#include <Arduino.h>
#include "lora_util.h"

/*
* 32 digit length, character 0-9, a-f, A-F only, representing eight (16) hexadecimal numbers.
*/
uint8_t encrypt_key[16] = {0xfa, 0x11, 0x12, 0x56, 0x44, 0x18, 0x46, 0x30, 0xa8, 0x13, 0xdb, 0x05, 0xf5, 0x52, 0x39, 0xc4};

void send_cb(void) {
  Serial.println("Sent Sucessfully");
}

void encode_payload(float temperature, float humidity, uint8_t *payload) {
  // Scale and clamp temperature to the range -40.00 to +125.00
  int16_t temp_scaled = (int16_t)((temperature + 40.0) * 100);

  // Scale and clamp humidity to the range 0.00% to 100.00%
  uint8_t hum_scaled = (uint8_t)(humidity * 2.55);  // 255/100 for 1-byte representation

  // Populate the payload
  payload[0] = (temp_scaled >> 8) & 0xFF;  // Temperature high byte
  payload[1] = temp_scaled & 0xFF;         // Temperature low byte
  payload[2] = hum_scaled;                 // Humidity byte
}

void init_lora() {
  api.system.restoreDefault();
  api.lora.nwm.set();
  api.lora.pfreq.set(LORA_BAND);
  api.lora.psf.set(LORA_SF);
  api.lora.pbw.set(LORA_BANDWIDTH);
  api.lora.pcr.set(LORA_CODING_RATE);
  api.lora.ppl.set(LORA_PREAMBLE_LENGTH);
  api.lora.ptp.set(LORA_TX_POWER);
#ifdef ENABLE_ENCRYPTION
  api.lora.encry.set(1);
  api.lora.enckey.set(encrypt_key, sizeof(encrypt_key));
#endif
  api.lora.registerPSendCallback(send_cb);
}