#!/bin/sh

MUSIC="$HOME/music"


list_dirs()
{
	find -L "$1" \
		-mindepth 1 -maxdepth 1 \
		-not -name "*.cue" |
		sed "s@^$1/@@" | sort;
}

find_song()
{
	file="$MUSIC"
	while [ -d "$file" ]
	do 
		choice="$(list_dirs "$file" | commander -clx)"
		[ "$choice" ] || return
		file="$file/$choice"
	done
	printf '%s' "${file##"$MUSIC/"}"
}

play_song()
{
	printf '%s\n' "$1" | tr '\n' '\0' |
		xargs -0I{} mpc insert "{}" || return
	mpc next 2> /dev/null
	mpc play 2> /dev/null
}

main()
{
	choice="$(printf 'volume\nsearch\ncommand\nall_search\nquit' | commander -c -w 5 -y 1)"
	case "$choice" in
		volume) 
			# Change volume while no error
			while true 
			do
				volume="$(mpc volume | awk -F '[ %]' '{print $2}')"
				nb="$(printf 'p\nm' | commander -c -y 2 -p "$volume" | tr 'pm' '+-')"
				[ "$nb" ] || break
				change="$(commander -ci -p "$volume$nb")"
				mpc volume "$nb$change" || break
			done ;;

		search) 
			song="$(find_song)"
			[ "$song" ] || return

			choice="$(printf 'insert\nadd\nplay' | commander -c -w 3 -y 1)"
			case "$choice" in
				insert|add) mpc "$choice" "$song" ;;
				play) play_song "$song" ;;
			esac ;;

		command) 
			mpc "$(printf 'next\nprevious\nclear\nstop\ntoggle' |
				commander -c -w 8 -y 5)" ;;

		all_search) 
			song="$(mpc listall | dmenu -l 20 -g 1 -c -x)"
			[ "$song" ] || return
			play_song "$song";;
		quit) return 1 ;;

		*) return 1 ;; 
	esac
	return 0
}

while main
do :;
done