// Décodeur LoRaWAN officiel : D2x-LB - Outdoor Temperature Sensor (Dragino)
// Source : https://github.com/TheThingsNetwork/lorawan-devices/blob/master/vendor/dragino/d2x-lb.js
// The Things Network Device Repository, fichier publié par le constructeur, distribué sans modification.
// Format : decodeUplink(input) (TTN v3 / ChirpStack v4). Hébergé par smartbuildings.fr.

function decodeUplink(input) {
  var port = input.fPort;
  var bytes = input.bytes;
  var mode = (bytes[6] & 0x7c) >> 2;
  var data = {};
  switch (input.fPort) {
    case 2:
      if (mode == '3') {
        data.Work_mode = 'DS18B20';
        data.BatV = ((bytes[0] << 8) | bytes[1]) / 1000;
        data.ALARM_status = bytes[6] & 0x01 ? 'TRUE' : 'FALSE';

        if (bytes[2] == 0xff && bytes[3] == 0xff) {
          data.Temp_C1 = 'NULL';
        } else {
          data.Temp_C1 = parseFloat(((((bytes[2] << 24) >> 16) | bytes[3]) / 10).toFixed(1));
        }

        if (bytes[7] == 0xff && bytes[8] == 0xff) {
          data.Temp_C2 = 'NULL';
        } else {
          data.Temp_C2 = parseFloat(((((bytes[7] << 24) >> 16) | bytes[8]) / 10).toFixed(1));
        }

        if (bytes[9] == 0xff && bytes[10] == 0xff) {
          data.Temp_C3 = 'NULL';
        } else {
          data.Temp_C3 = parseFloat((((bytes[9] << 8) | bytes[10]) / 10).toFixed(1));
        }
      } else if (mode == '31') {
        data.Work_mode = 'ALARM';
        data.Temp_Red_MIN = (bytes[4] << 24) >> 24;
        data.Temp_Red_MAX = (bytes[5] << 24) >> 24;
        data.Temp_White_MIN = (bytes[7] << 24) >> 24;
        data.Temp_White_MAX = (bytes[8] << 24) >> 24;
        data.Temp_Black_MIN = (bytes[9] << 24) >> 24;
        data.Temp_Black_MAX = (bytes[10] << 24) >> 24;
      }

      if (bytes.length == 11)
        return {
          data: data,
        };
      break;

    case 5:
      {
        if (bytes[0] == 0x19) data.SENSOR_MODEL = 'D20-LB';

        if (bytes[4] == 0xff) data.SUB_BAND = 'NULL';
        else data.SUB_BAND = bytes[4];

        if (bytes[3] == 0x01) data.FREQUENCY_BAND = 'EU868';
        else if (bytes[3] == 0x02) data.FREQUENCY_BAND = 'US915';
        else if (bytes[3] == 0x03) data.FREQUENCY_BAND = 'IN865';
        else if (bytes[3] == 0x04) data.FREQUENCY_BAND = 'AU915';
        else if (bytes[3] == 0x05) data.FREQUENCY_BAND = 'KZ865';
        else if (bytes[3] == 0x06) data.FREQUENCY_BAND = 'RU864';
        else if (bytes[3] == 0x07) data.FREQUENCY_BAND = 'AS923';
        else if (bytes[3] == 0x08) data.FREQUENCY_BAND = 'AS923_1';
        else if (bytes[3] == 0x09) data.FREQUENCY_BAND = 'AS923_2';
        else if (bytes[3] == 0x0a) data.FREQUENCY_BAND = 'AS923_3';
        else if (bytes[3] == 0x0b) data.FREQUENCY_BAND = 'CN470';
        else if (bytes[3] == 0x0c) data.FREQUENCY_BAND = 'EU433';
        else if (bytes[3] == 0x0d) data.FREQUENCY_BAND = 'KR920';
        else if (bytes[3] == 0x0e) data.FREQUENCY_BAND = 'MA869';

        data.FIRMWARE_VERSION = (bytes[1] & 0x0f) + '.' + ((bytes[2] >> 4) & 0x0f) + '.' + (bytes[2] & 0x0f);
        data.BAT = ((bytes[5] << 8) | bytes[6]) / 1000;
      }
      return {
        data: data,
      };
      break;

    default:
      return {
        errors: ['unknown FPort'],
      };
  }
}