#!/bin/bash

ALBUM_NAME="${1}"
OLD_FORMAT="flac"
NEW_FORMAT="mp3"
NEW_ALBUM_NAME="${ALBUM_NAME}_${NEW_FORMAT}"
BITRATE="128k"
LOG_LEVEL="error"

## If it's an album
if [ -d "${ALBUM_NAME}" ]; then
  printf 'Convert %s to %s\n' "${ALBUM_NAME}" "${NEW_ALBUM_NAME}"

  ## Create the new directory
  mkdir -p "${NEW_ALBUM_NAME}"

  ## Go to the album directory
  pushd "${ALBUM_NAME}"

  ## For all files with the old format in the album directory
  for FILE in *.${OLD_FORMAT}
  do
    # -v error: display only if error
    avconv -v "${LOG_LEVEL}" -i "${FILE}" -b "${BITRATE}" "${NEW_ALBUM_NAME}/${FILE%${OLD_FORMAT}}${NEW_FORMAT}"
  done

  popd

else
  FILE="${ALBUM_NAME}"
  if [ -f "${FILE}" ]; then
    printf 'Convert %s to %s\n' "${FILE}" "${NEW_FORMAT}"
    avconv -v "${LOG_LEVEL}" -i "${FILE}" -b "${BITRATE}" "${FILE%${OLD_FORMAT}}${NEW_FORMAT}"
  fi

fi