#!/bin/bash
#
# Author   : Gaston Gonzalez
# Date     : 11 October 2024
# Updated  : 24 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             - select active radio"
}

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" "Radio 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)

    NO_RADIO_ID="no-radio"

    options=()
    options+=("${NO_RADIO_ID}" "No radio")
    while IFS= read -r radio; do
        ID=$(cat $radio | jq -r .id)
        VENDOR=$(cat $radio | jq -r .vendor)
        MODEL=$(cat $radio | jq -r .model)

        options+=("$ID" "$VENDOR $MODEL")
    done < <(find $ET_HOME/conf/radios.d -type f | sort)

    SELECTED_RADIO=$(dialog --clear --menu "Select a radio:" 15 50 10 "${options[@]}" 3>&1 1>&2 2>&3)
    exit_status=$?

    # Reset terminal to its original state
    clear && tput sgr0

    if [ $exit_status -eq 0 ]; then

      # Special case to run without a radio configured
      if [ ${SELECTED_RADIO} == ${NO_RADIO_ID} ]; then
        [ -e ${ACTIVE_RADIO} ] &&  rm ${ACTIVE_RADIO} 
        echo "Set active radio to: $SELECTED_RADIO"
        exit 0
      fi

      RADIO_CONF="${ET_HOME}/conf/radios.d/$SELECTED_RADIO.json"
      [ -e ${ACTIVE_RADIO} ] &&  rm ${ACTIVE_RADIO} 
      ln -s ${RADIO_CONF} ${ACTIVE_RADIO}
      echo "Set active radio to: $SELECTED_RADIO"
    else
      echo "No radio selected."
    fi

    ;;
  active)

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