#!/bin/bash -x
##########################
######## The script give the names of the infiles, outfile and
######## intermediate file that the imagemagick scripts will be
######## processing. Calls infiles in reverse order to "call-files".
##########################
trap "rm -f *.list *.mpc *.cache" 1 2 3 15
trap "exit 0" 2

# Calls each infile from the infolders listed in the file created by the master
CallFiles () {
while [ $FOLDER1 -ge $FOLDER2 ]; do
    FOLD_NAME=`awk -v pat="in$FOLDER1" '$0 ~ pat {print $2}' folder.list` # Check for the current folder name
    FILES=`awk -v pat="in$FOLDER1" '$0 ~ pat {print $3}' folder.list`	 # Check how many files there are in that folder
    eval COUNTIN=$1
    RenameIn
    FOLDER1=`echo $FOLDER1|sed 's/^0*//'`	# Zero needs to be taken away so 08 and 09 are recognized
    FOLDER1=$(( FOLDER1 - 1 ))			# Makes sure the next folder is called
    FOLDER1=`printf "%02d" $FOLDER1`		# Add 0 infront so that awk doesnt confuse teens with 1
    shift
done
    RenameOut
}

# Names each of the infiles from a folder starting with the file in
# the folder with the highest number. Once file 001.png has been
# called, returns to file with the highest number. Writes the
# current infile and its number to a special file called "caller.list"
RenameIn () {
if [ $COUNTIN -ge 1 ]; then
    eval infile=$FOLD_NAME/`printf "%03d" $COUNTIN`.png
    COUNTIN=$(( COUNTIN - 1 ))
    echo "$infile $COUNTIN">>caller.list
else
    eval infile=$FOLD_NAME/`printf "%03d" $FILES`.png
    COUNTIN=$FILES
    echo "$infile $COUNTIN">>caller.list
fi
}

# Gives a name to each output file and writes its name to the caller
# file. If there is no "ripples" effect, only an outfile name is
# created. If there is a "ripples" effect, an intermediate file is
# also given.
RenameOut () {
    if [ $comp_ripple = no ]; then
	outfile=$OUTFOLDER/`printf "%04d" $COUNT`.png
	echo "$outfile">>caller.list
    else
	outfile1=preripple.mpc
	outfile2=$OUTFOLDER/`printf "%04d" $COUNT`.png
	echo -e "$outfile1 \n$outfile2">>caller.list	
    fi
}

>caller.list		# erases caller file
CallFiles $1 $2