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

    File: AuNetSocketOverlappedOperation.NT.cpp
    Date: 2022-8-17
    Author: Reece
***/
#include "Networking.hpp"
#include "AuNetSocketOverlappedOperation.hpp"
#include <Source/IO/Loop/LSEvent.hpp>

#include "AuNetSocket.NT.hpp"
#include "AuNetError.hpp"

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

        this->overlapped.hEvent = AuReinterpretCast<HANDLE>(AuStaticCast<AuLoop::LSEvent>(this->pEvent)->GetHandle());
    }

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

    {
        return this->FinishOperationEx(that, pWorker, bReturnCode, GetLastError());
    }

    bool SocketOverlappedOperation::FinishOperationEx(const AuSPtr<void> &that,
                                                      const AuSPtr<INetWorker> &pWorker,
                                                      bool bReturnCode,
                                                      DWORD dwErrorCode)
    {
        if (bReturnCode)
        {
            this->OnIOComplete();
            return true;
        }
        else
        {
            if (dwErrorCode == ERROR_IO_PENDING)
            {
                this->pSocket = that;
                SysAssert(pWorker->ToProcessor()->StartSimpleLSWatchEx(this->pEvent,
                                                                       AuSPtr<AuIO::IIOSimpleEventListener>(that, this),
                                                                       true));
                return true;
            }
            else
            {
                // ERROR
                SysPushErrorIO("Couldn't connect [overlapped] (0x{:x})", dwErrorCode);
                this->uOsError = dwErrorCode;
                return false;
            }
        }
    }

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

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

        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()
    {
        auto code = this->ToOsError();
        return (code != 0) &&
               (code != STATUS_PENDING);
    }

    AuUInt SocketOverlappedOperation::ToOsError()
    {
        if (this->uOsError)
        {
            return this->uOsError;
        }
        return this->uOsError ? this->uOsError : this->overlapped.Internal;
    }

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

        return this->ToOsError() != STATUS_PENDING;
    }

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