consistent naming for tv shows in multimedia collection

mv.sh

#!/usr/bin/env bash

set -o errexit
set -o nounset
set -o pipefail
shopt -s inherit_errexit

confirm="${1:-no}"

series="${PWD##*/}"
series="$(tr '[:upper:]' '[:lower:]' <<< "${series}")"
series="${series%-*}"

readarray -t seasons < <(find . -mindepth 1 -maxdepth 1 -type d | sort)
for season in "${seasons[@]}"
do
	season="${season##*/}"

	readarray -t episodes < <(find "${season}" -mindepth 1 -maxdepth 1 -type f | sort)
	for episode in "${episodes[@]}"
	do
		episode="${episode##*/}"

		s="$(grep -Eio 's[0-9]{2}' <<< "${episode}")"
		s="$(tr '[:upper:]' '[:lower:]' <<< "${s}")"
		s="${s#s}"

		e="$(grep -Eio 'e[0-9]{2}' <<< "${episode}")"
		e="$(tr '[:upper:]' '[:lower:]' <<< "${e}")"
		e="${e#e}"

		ext="${episode##*.}"
		ext="$(tr '[:upper:]' '[:lower:]' <<< "${ext}")"

		if test -n "${series}" && test -n "${s}" && test -n "${e}" && test -n "${ext}"
		then
			fileOld="${season}/${episode}"
			fileNew="${season}/${series}-s${s}e${e}.${ext}"

			if test "${confirm}" = "yes" && test "${fileOld}" != "${fileNew}"
			then
				mv "${fileOld}" "${fileNew}"
			else
				echo mv "${fileOld}" "${fileNew}"
			fi
		fi
	done
done