#ifndef APP_H
#define APP_H

#include <stdint.h>
#include <Arduino.h>

#define SENSOR_NAME_LEN 10

enum sm_cmd_code {
  SM_CMD_GET_SENSOR_COUNT  = 1,
  SM_CMD_GET_VALUE         = 2,
  SM_CMD_SET_WARNING_VALUE = 3,
  SM_CMD_GET_WARNING_VALUE = 4,
  SM_CMD_SET_SENSOR_NAME   = 5,
  SM_CMD_GET_SENSOR_NAME   = 6,
  SM_CMD_FAIL              = 255,
};

struct sm_get_sensor_count_req {
};

struct sm_get_sensor_count_res {
  uint8_t count;
};

struct sm_get_value_req {
  uint8_t sensor;
};

struct sm_get_value_res {
  uint8_t value;
};

struct sm_set_warning_value_req {
  uint8_t sensor;
  uint16_t warning_value;
};

struct sm_set_warning_value_res {
};

struct sm_get_warning_value_req {
  uint8_t sensor;
};

struct sm_get_warning_value_res {
  uint16_t warning_value;
};

struct sm_set_sensor_name_req {
  uint8_t sensor;
  uint8_t length;
  uint8_t name[SENSOR_NAME_LEN];
};

struct sm_set_sensor_name_res {
};

struct sm_get_sensor_name_req {
  uint8_t sensor;
};

struct sm_get_sensor_name_res {
  uint8_t length;
  uint8_t name[SENSOR_NAME_LEN];
};

struct sm_req {
  uint8_t code;
  union {
    struct sm_get_sensor_count_req  get_sensor_count;
    struct sm_get_value_req         get_value;
    struct sm_set_warning_value_req set_warning_value;
    struct sm_get_warning_value_req get_warning_value;
    struct sm_set_sensor_name_req   set_sensor_name;
    struct sm_get_sensor_name_req   get_sensor_name;
  };
};

// len + code
#define SM_RES_HEADER_SIZE 1

struct sm_res {
  // header
  uint8_t code;
  
  // body
  union {
    struct sm_get_sensor_count_res  get_sensor_count;
    struct sm_get_value_res         get_value;
    struct sm_set_warning_value_res set_warning_value;
    struct sm_get_warning_value_res get_warning_value;
    struct sm_set_sensor_name_res   set_sensor_name;
    struct sm_get_sensor_name_res   get_sensor_name;
  };
};

void on_loop();

//boolean tx_soil_moisture(struct sm_res& res);
void notify_soil_moisture(const struct sm_res& res, uint8_t body_len);
void notify_battery_level(uint8_t value);

void on_soil_moisture_ctrl(uint8_t *data, uint8_t len);

#ifndef SM_DEBUG
#define SM_DEBUG 1
#endif

#if SM_DEBUG == 1
void write_req(struct sm_req const& req);
void write_res(struct sm_res const& res);
#endif

#endif