/* Reflow Oven Controller
 *
 * Copyright (C) 2020  Mario Hüttel <mario.huettel@gmx.net>
 *
 * This file is part of the Reflow Oven Controller Project.
 *
 * The reflow oven controller is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * The Reflow Oven Control Firmware 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 the reflow oven controller project.
 * If not, see <http://www.gnu.org/licenses/>.
 */

/**
 * @addtogroup config-parser
 * @{
 */

#include <config-parser/config-parser.h>
#include <string.h>
#include <stdio.h>

#define CONFIG_PARSER_MAGIC 0x464a6e2bUL
#define CONFIG_PARSER(p) ((struct config_parser *)(p))

#define config_parser_check_handle(handle) do { if (!(handle) || \
						((struct config_parser *)(handle))->magic != CONFIG_PARSER_MAGIC) \
							return CONFIG_PARSER_PARAM_ERR; \
						} while (0)

config_parser_handle_t config_parser_open_file(struct config_parser *config_parser, bool write, const char *file_name,
					       char *working_buffer)
{
	FRESULT res;

	if (!config_parser || !file_name || !working_buffer)
		return NULL;

	config_parser->magic = CONFIG_PARSER_MAGIC;
	config_parser->write = write;
	config_parser->buffer = working_buffer;

	res = f_open(&config_parser->file, file_name, (write ? FA_CREATE_ALWAYS | FA_WRITE : FA_READ));
	if (res != FR_OK)
		return NULL;

	return (config_parser_handle_t)config_parser;
}

enum config_parser_ret config_parser_get_line(config_parser_handle_t handle, struct config_parser_entry *entry)
{
	(void)entry;
	config_parser_check_handle(handle);

	return CONFIG_PARSER_OK;
}

enum config_parser_ret config_parser_reset_to_start(config_parser_handle_t handle)
{
	FRESULT res;
	struct config_parser *p;
	config_parser_check_handle(handle);
	p = CONFIG_PARSER(handle);

	res = f_rewind(&p->file);
	if (res != FR_OK)
		return CONFIG_PARSER_IOERR;

	return CONFIG_PARSER_OK;
}

enum config_parser_ret config_parser_write_entry(config_parser_handle_t handle, const struct config_parser_entry *entry)
{
	(void)entry;
	config_parser_check_handle(handle);

	return CONFIG_PARSER_OK;
}

enum config_parser_ret config_parser_close_file(config_parser_handle_t handle)
{
	struct config_parser *p;
	FRESULT res;
	config_parser_check_handle(handle);
	p = CONFIG_PARSER(handle);

	res = f_close(&p->file);

	return (res == FR_OK ? CONFIG_PARSER_OK : CONFIG_PARSER_IOERR);
}

/** @} */