/*
   Provides a log file to ease tracing the program.

   Copyright (C) 2006, 2009 Free Software Foundation, Inc.

   Written: 2006 Roland Illig <roland.illig@gmx.de>.

   This file is part of the Midnight Commander.

   The Midnight Commander 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.

   The Midnight Commander 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.
 */

/** \file logging.c
 *  \brief Source: provides a log file to ease tracing the program
 */

#include <config.h>

#include <stdarg.h>
#include <stdio.h>

#include "lib/global.h"
#include "lib/mcconfig.h"
#include "lib/fileloc.h"

#include "src/main.h"           /* home_dir */

#include "logging.h"

/*** global variables ****************************************************************************/

/*** file scope macro definitions ****************************************************************/

/*** file scope type declarations ****************************************************************/

/*** file scope variables ************************************************************************/

/*** file scope functions ************************************************************************/
/* --------------------------------------------------------------------------------------------- */

static gboolean
is_logging_enabled (void)
{
    static gboolean logging_initialized = FALSE;
    static gboolean logging_enabled = FALSE;

    if (!logging_initialized)
    {
        logging_enabled = mc_config_get_bool (mc_main_config,
                                              CONFIG_APP_SECTION, "development.enable_logging",
                                              FALSE);
        logging_initialized = TRUE;
    }
    return logging_enabled;
}

/* --------------------------------------------------------------------------------------------- */

static void
mc_va_log (const char *fmt, va_list args)
{
    FILE *f;
    char *logfilename;

    logfilename = g_build_filename (mc_config_get_cache_path (), "mc.log", NULL);
    if (logfilename != NULL)
    {
        f = fopen (logfilename, "a");
        if (f != NULL)
        {
            (void) vfprintf (f, fmt, args);
            (void) fclose (f);
        }
        g_free (logfilename);
    }

}

/* --------------------------------------------------------------------------------------------- */
/*** public functions ****************************************************************************/
/* --------------------------------------------------------------------------------------------- */

void
mc_log (const char *fmt, ...)
{
    va_list args;

    if (!is_logging_enabled ())
        return;

    va_start (args, fmt);
    mc_va_log (fmt, args);
    va_end (args);
}

/* --------------------------------------------------------------------------------------------- */

void
mc_always_log (const char *fmt, ...)
{
    va_list args;

    va_start (args, fmt);
    mc_va_log (fmt, args);
    va_end (args);
}

/* --------------------------------------------------------------------------------------------- */