surfaceAllocated = false;
        bool surfaceReady = false;
        bool presentedThisFrame = false;
        bool queuedToNativePassThisFrame = false;
        std::uint32_t surfaceWidth = 0;
        std::uint32_t surfaceHeight = 0;
        float logicalWidth = 0.0f;
        float logicalHeight = 0.0f;
        std::size_t queuedFrameIndex = 0;
        std::size_t submittedDrawListCount = 0;
        std::size_t submittedCommandCount = 0;
        std::size_t flushedDrawListCount = 0;
        std::size_t flushedCommandCount = 0;
    };

    struct HostedPreviewOffscreenSurface {
        std::string debugName = {};
        std::uint32_t width = 0;
        std::uint32_t height = 0;
        ::XCEngine::RHI::RHITexture* colorTexture = nullptr;
        ::XCEngine::RHI::RHIResourceView* colorView = nullptr;
        ::XCEngine::Editor::XCUIBackend::UITextureRegistration textureRegistration = {};
        ::XCEngine::RHI::ResourceStates colorState = ::XCEngine::RHI::ResourceStates::Common;

        bool IsReady() const {
            return !debugName.empty() &&
                colorTexture != nullptr &&
                colorView != nullptr &&
                textureRegistration.IsValid() &&
                width > 0u &&
                height > 0u;
        }
    };

    static LRESULT CALLBACK StaticWndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam);
    LRESULT WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam);

    bool CreateMainWindow(HINSTANCE instance, int nCmdShow);
    bool InitializeRenderer();
    void InitializeWindowCompositor();
    void ShutdownWindowCompositor();
    void ShutdownRenderer();
    void DestroyHostedPreviewSurfaces();
    void SyncHostedPreviewSurfaces();
    std::unique_ptr<::XCEngine::Editor::XCUIBackend::IXCUIHostedPreviewPresenter> CreateHostedPreviewPresenter(
        bool nativePreview);
    void ConfigureHostedPreviewPresenters();
    HostedPreviewPanelDiagnostics BuildHostedPreviewPanelDiagnostics(
        const char* debugName,
        const char* fallbackDebugSource,
        bool visible,
        bool hostedPreviewEnabled,
        bool nativeRequested,
        bool nativePresenterBound,
        const ::XCEngine::Editor::XCUIBackend::XCUIHostedPreviewStats& previewStats) const;
    HostedPreviewOffscreenSurface* FindHostedPreviewSurface(const std::string& debugName);
    const HostedPreviewOffscreenSurface* FindHostedPreviewSurface(const std::string& debugName) const;
    HostedPreviewOffscreenSurface& FindOrAddHostedPreviewSurface(const std::string& debugName);
    bool EnsureHostedPreviewSurface(
        HostedPreviewOffscreenSurface& previewSurface,
        std::uint32_t width,
        std::uint32_t height);
    bool RenderHostedPreviewOffscreenSurface(
        HostedPreviewOffscreenSurface& previewSurface,
        const ::XCEngine::Rendering::RenderContext& renderContext,
        const ::XCEngine::UI::UIDrawData& drawData);
    void RenderShellChrome();
    void RenderHostedPreviewHud();
    void RenderQueuedHostedPreviews(
        const ::XCEngine::Rendering::RenderContext& renderContext,
        const ::XCEngine::Rendering::RenderSurface& surface);
    void Frame();

    HWND m_hwnd = nullptr;
    ::XCEngine::Editor::Platform::D3D12WindowRenderer m_windowRenderer;
    std::unique_ptr<::XCEngine::Editor::XCUIBackend::IWindowUICompositor> m_windowCompositor;
    std::unique_ptr<XCUIDemoPanel> m_demoPanel;
    std::unique_ptr<XCUILayoutLabPanel> m_layoutLabPanel;
    ::XCEngine::Editor::XCUIBackend::XCUIWin32InputSource m_xcuiInputSource;
    ::XCEngine::Editor::XCUIBackend::XCUIHostedPreviewQueue m_hostedPreviewQueue;
    ::XCEngine::Editor::XCUIBackend::XCUIHostedPreviewSurfaceRegistry m_hostedPreviewSurfaceRegistry;
    ::XCEngine::Editor::XCUIBackend::XCUIStandaloneTextAtlasProvider m_hostedPreviewTextAtlasProvider;
    ::XCEngine::Editor::XCUIBackend::XCUIRHIRenderBackend m_hostedPreviewRenderBackend;
    std::vector<HostedPreviewOffscreenSurface> m_hostedPreviewSurfaces = {};
    ::XCEngine::Editor::XCUIBackend::XCUILayoutLabRuntime m_nativeOverlayRuntime;
    MainWindowNativeBackdropRenderer m_nativeBackdropRenderer;
    bool m_showImGuiDemoWindow = false;
    bool m_showNativeBackdrop = true;
    bool m_pulseNativeBackdropAccent = true;
    bool m_showNativeXCUIOverlay = true;
    bool m_showHostedPreviewHud = true;
    bool m_showNativeDemoPanelPreview = true;
    bool m_showNativeLayoutLabPreview = false;
    bool m_running = false;
    bool m_renderReady = false;
    std::chrono::steady_clock::time_point m_startTime = {};
};

} // namespace NewEditor
} // namespace XCEngine