#pragma once

#include <windows.h>

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

class HostRuntimeState {
public:
    void Reset() {
        m_windowDpi = 96u;
        m_inInteractiveResize = false;
        m_renderFrameQueued = false;
        m_hasPendingWindowResize = false;
        m_pendingWindowResizeWidth = 0u;
        m_pendingWindowResizeHeight = 0u;
    }

    void SetWindowDpi(UINT dpi) {
        m_windowDpi = dpi == 0u ? 96u : dpi;
    }

    UINT GetWindowDpi() const {
        return m_windowDpi;
    }

    float GetDpiScale(float baseDpiScale) const {
        return baseDpiScale > 0.0f
            ? static_cast<float>(m_windowDpi) / baseDpiScale
            : 1.0f;
    }

    void BeginInteractiveResize() {
        m_inInteractiveResize = true;
    }

    void EndInteractiveResize() {
        m_inInteractiveResize = false;
    }

    bool IsInteractiveResize() const {
        return m_inInteractiveResize;
    }

    void QueueWindowResize(UINT width, UINT height) {
        if (width == 0u || height == 0u) {
            return;
        }

        m_pendingWindowResizeWidth = width;
        m_pendingWindowResizeHeight = height;
        m_hasPendingWindowResize = true;
    }

    bool ConsumePendingWindowResize(UINT& outWidth, UINT& outHeight) {
        outWidth = 0u;
        outHeight = 0u;
        if (!m_hasPendingWindowResize) {
            return false;
        }

        m_hasPendingWindowResize = false;
        outWidth = m_pendingWindowResizeWidth;
        outHeight = m_pendingWindowResizeHeight;
        return outWidth > 0u && outHeight > 0u;
    }

    bool TryQueueDeferredRender() {
        if (m_renderFrameQueued) {
            return false;
        }

        m_renderFrameQueued = true;
        return true;
    }

    void ClearDeferredRenderRequest() {
        m_renderFrameQueued = false;
    }

private:
    UINT m_windowDpi = 96u;
    bool m_inInteractiveResize = false;
    bool m_renderFrameQueued = false;
    bool m_hasPendingWindowResize = false;
    UINT m_pendingWindowResizeWidth = 0u;
    UINT m_pendingWindowResizeHeight = 0u;
};

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