#!/bin/bash
#
# Script called by a2dp-agent to switch the mpd queue to Bluetooth A2DP and
# restore and continue playing when the Bluetooth connection is terminated.
#
# Version 1.0  03-11-2025

# Read configuration
. /etc/default/bluez-alsa

# Message logging.
info_log() {
  # If possible, log events in /var/log/messages:
  if [ -f /var/run/syslogd.pid ] && [ -x /usr/bin/logger ]; then
    /usr/bin/logger -t "a2dp-hook" --id="$$" "$*"
  else
    printf "%s: %s\\n" "a2dp-hook" "$*"
  fi
}


start() {
  info_log "Start A2DP sink"
  # First, create a new current playlist.
  if [ -f /var/mpd/playlists/QueueFile.m3u ]; then
    mpc rm QueueFile
  fi
  mpc save QueueFile
  info_log "Save current playlist in QueueFile.m3u"

  # Save current song in this playlist.
  POSITION=$(mpc status | head -2 | tail -1 | awk -F ' ' '{print $2}' | awk -F '#' '{print $2}' | awk -F '/' '{print $1}')
  echo -n $POSITION > /var/mpd/a2dp-position
  info_log "Playlist position $POSITION"

  # Create a new playlist
  if [ -f /var/mpd/playlists/Bluez.m3u ]; then
    mpc rm Bluez
  fi
  mpc addplaylist Bluez MPD_Specials/BatchComplete.mp3
  mpc addplaylist Bluez ${ALOOP}
  info_log "Created new playlist Bluez.m3u"

  # Activate the new playlist
  mpc clear >/dev/null
  mpc load Bluez >/dev/null
  mpc play >/dev/null
  info_log "Started playlist Bluez.m3u"
}


stop() {
  info_log "Stop A2DP sink"
  mpc clear >/dev/null
  mpc load QueueFile >/dev/null
  mpc play $(cat /var/mpd/a2dp-position) >/dev/null
  info_log "Loaded playlist QueueFile.m3u, start play $(cat /var/mpd/a2dp-position)"
}


case "$1" in
  start)
        start
        ;;
  stop)
        stop
        ;;
  *)
        echo "Usage: $0 {start|stop}"
	exit 1
esac


exit 0