#!/usr/bin/env bash

ABSDIR="$( dirname "$(readlink -f -- "$0")" )"
source "${ABSDIR}"/../functions.sh
source "${ABSDIR}"/vars.sh

ensure_pwd_is_scriptdir
ensure_not_root

ensure_pod_exists "${pod_name}"
ensure_systemd_unit_exists "${service_name}"
ensure_variables_are_defined "$envvars"

current_version=$(podman container list -a --format "{{.Image}}" | grep -F "${service_image}" | awk -F: '{print $NF}')

reinstall_please () {
    for image in ${upstream_images}; do
	if ! podman image exists "${service_image}":"${service_version}"; then
	    podman image pull "${service_image}":"${service_version}" || exit 1
	fi
    done &&
    check_pod_running "${pod_name}" && ./40_stop.sh
    ./70_disable.sh && \
    ./80_destroy.sh && \
    ./10_install.sh && \
    ./20_enable.sh && \
    ./30_start.sh
}

cleanup_images () {
    echo "Remove ${current_version} images?"
    select yn in "Yes" "No"; do
	case $yn in
	    Yes)
		podman image rm "${service_image}":"${current_version}"
		exit 0
		;;
	    No)
		exit 0
		;;
	esac
    done
}

if [ "${current_version}" != "${service_version}" ]; then
    if [[ "${current_version}" > "${service_version}" ]]; then
	echo "WARNING : you are about to DOWNGRADE your installation"
    fi
    echo "Migrating from ${current_version} to ${service_version}. Proceed?"
    select yn in "Yes" "No"; do
	case $yn in
	    Yes)
		reinstall_please && \
		cleanup_images
		exit 0
		;;
	    No)
		exit 0
		;;
	esac
	done
else
    echo "Already using version ${service_version}. Exiting."
fi