#include "input.h"
#include "tier1/commandline.h"
#include "tier1/utlstring.h"
#include "tier0/lib.h"
#include "console.h"
#include "filesystem.h"
#include "rendering.h"
#include "engine.h"
#include "baseentity.h"
#include "server.h"
#include "physics.h"
#include "signal.h"

double fPrev = 0;
double fCurrent = 0;

funnyphysics *px;

IIClient g_localClient;

CUtlVector<IIClient*> g_clients;

//-----------------------------------------------------------------------------
// Purpose: Engine entry point
//-----------------------------------------------------------------------------
extern "C" void FunnyMain( int argc, char **argv ) {
	
	ICommandLine::CreateCommandLine(argc, argv);
	IEngine::Init();
	for (;;)
	{
		fPrev = fCurrent;
		fCurrent = Plat_GetTime();
		IEngine::Frame(fCurrent-fPrev);
	};
	/* deinit is handled explicitly */
};

//-----------------------------------------------------------------------------
// Purpose: Recieves signals from the system
//-----------------------------------------------------------------------------
void IEngine_Signal(int sig)
{
	printf("Trapped signal %i\n",sig);
	switch (sig)
	{
	case SIGSEGV:
	case SIGILL:
	case SIGABRT:
		printf("Consider running app with debugger attached\n");
		Plat_Backtrace();
		break;
	default:
		break;
	};
	IEngine::Shutdown();
	_exit(0);
};

//-----------------------------------------------------------------------------
// Purpose: Initializes engine
//-----------------------------------------------------------------------------
void IEngine::Init()
{
	/* trap signals */
	#ifdef __linux
	signal(SIGHUP, IEngine_Signal);
	signal(SIGINT, IEngine_Signal);
	signal(SIGQUIT, IEngine_Signal);
	signal(SIGILL, IEngine_Signal);
	signal(SIGTRAP, IEngine_Signal);
	signal(SIGIOT, IEngine_Signal);
	signal(SIGBUS, IEngine_Signal);
	signal(SIGFPE, IEngine_Signal);
	signal(SIGSEGV, IEngine_Signal);
	signal(SIGTERM, IEngine_Signal);
	#endif

	IFileSystem::InitFilesystem();
	px = px_init();

	if (!ICommandLine::CheckParam("-dedicated"))
	{
		g_localClient = {
		
		};
		IIEngine::ConnectClient(&g_localClient);

		IVideo::Init();
		IInput::Init();
	}
	IServer::LoadGame("funnygame");
};

//-----------------------------------------------------------------------------
// Purpose: Updates every frame
//-----------------------------------------------------------------------------
void IEngine::Frame(float fDelta)
{
	IServer::Think(fDelta);
	IVideo::Frame(fDelta);
};

//-----------------------------------------------------------------------------
// Purpose: Deinitializes engine 
//-----------------------------------------------------------------------------
void IEngine::Shutdown()
{

};

//-----------------------------------------------------------------------------
// Purpose: Spawns entity in the world
//-----------------------------------------------------------------------------
CBaseEntity *IIEngine::SpawnEntity( const char *szName )
{
	for (auto &entity: g_RegisteredEntities)
	{
		if (!V_strcmp(entity->m_szName, szName))
		{
			CBaseEntity *pEnt = entity->m_pfn();
			g_entities.AppendTail(pEnt);
			if (entity->m_pClientfn)
			{
				pEnt->pClientEntity = entity->m_pClientfn();
				pEnt->pClientEntity->pEntity = pEnt;
			}
			return pEnt;
		}
	}
	return 0;
};

//-----------------------------------------------------------------------------
// Purpose: Spawns entity without any parameters
//-----------------------------------------------------------------------------
void IIEngine::InitEntity( CBaseEntity *pEntity )
{
	if (!pEntity)
		return;
	pEntity->Spawn();
	if (pEntity->pClientEntity)
		pEntity->pClientEntity->Spawn();
};

//-----------------------------------------------------------------------------
// Purpose: Destroys entity 
//-----------------------------------------------------------------------------
void IIEngine::DestroyEntity( CBaseEntity *pEntity )
{

};

//-----------------------------------------------------------------------------
// Purpose: Connects client to the server
//-----------------------------------------------------------------------------
void IIEngine::ConnectClient( IIClient *pClient)
{
	g_clients.AppendTail(pClient);
}

//-----------------------------------------------------------------------------
// Purpose: Disconnects client from the server
//-----------------------------------------------------------------------------
void IIEngine::DisconnectClient( IIClient *pClient)
{
}