const MAX_LAST_DATA_AGE_MS = 2 * 60 * 1000;
  const INTERVAL_BETWEEN_IDLE_CHECK_MS = 30 * 1000;

  const config = require('komodo-sdk/config');

  const logger = require('komodo-sdk/logger');

  
  const modemInfo = {
      device: config.modem.device,
      manufacturer: null,
      model: null,
      imei: null,
      imsi: null,

      cops: null,
      networkId: null,
      networkName: null,
      signalStrength: null,
      signalStrengthTs: null,
      signalStrengthTsReadable: null,

      startTime: new Date(),
      lastWriteTs: null,
      lastReadTs: null,

  };

  if (!config.disable_idle_check) {
      setInterval(() => {
          const deltaMs = new Date() - Math.max(modemInfo.lastWriteTs, modemInfo.startTime);
          if (deltaMs >= (config.max_last_data_age_ms || MAX_LAST_DATA_AGE_MS)) {
              logger.warn(`Modem idle for ${deltaMs} ms. Modem stucked? Terminating!`);
              process.exit(1);
          }
      }, INTERVAL_BETWEEN_IDLE_CHECK_MS);
  }

  module.exports = modemInfo;