/* $Id$
 * UDP Gateway utility
 * Copyright (C) 2004 Jan Kratochvil <project-udpgate@jankratochvil.net>
 * 
 * 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; exactly version 2 of June 1991 is required
 * 
 * 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 the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */


#include "config.h"

#include <glib/gmessages.h>
#include <popt.h>
#include <locale.h>
#include <stdlib.h>
#include <glib/gutils.h>
#include <string.h>
#include <setjmp.h>
#include <unistd.h>
#include <libgnome/gnome-program.h>
#include <libgnomeui/gnome-ui-init.h>

#include "main.h"	/* self */
#include "ui-gnome.h"
#include "ui-line.h"
#include "network.h"


/* Config: */
#define LOCAL_PORT_DEFAULT 9201


static int optarg_text;
int optarg_verbose;
int optarg_port=LOCAL_PORT_DEFAULT;
static int optarg_start;
static int optarg_stop;
int optarg_no_fork;

void (*ui_interactive)(void);

static const struct poptOption popt_table[]={

#define UDPGATE_POPT(shortname,longname,argInfoP,argP,valP,descripP,argDescripP) \
		{ \
			longName: (longname), \
			shortName: (shortname), \
			argInfo: (argInfoP)|(!(valP) ? 0 : POPT_ARG_VAL), \
			arg: (void *)argP, \
			val: (valP), \
			descrip: (descripP), \
			argDescrip: (argDescripP), \
		}

		UDPGATE_POPT(0  ,"text"   ,POPT_ARG_NONE                          ,&optarg_text   ,0,
				N_("Disable Gnome UI; --text must be first argument"),NULL),
		UDPGATE_POPT('v',"verbose",POPT_ARG_NONE                          ,&optarg_verbose,0,
				N_("Display additional debug information"),NULL),
		UDPGATE_POPT('p',"port"   ,POPT_ARG_INT |POPT_ARGFLAG_SHOW_DEFAULT,&optarg_port   ,0,
				N_("Listen on this UDP port"),NULL),
		UDPGATE_POPT('s',"start"  ,POPT_ARG_NONE                          ,&optarg_start  ,0,
				N_("Start the daemon"),NULL),
		UDPGATE_POPT('S',"stop"   ,POPT_ARG_NONE                          ,&optarg_stop   ,0,
				N_("Stop the daemon"),NULL),
		UDPGATE_POPT('1',"no-fork",POPT_ARG_NONE                          ,&optarg_no_fork,0,
				N_("Do not detach from the current process"),NULL),

#undef UDPGATE_POPT
		POPT_TABLEEND
		};

static const struct poptOption popt_table_autohelp[]={
		{ NULL,'\0',POPT_ARG_INCLUDE_TABLE,(struct poptOption *)&popt_table,0,PACKAGE },
		POPT_AUTOHELP
		POPT_TABLEEND
		};


static jmp_buf gnome_init_atexit_jmpbuf;
static gboolean gnome_init_atexit_disable;

static void gnome_init_atexit_handler(void)
{
	if (gnome_init_atexit_disable)
		return;

	longjmp(gnome_init_atexit_jmpbuf,1);
	g_assert_not_reached();
	_exit(EXIT_FAILURE);
}

static gboolean gnome_init_g_log_handler_hit;
static void gnome_init_g_log_handler(const gchar *log_domain,GLogLevelFlags log_level,const gchar *message,gpointer user_data)
{
	gnome_init_g_log_handler_hit=TRUE;
	g_log_default_handler(log_domain,log_level,message,user_data);
}

int main(int argc,char **argv)
{
poptContext context;
int errint;
gboolean is_interactive;
gboolean no_gnome;

#if 0
	g_log_set_always_fatal(~(0
			|G_LOG_LEVEL_MESSAGE
			|G_LOG_LEVEL_INFO
			|G_LOG_LEVEL_DEBUG
			));
#endif

	/* Initialize the i18n stuff */
	setlocale(LC_ALL,"");
	bindtextdomain(PACKAGE,LOCALEDIR);
	textdomain(PACKAGE);

	if (argv[1] && !strcmp(argv[1],"--text"))
		optarg_text=1;

	no_gnome=(optarg_text || !getenv("DISPLAY") || !*getenv("DISPLAY"));

	if (no_gnome) {
		context=poptGetContext(
				PACKAGE,	/* name */
				argc,(/*en-const*/const char **)argv,	/* argc,argv */
				popt_table_autohelp,	/* options */
				POPT_CONTEXT_POSIXMEHARDER);	/* flags; && !POPT_CONTEXT_KEEP_FIRST */
		if (context==NULL) {
			g_assert_not_reached();	/* argument recognization args_error */
			return EXIT_FAILURE;
			}
		errint=poptReadDefaultConfig(context,
				TRUE);	/* useEnv */
		if (errint!=0) {
			g_assert_not_reached();	/* argument recognization args_error */
			return EXIT_FAILURE;
			}
		errint=poptGetNextOpt(context);
		if (errint!=-1) {
			g_assert_not_reached();	/* some non-callbacked argument reached */
			return EXIT_FAILURE;
			}
		if (poptPeekArg(context)) {
			g_error(_("No arguments expected"));
			return EXIT_FAILURE;
			}
		}
	else {
GnomeProgram *gnome_program;
guint handler_id;

		gnome_init_atexit_disable=FALSE;
		g_atexit(gnome_init_atexit_handler);
		gnome_init_g_log_handler_hit=FALSE;
		handler_id=g_log_set_handler(
				"Gtk",	/* log_domain */
				G_LOG_LEVEL_WARNING,	/* log_levels */
				gnome_init_g_log_handler,	/* log_func */
				NULL);	/* user_data */
		if (!setjmp(gnome_init_atexit_jmpbuf))
			gnome_program=gnome_program_init(PACKAGE,VERSION,LIBGNOMEUI_MODULE,argc,argv,
					GNOME_PARAM_POPT_TABLE,popt_table,
					GNOME_PARAM_POPT_FLAGS,(int)POPT_CONTEXT_POSIXMEHARDER,
					NULL);
		else {
			no_gnome=TRUE;
			/* No message: (captive-install-acquire:3693): Gtk-WARNING **: cannot open display:
			 * was reported, probably only '--help' message was shown.
			 */
			if (!gnome_init_g_log_handler_hit)
				exit(EXIT_SUCCESS);
			}
		gnome_init_atexit_disable=TRUE;
		g_log_remove_handler(
				"Gtk",	/* log_domain */
				handler_id);	/* handler_id */
		}

	is_interactive=(1
			&& !optarg_start
			&& !optarg_stop);

	/* Initialize UI here to catch all GLog errors below. */
	if (is_interactive
			&& (no_gnome || !ui_gnome_init())
			&& !ui_line_init())
		g_error(_("No UI interface could be initialized"));

	if (!is_interactive) {
		if (optarg_stop)
			network_stop();
		if (optarg_start)
			network_start(optarg_port);
		network_detach();
		}
	else
		(*ui_interactive)();

	return EXIT_SUCCESS;
}