#include "Platform/Win32/EditorFloatingWindowPlacement.h"

#include <algorithm>

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

namespace {

constexpr LONG kFloatingWindowTopOffset = 24;

}

RECT BuildEditorFloatingWindowRect(
    const POINT& screenPoint,
    LONG preferredWidth,
    LONG preferredHeight,
    LONG fallbackWidth,
    LONG fallbackHeight) {
    const LONG resolvedWidth = preferredWidth > 0 ? preferredWidth : fallbackWidth;
    const LONG resolvedHeight = preferredHeight > 0 ? preferredHeight : fallbackHeight;
    const LONG left = screenPoint.x - resolvedWidth / 2;
    const LONG top = screenPoint.y - kFloatingWindowTopOffset;
    RECT rect = {
        left,
        top,
        left + resolvedWidth,
        top + resolvedHeight
    };

    const HMONITOR monitor = MonitorFromPoint(screenPoint, MONITOR_DEFAULTTONEAREST);
    MONITORINFO monitorInfo = {};
    monitorInfo.cbSize = sizeof(monitorInfo);
    if (monitor != nullptr && GetMonitorInfoW(monitor, &monitorInfo)) {
        const RECT& workArea = monitorInfo.rcWork;
        const LONG width = rect.right - rect.left;
        const LONG height = rect.bottom - rect.top;
        rect.left = (std::max)(workArea.left, (std::min)(rect.left, workArea.right - width));
        rect.top = (std::max)(workArea.top, (std::min)(rect.top, workArea.bottom - height));
        rect.right = rect.left + width;
        rect.bottom = rect.top + height;
    }

    return rect;
}

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