#include "tier2/ifilesystem.h"
#include "tier0/commandline.h"
#include "materialsystem/imaterialsystem.h"
#include "enginebridge.h"
#include "worldrender.h"
#include "entitysystem.h"
#include "baseentity.h"
#include "game.h"
#include "cglm/mat4.h"
#include "cglm/cglm.h"
#include "inetworkclient.h"
#include "netprotocol.h"
#ifdef STEAM
#include "steam/isteamgameserver.h"
#include "steam/steam_gameserver.h"
#endif

IFileSystem *filesystem;
IRenderContext *g_pRenderContext;
IGameWindow *g_pMainWindow;
static CEngineVars s_vars;
CEngineVars *g_pEngineVars = &s_vars;
EngineConsts_t *g_pEngineConstants;

INetworkBase *g_pServerBridge;
INetworkBase *g_pServerConnection;

class CFunnyGameBridge: public IEngineBridge
{
	virtual void Init() override;
	virtual void Tick( float fDelta ) override;
	virtual void Frame( float fDelta ) override;
	virtual void Shutdown() override;
	virtual void ConnectInterface( const char *psz, void *pInterface ) override;
	void TryToConnectToServer();

	bool m_bIsConnectedToSteamRelay;
	bool m_bIsConnectedToServer;

};

IEngineBridge *EngineBridge()
{
	static CFunnyGameBridge s_bridge;
	return &s_bridge;
}

EXPOSE_INTERFACE_FN(EngineBridge, IEngineBridge, ENGINE_BRIDGE_INTERFACE_VERSION)


void CFunnyGameBridge::Init()
{
	g_pWorldRenderer->Init();
#ifdef STEAM
	if (g_pEngineConstants->m_bIsSteam)
	{
		SteamErrMsg err = { 0 };
		m_bIsConnectedToSteamRelay = 0;
		SteamNetworkingUtils()->InitRelayNetworkAccess();
	}
#endif

	m_bIsConnectedToServer = false;
	g_pServerBridge = g_pEngineConstants->ConnectLocalBridge(0);
	if (g_pServerBridge)
	{
		PlayerJoined_t join = {
			MESSAGE_PLAYER_JOINED,
			"LocalPlayer"
		};
		g_pServerBridge->SendPacket({&join, sizeof(join)});
	}
}

void CFunnyGameBridge::Tick( float fDelta )
{
}

void *ENT_GetNetMapData(C_BaseEntity *pEntity, netmap_t *pMap, uint32_t uIndex )
{
	netmap_t *pCurrentMap = pMap;
	uint32_t uCurrentIndex = uIndex;
searchIndex:
	if (uCurrentIndex >= pCurrentMap->m_uFieldCount)
	{
		if (!pCurrentMap->m_uFieldCount)
			return NULL;
		uCurrentIndex -= pCurrentMap->m_uFieldCount;
		pCurrentMap = pCurrentMap->m_pBase;
		if (!pCurrentMap)
			return NULL;
		goto searchIndex;
	}
	
	return (char*)pEntity+pCurrentMap->m_pFields[uCurrentIndex].m_uOffset;
}

void CFunnyGameBridge::TryToConnectToServer()
{
#ifdef STEAM
	if (g_pEngineConstants->m_bIsSteam)
	{
		if (m_bIsConnectedToSteamRelay != 0 )
			return;
		if ( SteamNetworkingUtils()->GetRelayNetworkStatus(NULL) == k_ESteamNetworkingAvailability_Current)
		{
			m_bIsConnectedToSteamRelay = 1;
			V_printf("%llu\n", SteamUser()->GetSteamID().ConvertToUint64());
			if (CommandLine()->ParamValue("-steam-connect"))
			{
				char *pEnd = NULL;
				uint64_t uValue = strtoull(CommandLine()->ParamValue("-steam-connect"), &pEnd, 10);
				g_pServerConnection = g_pEngineConstants->ConnectSteamServer(uValue, FUNNY_SECURE_PORT);
				if (g_pServerConnection)
				{
					m_bIsConnectedToServer = true;
				}
				return;
			}
		}
	}
#endif
}

void CFunnyGameBridge::Frame( float fDelta )
{
	g_pEngineVars->m_fTime += fDelta;
	g_pEngineVars->m_fDeltaTime = fDelta;

	TryToConnectToServer();

	INetworkBase *pCurrentServer = g_pServerBridge;
	pCurrentServer = g_pServerBridge;
	if (m_bIsConnectedToServer)
		if (g_pServerConnection->BIsActive())
			pCurrentServer = g_pServerConnection;
	

	if (pCurrentServer)
	{
		pCurrentServer->NetThink();	
		while ( pCurrentServer->BHasUpdates() )
		{
			NetPacket_t packet = pCurrentServer->PeekPacket();
			// discard it
			if (packet.uSize < sizeof (EMessageType))
				continue;
			PlayerPacket_t *pPacket = (PlayerPacket_t*)packet.pData;
			C_BaseEntity *pEntity;
			switch (pPacket->m_eType)
			{
				case MESSAGE_ENTITY_CLASS_SYNC:
					pEntity = EntitySystem()->CreateByClassnameWithIndex(
							(char*)pPacket->m_entityClass.m_szEntityName, pPacket->m_entityClass.m_uIndex
							);
					if (pEntity == NULL)
					{
						pCurrentServer->RecievePacket();
						continue;
					}
					pEntity->Spawn();
					pCurrentServer->RecievePacket();
					break;
				case MESSAGE_ENTITY_DATA_SYNC:
					pEntity = EntitySystem()->GetEntities()[pPacket->m_entityData.m_uIndex];
					if (pEntity == NULL)
					{
						pCurrentServer->RecievePacket();
						continue;
					}
					union {
						void *pData;
						char *pcCurrentData;
						EntityDataSyncValue_t *pcSyncValue;
					};
					pData = pPacket;
					pcCurrentData += sizeof(EntityDataSync_t);
					for ( uint32_t u = 0; u < pPacket->m_entityData.m_uCount; u++ )
					{
						uint32_t uVariableSize = pcSyncValue->m_uVariableSize;
						void *pValueData = (float*)ENT_GetNetMapData(
								pEntity, 
								pEntity->GetRecvMap(), 
								pcSyncValue->m_uVariableIndex);

						pcCurrentData += sizeof(EntityDataSyncValue_t);
						if (pValueData)
							V_memcpy(pValueData, pcCurrentData, uVariableSize);
						pcCurrentData += (uVariableSize+7) & ~7;
					}
					pCurrentServer->RecievePacket();
					break;
				default:
					pCurrentServer->RecievePacket();
					V_printf("worng packet\n");
					continue;
			}
		}
	}

	EntitySystem()->Think();
	g_pWorldRenderer->Frame(fDelta);
}

void CFunnyGameBridge::Shutdown()
{

}

#define CONNECT_INTERFACE(szName, pGlobal) if (!V_strcmp(psz, szName)) { pGlobal = (typeof(pGlobal))pInterface; return; }
void CFunnyGameBridge::ConnectInterface( const char *psz, void *pInterface )
{
	CONNECT_INTERFACE(RENDER_CONTEXT_INTERFACE_VERSION, g_pRenderContext);
	CONNECT_INTERFACE(FILESYSTEM_INTERFACE_VERSION, filesystem);
	CONNECT_INTERFACE("MainWindow", g_pMainWindow);
	CONNECT_INTERFACE("EngineConstants", g_pEngineConstants);
}