#include "WindowMessageDispatchHandlers.h"

#include "Platform/Win32/EditorWindow.h"
#include "WindowMessageHost.h"

namespace XCEngine::UI::Editor::Host {

void RenderAndValidateWindow(const WindowMessageDispatchContext& context) {
    if (!context.window.IsRenderReady()) {
        return;
    }

    context.window.RenderFrame(
        context.windowHost.GetEditorContext(),
        context.windowHost.IsGlobalTabDragActive());
    if (context.hwnd != nullptr && IsWindow(context.hwnd)) {
        ValidateRect(context.hwnd, nullptr);
    }
}

bool TryDispatchWindowLifecycleMessage(
    const WindowMessageDispatchContext& context,
    UINT message,
    WPARAM wParam,
    LPARAM lParam,
    LRESULT& outResult) {
    switch (message) {
    case WM_DPICHANGED:
        if (lParam == 0) {
            return false;
        }
        context.window.OnDpiChanged(
            static_cast<UINT>(LOWORD(wParam)),
            *reinterpret_cast<const RECT*>(lParam));
        RenderAndValidateWindow(context);
        outResult = 0;
        return true;
    case WM_ENTERSIZEMOVE:
        context.window.OnEnterSizeMove();
        outResult = 0;
        return true;
    case WM_EXITSIZEMOVE:
        context.window.OnExitSizeMove();
        RenderAndValidateWindow(context);
        outResult = 0;
        return true;
    case WM_SIZE:
        if (wParam != SIZE_MINIMIZED) {
            context.window.OnResize(
                static_cast<UINT>(LOWORD(lParam)),
                static_cast<UINT>(HIWORD(lParam)));
            RenderAndValidateWindow(context);
        }
        outResult = 0;
        return true;
    case WM_PAINT:
        context.window.OnPaintMessage(
            context.windowHost.GetEditorContext(),
            context.windowHost.IsGlobalTabDragActive());
        outResult = 0;
        return true;
    case WM_ERASEBKGND:
        outResult = 1;
        return true;
    case WM_DESTROY:
        if (context.windowHost.OwnsActiveGlobalTabDrag(context.window.GetWindowId())) {
            context.windowHost.EndGlobalTabDragSession();
        }
        context.windowHost.HandleDestroyedWindow(context.hwnd);
        outResult = 0;
        return true;
    default:
        return false;
    }
}

} // namespace XCEngine::UI::Editor::Host