/* 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/>.
*/

/**
 * @addtogroup temp-profile
 * @{
 */

#ifndef __TEMP_PROFILE_EXECUTER_H__
#define __TEMP_PROFILE_EXECUTER_H__

#include <stdint.h>
#include <reflow-controller/temp-profile/temp-profile-parser.h>

/**
 * @brief Maximum command count of a temperature profile the parser will handle
 */
#define MAX_PROFILE_LENGTH 64

/**
 * @brief Status of the temperature profile execution
 */
enum tpe_status {
	TPE_OFF, /**< @brief No profile execution */
	TPE_RUNNING, /**< @brief Profile currently running */
	TPE_ABORT, /**< @brief Profile execution aborted due to event / error */
};

/**
 * @brief The current execution state of the temperature profile
 */
struct tpe_current_state {
	enum tpe_status status; /**< @brief Execution status */
	float setpoint; /**< @brief Temperature setpoint in degrees Celsius */
	uint64_t start_timestamp; /**< @brief The millisicend tick timestamp, the profile execution was started */
	uint32_t step; /**< @brief Current execution step. Starts at 0 */
	uint32_t profile_steps; /**< @brief Number of steps (commands) in profile */
	enum pl_command_type current_command; /**< @brief The currently executed command */
};

/**
 * @brief Start a temperature profile execution from a file on SD card.
 * @param filename Filename of the temperature profile
 * @return Status. PL_RET_SUCCESS id profile was parsed and started successfully
 */
enum pl_ret_val temp_profile_executer_start(const char *filename);

/**
 * @brief Handle the profile execution
 *
 * The function checks if since the last time it ran, 100 ms have passed. If yes,
 * it proceeds with the command execution.
 *
 * @note This must be periodically called.
 * @return  0 if successul, negative if profile not running or aborted or temperature set and PID not configured.
 */
int temp_profile_executer_handle(void);

/**
 * @brief Get the curretn execution state of the temperature profile executer
 * @warning The returned state structure is static and used internally. You must not modify it.
 * @return Execution state
 */
const struct tpe_current_state *temp_profile_executer_status(void);

/**
 * @brief Stop the temperature profile execution.
 *
 * The profile execution is stopped and the beeper is deactivated.
 *
 * @return always 0. This function cannot fail.
 */
int temp_profile_executer_stop(void);

#endif /* __TEMP_PROFILE_EXECUTER_H__ */

/** @} */