/*
Contains the control routines that handle both incoming and outgoing stuff
*/

#include "qtv.h"



// char *date = "Oct 24 1996";
static char *date = __DATE__ ;
static char *mon[12] =
{ "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" };
static char mond[12] =
{ 31,    28,    31,    30,    31,    30,    31,    31,    30,    31,    30,    31 };

// returns days since Oct 24 1996
int build_number( void )
{
	int m = 0;
	int d = 0;
	int y = 0;
	static int b = 0;

	if (b != 0)
		return b;

	for (m = 0; m < 11; m++)
	{
		if (strncmp( &date[0], mon[m], 3 ) == 0)
			break;
		d += mond[m];
	}

	d += atoi( &date[4] ) - 1;

	y = atoi( &date[7] ) - 1900;

	b = d + (int)((y - 1) * 365.25);

	if (((y % 4) == 0) && m > 1)
	{
		b += 1;
	}

	b -= 35778; // Dec 16 1998

	return b;
}



typedef struct {
	char name[56];
	int offset;
	int length;
} pakfile;
// PACK, offset, lengthofpakfiles
FILE *FindInPaks(char *gamedir, char *filename, int *size)
{
	FILE *f;
	char fname[1024];
	int i, j;
	int numfiles;
	unsigned int header[3];

	pakfile pf;

	for (i = 0; ; i++)
	{
		sprintf(fname, "%s/pak%i.pak", gamedir, i);
		f = fopen(fname, "rb");
		if (!f)
			return NULL;	//ran out of possible pak files.

		fread(header, 1, sizeof(header), f);
		if (header[0] != *(unsigned int*)"PACK")
		{	//err... hmm.
			fclose(f);
			continue;
		}
		numfiles = LittleLong(header[2])/sizeof(pakfile);
		fseek(f, LittleLong(header[1]), SEEK_SET);
		for (j = 0; j < numfiles; j++)
		{
			fread(&pf, 1, sizeof(pf), f);
			if (!strcmp(pf.name, filename))
			{
				fseek(f, LittleLong(pf.offset), 0);
				if (size)
					*size = LittleLong(pf.length);
				return f;
			}
		}
		fclose(f);
		//not found
	}
	return NULL;
}

unsigned char *FS_ReadFile2(char *gamedir, char *filename, unsigned int *sizep)
{
	int size;
	unsigned char *data;

	FILE *f;
	char fname[1024];

	if (!*filename)
		return NULL;

	//try and read it straight out of the file system
	sprintf(fname, "%s/%s", gamedir, filename);
	f = fopen(fname, "rb");
	if (!f)
		f = fopen(filename, "rb");	//see if we're being run from inside the gamedir
	if (!f)
	{
		f = FindInPaks(gamedir, filename, &size);
		if (!f)
			f = FindInPaks("id1", filename, &size);
		if (!f)
		{
			return NULL;
		}
	}
	else
	{
		fseek(f, 0, SEEK_END);
		size = ftell(f);
		fseek(f, 0, SEEK_SET);
	}
	data = malloc(size);
	if (data)
		fread(data, 1, size, f);
	fclose(f);

	if (sizep)
		*sizep = size;
	return data;
}

unsigned char *FS_ReadFile(char *gamedir, char *filename, unsigned int *size)
{
	char *data;
	if (!gamedir || !*gamedir || !strcmp(gamedir, "qw"))
		data = NULL;
	else
		data = FS_ReadFile2(gamedir, filename, size);
	if (!data)
	{
		data = FS_ReadFile2("qw", filename, size);
		if (!data)
		{
			data = FS_ReadFile2("id1", filename, size);
			if (!data)
			{
				return NULL;
			}
		}
	}
	return data;
}


void Cluster_Run(cluster_t *cluster, qboolean dowait)
{
	oproxy_t *pend, *pend2, *pend3;
	sv_t *sv, *old;

	int m;
	struct timeval timeout;
	fd_set socketset;

	if (dowait)
	{

		FD_ZERO(&socketset);
		m = 0;
		if (cluster->qwdsocket != INVALID_SOCKET)
		{
			FD_SET(cluster->qwdsocket, &socketset);
			if (cluster->qwdsocket >= m)
				m = cluster->qwdsocket+1;
		}

		for (sv = cluster->servers; sv; sv = sv->next)
		{
			if (sv->usequkeworldprotocols && sv->sourcesock != INVALID_SOCKET)
			{
				FD_SET(sv->sourcesock, &socketset);
				if (sv->sourcesock >= m)
					m = sv->sourcesock+1;
			}
		}

	#ifndef _WIN32
		#ifndef STDIN
			#define STDIN 0
		#endif
		FD_SET(STDIN, &socketset);
		if (STDIN >= m)
			m = STDIN+1;
	#endif

		timeout.tv_sec = 100/1000;
		timeout.tv_usec = (100%1000)*1000;

		m = select(m, &socketset, NULL, NULL, &timeout);

#ifdef _WIN32
		for (;;)
		{
			char buffer[8192];
			char *result;
			char c;

			if (!_kbhit())
				break;
			c = _getch();

			if (c == '\n' || c == '\r')
			{
				Sys_Printf(cluster, "\n");
				if (cluster->inputlength)
				{
					cluster->commandinput[cluster->inputlength] = '\0';
					result = Rcon_Command(cluster, NULL, cluster->commandinput, buffer, sizeof(buffer), true);
					Sys_Printf(cluster, "%s", result);
					cluster->inputlength = 0;
					cluster->commandinput[0] = '\0';
				}
			}
			else if (c == '\b')
			{
				if (cluster->inputlength > 0)
				{
					Sys_Printf(cluster, "%c", c);
					Sys_Printf(cluster, " ", c);
					Sys_Printf(cluster, "%c", c);

					cluster->inputlength--;
					cluster->commandinput[cluster->inputlength] = '\0';
				}
			}
			else
			{
				Sys_Printf(cluster, "%c", c);
				if (cluster->inputlength < sizeof(cluster->commandinput)-1)
				{
					cluster->commandinput[cluster->inputlength++] = c;
					cluster->commandinput[cluster->inputlength] = '\0';
				}
			}
		}
#else
		if (FD_ISSET(STDIN, &socketset))
		{
			char buffer[8192];
			char *result;
			cluster->inputlength = read (0, cluster->commandinput, sizeof(cluster->commandinput));
			if (cluster->inputlength >= 1)
			{
				cluster->commandinput[cluster->inputlength-1] = 0;        // rip off the /n and terminate

				if (cluster->inputlength)
				{
					cluster->commandinput[cluster->inputlength] = '\0';
					result = Rcon_Command(cluster, NULL, cluster->commandinput, buffer, sizeof(buffer), true);
					printf("%s", result);
					cluster->inputlength = 0;
					cluster->commandinput[0] = '\0';
				}
			}
		}
#endif
	}



	cluster->curtime = Sys_Milliseconds();

	for (sv = cluster->servers; sv; )
	{
		old = sv;
		sv = sv->next;
		QTV_Run(old);
	}

	SV_FindProxies(cluster->tcpsocket, cluster, NULL);	//look for any other proxies wanting to muscle in on the action.

	QW_UpdateUDPStuff(cluster);

	while(cluster->pendingproxies)
	{
		pend2 = cluster->pendingproxies->next;
		if (SV_ReadPendingProxy(cluster, cluster->pendingproxies))
			cluster->pendingproxies = pend2;
		else
			break;
	}
	if (cluster->pendingproxies)
	{
		for(pend = cluster->pendingproxies; pend && pend->next; )
		{
			pend2 = pend->next;
			pend3 = pend2->next;
			if (SV_ReadPendingProxy(cluster, pend2))
			{
				pend->next = pend3;
				pend = pend3;
			}
			else
			{
				pend = pend2;
			}
		}
	}
}





void DoCommandLine(cluster_t *cluster, int argc, char **argv)
{
	int i;
	char commandline[8192];
	char *start, *end, *result;
	char buffer[8192];

	result = Rcon_Command(cluster, NULL, "exec qtv.cfg", buffer, sizeof(buffer), true);
	Sys_Printf(cluster, "%s", result);

	commandline[0] = '\0';

	//build a block of strings.
	for (i = 1; i < argc; i++)
	{
		strcat(commandline, argv[i]);
		strcat(commandline, " ");
	}
	strcat(commandline, "+");
	
	start = commandline;
	while(start)
	{
		end = strchr(start+1, '+');
		if (end)
			*end = '\0';
		if (start[1])
		{
			result = Rcon_Command(cluster, NULL, start+1, buffer, sizeof(buffer), true);
			Sys_Printf(cluster, "%s", result);
		}

		start = end;
	}
}

int main(int argc, char **argv)
{
	cluster_t cluster;

#ifndef _WIN32
#ifdef SIGPIPE
	signal(SIGPIPE, SIG_IGN);
#endif
#endif

#ifdef _WIN32
	{
		WSADATA discard;
		WSAStartup(MAKEWORD(2,0), &discard);
	}
#endif

	memset(&cluster, 0, sizeof(cluster));

	cluster.qwdsocket = INVALID_SOCKET;
	cluster.tcpsocket = INVALID_SOCKET;
	cluster.qwlistenportnum = 0;
	cluster.allownqclients = true;
	strcpy(cluster.hostname, DEFAULT_HOSTNAME);
	cluster.buildnumber = build_number();

	Sys_Printf(&cluster, "QTV Build %i.\n", cluster.buildnumber);

	if (argc >= 2 && (!strcmp(argv[1], "-view") || !strcmp(argv[1], "-play")))
	{
#ifdef VIEWER
		sv_t *sv;
		sv_t *svtest;
		char sourcename[256];
		char *s;
		printf("Please enter a QTV source\n");
		printf("eg: file:test.mvd\n");
		printf("eg: udp:localhost:27500\n");
		printf("eg: tcp:localhost:27599\n");
		fgets(sourcename, sizeof(sourcename), stdin);
		for (s = sourcename + strlen(sourcename)-1; s>=sourcename; s--)
		{
			if (*s == '\r' || *s == '\n')
				*s = '\0';
			else
				break;
		}

		sv = QTV_NewServerConnection(&cluster, sourcename, "", false, false, true);
		if (!sv)
		{
			printf("Unable to connect\n");
			return 0;
		}
		if (!strcmp(argv[1], "-play"))
			sv->proxyplayer = true;
		DemoViewer_Init();
		while (!cluster.wanttoexit)
		{
			Cluster_Run(&cluster, false);

			for (svtest = cluster.servers; svtest; svtest = svtest->next)
			{	//not the cleanest way to do this, of course
				if (svtest == sv)
					break;
			}
			if (svtest)
				DemoViewer_Update(svtest);
			else
				cluster.wanttoexit = true;
		}
		DemoViewer_Shutdown();
		while(cluster.viewers)
			QW_FreeViewer(&cluster, cluster.viewers);
		while(cluster.servers)
			QTV_Shutdown(cluster.servers);
#else
		Sys_Printf(&cluster, "Demo viewer is not enabled in this build. Sorry.\n");
#endif
		return 0;
	}


	DoCommandLine(&cluster, argc, argv);

	if (!cluster.numservers)
	{	//probably running on a home user's computer
		if (cluster.qwdsocket == INVALID_SOCKET && !cluster.qwlistenportnum)
		{
			cluster.qwdsocket = QW_InitUDPSocket(cluster.qwlistenportnum = 27599);
			if (cluster.qwdsocket != INVALID_SOCKET)
				Sys_Printf(&cluster, "opened udp port %i\n", cluster.qwlistenportnum);
		}
		if (cluster.tcpsocket == INVALID_SOCKET && !cluster.tcplistenportnum)
		{
			cluster.tcpsocket = Net_MVDListen(cluster.tcplistenportnum = 27599);
			if (cluster.tcpsocket != INVALID_SOCKET)
				Sys_Printf(&cluster, "opened tcp port %i\n", cluster.tcplistenportnum);
		}

		Sys_Printf(&cluster, "\n"
			"Welcome to FTEQTV\n"
			"Please type\n"
			"qtv server:port\n"
			" to connect to a tcp server.\n"
			"qw server:port\n"
			" to connect to a regular qw server.\n"
			"demo qw/example.mvd\n"
			" to play a demo from an mvd.\n"
			"\n");
	}

	while (!cluster.wanttoexit)
		Cluster_Run(&cluster, true);

	return 0;
}


void Sys_Printf(cluster_t *cluster, char *fmt, ...)
{
	va_list		argptr;
	char		string[2024];
	
	va_start (argptr, fmt);
	vsnprintf (string, sizeof(string), fmt,argptr);
	va_end (argptr);

	printf("%s", string);
}