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

    File: IPCSink.cpp
    Date: 2022-6-16
    Author: Reece
***/
#include <Source/RuntimeInternal.hpp>
#include "IPCSink.hpp"

namespace Aurora::Logging::Sinks
{
    IPCSink::IPCSink(const AuSPtr<Aurora::IO::IPC::IPCPipe> &pPipe,
                     bool bLengthPrefixed) :
        pPipe_(pPipe),
        bLengthPrefixed_(bLengthPrefixed)
    {

    }

    bool IPCSink::Init()
    {
        return static_cast<bool>(this->pPipe_);
    }

    AuSPtr<IO::IPC::IPCPipe> IPCSink::ToPipe()
    {
        return this->pPipe_;
    }

    void IPCSink::OnMessageBlocking(AuUInt8 uLevel, const ConsoleMessage &msg)
    {
        AU_LOCK_GUARD(this->logMutex_);
        
        auto startOffset = this->logBuffer_.GetWriteOffset();

        if (this->bLengthPrefixed_)
        {
            if (this->logBuffer_.readPtr != this->logBuffer_.base)
            {
                SysPushErrorConcurrentAborted();
                return;
            }

            if (this->logBuffer_.base == this->logBuffer_.writePtr)
            {
                this->logBuffer_.Write<AuUInt32>(0);
            }
        }

        msg.Write(this->logBuffer_);

        if (!this->logBuffer_)
        {
            this->logBuffer_.writePtr = this->logBuffer_.base + startOffset;
        }
    }

    bool IPCSink::OnMessageNonblocking(AuUInt8 level, const ConsoleMessage &msg)
    {
        return true;
    }

    void IPCSink::OnFlush()
    {
        AU_LOCK_GUARD(this->logMutex_);

        if (!this->logBuffer_.RemainingBytes())
        {
            return;
        }

        if (this->bLengthPrefixed_ &&
            this->logBuffer_.readPtr == this->logBuffer_.base)
        {
            auto len = this->logBuffer_.writePtr - this->logBuffer_.base;

            this->logBuffer_.writePtr = this->logBuffer_.base;
            this->logBuffer_.Write<AuUInt32>(len);
            this->logBuffer_.writePtr = this->logBuffer_.base + len;
        }

        AuUInt uWritten {};
        this->pPipe_->Write(AuMemoryViewStreamRead(this->logBuffer_, uWritten));

        this->logBuffer_.readPtr += uWritten;
        if (this->logBuffer_.readPtr == this->logBuffer_.writePtr)
        {
            this->logBuffer_.ResetPositions();
        }
    }

    IIPCLogger *NewIPCSinkNew(const AuString &str, bool lengthPrefixed)
    {
        auto pipe = AuIPC::ImportPipe(str);
        if (!pipe)
        {
            return nullptr;
        }

        auto logger = _new IPCSink(pipe, lengthPrefixed);
        if (!logger)
        {
            return nullptr;
        }

        if (!logger->Init())
        {
            return nullptr;
        }

        return logger;
    }

    void NewIPCSinkRelease(IIPCLogger *logger)
    {
        AuSafeDelete<IPCSink *>(logger);
    }
}