/***
    Copyright (C) 2023 J Reece Wilson (a/k/a "Reece"). All rights reserved.

    File: AuProcessEnvironment.Unix.cpp
    Date: 2023-7-10
    Author: Reece
***/
#include <Source/RuntimeInternal.hpp>
#include "AuProcessEnvironment.hpp"
#include "AuProcessEnvironment.Unix.hpp"
#include <stdlib.h>

namespace Aurora::Process
{
    static AuThreadPrimitives::Mutex gEnvMutex;

    AUKN_SYM AuList<AuPair<AuString, AuString>> EnvironmentGetAll()
    {
        AU_LOCK_GUARD(gEnvMutex);
        AuList<AuPair<AuString, AuString>> ret;

        auto pIterator = environ;
        while (auto pCurrent = *(pIterator++))
        {
            auto optSplit = EnvironmentSplitString(pCurrent);
            if (optSplit)
            {
                ret.push_back(optSplit.value());
            }
        }

        return ret;
    }

    AUKN_SYM AuOptional<AuString> EnvironmentGetOne(const AuString &key)
    {
        AU_LOCK_GUARD(gEnvMutex);
        
        if (key.empty())
        {
            SysPushErrorArg("Missing key");
            return {};
        }
        
        auto pValue = ::getenv(key.c_str());
        return pValue ? AuString(pValue) : AuOptional<AuString> {};
    }
    
    AUKN_SYM bool EnvironmentSetOne(const AuString &key, const AuString &value)
    {
        AU_LOCK_GUARD(gEnvMutex);

        if (key.empty())
        {
            SysPushErrorArg("Missing key");
            return false;
        }

        if (value.empty())
        {
            SysPushErrorArg("Missing value");
            return false;
        }
        
        return ::setenv(key.c_str(), value.c_str(), 1) == 0;
    }
    
    AUKN_SYM bool EnvironmentRemoveOne(const AuString &key)
    {
        AU_LOCK_GUARD(gEnvMutex);
        
        if (key.empty())
        {
            SysPushErrorArg("Missing key");
            return false;
        }
        
        return ::unsetenv(key.c_str()) == 0;
    }
}