#pragma once
#include <stdint.h>

#define CABIN_PACKET_MAGIC 0xCA
#define CABIN_CMD_MAGIC    0xCB

// Command IDs
#define CMD_VARME   0x01
#define CMD_VVB     0x02   // varmtvannsbereder

// Wire format: 13 bytes total
// At SF12 BW125: ~1.3s airtime
// flags bits: 0=varme, 1=vvb (1=on, 0=off)
#define CABIN_FLAG_VARME  (1 << 0)
#define CABIN_FLAG_VVB    (1 << 1)

struct __attribute__((packed)) CabinPacket {
  uint8_t  magic;         // = CABIN_PACKET_MAGIC
  uint8_t  seq;           // rolling counter
  int16_t  temp_in_x10;   // indoor temp * 10  (213 = 21.3 °C), INT16_MIN = no data
  int16_t  temp_out_x10;  // outdoor temp * 10, INT16_MIN = no data
  uint16_t batt_mv;       // battery voltage mV (12V system: ~10000–14400)
  uint8_t  batt_pct;      // SOC 0–100, 0xFF = no data
  uint8_t  flags;         // switch states: bit0=varme, bit1=vvb
  uint32_t sig;           // truncated HMAC-SHA256
};

// Command packet: home → gateway → node → ESPHome switch
// 8 bytes total
struct __attribute__((packed)) CabinCmdPacket {
  uint8_t  magic;   // = CABIN_CMD_MAGIC
  uint8_t  seq;
  uint8_t  cmd_id;  // CMD_VARME, CMD_VVB, ...
  uint8_t  value;   // 0 = off, 1 = on
  uint32_t sig;
};