#include "Flatline.h"
#include "Flatline_Server.h"


#define TRACK_PACKETS

/*thread */int UDPServer_Socket = 0;




bool NetUDPServer_Listen(uint16_t port, bool (*packet_callback)(char* data, int datalen, int from))
{
	sockaddr_in address;	
	UDPServer_Socket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
	
	if (UDPServer_Socket < 0)
	{
		DDrConsole_PrintF("could not create socket");
		return false;
	}
	

	memset(&address, 0, sizeof(sockaddr_in));
	address.sin_family = AF_INET;
	address.sin_addr.s_addr = htonl(INADDR_ANY);
	address.sin_port = htons(port);
	
	if (bind(UDPServer_Socket, (sockaddr*)&address, sizeof(sockaddr_in)) < 0)
	{
		DDrConsole_PrintF("could not bind port %d", port);
		closesocket(UDPServer_Socket);
		return false;
	}
	else {


		char data[65537] = {0};
	
		sockaddr_in from;
		int recvlen;
		FLrServer_Initialize();
		for (;;)
		{
			int fromlen = sizeof(sockaddr_in);
			memset(&from, 0, sizeof(sockaddr_in));
			recvlen = recvfrom(UDPServer_Socket, data, 65537 - 1, 0, (sockaddr*)&from, (void*)&fromlen);

			if (!packet_callback(data, recvlen, ntohl(from.sin_addr.s_addr)))
				break; 
		}
		closesocket(UDPServer_Socket);
		return true;
	}
}

bool NetUDPServer_Send(sockaddr* address, flatline_packet* data, int datalen)
{
	//DDrConsole_PrintF("Sending data size %u to %s on socket %i", datalen, inet_ntoa( ((sockaddr_in*)address)->sin_addr ), UDPServer_Socket);
	//data->FLATLINE = *(int*)"FLATLINE";
	return NetUDPSocket_Send(UDPServer_Socket, address, data, datalen);
}

int client_sock = 0;
sockaddr_in client_address;

int NetUDPSocket_Create(uint16_t port)
{
	int sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
	sockaddr_in address;	
		unsigned long nonBlocking = 1;
	if (sock < 0)
	{
		DDrConsole_PrintF("could not create socket");
		return -1;
	}
	

	memset(&client_address, 0, sizeof(sockaddr_in));
	address.sin_family = AF_INET;
	address.sin_addr.s_addr = htonl(INADDR_ANY);
	address.sin_port =  htons(port);
	
	if (bind(sock, (sockaddr*)&address, sizeof(sockaddr_in)) < 0)
	{
		DDrConsole_PrintF("could not bind port %d", port);
		return false;
	}
	

	if (ioctlsocket(sock, FIONBIO, &nonBlocking))
	{
		DDrConsole_PrintF("failed to set non-blocking socket");
		return false;
	}
	client_sock = sock;
	client_address = address;
	return sock;
}

int NetTCPSocket_Create(uint16_t port)
{
	int sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
	sockaddr_in address;
		unsigned long nonBlocking = 1;

	if (sock < 0)
	{
		DDrConsole_PrintF("could not create socket");
		return -1;
	}
	

	memset(&client_address, 0, sizeof(sockaddr_in));
	address.sin_family = AF_INET;
	address.sin_addr.s_addr = htonl(INADDR_ANY);
	address.sin_port =  htons(port);
	
	if (bind(sock, (sockaddr*)&address, sizeof(sockaddr_in)) < 0)
	{
		DDrConsole_PrintF("could not bind port %d", port);
		return false;
	}
	

	if (ioctlsocket(sock, FIONBIO, &nonBlocking))
	{
		DDrConsole_PrintF("failed to set non-blocking socket");
		return false;
	}
	client_sock = sock;
	client_address = address;
	return sock;
}


void NetUDPSocket_Close(int socket)
{
	closesocket(socket);
}

int NetUDPSocket_Send(int socket, const sockaddr* address, flatline_packet* data, int datalen)
{
	//currently only protects against duplicate packets.
	int addr_size;
#ifdef TRACK_PACKETS
	static uint32_t packet_index = 0;
	packet_index = (packet_index + 1);
	data->packet_index = packet_index;
#endif
	//data->FLATLINE = *(int*)"FLATLINE";
	switch (address->sa_family)
	{
		case AF_INET:
			addr_size = sizeof(sockaddr_in);
			break;
		case AF_INET6:
			addr_size = sizeof(sockaddr_in6);
			break;
		default:
			addr_size = sizeof(sockaddr_storage);
	}
	return sendto(socket, data, datalen, 0, address, addr_size);
}

#ifdef TRACK_PACKETS
uint32_t last_packet = -1;
#endif

bool NetUDPSocket_Recieve(int socket, sockaddr_storage* address, char* data, uint16_t* datalen)
{
	int address_size = sizeof(sockaddr_storage);
	uint32_t msg_size = recvfrom(socket, data, 1400, 0, (SOCKADDR *)address, &address_size);
	if (msg_size == 0)
		return false;
	else if (msg_size == SOCKET_ERROR) {
		int errorno = WSAGetLastError();
		if (errorno == WSAEWOULDBLOCK) return false; //no packets.
		else {
			//DDrConsole_PrintF("Packet type %i", ((flatline_packet*)data)->id);
			NetCatchError();
			return false;
		}
	}	
	/*
#ifdef TRACK_PACKETS
	if(client_connected && !server_started) {
		uint32_t index_mkr = ((flatline_packet*)(data))->packet_index;
		//fancy way of checking if index_mkr is on one side of the max size of an int and last_packet is on the other
		if( ((index_mkr - last_packet < 0x80000000) && (index_mkr > last_packet))
		//if it is, subtract half the size of an int from each. ^_^
			|| ((index_mkr - 0x80000000) > (last_packet - 0x80000000) ) )
		{
			return false;
		}
		else {
			last_packet = index_mkr;
		}
	}
	
#endif
	*/

	*datalen = msg_size;				
	return true;
	
}



DWORD WINAPI StartServer(void* lol){
	if(NetPlatform_Initalize() && FlatlineInitialize())
	{
		FLrServer_Run();
	}
	return 0;
} 

DWORD WINAPI StartClient(void* lol){
	//NetPlatform_Initalize();
	if(FlatlineInitialize())
	{
		FLrClient_Run((flatline_packet*)lol);
	}
	return 0;
} 
void NetCatchError(){
	char Message[1024];
	int errorno = WSAGetLastError();
	if(errno == WSAEWOULDBLOCK) {
		return;
	}
#ifdef WIN32

	FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS |
		FORMAT_MESSAGE_MAX_WIDTH_MASK, NULL, errorno,
		MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
		(LPSTR) Message, 1024, NULL);
	DDrConsole_Print(Message);
#endif

}