#!/bin/bash

PATTERN=""
ITEM_TYPE=""
BASE_DIR=""
KEEP=3

function show_help {
  echo -e 'Usage: ./clean-builds.sh [OPT]\nOptions:'
  echo -e '\td\tBase directory'
  echo -e '\tp\tFile / folder pattern: "*my-item*"'
  echo -e '\tt\tItem type:\n\t\t  f  file\n\t\t  d  directory'
  echo -e '\th\tshows this message and exit'
  exit
}

while getopts d:p:t:h OPTION;
do
  case "${OPTION}" in
    d)
      BASE_DIR=${OPTARG}
      ;;
    p)
      PATTERN=${OPTARG}
      ;;
    t)
      ITEM_TYPE=${OPTARG}
      ;;
    h|*)
      show_help
      exit
      ;;
  esac
done

DIRS_COUNT=$(find "${BASE_DIR}" -maxdepth 1 -name "${PATTERN}" -type "${ITEM_TYPE}" | wc -l)

shift "${DIRS_COUNT}"

if [[ "${DIRS_COUNT}" -gt "${KEEP}" ]]
then
  TO_DELETE="$(($DIRS_COUNT-3))"
  find "${BASE_DIR}" -maxdepth 1 -name "${PATTERN}" -type "${ITEM_TYPE}" | sort | head -n ${TO_DELETE} | xargs -I{} rm -rf {}
  echo "SUCCESS!"
  exit
fi

echo "NOTHING TO DO"

$ ./clean.sh -d "/home/user/" -p "*db-backup.sql" -t "f"