#! /bin/bash

# Set a few variables we will need later.
ZENITY="zenity --window-icon=$SHOME/$ICON"
MENCODER="/opt/mplayer/bin/mencoder"
AUTOGLADE="/usr/bin/autoglade"

# Check for mencoder and autoglade.  Warn if 
# they are not installed.
if [ -e $MENCODER ]
then
	echo "Proceeding..."
else
	$ZENITY --error --text="Could not find mencoder at the defined location.  Install mencoder or change the MENCODER variable in the MOMC shell script to point to the proper location."
	exit
fi

if [ -e $AUTOGLADE ]
then
        echo "Proceeding..."
else 
        $ZENITY --error --text="Could not find autoglade at the defined location.  Install autoglade or change the AUTOGLADE variable in the MOMC shell script to point to the proper location."
	exit
fi

# The function that runs autoglade and the user the main menu GUI.  Then 
# it makes a couple of checks.
runAutoGlade() {
	DUMP=$($AUTOGLADE $0.glade)
	if [ $? -eq 0 ]
	then
		eval $DUMP

		if [ "$NewFileName" = "" ]
                then
                        $ZENITY --error --text="You didn't give your new file a name."
                        runAutoGlade
		fi

		if [ "$OpenFile" = 'None' ]
		then
			$ZENITY --error --text="You didn't select a file to convert."
			runAutoGlade
		else
			# Check to see if the file we're transcoding is actually a video file.
			EXT=`echo $OpenFile | awk -F. '{print $2}'`
			if [ $EXT = "mov" ] || [ $EXT = "mp4" ] || [ $EXT = "mpg" ] || [ $EXT = "mpeg" ] || [ $EXT = "vob" ] || [ $EXT = "avi" ] || [ $EXT = "wmv" ] || [ $EXT = "asf" ]
		        then
				reSize
			else
				$ZENITY --error --text="That file is not a video file format!"
				runAutoGlade
			fi
		fi
	else
		exit
	fi
}

reSize() {
	# Check what size user chose and set aspect ratio accordingly.
	if [ "$Size" = 'Normal' ]
	then
		ASPECT=""
	elif [ "$Size" = 'Palm-TX' ]
	then
		ASPECT="480:320"
	elif [ "$Size" = 'Palm-Tungsten-T' ]
	then
		ASPECT="150:114"
	elif [ "$Size" = 'Blackberry' ]
	then
		ASPECT="480:360"
	else
		$ZENITY --error --text="Whoops! Not sure how I got here."
		runAutoGlade
	fi

	# lowercase the new file extension
	LFormat=`echo $Format| tr “[:upper:]” “[:lower:]”`

	# Put the path to the new file, the new file name and the extension together
	FILENAME="$SaveTo/$NewFileName.$LFormat"

	# Check to see if the file already exists.  If it does, ask user what to do about it?
	if [ -e $FILENAME ]
	then
		OVWR=`$ZENITY --question --title="Overwrite file?" --text="A file by that name already exists!  Overwrite it?"`
		if [ "$?" == "0" ]
		then
			echo "Proceeding...";
			# Cludge.
		else
			runAutoGlade
		fi
	fi
	
	# If the user is trying to overwrite the original
	# file, tell them they can't.
	if [ $FILENAME == $OpenFile ]
	then
		$ZENITY --error --text="You are attempting to overwrite the source file.  You can't do that."
		runAutoGlade
	fi

	# Do the actual transcoding.  We have to
	# handle vob files a little differently from 
	# normal video files so we check to see which 
	# one we're using for input.
	if [ $EXT == "vob" ]
	then
		$MENCODER $OpenFile -oac lavc -ovc lavc -lavcopts vcodec=mpeg4 -vf spp,scale -o $FILENAME
	else
		if [ "$Size" == 'Normal' ]
		then
			$MENCODER $OpenFile -oac pcm -ovc lavc -lavcopts vcodec=mpeg4 -o $FILENAME
		else
			$MENCODER $OpenFile -oac pcm -ovc lavc -lavcopts vcodec=mpeg4 -vf scale=$ASPECT -o $FILENAME
		fi
	fi
	
	# Check to see how mencoder exited.  If 0, all is well.  If 1, an error occurred.
	if [ $? -eq 0 ]
	then
		$ZENITY --info --title="Transcode Complete" --text="The file completed transcoding."
	else
		$ZENITY --error --title="Error!" --text="An error occurred during transcoding."
	fi

	runAutoGlade
}

runAutoGlade