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//=============================================================================
// Copyright (c) 2026 FLIR Integrated Imaging Solutions, Inc. All Rights Reserved.
//
// This software is the confidential and proprietary information of FLIR
// Integrated Imaging Solutions, Inc. ("Confidential Information"). You
// shall not disclose such Confidential Information and shall use it only in
// accordance with the terms of the license agreement you entered into
// with FLIR Integrated Imaging Solutions, Inc. (FLIR).
//
// FLIR MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF THE
// SOFTWARE, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
// PURPOSE, OR NON-INFRINGEMENT. FLIR SHALL NOT BE LIABLE FOR ANY DAMAGES
// SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING
// THIS SOFTWARE OR ITS DERIVATIVES.
//=============================================================================

#ifndef FLIR_SPINNAKER_MANAGED_SYSTEM_EVENT_H
#define FLIR_SPINNAKER_MANAGED_SYSTEM_EVENT_H

#include "ManagedEventHandler.h"
#include "ManagedInterface.h"
#include "SystemEventHandler.h"
#include <vcclr.h>

using namespace ::System;

namespace SpinnakerNET
{
    // forward declaration
    ref class ManagedSystemEvent;

    // Intermediate delegate and function pointer for InterfaceArrivalEvent
    delegate void OnInterfaceArrivalDelegate(Spinnaker::InterfacePtr);
    typedef void(__stdcall *OnInterfaceArrivalNative)(Spinnaker::InterfacePtr);

    // Intermediate delegate and function pointer for InterfaceRemovalEvent
    delegate void OnInterfaceRemovalDelegate(Spinnaker::InterfacePtr);
    typedef void(__stdcall *OnInterfaceRemovalNative)(Spinnaker::InterfacePtr);

    // We declare an intermediate class which inherits from SystemEvent (unmanaged abstract class).
    // We provide definitions for the virtual functions. These functions are the callbacks that
    // will be called from the unmanaged library. These functions call into the managed abstract
    // class.
    class SystemEventRedirector : public Spinnaker::SystemEventHandler
    {
    public:
        SystemEventRedirector(OnInterfaceArrivalDelegate^ delegate1, OnInterfaceRemovalDelegate^ delegate2)
        {
            // Assign delegates
            m_OnInterfaceArrivalDelegate = delegate1;
            m_OnInterfaceRemovalDelegate = delegate2;

            // Fetch function pointers.
            m_OnInterfaceArrivalNative = (OnInterfaceArrivalNative)Marshal::GetFunctionPointerForDelegate(m_OnInterfaceArrivalDelegate).ToPointer();
            m_OnInterfaceRemovalNative = (OnInterfaceRemovalNative)Marshal::GetFunctionPointerForDelegate(m_OnInterfaceRemovalDelegate).ToPointer();
        }
    protected:
        virtual void OnInterfaceArrival(Spinnaker::InterfacePtr);
        virtual void OnInterfaceRemoval(Spinnaker::InterfacePtr);

    private:
        gcroot<OnInterfaceArrivalDelegate^> m_OnInterfaceArrivalDelegate;
        OnInterfaceArrivalNative m_OnInterfaceArrivalNative;
        gcroot<OnInterfaceRemovalDelegate^> m_OnInterfaceRemovalDelegate;
        OnInterfaceRemovalNative m_OnInterfaceRemovalNative;
    };

    // Managed abstract interface event base class
    // The event callbacks, ie.  On<Event>() functions will be called via the internal
    // CallOn<Event>() calls.
    public ref class ManagedSystemEventHandler abstract : public ManagedEventHandler
    {
    public:
        ManagedSystemEventHandler();
        ~ManagedSystemEventHandler();
        !ManagedSystemEventHandler();

    protected:
        // Empty body so user can override only the one's they need
        virtual void OnInterfaceArrival(IManagedInterface^ /*iface*/) {};
        virtual void OnInterfaceRemoval(IManagedInterface^ /*iface*/) {};

    internal:
        void CallOnInterfaceArrival(Spinnaker::InterfacePtr);
        void CallOnInterfaceRemoval(Spinnaker::InterfacePtr);
    };
}

#endif // FLIR_SPINNAKER_MANAGED_SYSTEM_EVENT_H