#!/usr/bin/env zsh
emulate -L zsh
setopt err_exit no_unset

region="us-east-1"
dry_run=0
environment=""

while getopts ":nr:" opt; do
    case "$opt" in
        n)
            dry_run=1
            ;;
        r)
            region=$OPTARG
            ;;
        :)
            print -u2 -- "missing value for -$OPTARG"
            exit 1
            ;;
        \?)
            print -u2 -- "unknown option: -$OPTARG"
            exit 1
            ;;
    esac
done

shift $((OPTIND - 1))
environment=${1:-}

if (( ${#environment} == 0 )); then
    print -u2 -- "missing environment"
    exit 1
fi

print -r -- "environment=$environment"
print -r -- "region=$region"
print -r -- "dry_run=$dry_run"