// Décodeur LoRaWAN officiel : LDS02 - Door Sensor (Dragino)
// Source : https://github.com/TheThingsNetwork/lorawan-devices/blob/master/vendor/dragino/lds02.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 value = ((bytes[0] << 8) | bytes[1]) & 0x3fff;
  var bat = value / 1000; //Battery,units:V

  var door_open_status = bytes[0] & 0x80 ? 1 : 0; //1:open,0:close
  var water_leak_status = bytes[0] & 0x40 ? 1 : 0;

  var mod = bytes[2];
  var alarm = bytes[9] & 0x01;
  var data = {};
  switch (input.fPort) {
    case 10:
      if (mod == 1) {
        var open_times = (bytes[3] << 16) | (bytes[4] << 8) | bytes[5];
        var open_duration = (bytes[6] << 16) | (bytes[7] << 8) | bytes[8]; //units:min

        (data.BAT_V = bat), (data.MOD = mod), (data.DOOR_OPEN_STATUS = door_open_status), (data.DOOR_OPEN_TIMES = open_times), (data.LAST_DOOR_OPEN_DURATION = open_duration), (data.ALARM = alarm);
      } else if (mod == 2) {
        var leak_times = (bytes[3] << 16) | (bytes[4] << 8) | bytes[5];
        var leak_duration = (bytes[6] << 16) | (bytes[7] << 8) | bytes[8]; //units:min

        (data.BAT_V = bat), (data.MOD = mod), (data.WATER_LEAK_STATUS = water_leak_status), (data.WATER_LEAK_TIMES = leak_times), (data.LAST_WATER_LEAK_DURATION = leak_duration);
      } else if (mod == 3) {
        (data.BAT_V = bat), (data.MOD = mod), (data.DOOR_OPEN_STATUS = door_open_status), (data.WATER_LEAK_STATUS = water_leak_status), (data.ALARM = alarm);
      } else {
        (data.BAT_V = bat), (data.MOD = mod);
      }
      return {
        data: data,
      };
    default:
      return {
        errors: ['unknown FPort'],
      };
  }
}