#!/usr/bin/env bash

# CONSTANTS

BASEDIR=$(dirname "$0")
CONTAINERS=()
YES=false
FORCE=false

# FUNCTIONS

function usage {
	echo "$(basename "$0") <CONTAINER_NAME>... [--yes|-y] [--force|-f]"
}

function flatten_short_options {
	local -n result=$1
	shift
	result=()
	for word in "$@"; do
		[[ $word == -- ]] && break
		if [[ $word =~ ^-[a-z][a-z] ]]; then
			word=${word:1}
			for ((i = 0; i < ${#word}; i++)); do result+=("-${word:i:1}"); done
		else
			result+=("$word")
		fi
	done
}

function parse_options {
	while [[ $# -gt 0 ]]; do
		case "$1" in
			--help | -h)
				usage && exit 0
				;;
			--yes | -y)
				YES=true
				;;
			--force | -f)
				FORCE=true
				;;
			-*)
				echo >&2 "Error: unknown option: $1" && usage && exit 2
				;;
			*)
				CONTAINERS+=("$1")
				;;
		esac

		shift 1 # Move to the next argument
	done

	[[ ${#CONTAINERS[@]} == 0 ]] && usage && exit 1 || true
}

function confirm_destructive {
	local message="${1:-This cannot be undone!}"
	echo "⚠️  WARNING: $message"
	read -p "Type YES to confirm: " response
	case "$response" in
		[yY][eE][sS] | [yY]) return 0 ;;
		*) echo "canceled!" && return 1 ;;
	esac
}

function force_option {
	[[ $FORCE == false ]] && return
	echo '--force '
}

function destroy {
	[[ $YES == false ]] && confirm_destructive "you are about to destroy ${#CONTAINERS[@]} containers <${CONTAINERS[*]}>" $(force_option)
	incus delete "${CONTAINERS[@]}" $(force_option)
}

# MAIN

set -Eue
flatten_short_options flat "$@"
parse_options "${flat[@]}"
destroy