#! /usr/bin/env bash

SHOW_ALIASES=0
SHOW_FUNCTIONS=0
SHOW_MEMBASED=0
SHOW_SCRIPTS=0

NAME="${0##*/}"
eval set -- $(getopt --name "$NAME" --options 'afmsh' --longoptions aliases,functions,membased,scripts,all,help -- "${@}")

ARG_COUNT=0
SHOW_USAGE=0
while [[ $# -gt 0 ]] 
do
    opt="$1";
    #expose next argument
    shift;
    case "$opt" in
        '--' ) break 2;;
        '-h'|'-?' )  
            opt='--help' ;;
        '-a' )  
            opt='--aliases' ;;
        '-f' )
            opt='--functions' ;;
        '-m' )
            opt='--membased' ;;
        '-s' )
            opt='--scripts' ;;
    esac
    ((ARG_COUNT++))
    case "$opt" in
        '--help' ) SHOW_USAGE=1; break 2;;
        '--aliases' )
            SHOW_ALIASES=1 ;;
        '--functions' )
            SHOW_FUNCTIONS=1 ;;
        '--membased' )
            SHOW_MEMBASED=1 ;;
        '--scripts' )
            SHOW_SCRIPTS=1 ;;
        *) echo >&2 "Invalid option: $@"; exit 1;;
   esac
done

# If no args, show_usage
[[ $ARG_COUNT -eq 0 ]] && SHOW_SCRIPTS=0

if [[ "$SHOW_USAGE" == "1" ]]; then
    printf "%s\n" \
        "${0##*/}: ${0##*/} [-afhms] [--aliases] [--functions] [--help] [--membased] [--script]" \
        "    List POLARISqb productivity and helpdesk commands supplied by ITOps" \
        "" \
        "    Options:" \
        "      -a | --aliases    List aliases defined in Pqb startup scripts" \
        "      -f | --functions  List functions defined in Pqb startup scripts" \
        "      -h | --help       Display this usage message" \
        "      -m | --membased   List all memory based commands (aka, aliases " \
        "                        and functions)." \
        "      -s | --scripts    List Pqb supplied utility scripts" \
        "                        This is the default when no arguments are passed" \
        ""

    return 2>/dev/null || exit
fi
FILTER=""
if [[ "$SHOW_ALIASES" == "1" || "$SHOW_MEMBASED" == "1" ]]; then
    FILTER+="^\W*alias\|"
fi
if [[ "$SHOW_FUNCTIONS" == "1" || "$SHOW_MEMBASED" == "1" ]]; then
    FILTER+="^\W*functions\|"
fi
if [[ -n "$FILTER" ]]; then
    FILTER=${FILTER%\\|*}
    find ~/.pqb.shrc.d -type f \
        | xargs grep "${FILTER}" \
        | sed 's/^.*\.d\///; s/:.*function /:(f) /; s/() {.*$//; s/:.*alias /:(a) /; s/=.*$//;'
fi

[[ "$SHOW_ALIASES" == "0" && "$SHOW_MEMBASED" == "0" && "$SHOW_MEMBASED" == "0" ]] && SHOW_SCRIPTS=1

if [[ "$SHOW_SCRIPTS" == "1" ]]; then
    find ~/.local/bin -executable -type f -name "pqb*" -printf "%f\n"
fi