#include "Platform/Win32/EditorWindow.h"
#include "Platform/Win32/EditorWindowConstants.h"
#include "Platform/Win32/EditorWindowInputSupport.h"
#include "Platform/Win32/EditorWindowRuntimeSupport.h"
#include "Platform/Win32/EditorWindowStyle.h"

#include <XCEngine/UI/DrawData.h>

#include <algorithm>

namespace XCEngine::UI::Editor::App {

using namespace EditorWindowSupport;
using ::XCEngine::UI::UIDrawData;
using ::XCEngine::UI::UIDrawList;
using ::XCEngine::UI::UIInputEvent;
using ::XCEngine::UI::UIPoint;
using ::XCEngine::UI::UIRect;

void EditorWindow::RenderFrame(
    EditorContext& editorContext,
    bool globalTabDragActive) {
    if (!m_render.ready || m_window.hwnd == nullptr) {
        return;
    }

    UINT pixelWidth = 0u;
    UINT pixelHeight = 0u;
    if (!ResolveRenderClientPixelSize(pixelWidth, pixelHeight)) {
        return;
    }

    const float width = PixelsToDips(static_cast<float>(pixelWidth));
    const float height = PixelsToDips(static_cast<float>(pixelHeight));
    const UIRect workspaceBounds = ResolveWorkspaceBounds(width, height);

    UIDrawData drawData = {};
    UIDrawList& drawList = drawData.EmplaceDrawList("XCEditorShell");
    drawList.AddFilledRect(
        UIRect(0.0f, 0.0f, width, height),
        kShellSurfaceColor);

    if (editorContext.IsValid()) {
        RenderRuntimeFrame(editorContext, globalTabDragActive, workspaceBounds, drawList);
    } else {
        RenderInvalidFrame(editorContext, drawList);
    }

    AppendBorderlessWindowChrome(drawList, width);

    const Host::D3D12WindowRenderLoopPresentResult presentResult =
        m_render.windowRenderLoop.Present(drawData);
    if (!presentResult.warning.empty()) {
        LogRuntimeTrace("present", presentResult.warning);
    }

    m_render.autoScreenshot.CaptureIfRequested(
        m_render.renderer,
        drawData,
        pixelWidth,
        pixelHeight,
        presentResult.framePresented);
}

void EditorWindow::OnPaintMessage(
    EditorContext& editorContext,
    bool globalTabDragActive) {
    if (!m_render.ready || m_window.hwnd == nullptr) {
        return;
    }

    PAINTSTRUCT paintStruct = {};
    BeginPaint(m_window.hwnd, &paintStruct);
    RenderFrame(editorContext, globalTabDragActive);
    EndPaint(m_window.hwnd, &paintStruct);
}

UIRect EditorWindow::ResolveWorkspaceBounds(float clientWidthDips, float clientHeightDips) const {
    if (!IsBorderlessWindowEnabled()) {
        return UIRect(0.0f, 0.0f, clientWidthDips, clientHeightDips);
    }

    if (ShouldUseDetachedTitleBarTabStrip()) {
        return UIRect(0.0f, 0.0f, clientWidthDips, clientHeightDips);
    }

    const float titleBarHeight = (std::min)(kBorderlessTitleBarHeightDips, clientHeightDips);
    return UIRect(
        0.0f,
        titleBarHeight,
        clientWidthDips,
        (std::max)(0.0f, clientHeightDips - titleBarHeight));
}

} // namespace XCEngine::UI::Editor::App