#!/bin/bash

function extract_XML_value() {
  # $1 entity name
  # $2 string to find
  echo -n "$2" | egrep -o "<$1>[^<]+" | sed -e "s/<$1>//"
}

artist=`mpc -f '%artist%' current | sed -e "s/\\ /+/g"`
album=`mpc -f '%album%' current | sed -e "s/\\ /+/g"`

lastfm_key="5c74acc7a4b3db44a25e75ff8fc89543"
url="ws.audioscrobbler.com"
path="/2.0/?method=album.getinfo&api_key=$lastfm_key&artist=$artist&album=$album"

f_image_extralarge="$artist""_""$album""_""xl.png"

image_dir="/home/xqwutaitezr/music/covers"

function retrieve () {
  _ret=$(wget "$url$path" -O -)

  mkdir -p $image_dir
  image_extralarge=$(extract_XML_value 'image size="extralarge"' "$_ret" 2>/dev/null)

  [[ "$image_extralarge" != "" ]] && [[ ! -f "$image_dir/$f_image_extralarge" ]] && wget "$image_extralarge" -O "$image_dir/$f_image_extralarge" > /dev/null
}

if [[ $(mpc status | grep "playing" | wc -l ) -gt 0 ]]
then
  if [[ ! -f "$image_dir/$f_image_extralarge" ]]
  then
    retrieve
  fi
  ahoviewer $image_dir/$f_image_extralarge &
fi

echo $f_image_extralarge