findinsensitiveduplicate

#!/bin/bash 

set -e

if [[ $# != 1 ]] ; then
    echo 'Il comando chiede un argomento, la cartella dove scansionare'
    exit 0
fi

RED='\033[1;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
NC='\033[0m'

echo
echo -e "${GREEN}--> Inizia la scansione "$(date '+%d/%m/%Y %H:%M:%S')${NC}
echo

SUB_SPACE="____"
# find all files inside folder passing has argument, only with basename.
LISTFILES=$(find $1 -type f -print0 | xargs -0 -n 1 basename | tr " " "${SUB_SPACE}")
files_list=()
COUNT=0
echo -e "${GREEN}--> In questa cartella ci sono $(echo $LISTFILES | wc -w) file"${NC}
echo -e "${GREEN}--> Sto cercando i file duplicati, potrebbe volerci del tempo"${NC}
echo
for f in $LISTFILES; do
  FOUND=0
  if [ ${#files_list[@]} -gt 0 ]; then
    # to lower, because i need to compare insensitive string
    F1=$(printf "$f" | tr '[:upper:]' '[:lower:]')
    for el in ${files_list[*]}; do
      F2=$(printf "$el" | tr '[:upper:]' '[:lower:]')
      if [ "$F1" == "$F2" ]; then
        FOUND=1
        break
      fi
    done
  fi
  if [ "$FOUND" -eq "1" ]; then
    continue
  fi
  files_list[$COUNT]=${f}
  COUNT=$((COUNT+1))
done


echo -e "${GREEN}--> Costruisco il report"
echo
for el in ${files_list[*]}; do
  NORM_EL=$(echo "$el" | tr "${SUB_SPACE}" " ")
  RES=$(find $1 -iname "$NORM_EL" -type f)
  N_RES=$(echo $RES | wc -w)
  if [ "$N_RES" -gt 1 ]; then
    printf "${RED}File duplicati per ${YELLOW}${el}${NC} : \n"
    printf "${RES}\n"
    echo
  fi
done

echo -e "${GREEN}--> Script Terminato "$(date '+%d/%m/%Y %H:%M:%S')${NC}
echo

echo