//
// Copyright (c) 2014 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//

// CoreWindowNativeWindow.h: NativeWindow for managing ICoreWindow native window types.

#ifndef LIBANGLE_RENDERER_D3D_D3D11_WINRT_COREWINDOWNATIVEWINDOW_H_
#define LIBANGLE_RENDERER_D3D_D3D11_WINRT_COREWINDOWNATIVEWINDOW_H_

#include "libANGLE/renderer/d3d/d3d11/winrt/InspectableNativeWindow.h"

#include <memory>

typedef ABI::Windows::Foundation::__FITypedEventHandler_2_Windows__CUI__CCore__CCoreWindow_Windows__CUI__CCore__CWindowSizeChangedEventArgs_t IWindowSizeChangedEventHandler;

namespace rx
{
long ConvertDipsToPixels(float dips);

class CoreWindowNativeWindow : public InspectableNativeWindow, public std::enable_shared_from_this<CoreWindowNativeWindow>
{
  public:
    ~CoreWindowNativeWindow();

    bool initialize(EGLNativeWindowType window, IPropertySet *propertySet) override;
    HRESULT createSwapChain(ID3D11Device *device,
                            DXGIFactory *factory,
                            DXGI_FORMAT format,
                            unsigned int width,
                            unsigned int height,
                            bool containsAlpha,
                            DXGISwapChain **swapChain) override;

  protected:
    HRESULT scaleSwapChain(const SIZE &windowSize, const RECT &clientRect) override;

    bool registerForSizeChangeEvents();
    void unregisterForSizeChangeEvents();

  private:
    ComPtr<ABI::Windows::UI::Core::ICoreWindow> mCoreWindow;
    ComPtr<IMap<HSTRING, IInspectable*>> mPropertyMap;
};

[uuid(7F924F66-EBAE-40E5-A10B-B8F35E245190)]
class CoreWindowSizeChangedHandler :
    public Microsoft::WRL::RuntimeClass<Microsoft::WRL::RuntimeClassFlags<Microsoft::WRL::ClassicCom>, IWindowSizeChangedEventHandler>
{
  public:
    CoreWindowSizeChangedHandler() { }
    HRESULT RuntimeClassInitialize(std::shared_ptr<InspectableNativeWindow> host)
    {
        if (!host)
        {
            return E_INVALIDARG;
        }

        mHost = host;
        return S_OK;
    }

    // IWindowSizeChangedEventHandler
    IFACEMETHOD(Invoke)(ABI::Windows::UI::Core::ICoreWindow *sender, ABI::Windows::UI::Core::IWindowSizeChangedEventArgs *sizeChangedEventArgs)
    {
        std::shared_ptr<InspectableNativeWindow> host = mHost.lock();
        if (host)
        {
            ABI::Windows::Foundation::Size windowSize;
            if (SUCCEEDED(sizeChangedEventArgs->get_Size(&windowSize)))
            {
                SIZE windowSizeInPixels = { ConvertDipsToPixels(windowSize.Width), ConvertDipsToPixels(windowSize.Height) };
                host->setNewClientSize(windowSizeInPixels);
            }
        }

        return S_OK;
    }

  private:
    std::weak_ptr<InspectableNativeWindow> mHost;
};

HRESULT GetCoreWindowSizeInPixels(const ComPtr<ABI::Windows::UI::Core::ICoreWindow>& coreWindow, SIZE *windowSize);
}

#endif // LIBANGLE_RENDERER_D3D_D3D11_WINRT_COREWINDOWNATIVEWINDOW_H_