/* Reflow Oven Controller
*
* Copyright (C) 2021  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/>.
*/

/**
 * @defgroup temp-profile Temperature Profile Parser and Executer
 * @{
 */

#ifndef __CONFIG_PARSER_TEMP_PROFILE_PARSER_H__
#define __CONFIG_PARSER_TEMP_PROFILE_PARSER_H__

#include <stdint.h>
#include <linklist-lib/singly-linked-list.h>

/**
 * @brief Command types the temperature profile language supports
 */
enum pl_command_type {
	PL_PID_CONF = 0, /**< @brief Configure the PID parameters and start PID controller */
	PL_SET_TEMP, /**< @brief Set the target temperature of the PID controller */
	PL_SET_RAMP, /**< @brief Perform a temperature ramp */
	PL_WAIT_FOR_TEMP, /**< @brief Wait until a temperature is reached */
	PL_WAIT_FOR_TIME, /**< @brief Wait for a specific amount of time */
	PL_LOUDSPEAKER_SET, /**< @brief Set the loudspeaker/beeper */
	PL_OFF, /**< @brief Disable the temperature output and shutdown the PID controller */
	PL_CLEAR_FLAGS, /**< @brief Try clear all flags */
	PL_DIGIO_CONF, /**< @brief Configure a DIGIO pin */
	PL_DIGIO_SET, /**< @brief Set a DIGIO pin */
	PL_DIGIO_WAIT, /**< @brief Wait until a DIGIO pin is set to the specified level */
	_PL_NUM_CMDS, /**< @brief Sentinel to determine the total amount of commands */
};

/**
 * @brief Profile language parser return value
 */
enum pl_ret_val {
	PL_RET_SUCCESS = 0, /**< @brief Profile parsed successfully */
	PL_RET_DISK_ERR, /**< @brief Disk I/O error */
	PL_RET_PARAM_ERR, /**< @brief Function parameter error */
	PL_RET_LIST_FULL, /**< @brief Command list is full. Temperature profile is longer than the specified maximum */
	PL_RET_SCRIPT_ERR, /**< @brief Syntax error in temperature profile */
};

/**
 * @brief Maximum parameter count of a command.
 */
#define PROFILE_LANG_MAX_NUM_ARGS (8)

/**
 * @brief Structure representing a command in a temperature profile.
 */
struct pl_command {
	enum pl_command_type cmd; /**< @brief Command */
	float params[PROFILE_LANG_MAX_NUM_ARGS]; /**< @brief Parameters */
};

/**
 * @brief Parse a temperature profile from file and generate the command list
 *
 * Commands are parsed into the list given by \p command_list. If \p max_len is reached,
 * the function returns with @ref PL_RET_LIST_FULL
 *
 * In any case, the command list not cleared afterwards. The user has to clear the command list manually
 * using @ref temp_profile_free_command_list.
 *
 * @param filename File to parse
 * @param[in, out] command_list Command list to output @ref pl_command elements in.
 * @param max_len maximum number of commands.
 * @param cmds_parsed Number of parsed commands
 * @return
 */
enum pl_ret_val temp_profile_parse_from_file(const char *filename,
					     SlList **command_list,
					     uint32_t max_len,
					     uint32_t *cmds_parsed);

/**
 * @brief Fully free a comamnd list including hte stored command structures.
 *
 * \p list's destination is set to NULL to indicate the empty list.
 *
 * @param[in, out] list Pointer to list.
 */
void temp_profile_free_command_list(SlList **list);

#endif /* __CONFIG_PARSER_TEMP_PROFILE_PARSER_H__ */

/** @} */