#!/command/with-contenv /usr/bin/bash
# shellcheck shell=bash
declare -r log_prefix="[init-user]"

# When the container is started as a non-root user (e.g. via `user: 999:999`
# in Docker Compose), usermod/groupmod require root and are meaningless.
# USERMAP_* variables only apply to the root-started path.
if [[ -n "${USER_IS_NON_ROOT}" ]]; then
	if [[ -n "${USERMAP_UID}" || -n "${USERMAP_GID}" ]]; then
		echo "${log_prefix} WARNING: USERMAP_UID/USERMAP_GID are set but have no effect when the container is started as a non-root user"
	fi
	echo "${log_prefix} Running as non-root user ($(id --user):$(id --group)), skipping UID/GID remapping"
	exit 0
fi

declare -r usermap_original_uid=$(id -u paperless)
declare -r usermap_original_gid=$(id -g paperless)
declare -r usermap_new_uid=${USERMAP_UID:-$usermap_original_uid}
declare -r usermap_new_gid=${USERMAP_GID:-${usermap_original_gid:-$usermap_new_uid}}

if [[ ${usermap_new_uid} != "${usermap_original_uid}" ]]; then
	echo "${log_prefix} Mapping UID for paperless to $usermap_new_uid"
	usermod --non-unique --uid "${usermap_new_uid}" paperless
else
	echo "${log_prefix} No UID changes for paperless"
fi

if [[ ${usermap_new_gid} != "${usermap_original_gid}" ]]; then
	echo "${log_prefix} Mapping GID for paperless to $usermap_new_gid"
	groupmod --non-unique --gid "${usermap_new_gid}" paperless
else
	echo "${log_prefix} No GID changes for paperless"
fi