#!/bin/bash
# BUTTONS GPIO NUMBERS FOR PHAT BEAT
# https://pinout.xyz/pinout/phat_beat#
# ADD TO /etc/local for autostart
#
ONOFF=12
VOLUP=16
VOLDO=26
BCK=13
PLAY=6
FWD=5

# ADD YOUR DEFAULT RADIO STREAM / PLAYLIST HERE - TRACK INFORMATION FOR RECORDING ;)
PLAYLIST="/home/pi/playlists/default.m3u"

function trim() {
	local var="$*"
	# remove slashes
	var=$(echo "$var" | sed 's/\// /g')
	var=${var//[^a-zA-Z0-9_\. ]/}
	# remove leading whitespace characters
	var="${var#"${var%%[![:space:]]*}"}"
	# remove trailing whitespace characters
	var="${var%"${var##*[![:space:]]}"}" 

	echo -n "$var"
}

function button() {
  pin=$1
  gpio -g mode $pin in # make sure pin is configured as an input
  gpio -g mode $pin up # enable pull-up resistor
  boucle=0

  while :; do
	gpio -g wfi $pin falling # wait for a button action
	sleep 0.2
	echo $pin
	while [[ $(gpio -g read $pin) -eq 0 ]]
	do
		aplay bip.wav
		sleep 0.5 # COUNT 1/2 SECOND PRESSED
		boucle=$(bc -l <<< "$boucle + 1")
	done
	if [[ $boucle -gt 0 ]]; then
		echo "LP-$pin-$boucle"
	fi
	boucle=0
  done
}

boucle=0

# --- main loop ---
while :; do
  read numbut

	# WHAT IS ON AIR
	watch="$(mpc | head -1):"

	# EXTRACT ($radio :) $artist - $song
	radio=$(echo "$watch" | cut -d ":" -f 1 | xargs)
	if [[ "$radio" != "$watch" && $radio != "volume" && $radio != "http" ]]; then RADIO="$radio"; else radio="$watch"; RADIO=""; fi
	play=$(echo "$watch" | cut -d ":" -f 2)
	artist=$(echo "$play" | cut -d "-" -f 1)
	artist=$(trim "$artist")
	song=$(echo "$play" | cut -d "-" -f 2)
	song=$(trim "$song")
	if [[ "$song" == "" ]]; then
		song=$(echo "$play" | cut -d " " -f 2)
		song=$(trim "$song")
	fi

	# TODO: ADAPT BEHAVIOUR TO EACH RADIO STREAM
    # NOVA RADIO PATCH
    if [[ "$radio" == "Nova zz" ]]; then
        artist=""
        song=""
    fi

	echo "(CLICK $numbut) $RADIO: $artist / $song"
	
	case "$numbut" in
	$ONOFF)
		echo "REC"
		# BUTTON QUICK RELEASE
		if [[ $(gpio -g read $ONOFF) -eq 1 ]]; then
			# RECORD STREAMING SONG::GENERIC
			if [[ "$RADIO" != "" && "$artist" != "" && "$song" != "" && "$artist" != "$song" ]]; then
				what=$(grep "$RADIO|$artist|$song" /tmp/ytdl.list)
				if [[ "$what" == ""  ]]; then
					~/parle.sh "Enregistrement ajouté."
					echo "$RADIO|$artist|$song" >> /tmp/ytdl.list
				else
					~/parle.sh "Enregistrement déjà existant!"
				fi
			elif [[ "$artist" == "$song" ]]; then
				~/parle.sh "Enregistrement $radio"
				# USE COPY & MODULE FIFO
				echo "$radio||" >> /tmp/ytdl.list # TODO REMOVE
			else
				~/parle.sh "Podcast ou Fichier local. Enregistrement inopérant."
			fi
		fi
	;;
	LP-$ONOFF-*)
		# LONG PRESS TRACK IDENTIFICATION
		playing=$(mpc | head -1 | cut -d ":" -f 1 | cut -d "/" -f 1 | xargs)
		playing=$(trim "$playing")
		~/parle.sh "$playing"
		if [[ "$RADIO" != "" && "$artist" != "" && "$song" != "" && "$artist" != "$song" ]]; then
			~/parle.sh "$artist - $song"
		fi
	;;
	$PLAY)
		echo "PLAY"
		if [[ $(gpio -g read $PLAY) -eq 1 ]]; then
			mpc toggle
		fi		
	;;
	LP-$PLAY-*)
		sec=$(echo "$numbut" | cut -d "-" -f 3)
		case "$sec" in
		1)
		# 1SEC 
			# Check if USB drive connected
			if [[ -b /dev/sda1 ]]; then
				~/parle.sh "Synchronisation musique sur clé U S B. Veuillez patienter"
				sudo mount /dev/sda1 /mnt
				sudo mkdir -p /mnt/CopyLaRadio
				sudo rsync -rtgoDv /home/pi/music/ /mnt/CopyLaRadio
				sudo umount /dev/sda1
				~/parle.sh "Transfert terminé. Vous pouvez débrancher votre clé..."
			else
			# STOP MUSIC
			 	~/parle.sh "STOP"
				mpc stop
			fi
		;;
		2)
		# 2SEC = CHANGE MODE SHUFFLE LOCAL / DEFAULT PLAYLIST
		if [[ "$RADIO" != "" && "$mode" == "" ]]; then
			mode="LOCAL"
			~/parle.sh "Lecture musique locale"
			mpc clear
			mpc listall | mpc add
			mpc shuffle
			~/parle.sh "Aléatoire"
			mpc play
		else
			mode=""
			mpc clear
			mpc load default
			~/parle.sh "Lecture liste par défaut"
			mpc play
		fi
		;;
		3)
		#  3 SEC = HALT SYSTEM
			~/parle.sh "Arrêt RAIQUE MACHINE"
			sudo halt
		;;				
		*)
		#  > 3 SEC = REBOOT SYSTEM
			~/parle.sh "Redémarrage RAIQUE MACHINE"
			sudo reboot
		;;		
		esac
	;;
	$BCK)
		echo "BCK"
			mpc -q prev
	;;
	$FWD)
		echo "FWD"
			mpc -q next
	;;
	$VOLUP)
		echo "VOLUP"
		if [[ $(gpio -g read $VOLUP) -eq 1 ]]; then
			mpc -q volume +10
			vol=$(mpc volume | cut -f 2 -d ":")
			vol=$(trim "$vol")
			if [ "$vol" == "100%" ]; then ~/parle.sh "VOLUME MAXIMUM"; fi
		fi
	;;
	LP-$VOLUP-*)
		sec=$(echo "$numbut" | cut -d "-" -f 3)
		sec=+$(bc -l <<< "$sec * 10")
		mpc -q volume $sec
	;;
	$VOLDO)
		echo "VOLDO"
		if [[ $(gpio -g read $VOLDO) -eq 1 ]]; then
			mpc -q volume -10
			vol=$(mpc volume | cut -f 2 -d ":")
			vol=$(trim "$vol")
			if [ "$vol" == "0%" ]; then ~/parle.sh "VOLUME MINIMUM"; fi
		fi
	;;
	LP-$VOLDO-*)
		sec=$(echo "$numbut" | cut -d "-" -f 3)
		sec=-$(bc -l <<< "$sec * 10")
		mpc -q volume $sec
	;;
	*)
		echo $numbut
	;;
	esac

done < <( button $ONOFF & button $VOLUP & button $VOLDO & button $BCK & button $PLAY & button $FWD & ) # buttons on GPIOs to monitor