/*
 * Application configuration
 *
 * Copyright (C) 2017  Patrick McDermott
 *
 * This file is part of Marquee.
 *
 * Marquee 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.
 *
 * Marquee 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 Marquee.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <string.h>
#include <stdlib.h>

#include <glib.h>

#include "config.h"

typedef enum {
	TYPE_BOOLEAN,
} Type;

typedef struct {
	Type   type;
	GList *callbacks;
} ConfigItem;

static void
split_name(const gchar *name, gchar **group, gchar **key)
{
	*group = g_strdup(name);
	*key = strchr(*group, '.');
	*(key[0]) = '\0';
	++*key;
}

static void
set_boolean(MqConfig *config, const gchar *name, gboolean value)
{
	gchar *group;
	gchar *key;

	split_name(name, &group, &key);

	g_key_file_set_boolean(config->key_file, group, name, value);

	if (!config->types_and_cbs_set) {
		g_hash_table_insert(config->types_and_cbs, g_strdup(name),
			TYPE_BOOLEAN);
	}
}

static void
set_defaults(MqConfig *config)
{
	config->types_and_cbs_set = FALSE;


	config->types_and_cbs_set = TRUE;
}

MqConfig *
mq_config_new(const gchar *profile)
{
	MqConfig *config;

	config = malloc(sizeof(*config));

	config->file_name = g_strdup_printf("%s/%s/config",
		g_get_user_config_dir(), profile);
	config->key_file = g_key_file_new();
	config->types_and_cbs = g_hash_table_new(g_str_hash, g_int_equal);
	set_defaults(config);

	return config;
}

gboolean
mq_config_load(MqConfig *config)
{
	/* TODO: Handle parsing and ENOENT errors differently? */
	return g_key_file_load_from_file(config->key_file, config->file_name,
		G_KEY_FILE_KEEP_COMMENTS | G_KEY_FILE_KEEP_TRANSLATIONS, NULL);
}

gboolean
mq_config_save(MqConfig *config)
{
	/* TODO: Handle GFileError? */
	return g_key_file_save_to_file(config->key_file, config->file_name,
		NULL);
}

void
mq_config_set(MqConfig *config, const gchar *name, const gchar *value)
{
	ConfigItem *item;

	item = g_hash_table_lookup(config->types_and_cbs, name);
	g_assert(item);

	switch (item->type) {
		case TYPE_BOOLEAN:
			/* value is "on" or "off" (as implemented in
			 * mq_html_input_checkbox()). */
			set_boolean(config, name, value[1] == 'n' ? TRUE :
				FALSE);
			break;
	}
}