/***
    Copyright (C) 2022 J Reece Wilson (a/k/a "Reece"). All rights reserved.

    File: AuNetSocketOverlappedOperation.Unix.cpp
    Date: 2022-8-26
    Author: Reece
***/
#include "Networking.hpp"
#include "AuNetSocketOverlappedOperation.hpp"
#include <Source/IO/Loop/LSEvent.hpp>

#include "AuNetSocket.Unix.hpp"
#include "AuNetError.hpp"

namespace Aurora::IO::Net
{
    SocketOverlappedOperation::SocketOverlappedOperation(bool bMultipleTrigger) :
        bMultipleTrigger(bMultipleTrigger)
    {
        this->pEvent = AuLoop::NewLSEvent(false, true);
        if (!this->pEvent)
        {
            return;
        }

    }

    SocketOverlappedOperation::SocketOverlappedOperation(const AuSPtr<AuLoop::ILoopSource> &pTrigger)
    {
        this->pEvent = pTrigger;
    }

    bool SocketOverlappedOperation::FinishOperation(const AuSPtr<void> &pThat,
                                                    const AuSPtr<INetWorker> &pWorker,
                                                    bool bReturnCode)

    {
        return this->FinishOperationEx(pThat, pWorker, bReturnCode, errno);
    }

    bool SocketOverlappedOperation::FinishOperationEx(const AuSPtr<void> &pThat,
                                                      const AuSPtr<INetWorker> &pWorker,
                                                      bool bReturnCode,
                                                      AuUInt32 dwErrorCode)
    {
        if (bReturnCode)
        {
            this->OnIOComplete();
            return true;
        }
        else
        {
            if ((dwErrorCode == EAGAIN) ||
                (dwErrorCode == EINPROGRESS))
            {
                return this->BeginOperation(pThat, pWorker);
            }
            else
            {
                // ERROR
                SysPushErrorIO("Couldn't connect [overlapped] (0x{:x})", dwErrorCode);
                this->uOsError = dwErrorCode;
                return false;
            }
        }
    }

    bool SocketOverlappedOperation::BeginOperation(const AuSPtr<void> &that,
                                                   const AuSPtr<INetWorker> &pWorker)
    {
        this->pSocket = that;
        auto bStatus = pWorker->ToProcessor()->StartSimpleLSWatchEx(this->pEvent,
                                                                    AuSPtr<AuIO::IIOSimpleEventListener>(that, this),
                                                                    true);
        if (!bStatus)
        {
            this->pSocket.reset();
            return false;
        }

        return true;
    }

    void SocketOverlappedOperation::UpdateTrigger(const AuSPtr<AuLoop::ILoopSource> &pTrigger)
    {
        this->pEvent = pTrigger;
    }

    bool SocketOverlappedOperation::IsValid()
    {
        return bool(this->pEvent);
    }

    void SocketOverlappedOperation::OnIOTick()
    {
        if (!this->bMultipleTrigger)
        {
            return;
        }

        AuLogDbg("On tick");
        auto pTemp = AuExchange(this->pSocket, {});

        if (this->HasFailed())
        {
            this->OnOverlappedFailure(this->ToError());
        }
        else
        {
            this->OnOverlappedComplete();
        }
    }
    
    void SocketOverlappedOperation::OnIOComplete()
    {
        if (this->bMultipleTrigger)
        {
            return;
        }

        if (AuExchange(this->bHasFlipped, true))
        {
            return;
        }

        if (this->HasFailed())
        {
            this->OnOverlappedFailure(this->ToError());
        }
        else
        {
            this->OnOverlappedComplete();
        }

        this->pSocket.reset();
    }

    void SocketOverlappedOperation::OnIOFailure()
    {
        if (AuExchange(this->bHasFlipped, true))
        {
            return;
        }

        this->OnOverlappedFailure(this->ToError());
        this->pSocket.reset();
    }

    bool SocketOverlappedOperation::HasFailed()
    {
        return this->ToOsError() != 0;
    }

    AuUInt SocketOverlappedOperation::ToOsError()
    {
        if (this->uOsError)
        {
            return this->uOsError;
        }

        return this->uOsError;
    }

    bool SocketOverlappedOperation::HasComplete()
    {
        if (this->HasFailed())
        {
            return false;
        }

        return this->ToOsError() == 0;
    }

    NetError SocketOverlappedOperation::ToError()
    {
        NetError error;
        NetError_SetOsError(error, this->ToOsError());
        return error;
    }
}