#!/bin/bash -e

# Copyright (C) 2008 David Mandelberg

NAME="`basename "$0"`"
GST_LAUNCH="gst-launch-0.10 -t"
MODE="loop"
MUSIC="$HOME"
COUNT=-1

normalize_uri () {
	RET="$1"
	case "$1" in
		/*)
			;;
		*)
			RET="`pwd`/$RET"
			;;
	esac
	printf "%s" "$RET"
}

play_file () {
	FILE="`normalize_uri "$1"`"
	test x"$COUNT" = x0 && exit 0
	echo "Attempting to play file: $FILE..."
	$GST_LAUNCH playbin uri="file://$FILE"
	test x"$COUNT" = x"-1" || let COUNT--
}

TMP="`getopt -o hrslc: -l help,random,sequential,loop,count: -n "$NAME" -- "$@"`"
eval set -- "$TMP"

while true; do
	case "$1" in
		-h|--help)
			echo "$NAME [-r|-s|-l] [-c NUMBER] [-h] [FILE...]"
			echo "-r | --random: play files in random order"
			echo "-s | --sequential: play files once in order"
			echo "-l | --loop: play files continuously in order [DEFAULT]"
			echo "-c | --count NUMBER: play NUMBER files, then stop"
			echo "-h | --help: show this message"
			exit
			;;
		-r|--random)
			MODE="rand"
			shift
			;;
		-s|--sequential)
			MODE="seq"
			shift
			;;
		-l|--loop)
			MODE="loop"
			shift
			;;
		-c|--count)
			COUNT="$2"
			shift 2
			;;
		--)
			shift
			break
			;;
		*)
			echo "Internal error parsing options."
			exit 1
			;;
	esac
done

echo "Building list of files..."
PLS="`mktemp`"
for i in "$@"; do
	find "$i" -type f -print \
		| sort -dfn \
		>> "$PLS"
done

case "$MODE" in
	rand)
		echo "Randomizing order of list of files..."
		TMP="`mktemp`"
		while read LINE; do
			printf "%05d%05d:%s\n" "$RANDOM" "$RANDOM" "$LINE" >> "$TMP"
		done < "$PLS"
		sort < "$TMP" | cut -c 12- > "$PLS"
		rm -f "$TMP"
		unset TMP
		;;
esac

while test x"$COUNT" != x0; do
	while read LINE; do
		play_file "$LINE"
	done < "$PLS"
	test x"$MODE" = xseq && break
done