#!/usr/bin/env bash

# CONSTANTS

BASEDIR=$(dirname "$0")
DEBIAN='images:debian/13'
CONTAINER=''

# FUNCTIONS

function usage {
	echo "$(basename "$0") <CONTAINER_NAME>"
}

function parse_options {
	while [[ $# -gt 0 ]]; do
		case "$1" in
			--help | -h)
				usage && exit 0
				;;
			*)
				if [[ -z $CONTAINER ]]; then
					CONTAINER=$1
				else
					echo >&2 "Unknown option: $1" && usage && exit 2
				fi
				;;
		esac

		shift 1 # Move to the next argument
	done
	[[ -n $CONTAINER ]] || (usage && exit 1)

}

function before_start {
	# cold changes
	if [[ -v MIAOU_BASH_DIR ]]; then
		incus config device add $CONTAINER MIAOU-BASH disk source=$MIAOU_BASH_DIR path=/opt/miaou-bash readonly=true | grep -q 'Device MIAOU-BASH added'
		incus config set $CONTAINER environment.PATH /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/opt/miaou-bash/tools
	else
		echo >&2 "Warn: variable MIAOU_BASH_DIR missing!"
	fi
	cat << EOF | incus file push --uid 0 --gid 0 --mode 644 --create-dirs - $CONTAINER/etc/systemd/resolved.conf.d/10-disable-ipv4-listener.conf
[Resolve]
LLMNR=no
DNSStubListener=no
EOF

}

function after_start {
	# hot changes
	incus exec "$CONTAINER" -- /opt/miaou-bash/init.sh

	local domain=$(incus network get incusbr0 dns.domain)
	domain=${domain:-incus}
	cat << EOF | incus file push --uid 0 --gid 0 --mode 644 --create-dirs - $CONTAINER/etc/hosts
127.0.1.1	$CONTAINER.$domain $CONTAINER
127.0.0.1	localhost
EOF
}

function create {
	incus create $DEBIAN $CONTAINER
	before_start
	incus start $CONTAINER
	after_start
}

# MAIN

set -Eue
parse_options $*
create
echo Success