#!/bin/bash

_list_audio_files() {
  if [[ $recursive -eq 0 ]]; then
    files=$( ls -p | grep -v /$ )
  else
    files=$( find . -type f )
  fi
  echo "$files" | \
    grep -i -e \.mp3$ -e \.ogg$ -e \.flac$ | \
    sort -V | \
    awk '{print "'"$PWD"'/"$0}'
}

_print_audio_files() {
  n=$( wc -l "$1" | awk '{print $1}' )
  i=0
  while read line; do
    i=$(( i + 1 ))
    printf "%s/%s %s\n" \
      $i $n "$( basename "$line" )"
  done < "$1"
}

_play() {
  mpv \
    --keep-open=no \
    --audio-display=no \
    --term-osd-bar \
    --msg-level=ffmpeg/audio=fatal,ad=fatal \
    --playlist="$1" $MPV_ARGS
}

echo ' -r   recursive
MPV_ARGS=..  to pass them..

# MPV audio shortcuts'
qolop c Y
echo '
| Key    | Command                    |
|:-------|:---------------------------|
| p      | Pause                      |
| Q      | Quit saving position       |
| <-/->  | Seek 5 seconds             |
| up/dn  | Seek 60 seconds            |
| < / >  | Prev/Next file             |
| [/]    | Change speed               |
| m      | Mute                       |
| 9/0    | Modify volume              |
| * /    | Modify volume              |
'
qolop c Z

recursive=0
for (( i=1; i<=$#; i++ )); do
  [[ "${!i}" = "-r" ]] && {
      recursive=1;
      continue
  }
done

if [[ -e "$1" ]]; then
  if [[ "$1" = *".m3u8" ]]; then
    _play "$1"
    exit $?
  fi
fi


playlistfile=$( mktemp )
if [[ $recursive -eq 1 ]]; then
    _list_audio_files > "$playlistfile"
else
  if [[ -n "$1" ]]; then
    for (( i=1; i<=$#; i++ )); do
        readlink -f "${!i}" >> "$playlistfile"
    done
  else
      _list_audio_files > "$playlistfile"
  fi
fi

_print_audio_files "$playlistfile"
if [[ -s "$playlistfile" ]]; then
  _play "$playlistfile"
else
  echo Playlist empty
fi

rm -f "$playlistfile"