#!/usr/bin/env bash

POSITIONAL=()
while [[ $# -gt 0 ]]
do
key="$1"

case $key in
    --token)
    TOKEN="$2"
    shift # past argument
    shift # past value
    ;;
    --device)
    DEVICE="$2"
    shift # past argument
    shift # past value
    ;;
    --volume-name)
    VOLUME_NAME="$2"
    shift # past argument
    shift # past value
    ;;
    --volume-region)
    VOLUME_REGION="$2"
    shift # past argument
    shift # past value
    ;;
    --buffer)
    BUFFER="$2"
    shift # past argument
    shift # past value
    ;;
    *)    # unknown option
    POSITIONAL+=("$1") # save it in an array for later
    shift # past argument
    ;;
esac
done
set -- "${POSITIONAL[@]}" # restore positional parameters

echo "DEBUG"
echo "====="
echo "TOKEN = ${TOKEN}"
echo "DEVICE = ${DEVICE}"
echo "VOLUME_NAME = ${VOLUME_NAME}"
echo "VOLUME_REGION = ${VOLUME_REGION}"
echo "BUFFER = ${BUFFER}"
echo

digital_ocean_api () {
  api="https://api.digitalocean.com/v2"
  endpoint=$1
  curl --silent -X GET -H "Content-Type: application/json" -H "Authorization: Bearer ${TOKEN}" "${api}/${endpoint}"
}

main () {
  # Get volume data
  echo "Getting data for volume \"${VOLUME_NAME}\" in region \"${VOLUME_REGION}\"..."
  volume_json=$(digital_ocean_api "volumes?region=${VOLUME_REGION}" | jq -r --arg VOLUME_NAME "${VOLUME_NAME}" '.volumes | .[] | select(.name==$VOLUME_NAME)')
  volume_id=$(echo $volume_json | jq -r .id)
  volume_size=$(echo $volume_json | jq -r .size_gigabytes)
  echo "Volume ID is \"${volume_id}\" and is currently ${volume_size}GB"
}

main