#!/bin/bash
# get info about device and signal of Huawei mobile USB devices
# parm:
# $1 : requested information (manufacturer, device, imei, imsi, telnumber, ipaddress, mode, signal, operator)
# $2 : (optional) type - hilink or modem (default: hilink)
# $3 : (optional) for hilink: ip address of the device (default: 192.168.8.1)
#                 for modem: tty interface for communication (default: /dev/ttypUSB2)
#
# requires: bc
# calls the scripts info_huawei_hilink.sh and info_huawei_modem.sh (same path as this script)
#
# zbchristian 2020
#
opt="device"
if [ ! -z $1 ]; then opt=${1,,}; fi
type="hilink"
if [ ! -z $2 ]; then type=${2,,}; fi

path=`dirname $0`
if [[ $type == "hilink" ]]; then
  connect="192.168.8.1"
  if [ ! -z $3 ]; then connect=$3; fi
  script="$path/info_huawei_hilink.sh"
else
  connect="/dev/ttyUSB2"
  if [ ! -z $3 ]; then connect=$3; fi
  script="$path/info_huawei_modem.sh"
fi
res=`$script $opt $connect`

# some results require special treatment
case $opt in

#  manufacturer)
#    if [[ $res == "none" ]]; then res="Huawei"; fi
#    ;;

#  device)
#    if [[ ! $res == "none" ]]; then res="Huawei $res"; 
#    else res="Huawei"; fi
#    ;;

  mode)
    if [[ ! $res == "none" ]]; then
      if [[ $type == "hilink" ]]; then
        if [[ $res == "LTE" ]]; then res="4G"
        elif [[ $res == "WCDMA" ]]; then  res="3G";
        else res="2G"; fi
      else
        if [[ $res == 7 ]]; then res="4G"
        elif [[ $res < 7 ]] && [[ $res > 2 ]] ; then  res="3G";
        else res="2G"; fi
      fi
    fi
    ;;

  signal)
  # return signal strength/quality in %
    if [[ $type == "hilink" ]]; then
     # signal request tries to get RSRQ value
     # try to get RSRQ (4G), EC/IO (3G) or RSSI (2G) value
     if [[ $res == "none" ]]; then res=`$script "ecio"`; fi
     if [[ ! $res == "none" ]]; then 
       # for rsrq and ecio assume: -3dB (100%) downto -20dB (0%)
       qual=${res//dB/}
       if [[ ! "$qual" =~ [-0-9\.]* ]]; then qual=-100; fi
       qual=$(bc <<< "scale=0;res=$qual-0.5;res/1") # just round to next integer 
       if [[ $qual -le -20 ]]; then qual=0; 
       elif [[ $qual -ge -3 ]]; then qual=100; 
       else  qual=$(bc <<< "scale=0;res=100.0/17.0*$qual+2000.0/17.0;res/1"); fi
     else
      # try rssi: >-70dBm (100%) downto -100dBm (0%)
      res=`$script "rssi"`;
      if [[ ! $res == "none" ]]; then
        if [[ $res =~ [-0-9\.]* ]]; then res="-120 dBm"; fi
        qual=${res//dBm/}
        qual=$(bc <<< "scale=0;res=$qual+0.5;res/1") # just round to next integer 
        if [[ $qual -le -110 ]]; then qual=0;
        elif [[ $qual -ge -70 ]]; then qual=100; 
        else  qual=$(bc <<< "scale=0;res=2.5*$qual+275;res/1"); fi
      fi
     fi
    else
     # modem returns RSSI as number 0-31 - 0 = -113dB (0%), 1 = -111dB, 31 = >=51dB (100%)
     qual=$(bc <<< "scale=0;res=$res*3.5+0.5;res/1")
     if [[ $qual -gt 100 ]]; then res=100; fi
    fi
    if [[ ! "$res" == "none" ]]; then res="$res (${qual}%)"; fi
    ;;
    
  operator)
    # check if operator/network is just a 5 digit number -> extract network name from table
    if [[ $res =~ ^[0-9]{5}$ ]]; then
      mcc=${res:0:3}
      mnc=${res:3:2}
      op=$(cat $path/mcc-mnc-table.csv | sed -rn 's/^'$mcc'\,[0-9]*\,'$mnc'\,(.*\,){4}(.*)$/\2/p')
      if [[ ! -z $op ]]; then res="$op ($res)"; fi
    fi
   ;;

  *)
    ;;
esac

echo $res