#!/bin/bash

function show_menu( )
{
	sed 's/\t\+/\t/g' < demo.ini |
	awk -F '\t' '{ printf( "%2d. %-30.30s", ++ i, $2 ); if ( i % 2 == 0 ) printf( "\n" ); }'
}

function check_dependencies( )
{
	option=$1
	if [ $option -gt 0 ]
	then
		deps=`sed 's/\t\+/\t/g' < demo.ini | cut -f 3 | head -n $option | tail -n -1`
		if [ "$deps" != "" ]
		then
			echo "$deps" | 
			tr ',' '\n' | 
			while read dep 
			do
				ls $dep > /dev/null 2>&1
				val=$?
				[ $val != 0 ] && echo Failed to find $dep >&2 && echo $val
			done
		fi
		echo 0
	fi
}

function get_demo( )
{
	option=$1
	if [ $option -gt 0 ]
	then
		cut -f 1 demo.ini | head -n $option | tail -n -1
	fi
}

while [ 1 ]
do

cat << "eof"
Select Consumer

1. Play with Inigo half size
2. Play with Inigo full size
3. Serialise with Westley to terminal
4. Play with Westley

0. Exit

eof

	echo -n "Option: "
	read option
	echo

	export MLT_CONSUMER=

	case "$option" in
		"0" ) exit 0 ;;
		"1" ) export MLT_CONSUMER="sdl:360x288 buffer=1" ;;
		"2" ) export MLT_CONSUMER="sdl" ;;
		"3" ) export MLT_CONSUMER="westley" ;;
		"4" ) export MLT_CONSUMER="westley:" ;;
		"5" ) export MLT_CONSUMER="mcdv:NTSC target=/dev/dv1394 rescale=nearest" ;;
		"6" ) export MLT_CONSUMER="bluefish:NTSC" ;;
		"7" ) export MLT_CONSUMER="sdl rescale=none" ;;
	esac

	while [ $option != 0 -a "$MLT_CONSUMER" != "" ]
	do
		echo Choose Demo
		echo
	
		show_menu
	
		echo
		echo -n "Option: "
		read option
		echo
	
		demo=`get_demo $option`
		usable=`check_dependencies $option`
	
		if [ "$usable" = "0" -a "$demo" != "" ]
		then
			if [ "$MLT_CONSUMER" == "westley:" ]
			then	export WESTLEY_CONSUMER="westley:$demo.westley"
					bash $demo -consumer $WESTLEY_CONSUMER
					inigo +$demo.txt out=100 $demo.westley $demo.westley -filter watermark:watermark1.png composite.fill=true
			elif [ "$MLT_CONSUMER" == "westley" ]
			then	bash $demo -consumer $MLT_CONSUMER | less
			else	bash $demo -consumer $MLT_CONSUMER
			fi
		elif [ "$usable" != "" ]
		then
			echo 
			echo Unable to locate suitable files for the demo - please provide them.
			read pause
		fi
	
		stty sane
	done

done