/*
 * Copyright (c) 2017 Linaro Limited
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#ifndef __LWM2M_H__
#define __LWM2M_H__

#include <net/net_context.h>

/* LWM2M Objects defined by OMA */

#define LWM2M_OBJECT_SECURITY_ID			0
#define LWM2M_OBJECT_SERVER_ID				1
#define LWM2M_OBJECT_ACCESS_CONTROL_ID			2
#define LWM2M_OBJECT_DEVICE_ID				3
#define LWM2M_OBJECT_CONNECTIVITY_MONITORING_ID		4
#define LWM2M_OBJECT_FIRMWARE_ID			5
#define LWM2M_OBJECT_LOCATION_ID			6
#define LWM2M_OBJECT_CONNECTIVITY_STATISTICS_ID		7

/* IPSO Alliance Objects */

#define IPSO_OBJECT_TEMP_SENSOR_ID			3303
#define IPSO_OBJECT_LIGHT_CONTROL_ID			3311

/**
 * LwM2M context structure
 *
 * @details Context structure for the LwM2M high-level API.
 */
struct lwm2m_ctx {
	/** Net context structure */
	struct net_context *net_ctx;
};

/* callback can return 1 if handled (don't update value) */
typedef void *(*lwm2m_engine_get_data_cb_t)(u16_t obj_inst_id,
				       size_t *data_len);
typedef int (*lwm2m_engine_set_data_cb_t)(u16_t obj_inst_id,
				       u8_t *data, u16_t data_len,
				       bool last_block, size_t total_size);
typedef int (*lwm2m_engine_exec_cb_t)(u16_t obj_inst_id);


/* LWM2M Device Object */

#define LWM2M_DEVICE_PWR_SRC_TYPE_DC_POWER	0
#define LWM2M_DEVICE_PWR_SRC_TYPE_BAT_INT	1
#define LWM2M_DEVICE_PWR_SRC_TYPE_BAT_EXT	2
#define LWM2M_DEVICE_PWR_SRC_TYPE_UNUSED	3
#define LWM2M_DEVICE_PWR_SRC_TYPE_PWR_OVER_ETH	4
#define LWM2M_DEVICE_PWR_SRC_TYPE_USB		5
#define LWM2M_DEVICE_PWR_SRC_TYPE_AC_POWER	6
#define LWM2M_DEVICE_PWR_SRC_TYPE_SOLAR		7
#define LWM2M_DEVICE_PWR_SRC_TYPE_MAX		8

#define LWM2M_DEVICE_ERROR_NONE			0
#define LWM2M_DEVICE_ERROR_LOW_POWER		1
#define LWM2M_DEVICE_ERROR_EXT_POWER_SUPPLY_OFF	2
#define LWM2M_DEVICE_ERROR_GPS_FAILURE		3
#define LWM2M_DEVICE_ERROR_LOW_SIGNAL_STRENGTH	4
#define LWM2M_DEVICE_ERROR_OUT_OF_MEMORY	5
#define LWM2M_DEVICE_ERROR_SMS_FAILURE		6
#define LWM2M_DEVICE_ERROR_NETWORK_FAILURE	7
#define LWM2M_DEVICE_ERROR_PERIPHERAL_FAILURE	8

#define LWM2M_DEVICE_BATTERY_STATUS_NORMAL	0
#define LWM2M_DEVICE_BATTERY_STATUS_CHARGING	1
#define LWM2M_DEVICE_BATTERY_STATUS_CHARGE_COMP	2
#define LWM2M_DEVICE_BATTERY_STATUS_DAMAGED	3
#define LWM2M_DEVICE_BATTERY_STATUS_LOW		4
#define LWM2M_DEVICE_BATTERY_STATUS_NOT_INST	5
#define LWM2M_DEVICE_BATTERY_STATUS_UNKNOWN	6

int lwm2m_device_add_pwrsrc(u8_t pwr_src_type); /* returns index */
int lwm2m_device_remove_pwrsrc(int index);
int lwm2m_device_set_pwrsrc_voltage_mv(int index, int voltage_mv);
int lwm2m_device_set_pwrsrc_current_ma(int index, int current_ma);
int lwm2m_device_add_err(u8_t error_code);


/* LWM2M Firemware Update Object */

#define STATE_IDLE		0
#define STATE_DOWNLOADING	1
#define STATE_DOWNLOADED	2
#define STATE_UPDATING		3

#define RESULT_DEFAULT		0
#define RESULT_SUCCESS		1
#define RESULT_NO_STORAGE	2
#define RESULT_OUT_OF_MEM	3
#define RESULT_CONNECTION_LOST	4
#define RESULT_INTEGRITY_FAILED	5
#define RESULT_UNSUP_FW		6
#define RESULT_INVALID_URI	7
#define RESULT_UPDATE_FAILED	8
#define RESULT_UNSUP_PROTO	9

void lwm2m_firmware_set_write_cb(lwm2m_engine_set_data_cb_t cb);
lwm2m_engine_set_data_cb_t lwm2m_firmware_get_write_cb(void);


/* LWM2M Engine */

/*
 * float type below use the following logic:
 * val1 is the whole number portion of decimal
 * val2 is the decimal portion *1000000 for 32bit, *1000000000 for 64bit
 * Example: 123.456 == val1: 123, val2:456000
 * Example: 123.000456 = val1: 123, val2:456
 */
typedef struct float32_value {
	s32_t val1;
	s32_t val2;
} float32_value_t;

typedef struct float64_value {
	s64_t val1;
	s64_t val2;
} float64_value_t;

int lwm2m_engine_create_obj_inst(char *pathstr);

int lwm2m_engine_set_string(char *path, char *data_ptr);
int lwm2m_engine_set_u8(char *path, u8_t value);
int lwm2m_engine_set_u16(char *path, u16_t value);
int lwm2m_engine_set_u32(char *path, u32_t value);
int lwm2m_engine_set_u64(char *path, u64_t value);
int lwm2m_engine_set_s8(char *path, s8_t value);
int lwm2m_engine_set_s16(char *path, s16_t value);
int lwm2m_engine_set_s32(char *path, s32_t value);
int lwm2m_engine_set_s64(char *path, s64_t value);
int lwm2m_engine_set_bool(char *path, bool value);
int lwm2m_engine_set_float32(char *pathstr, float32_value_t *value);
int lwm2m_engine_set_float64(char *pathstr, float64_value_t *value);

int lwm2m_engine_get_string(char *path, void *str, u16_t strlen);
u8_t  lwm2m_engine_get_u8(char *path);
u16_t lwm2m_engine_get_u16(char *path);
u32_t lwm2m_engine_get_u32(char *path);
u64_t lwm2m_engine_get_u64(char *path);
s8_t  lwm2m_engine_get_s8(char *path);
s16_t lwm2m_engine_get_s16(char *path);
s32_t lwm2m_engine_get_s32(char *path);
s64_t lwm2m_engine_get_s64(char *path);
bool  lwm2m_engine_get_bool(char *path);
int   lwm2m_engine_get_float32(char *pathstr, float32_value_t *buf);
int   lwm2m_engine_get_float64(char *pathstr, float64_value_t *buf);

int lwm2m_engine_register_read_callback(char *path,
					lwm2m_engine_get_data_cb_t cb);
int lwm2m_engine_register_pre_write_callback(char *path,
					     lwm2m_engine_get_data_cb_t cb);
int lwm2m_engine_register_post_write_callback(char *path,
					      lwm2m_engine_set_data_cb_t cb);
int lwm2m_engine_register_exec_callback(char *path,
					lwm2m_engine_exec_cb_t cb);

int lwm2m_engine_start(struct lwm2m_ctx *client_ctx);

/* LWM2M RD Client */

int lwm2m_rd_client_start(struct lwm2m_ctx *client_ctx,
			  struct sockaddr *peer_addr,
			  const char *ep_name);

#endif	/* __LWM2M_H__ */