#!/bin/bash
#
# Author   : Gaston Gonzalez
# Date     : 11 October 2024
# Purpose  : A script for managaing plug-and-play radios
set -e

function usage() {
  echo "Usage: $(basename $0) <command>"
  echo "  active          - show active radio" 
  echo "  list            - list supported radios by id" 
  echo "  set <radio id>  - set radio as active by id" 
}

if [ $# -lt 1 ]; then
  usage
  exit 1
fi

ACTIVE_RADIO="${ET_HOME}/conf/radios.d/active-radio.json"

case $1 in
  list)

    printf "%-20s %-10s %-10s\n" "ID" "Vendor" "Model"

    find ${ET_HOME}/conf/radios.d -type f -name \*.json | sort -n | while read radio; do
      ID=$(cat $radio | jq -r .id)
      VENDOR=$(cat $radio | jq -r .vendor)
      MODEL=$(cat $radio | jq -r .model)

      printf "%-20s %-10s %-10s\n" $ID "$VENDOR" "$MODEL"
    done

    ;;
  set)
    if [ $# -ne 2 ]; then
      echo "Radio ID required. Run '$(basename $0) list' to get list of radios"
      usage
      exit 1
    fi
  
    RADIO_CONF="${ET_HOME}/conf/radios.d/$2.json"
    if [ ! -e ${RADIO_CONF} ]; then
      echo "Radio configuration does not exist for radio ID: '$2'"
      exit 1
    fi

    [ -e ${ACTIVE_RADIO} ] &&  rm ${ACTIVE_RADIO} 
    ln -s ${RADIO_CONF} ${ACTIVE_RADIO}

    ;;
  active)

    if [ ! -L "${ACTIVE_RADIO}" ]; then
      echo "No active radio defined. Run: '$(basename $0) set <radio ID>'"
      exit 1
    fi

    ID=$(cat ${ACTIVE_RADIO} | jq -r .id)
    VENDOR=$(cat ${ACTIVE_RADIO} | jq -r .vendor)
    MODEL=$(cat ${ACTIVE_RADIO} | jq -r .model)

    printf "%-20s %-10s %-10s\n" "Radio ID" "Vendor" "Model"
    printf "%-20s %-10s %-10s\n" $ID "$VENDOR" "$MODEL"

    printf "\nConfiguration Notes\n"
    cat ${ACTIVE_RADIO} | jq -r '.notes[] | "* \(.)"'
    ;;
  *)
    echo "Command not supported."
    usage
    exit 1
    ;;
esac