#!/usr/bin/env bash

#
# EXAMPLES:
#
# run on only one year in test mode
# ./kh_rename 1980 1980 test | less
#
# run on only one year in actual move mode
# ./kh_rename 1980 1980
#
# run several years in test mode
# ./wend_rename 1980 2010 test | less
#
# run several years in actual move mode
# ./wend_rename 1947 1987
#
#This script will rename files from 1972 thru 2009, going from yyyymmdd_time_NL.pdf to
#boul_neutl_fd_yyyymmdd_time.pdf

#the else at the bottom of the script says that if a month (diretory of 01 - 12) does not exist, continue on.
#added f3 because this dataset has 3 tokens, 1 is yyyymmdd, 2 is adding the boul_neutl_fd_ to each file, and 3. is
#keeping the time.



debug=0
start_year=1972
stop_year=2009
cwd=`pwd`

if [ -z "$1" ]; then
        echo "ERROR: no start year specified"
        echo "This script expects to be run from a top level directory, with folders of the form YYYY/MM below it"
        echo "USAGE: ${0} <start_year> <stop_year>"
        echo "EXAMPLE: ${0} 1980 1982"
fi

if [ -z "$2" ]; then
        echo "ERROR: no stop year specified"
        echo "This script expects to be run from a top level directory, with folders of the form YYYY/MM below it"
        echo "USAGE: ${0} <start_year> <stop_year>"
        echo "EXAMPLE: ${0} 1980 1982"
fi

if [ ! -z "${3}" ]; then
        debug=1
fi

start_year="${1}"
stop_year="${2}"

for yr in `seq ${start_year} ${stop_year}`

do
        for mo in `seq -w 01 12`
        do
                path="${yr}/${mo}"
                if [ -d ${path} ]
                then
                   cd ${path}
                   for file in *


                   do
                        f1="`echo $file | sed 's/_/ /g' | awk '{print $1}'`"
                        f3="`echo $file | sed 's/_/ /g' | awk '{print $2}'`"
			f2="boul_neutl_fd_${f1}_${f3}.pdf"
                        if [[ "${file}" =~ "boul.*" ]]
                        then
                        :
                        else
                             mv $file $f2
                        fi
                   done
                   cd ../..
                else
                   echo "${path} does not exist, continuing"
                fi
        done
done