/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
 *
 * Copyright (C) 2005 William Jon McCann <mccann@jhu.edu>
 *
 * 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 the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * Authors: William Jon McCann <mccann@jhu.edu>
 *
 */

#include "config.h"

#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include <signal.h>
#include <time.h>
#include <unistd.h>

#include <glib.h>
#include <glib/gstdio.h>

#include "gs-debug.h"

static gboolean debugging = FALSE;
static FILE    *debug_out = NULL;

/* Based on rhythmbox/lib/rb-debug.c */
/* Our own funky debugging function, should only be used when something
 * is not going wrong, if something *is* wrong use g_warning.
 */
void
gs_debug_real (const char *func,
	       const char *file,
	       const int   line,
	       const char *format, ...)
{
	va_list args;
	char    buffer [1025];
	char   *str_time;
	time_t  the_time;

	if (debugging == FALSE)
		return;

	va_start (args, format);

	g_vsnprintf (buffer, 1024, format, args);

	va_end (args);

	time (&the_time);
	str_time = g_new0 (char, 255);
	strftime (str_time, 254, "%H:%M:%S", localtime (&the_time));

	fprintf ((debug_out ? debug_out : stderr),
		 "[%s] %s:%d (%s):\t %s\n",
		 func, file, line, str_time, buffer);

	if (debug_out)
		fflush (debug_out);

	g_free (str_time);
}

gboolean
gs_debug_enabled (void)
{
	return debugging;
}

void
gs_debug_init (gboolean debug,
	       gboolean to_file)
{
	/* return if already initialized */
	if (debugging == TRUE) {
		return;
	}

	debugging = debug;

	if (debug && to_file) {
		const char path [50] = "gnome_screensaver_debug_XXXXXX";
		int        fd;

		fd = g_file_open_tmp (path, NULL, NULL);

		if (fd >= 0) {
			debug_out = fdopen (fd, "a");
		}
	}

	gs_debug ("Debugging %s", (debug) ? "enabled" : "disabled");
}

void
gs_debug_shutdown (void)
{
	if (! debugging)
		return;

	gs_debug ("Shutting down debugging");

	debugging = FALSE;

	if (debug_out != NULL) {
		fclose (debug_out);
		debug_out = NULL;
	}
}

void
_gs_profile_log (const char *func,
		 const char *note,
		 const char *format,
		 ...)
{
	va_list args;
	char   *str;
	char   *formatted;

	if (format == NULL) {
		formatted = g_strdup ("");
	} else {
		va_start (args, format);
		formatted = g_strdup_vprintf (format, args);
		va_end (args);
	}

	if (func != NULL) {
		str = g_strdup_printf ("MARK: %s %s: %s %s", g_get_prgname(), func, note ? note : "", formatted);
	} else {
		str = g_strdup_printf ("MARK: %s: %s %s", g_get_prgname(), note ? note : "", formatted);
	}

	g_free (formatted);

	g_access (str, F_OK);
	g_free (str);
}
