/***
    Copyright (C) 2024 J Reece Wilson (a/k/a "Reece"). All rights reserved.

    File: AuIOAPCLessWaitable.cpp
    Date: 2024-2-25
    Author: Reece
***/
#include <Source/RuntimeInternal.hpp>
#include "AuIOAPCLessWaitable.hpp"

namespace Aurora::IO::Async
{
    void APCLessEvent::OnFinishSleep()
    {
        if (auto pThat = AuTryLockMemoryType(this->wpParent))
        {
            pThat->CheckLocal();
        }
    }

    APCLessWaitable::APCLessWaitable()
    {
        this->threadId = AuThreads::GetThreadId();
    }

    AuSPtr<Loop::ILoopSource> APCLessWaitable::GetLoopSource()
    {
        AU_LOCK_GUARD(this->mutex);
        
        if (this->pCompletionGroup)
        {
            return this->pCompletionGroup->ToAnyLoopSource();
        }
        else if (this->pEvent)
        {
            return this->pEvent;
        }
        else
        {
            this->pEvent = AuMakeShared<APCLessEvent>();
            SysCheckNotNullMemory(this->pEvent, {});
            SysCheckReturn(this->pEvent->TryInit(false, false, true), {});
            this->pEvent->wpParent = this->SharedFromThis();
            return this->pEvent;
        }
    }
    
    bool APCLessWaitable::HasCompletedForGCWI()
    {
        return this->bHasFinished;
    }

    bool APCLessWaitable::HasNonTrivialCleanup()
    {
        return true;
    }

    void APCLessWaitable::CleanupForGCWI()
    {
        this->CheckLocal();
        AuResetMember(this->pCompletionGroup);
    }

    bool APCLessWaitable::HasBeenSignaled()
    {
        return this->bHasFinished;
    }

    void APCLessWaitable::SignalComplete()
    {
        AU_LOCK_GUARD(this->mutex);

        this->bHasFinished = true;

        if (this->pEvent)
        {
            this->pEvent->Set();
        }

        if (this->pCompletionGroup)
        {
            if (auto pOtherEvent = this->pCompletionGroup->GetTriggerLoopSource())
            {
                pOtherEvent->Set();
            }
        }
    }

    void APCLessWaitable::Reset()
    {
        if (this->pEvent)
        {
            this->pEvent->Reset();
        }

        this->bHasFinished = false;
    }

    void APCLessWaitable::CheckLocal()
    {
        if (!this->bHasFinished)
        {
            return;
        }

        if (this->threadId == AuThreads::GetThreadId())
        {
            this->OnOriginThreadComplete();
        }
    }

    bool APCLessWaitable::TryAttachToCompletionGroup(const AuSPtr<CompletionGroup::ICompletionGroup> &pCompletionGroup)
    {
        AU_LOCK_GUARD(this->mutex);

        if (!pCompletionGroup)
        {
            return false;
        }

        if (!this->pCompletionGroup)
        {
            return false;
        }

        this->pCompletionGroup = pCompletionGroup;
        return true;
    }

    AuSPtr<CompletionGroup::ICompletionGroup> APCLessWaitable::GetCompletionGroup()
    {
        AU_LOCK_GUARD(this->mutex);
        return this->pCompletionGroup;
    }
}