/************************************************************************
 * This file is part of Paramano.                                       *
 *                                                                      *
 * Paramano 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 3 of the   *
 * License, or (at your option) any later version.                      *
 *                                                                      *
 * Paramano 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 Paramano. If not, see                                     *
 * <http://www.gnu.org/licenses/>.                                      *
 ************************************************************************/

#include "config_file.h"
#include "defaults.h"

#include <gtk/gtk.h>
#include <glib.h>
#include <stdlib.h>
#include <libintl.h>

void config_init()
{
	struct config_file config;
	char *xdg_config_home;
	FILE* fd = NULL;

	config.key_file = NULL;
	
	/* Default to $HOME/.config/paramano.conf as specified in the XDG
	 * Base Directory Standard :
	 * <http://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html>
	 */
	xdg_config_home = getenv("XDG_CONFIG_HOME");
	if (xdg_config_home == NULL)
		xdg_config_home = g_strconcat(getenv("HOME"), "/.config", NULL);

	config.file_name = g_strconcat(xdg_config_home, "/paramano.conf", NULL);

	if( (fd = fopen(config.file_name, "r")) )
	{
		fclose(fd);
	} else {
		/* no (readable) user-specific config file, fall back */
		config.file_name = g_strconcat(PARAMANO_CONF, NULL);
	}

	if(!config_open(&config))
	{
		g_warning(_("Failed to open config files!\n"));
		return;
	}

	/* Reset defaults to default values */
	defaults_init();

	DEFAULT_GOV			= config_get_key(&config, "governor", "default");
	DEFAULT_FREQ		= config_get_key(&config, "frequency", "default");
	DEFAULT_BAT_GOV		= config_get_key(&config, "battery", "governor");
	DEFAULT_AC_GOV		= config_get_key(&config, "ac", "governor");

	char* temp;
	if ((temp = config_get_key(&config, "battery", "show")))
		DEFAULT_SHOW_BATTERY = ( temp[0] == '1' );

	if ((temp = config_get_key(&config, "extra", "theme")))
		snprintf(DEFAULT_THEME, sizeof(DEFAULT_THEME), "%s", temp);

	config_close(&config);
	g_free(config.file_name);
}

gboolean config_open(struct config_file* config_file)
{
	if(config_file->key_file)
		g_key_file_free(config_file->key_file);

	config_file->key_file = g_key_file_new();
	gboolean success = g_key_file_load_from_file(
										config_file->key_file,
										config_file->file_name,
										G_KEY_FILE_NONE,
										NULL);
	return success;
}

void config_close(struct config_file* config_file)
{
	g_key_file_free(config_file->key_file);
}

gchar* config_get_key(struct config_file* config_file, const gchar* group_name, const gchar* key_name)
{
	return g_key_file_get_value(config_file->key_file,
								group_name,
								key_name,
								NULL);
}