/*
	cl_slist.c

	serverlist addressbook

	Copyright (C) 2000       Brian Koropoff <brian.hk@home.com>

	Author: Brian Koropoff
	Date: 03 May 2000

	This program is free software; you can redistribute it and/or
	modify it under the terms of the GNU General Public License
	as published by the Free Software Foundation; either version 2
	of the License, or (at your option) any later version.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

	See the GNU General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with this program; if not, write to:

		Free Software Foundation, Inc.
		59 Temple Place - Suite 330
		Boston, MA  02111-1307, USA

	$Id$
*/

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifdef HAVE_NETINET_IN_H
# include <netinet/in.h>
#endif
#ifdef HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#ifdef HAVE_SYS_TIME_H
# include <sys/time.h>
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <stdlib.h>

#include "bothdefs.h"
#include "cl_main.h"
#include "cl_slist.h"
#include "client.h"
#include "QF/cmd.h"
#include "commdef.h"
#include "QF/console.h"
#include "QF/quakefs.h"
#include "QF/sys.h"
#include "QF/va.h"

server_entry_t *slist;
int slist_last_details;

server_entry_t *
SL_Add (server_entry_t *start, char *ip, char *desc)
{
	server_entry_t *p;

	p = start;
	if (!start) {						// Nothing at beginning of list,
										// create it
		start = calloc (1, sizeof (server_entry_t));

		start->prev = 0;
		start->next = 0;
		start->server = malloc (strlen (ip) + 1);
		start->desc = malloc (strlen (desc) + 1);
		strcpy (start->server, ip);
		strcpy (start->desc, desc);
		return (start);
	}

	for (p = start; p->next; p = p->next);	// Get to end of list

	p->next = calloc (1, sizeof (server_entry_t));

	p->next->prev = p;
	p->next->server = malloc (strlen (ip) + 1);
	p->next->desc = malloc (strlen (desc) + 1);

	strcpy (p->next->server, ip);
	strcpy (p->next->desc, desc);

	return (start);
}

server_entry_t *
SL_Del (server_entry_t *start, server_entry_t *del)
{
	server_entry_t *n;

	if (del == start) {
		free (start->server);
		free (start->desc);
		n = start->next;
		if (n)
			n->prev = 0;
		free (start);
		return (n);
	}

	free (del->server);
	free (del->desc);
	if (del->status)
		free (del->status);
	if (del->prev)
		del->prev->next = del->next;
	if (del->next)
		del->next->prev = del->prev;
	free (del);
	return (start);
}

server_entry_t *
SL_InsB (server_entry_t *start, server_entry_t *place, char *ip, char *desc)
{
	server_entry_t *new;
	server_entry_t *other;

	new = calloc (1, sizeof (server_entry_t));

	new->server = malloc (strlen (ip) + 1);
	new->desc = malloc (strlen (desc) + 1);
	strcpy (new->server, ip);
	strcpy (new->desc, desc);
	other = place->prev;
	if (other)
		other->next = new;
	place->prev = new;
	new->next = place;
	new->prev = other;
	if (!other)
		return new;
	return start;
}

void
SL_Swap (server_entry_t *swap1, server_entry_t *swap2)
{
	server_entry_t *next1, *next2, *prev1, *prev2;
	int i;
	
	next1 = swap1->next;
	next2 = swap2->next;
	prev1 = swap1->prev;
	prev2 = swap2->prev;

	for (i = 0; i < sizeof(server_entry_t); i++)
	{
		((char *)swap1)[i] ^= ((char *)swap2)[i];
		((char *)swap2)[i] ^= ((char *)swap1)[i];
		((char *)swap1)[i] ^= ((char *)swap2)[i];
	}

	swap1->next = next1;
	swap2->next = next2;
	swap1->prev = prev1;
	swap2->prev = prev2;
}

server_entry_t *
SL_Get_By_Num (server_entry_t *start, int n)
{
	int         i;

	for (i = 0; i < n; i++)
		start = start->next;
	if (!start)
		return (0);
	return (start);
}

int
SL_Len (server_entry_t *start)
{
	int         i;

	for (i = 0; start; i++)
		start = start->next;
	return i;
}

server_entry_t *
SL_LoadF (QFile *f, server_entry_t *start)
{										// This could get messy
	char        line[256];				/* Long lines get truncated. */
	int         c = ' ';				/* int so it can be compared to EOF

										   properly */
	int         len;
	int         i;
	char       *st;
	char       *addr;

	while (1) {
		// First, get a line
		i = 0;
		c = ' ';
		while (c != '\n' && c != EOF) {
			c = Qgetc (f);
			if (i < 255) {
				line[i] = c;
				i++;
			}
		}
		line[i - 1] = '\0';				// Now we can parse it
		if ((st = gettokstart (line, 1, ' ')) != NULL) {
			len = gettoklen (line, 1, ' ');
			addr = malloc (len + 1);
			strncpy (addr, &line[0], len);
			addr[len] = '\0';
			if ((st = gettokstart (line, 2, ' '))) {
				start = SL_Add (start, addr, st);
			} else {
				start = SL_Add (start, addr, "Unknown");
			}
		}
		if (c == EOF)					// We're done
			return start;
	}
}

void
SL_SaveF (QFile *f, server_entry_t *start)
{
	do {
		Qprintf (f, "%s   %s\n", start->server, start->desc);
		start = start->next;

	} while (start);
}

void
SL_Shutdown (server_entry_t *start)
{
	QFile      *f;
	char        e_path[MAX_OSPATH];

	if (start) {
		Qexpand_squiggle (fs_userpath->string, e_path);
		if ((f = Qopen (va ("%s/servers.txt", e_path), "w"))) {
			SL_SaveF (f, start);
			Qclose (f);
		}
		SL_Del_All (start);
	}
}

void
SL_Del_All (server_entry_t *start)
{
	server_entry_t *n;

	while (start) {
		n = start->next;
		free (start->server);
		free (start->desc);
		if (start->status)
			free (start->status);
		free (start);
		start = n;
	}
}



char       *
gettokstart (char *str, int req, char delim)
{
	char       *start = str;

	int         tok = 1;

	while (*start == delim) {
		start++;
	}
	if (*start == '\0')
		return '\0';
	while (tok < req) {					// Stop when we get to the requested
										// token
		if (*++start == delim) {		// Increment pointer and test
			while (*start == delim) {	// Get to next token
				start++;
			}
			tok++;
		}
		if (*start == '\0') {
			return '\0';
		}
	}
	return start;
}

int
gettoklen (char *str, int req, char delim)
{
	char       *start = 0;

	int         len = 0;

	start = gettokstart (str, req, delim);
	if (start == '\0') {
		return 0;
	}
	while (*start != delim && *start != '\0') {
		start++;
		len++;
	}
	return len;
}

void timepassed (double time1, double *time2)
{
	*time2 -= time1;
}

void
SL_Con_List (server_entry_t *sldata)
{
	int serv;
	server_entry_t *cp;

	for(serv = 0; serv < SL_Len (sldata); serv++)
	{
		cp = SL_Get_By_Num (sldata, serv);
		Con_Printf("%i) %s\n",(serv + 1),cp->desc);
	}
}

void
SL_Connect (server_entry_t *sldata, int slitemno)
{
	CL_Disconnect ();
	strncpy (cls.servername, SL_Get_By_Num (sldata, (slitemno - 1))->server,
		sizeof (cls.servername) - 0);
	CL_BeginServerConnect ();
}


void
SL_Update (server_entry_t *sldata)
{
	// FIXME - Need to change this so the info is not sent in 1 burst
	//         as it appears to be causing the occasional problem
	//         with some servers

	int serv;
	netadr_t addy;
	server_entry_t *cp;
	char data_ping[] = "\377\377\377\377k";
	char data_status[] = "\377\377\377\377status";
	
	for (serv = 0; serv < SL_Len (sldata); serv++)
	{
		cp = SL_Get_By_Num (sldata, serv);
		NET_StringToAdr (cp->server, &addy);

		if (!addy.port)
			addy.port = ntohs (27500);

		cp->pingsent = Sys_DoubleTime ();
		cp->pongback = 0;
		NET_SendPacket (6, data_ping, addy);
		NET_SendPacket (11, data_status, addy);
		cp->waitstatus = 1;
								
	}
}

void
SL_Con_Details (server_entry_t *sldata, int slitemno)
{
	int i, playercount;
	server_entry_t *cp;
	playercount = 0;
	slist_last_details = slitemno;
	cp = SL_Get_By_Num (sldata, (slitemno - 1));
	Con_Printf("Server: %s\n", cp->server);
	Con_Printf("Ping: ");
	if (cp->pongback)
		Con_Printf("%i\n", (int)(cp->pongback * 1000));
	else
		Con_Printf("N/A\n");
	if (cp->status)
	{
		Con_Printf("Game: %s\n", Info_ValueForKey (cp->status, "*gamedir"));
		Con_Printf("Map: %s\n", Info_ValueForKey (cp->status, "map"));
		for (i = 0; i < strlen(cp->status); i++)
			if (cp->status[i] == '\n')
				playercount++;
		Con_Printf("Players: %i/%s\n", playercount, Info_ValueForKey(cp->status, "maxclients"));
	} else
		Con_Printf("No Details Available\n");
}

void
SL_Command (void)
{
	int sltemp = 0;
	
	if (Cmd_Argc () == 1)
		SL_Con_List(slist); 
	else if (strcasecmp(Cmd_Argv(1),"update") == 0)
	{
		if (Cmd_Argc () == 2)
			SL_Update(slist);
		else
			Con_Printf("Syntax: slist update\n");
	}
	else if (strcasecmp(Cmd_Argv(1),"connect") == 0)
	{
		if (Cmd_Argc () == 3)
		{
			sltemp = atoi(Cmd_Argv(2)); 
			if(sltemp && (sltemp <= SL_Len (slist)))
				SL_Connect(slist,sltemp);
			else
				Con_Printf("Error: Invalid Server Number -> %s\n",Cmd_Argv(2));
		} 
		else if ((Cmd_Argc () == 2) && slist_last_details)
			SL_Connect(slist,slist_last_details);
		else
			Con_Printf("Syntax: slist connect #\n");
	}
	else
	{
		sltemp = atoi(Cmd_Argv(1));
		if((Cmd_Argc () == 2) && sltemp && (sltemp <= SL_Len (slist)))
			SL_Con_Details(slist,sltemp);
	}
}

void SList_Init (void)
{
	QFile      *servlist;
	char        e_path[MAX_OSPATH];

	Qexpand_squiggle (fs_userpath->string, e_path);
	if ((servlist = Qopen (va ("%s/servers.txt", e_path), "r"))) {
		slist = SL_LoadF (servlist, slist);
		Qclose (servlist);
	} else {
		Qexpand_squiggle (fs_sharepath->string, e_path);
		if ((servlist = Qopen (va ("%s/servers.txt", e_path), "r"))) {
			slist = SL_LoadF (servlist, slist);
			Qclose (servlist);
		}
	}
	Cmd_AddCommand("slist",SL_Command,"console commands to access server list\n");
}