/******************************************************************************
*	File		-	core.cpp
*	Author		-	Joey Pollack
*	Date		-	2021/08/30 (y/m/d)
*	Mod Date	-	2021/08/30 (y/m/d)
*	Description	-	The Core Engine Class. Manages the engine components.
******************************************************************************/

#include "core.h"
#include "Version.h"

namespace lunarium
{
    Core* Core::mpInstance = nullptr;
    Core::Core()
        : mbIsInit(false), mpArgs(nullptr)
    {
    
    }

    Core& Core::GetInstance()
    {
        if (!mpInstance)
        {
            mpInstance = new Core;
        }

        return *mpInstance;
    }

    void Core::Shutdown()
    {
        if (!mpInstance)
            return;

        // Shutdown subsystems

        delete mpInstance->mpArgs;
        mpInstance->mpArgs = nullptr;

        delete mpInstance;
        mpInstance = nullptr;
    }

    void Core::Initialize(int argc, char** argv, std::vector<LogListener*>& listeners)
    {
        // Setup the log system and add any listeners
        mpLog = Logger::GetInstance();

		mMasterLogFile.open("Element2D_Master.log", std::ios_base::app);
		mMasterLogFile << "\n\n";


		mErrorLogFile.open("Element2D_Errors.log", std::ios_base::app);
		mErrorLogFile << "\n\n";

		if (mMasterLogFile.is_open())
			mpLog->AddListener(new FileListener(mMasterLogFile));


		if (mErrorLogFile.is_open())
			mpLog->AddListener(new FileListener(mErrorLogFile, LogLevel::ERROR | LogLevel::FATAL_ERROR));
        
        for (unsigned i = 0; i < listeners.size(); i++)
        {
            mpLog->AddListener(listeners[i]);
        }

        Logger::Log(LogCategory::CORE, LogLevel::INFO, "Running Lunarium version %s", Version::GetVersion().ToString().c_str());

        // Attempt to load the engine state file. This file should be placed in the same directory as the lunarium program.
        mpLog->Log(LogCategory::CORE, LogLevel::INFO, "Attempting to load state file: lunarium_state.xml");
        if (Failed(State::CreateFromFile("lunarium_state.xml", mState)))
        {
            Logger::Log(LogCategory::CORE, LogLevel::WARNING, "Unable to load state file: lunarium_state.xml. Loading default state.");
            mState = State::CreateDefault();
        }

        // Parse command line args -- None right now
        std::vector<Args::SwitchDesc> sd;
        mpArgs = new Args(argc, argv, '-', sd);
    }

    bool Core::IsInit() const
    {
        return mbIsInit;
    }

    const State& Core::GetState() const
    {
        return mState;
    }
}