#!/bin/bash
# TODO: If $stop similar to "Bus Station" then reject and suggest user tries supplying a route number to see when their next bus leaves the station
# TODO: Fix space at the start of new lines in result
read stop

# function to provide data to a for loop
_jq() {
  echo ${json} | base64 --decode | jq -r ${1}
}

_liveresult() {
  livetimes=$(curl --silent https://admin.libertybus.je/api/v1/soj/stop_updates/${stop})
  # doesn't work without encoding in base64 (why?)
  for json in $(echo "${livetimes}" | jq -r '.[] | @base64'); do
    result="$result Dest: $(_jq '.destination') |"
    result="$result ETA: $(_jq '.eta') |"
    result="$result Route: $(_jq '.service_number')\n"
  done
  echo -e $result
  # is this the correct exit code?
  exit 0
}

_stopsreturn() {
  stops=$(curl --silent https://admin.libertybus.je/api/v1/stops/"${stop}" | jq -r '.')
  stopslen=$(echo ${stops} | jq '. | length')
  # if length of $stops array is 1 then only one bus stop matches and we can return live tiems for that stop
  if [ $stopslen = 1 ]; then
    stop=$(echo ${stops} | jq '.[].stop_id')
    _liveresult
  # multiple stops returned in $stops so we will return stop names and codes so user can retry
  else
    for json in $(echo "${stops}" | jq -r '.[] | @base64'); do
      result="$result Stop: $(_jq '.name') |"
      result="$result Code: $(_jq '.stop_id')\n"
    done
    echo -e $result
    # is this the correct exit code?
    exit 0
  fi
}

if [ "$stop" == "-h" ] || [ "$stop" == "--help" ]; then
  echo "Usage: '!livetimes <stop>' where <stop> is either the 4 digit stop code, the full unique or partial bus stop name. If a bus stop name is used and there are multiple matches then a list of matching stops will be returned with their codes."
  # is this the correct exit code?
  exit 0
elif [[ "$stop" =~ ^-?[0-9]+$ ]] && [ $(echo ${#stop} == 4) ]; then
  _liveresult
else
  _stopsreturn
fi