/** @file
 * @brief HL7800 modem public API header file.
 *
 * Allows an application to control the HL7800 modem.
 *
 * Copyright (c) 2020 Laird Connectivity
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#ifndef ZEPHYR_INCLUDE_DRIVERS_MODEM_HL7800_H_
#define ZEPHYR_INCLUDE_DRIVERS_MODEM_HL7800_H_

#ifdef __cplusplus
extern "C" {
#endif

#include <zephyr/types.h>

#include <time.h>

/* The size includes the NUL character, the strlen doesn't */
#define MDM_HL7800_REVISION_MAX_SIZE 29
#define MDM_HL7800_REVISION_MAX_STRLEN (MDM_HL7800_REVISION_MAX_SIZE - 1)

#define MDM_HL7800_IMEI_SIZE 16
#define MDM_HL7800_IMEI_STRLEN (MDM_HL7800_IMEI_SIZE - 1)

#define MDM_HL7800_ICCID_MAX_SIZE 21
#define MDM_HL7800_ICCID_MAX_STRLEN (MDM_HL7800_ICCID_MAX_SIZE - 1)

#define MDM_HL7800_SERIAL_NUMBER_SIZE 15
#define MDM_HL7800_SERIAL_NUMBER_STRLEN (MDM_HL7800_SERIAL_NUMBER_SIZE - 1)

#define MDM_HL7800_APN_MAX_SIZE 64
#define MDM_HL7800_APN_USERNAME_MAX_SIZE 65
#define MDM_HL7800_APN_PASSWORD_MAX_SIZE 65

#define MDM_HL7800_APN_MAX_STRLEN (MDM_HL7800_APN_MAX_SIZE - 1)
#define MDM_HL7800_APN_USERNAME_MAX_STRLEN                                     \
	(MDM_HL7800_APN_USERNAME_MAX_SIZE - 1)
#define MDM_HL7800_APN_PASSWORD_MAX_STRLEN                                     \
	(MDM_HL7800_APN_PASSWORD_MAX_SIZE - 1)

#define MDM_HL7800_APN_CMD_MAX_SIZE                                            \
	(32 + MDM_HL7800_APN_USERNAME_MAX_STRLEN +                             \
	 MDM_HL7800_APN_PASSWORD_MAX_STRLEN)

#define MDM_HL7800_APN_CMD_MAX_STRLEN (MDM_HL7800_APN_CMD_MAX_SIZE - 1)

struct mdm_hl7800_apn {
	char value[MDM_HL7800_APN_MAX_SIZE];
	char username[MDM_HL7800_APN_USERNAME_MAX_SIZE];
	char password[MDM_HL7800_APN_PASSWORD_MAX_SIZE];
};

#define MDM_HL7800_LTE_BAND_STR_SIZE 21
#define MDM_HL7800_LTE_BAND_STRLEN (MDM_HL7800_LTE_BAND_STR_SIZE - 1)

#define MDM_HL7800_OPERATOR_INDEX_SIZE 3
#define MDM_HL7800_OPERATOR_INDEX_STRLEN (MDM_HL7800_OPERATOR_INDEX_SIZE - 1)

#define MDM_HL7800_IMSI_MIN_STR_SIZE 15
#define MDM_HL7800_IMSI_MAX_STR_SIZE 16
#define MDM_HL7800_IMSI_MAX_STRLEN (MDM_HL7800_IMSI_MAX_STR_SIZE - 1)

#define MDM_HL7800_MODEM_FUNCTIONALITY_SIZE 2
#define MDM_HL7800_MODEM_FUNCTIONALITY_STRLEN                                  \
	(MDM_HL7800_MODEM_FUNCTIONALITY_SIZE - 1)

#define MDM_HL7800_MAX_GPS_STR_SIZE 33

#define MDM_HL7800_MAX_POLTE_USER_ID_SIZE 16
#define MDM_HL7800_MAX_POLTE_PASSWORD_SIZE 16
#define MDM_HL7800_MAX_POLTE_LOCATION_STR_SIZE 33

/* Assign the server error code (location response) to a value
 * that isn't used by locate response so that a single status
 * callback can be used.
 */
#define MDM_HL7800_POLTE_SERVER_ERROR 10

#define MDM_HL7800_SET_POLTE_USER_AND_PASSWORD_FMT_STR "AT%%POLTECMD=\"SERVERAUTH\",\"%s\",\"%s\""

struct mdm_hl7800_site_survey {
	uint32_t earfcn; /* EUTRA Absolute Radio Frequency Channel Number */
	uint32_t cell_id;
	int rsrp;
	int rsrq;
};

enum mdm_hl7800_radio_mode { MDM_RAT_CAT_M1 = 0, MDM_RAT_CAT_NB1 };

enum mdm_hl7800_event {
	HL7800_EVENT_RESERVED = 0,
	HL7800_EVENT_NETWORK_STATE_CHANGE,
	HL7800_EVENT_APN_UPDATE,
	HL7800_EVENT_RSSI,
	HL7800_EVENT_SINR,
	HL7800_EVENT_STARTUP_STATE_CHANGE,
	HL7800_EVENT_SLEEP_STATE_CHANGE,
	HL7800_EVENT_RAT,
	HL7800_EVENT_BANDS,
	HL7800_EVENT_ACTIVE_BANDS,
	HL7800_EVENT_FOTA_STATE,
	HL7800_EVENT_FOTA_COUNT,
	HL7800_EVENT_REVISION,
	HL7800_EVENT_GPS,
	HL7800_EVENT_GPS_POSITION_STATUS,
	HL7800_EVENT_POLTE_REGISTRATION,
	HL7800_EVENT_POLTE_LOCATE_STATUS,
	HL7800_EVENT_POLTE,
	HL7800_EVENT_SITE_SURVEY,
};

enum mdm_hl7800_startup_state {
	HL7800_STARTUP_STATE_READY = 0,
	HL7800_STARTUP_STATE_WAITING_FOR_ACCESS_CODE,
	HL7800_STARTUP_STATE_SIM_NOT_PRESENT,
	HL7800_STARTUP_STATE_SIMLOCK,
	HL7800_STARTUP_STATE_UNRECOVERABLE_ERROR,
	HL7800_STARTUP_STATE_UNKNOWN,
	HL7800_STARTUP_STATE_INACTIVE_SIM
};

enum mdm_hl7800_network_state {
	HL7800_NOT_REGISTERED = 0,
	HL7800_HOME_NETWORK,
	HL7800_SEARCHING,
	HL7800_REGISTRATION_DENIED,
	HL7800_OUT_OF_COVERAGE,
	HL7800_ROAMING,
	HL7800_EMERGENCY = 8,
	/* Laird defined states */
	HL7800_UNABLE_TO_CONFIGURE = 0xf0
};

enum mdm_hl7800_sleep {
	HL7800_SLEEP_UNINITIALIZED = 0,
	HL7800_SLEEP_HIBERNATE,
	HL7800_SLEEP_AWAKE,
	HL7800_SLEEP_LITE_HIBERNATE,
	HL7800_SLEEP_SLEEP,
};

enum mdm_hl7800_fota_state {
	HL7800_FOTA_IDLE,
	HL7800_FOTA_START,
	HL7800_FOTA_WIP,
	HL7800_FOTA_PAD,
	HL7800_FOTA_SEND_EOT,
	HL7800_FOTA_FILE_ERROR,
	HL7800_FOTA_INSTALL,
	HL7800_FOTA_REBOOT_AND_RECONFIGURE,
	HL7800_FOTA_COMPLETE,
};

enum mdm_hl7800_functionality {
	HL7800_FUNCTIONALITY_MINIMUM = 0,
	HL7800_FUNCTIONALITY_FULL = 1,
	HL7800_FUNCTIONALITY_AIRPLANE = 4
};

/* The modem reports state values as an enumeration and a string.
 * GPS values are reported with a type of value and string.
 */
struct mdm_hl7800_compound_event {
	uint8_t code;
	char *string;
};

enum mdm_hl7800_gnss_event {
	HL7800_GNSS_EVENT_INVALID = -1,
	HL7800_GNSS_EVENT_INIT,
	HL7800_GNSS_EVENT_START,
	HL7800_GNSS_EVENT_STOP,
	HL7800_GNSS_EVENT_POSITION,
};

enum mdm_hl7800_gnss_status {
	HL7800_GNSS_STATUS_INVALID = -1,
	HL7800_GNSS_STATUS_FAILURE,
	HL7800_GNSS_STATUS_SUCCESS,
};

enum mdm_hl7800_gnss_position_event {
	HL7800_GNSS_POSITION_EVENT_INVALID = -1,
	HL7800_GNSS_POSITION_EVENT_LOST_OR_NOT_AVAILABLE_YET,
	HL7800_GNSS_POSITION_EVENT_PREDICTION_AVAILABLE,
	HL7800_GNSS_POSITION_EVENT_2D_AVAILABLE,
	HL7800_GNSS_POSITION_EVENT_3D_AVAILABLE,
	HL7800_GNSS_POSITION_EVENT_FIXED_TO_INVALID,
};

enum mdm_hl7800_gps_string_types {
	HL7800_GPS_STR_LATITUDE,
	HL7800_GPS_STR_LONGITUDE,
	HL7800_GPS_STR_GPS_TIME,
	HL7800_GPS_STR_FIX_TYPE,
	HL7800_GPS_STR_HEPE,
	HL7800_GPS_STR_ALTITUDE,
	HL7800_GPS_STR_ALT_UNC,
	HL7800_GPS_STR_DIRECTION,
	HL7800_GPS_STR_HOR_SPEED,
	HL7800_GPS_STR_VER_SPEED
};

/* status: negative errno, 0 on success
 * user and password aren't valid if status is non-zero.
 */
struct mdm_hl7800_polte_registration_event_data {
	int status;
	char *user;
	char *password;
};

/* status: negative errno, 0 on success, non-zero error code
 * Data is not valid if status is non-zero.
 */
struct mdm_hl7800_polte_location_data {
	uint32_t timestamp;
	int status;
	char latitude[MDM_HL7800_MAX_POLTE_LOCATION_STR_SIZE];
	char longitude[MDM_HL7800_MAX_POLTE_LOCATION_STR_SIZE];
	char confidence_in_meters[MDM_HL7800_MAX_POLTE_LOCATION_STR_SIZE];
};

/**
 * event - The type of event
 * event_data - Pointer to event specific data structure
 * HL7800_EVENT_NETWORK_STATE_CHANGE - compound event
 * HL7800_EVENT_APN_UPDATE - struct mdm_hl7800_apn
 * HL7800_EVENT_RSSI - int
 * HL7800_EVENT_SINR - int
 * HL7800_EVENT_STARTUP_STATE_CHANGE - compound event
 * HL7800_EVENT_SLEEP_STATE_CHANGE - compound event
 * HL7800_EVENT_RAT - int
 * HL7800_EVENT_BANDS - string
 * HL7800_EVENT_ACTIVE_BANDS - string
 * HL7800_EVENT_FOTA_STATE - compound event
 * HL7800_EVENT_FOTA_COUNT - uint32_t
 * HL7800_EVENT_REVISION - string
 * HL7800_EVENT_GPS - compound event
 * HL7800_EVENT_GPS_POSITION_STATUS int
 * HL7800_EVENT_POLTE_REGISTRATION mdm_hl7800_polte_registration_event_data
 * HL7800_EVENT_POLTE mdm_hl7800_polte_location_data
 * HL7800_EVENT_POLTE_LOCATE_STATUS int
 * HL7800_EVENT_SITE_SURVEY mdm_hl7800_site_survey
 */
typedef void (*mdm_hl7800_event_callback_t)(enum mdm_hl7800_event event,
					    void *event_data);

struct mdm_hl7800_callback_agent {
	sys_snode_t node;
	mdm_hl7800_event_callback_t event_callback;
};

/**
 * @brief Power off the HL7800
 *
 * @return int32_t 0 for success
 */
int32_t mdm_hl7800_power_off(void);

/**
 * @brief Reset the HL7800 (and allow it to reconfigure).
 *
 * @return int32_t 0 for success
 */
int32_t mdm_hl7800_reset(void);

/**
 * @brief Control the wake signals to the HL7800.
 * @note this API should only be used for debug purposes.
 *
 * @param awake True to keep the HL7800 awake, False to allow sleep
 */
void mdm_hl7800_wakeup(bool awake);

/**
 * @brief Send an AT command to the HL7800.
 * @note this API should only be used for debug purposes.
 *
 * @param data AT command string
 * @return int32_t 0 for success
 */
int32_t mdm_hl7800_send_at_cmd(const uint8_t *data);

/**
 * @brief Get the signal quality of the HL7800.
 * If CONFIG_MODEM_HL7800_RSSI_RATE_SECONDS is non-zero, then
 * this function returns the value from the last periodic read.
 * If CONFIG_MODEM_HL7800_RSSI_RATE_SECONDS is 0, then this
 * may cause the modem to be woken so that the values can be queried.
 *
 * @param rsrp Reference Signals Received Power (dBm)
 *             Range = -140 dBm to -44 dBm
 * @param sinr Signal to Interference plus Noise Ratio (dB)
 *             Range = -128 dB to 40 dB
 */
void mdm_hl7800_get_signal_quality(int *rsrp, int *sinr);

/**
 * @brief Get the SIM card ICCID
 *
 */
char *mdm_hl7800_get_iccid(void);

/**
 * @brief Get the HL7800 serial number
 *
 */
char *mdm_hl7800_get_sn(void);

/**
 * @brief Get the HL7800 IMEI
 *
 */
char *mdm_hl7800_get_imei(void);

/**
 * @brief Get the HL7800 firmware version
 *
 */
char *mdm_hl7800_get_fw_version(void);

/**
 * @brief Get the IMSI
 *
 */
char *mdm_hl7800_get_imsi(void);

/**
 * @brief Update the Access Point Name in the modem.
 *
 * @retval 0 on success, negative on failure.
 */
int32_t mdm_hl7800_update_apn(char *access_point_name);

/**
 * @brief Update the Radio Access Technology (mode).
 *
 * @retval 0 on success, negative on failure.
 */
int32_t mdm_hl7800_update_rat(enum mdm_hl7800_radio_mode value);

/**
 * @retval true if RAT value is valid
 */
bool mdm_hl7800_valid_rat(uint8_t value);

/**
 * @brief Register a function that is called when a modem event occurs.
 * Multiple users registering for callbacks is supported.
 *
 * @param agent event callback agent
 *
 * @retval 0 on success, negative on failure
 */
int mdm_hl7800_register_event_callback(struct mdm_hl7800_callback_agent *agent);

/**
 * @brief Unregister a callback event function
 *
 * @param agent event callback agent
 *
 * @retval 0 on success, negative on failure
 */
int mdm_hl7800_unregister_event_callback(struct mdm_hl7800_callback_agent *agent);

/**
 * @brief Force modem module to generate status events.
 *
 * @note This can be used to get the current state when a module initializes
 * later than the modem.
 */
void mdm_hl7800_generate_status_events(void);

/**
 * @brief Get the local time from the modem's real time clock.
 *
 * @param tm time structure
 * @param offset The amount the local time is offset from GMT/UTC in seconds.
 * @return int32_t 0 if successful
 */
int32_t mdm_hl7800_get_local_time(struct tm *tm, int32_t *offset);

#ifdef CONFIG_MODEM_HL7800_FW_UPDATE
/**
 * @brief Update the HL7800 via XMODEM protocol.  During the firmware update
 * no other modem fuctions will be available.
 *
 * @param file_path Absolute path of the update file
 *
 * @param 0 if successful
 */
int32_t mdm_hl7800_update_fw(char *file_path);
#endif

/**
 * @brief Read the operator index from the modem.
 *
 * @retval negative error code, 0 on success
 */
int32_t mdm_hl7800_get_operator_index(void);

/**
 * @brief Get modem functionality
 *
 * @return int32_t negative errno on failure, else mdm_hl7800_functionality
 */
int32_t mdm_hl7800_get_functionality(void);

/**
 * @brief Set airplane, normal, or reduced functionality mode.
 * Airplane mode persists when reset.
 *
 * @note Boot functionality is also controlled by Kconfig
 * MODEM_HL7800_BOOT_IN_AIRPLANE_MODE.
 *
 * @param mode
 * @return int32_t negative errno, 0 on success
 */
int32_t mdm_hl7800_set_functionality(enum mdm_hl7800_functionality mode);

/**
 * @brief When rate is non-zero: Put modem into Airplane mode. Enable GPS and
 * generate HL7800_EVENT_GPS events.
 * When zero: Disable GPS and put modem into normal mode.
 *
 * @note Airplane mode isn't cleared when the modem is reset.
 *
 * @param rate in seconds to query location
 * @return int32_t negative errno, 0 on success
 */
int32_t mdm_hl7800_set_gps_rate(uint32_t rate);

/**
 * @brief Register modem/SIM with polte.io
 *
 * @note It takes around 30 seconds for HL7800_EVENT_POLTE_REGISTRATION to
 * be generated.  If the applications saves the user and password
 * information into non-volatile memory, then this command
 * only needs to be run once.
 *
 * @return int32_t negative errno, 0 on success
 */
int32_t mdm_hl7800_polte_register(void);

/**
 * @brief Enable PoLTE.
 *
 * @param user from polte.io or register command callback
 * @param password from polte.io register command callback
 * @return int32_t negative errno, 0 on success
 */
int32_t mdm_hl7800_polte_enable(char *user, char *password);

/**
 * @brief Locate device using PoLTE.
 *
 * @note The first HL7800_EVENT_POLTE_LOCATE_STATUS event indicates
 * the status of issuing the locate command. The second event
 * requires 20-120 seconds to be generated and it contains the
 * location information (or indicates server failure).
 *
 * @return int32_t negative errno, 0 on success
 */
int32_t mdm_hl7800_polte_locate(void);

/**
 * @brief Perform a site survey.  This command may return different values
 * each time it is run (depending on what is in range).
 *
 * HL7800_EVENT_SITE_SURVEY is generated for each response received from modem.
 *
 * @retval negative error code, 0 on success
 */
int32_t mdm_hl7800_perform_site_survey(void);

/**
 * @brief Set desired sleep level. Requires MODEM_HL7800_LOW_POWER_MODE
 *
 * @param level (sleep, lite hibernate, or hibernate)
 * @return int negative errno, 0 on success
 */
int mdm_hl7800_set_desired_sleep_level(enum mdm_hl7800_sleep level);

/**
 * @brief Allows mapping of WAKE_UP signal
 * to a user accessible test point on the development board.
 *
 * @param func to be called when application requests modem wake/sleep.
 * The state parameter of the callback is 1 when modem should stay awake,
 * 0 when modem can sleep
 */
void mdm_hl7800_register_wake_test_point_callback(void (*func)(int state));

/**
 * @brief Allows mapping of P1.12_GPIO6 signal
 * to a user accessible test point on the development board.
 *
 * @param func to be called when modem wakes/sleeps is sleep level is
 * hibernate or lite hibernate.
 * The state parameter of the callback follows gpio_pin_get definitions,
 * but will default high if there is an error reading pin
 */
void mdm_hl7800_register_gpio6_callback(void (*func)(int state));

/**
 * @brief Allows mapping of UART1_CTS signal
 * to a user accessible test point on the development board.
 *
 * @param func to be called when CTS state changes if sleep level is sleep.
 * The state parameter of the callback follows gpio_pin_get definitions,
 * but will default low if there is an error reading pin
 */
void mdm_hl7800_register_cts_callback(void (*func)(int state));

/**
 * @brief Set the bands available for the LTE connection.
 * NOTE: This will cause the modem to reboot. This call returns before the reboot.
 *
 * @param bands Band bitmap in hexadecimal format without the 0x prefix.
 * Leading 0's for the value can be ommited.
 *
 * @return int32_t negative errno, 0 on success
 */
int32_t mdm_hl7800_set_bands(const char *bands);

/**
 * @brief Set the log level for the modem.
 *
 * @note It cannot be set higher than CONFIG_MODEM_LOG_LEVEL.
 * If debug level is desired, then it must be compiled with that level.
 *
 * @param level 0 (None) - 4 (Debug)
 *
 * @retval new log level
 */
uint32_t mdm_hl7800_log_filter_set(uint32_t level);

#ifdef __cplusplus
}
#endif

#endif /* ZEPHYR_INCLUDE_DRIVERS_MODEM_HL7800_H_ */