#!/bin/bash
#
# sd-tool: Helper Tool for systemd
# Copyright (c)2023,2024 Alexander Barton (alex@barton.de)
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#

# Detect our "share" folder ...
unset SHARE_D
for d in . .. /usr/local /usr; do
	for s in share share/sd-tool; do
		if [[ -r "${d}/${s}/sd-tool-common.inc.sh" ]]; then
			SHARE_D="${d}/${s}"
			break
		fi
	done
	[[ -n "${SHARE_D}" ]] && break
done

if [[ -z "${SHARE_D}" || ! -d "${SHARE_D}" ]]; then
	echo "Oops, failed to detect \"share\" folder of $0! Aborting!" >&2
	exit 1
fi

# shellcheck source=../share/sd-tool-common.inc.sh
if ! . "${SHARE_D}/sd-tool-common.inc.sh"; then
	echo "Oops, failed to read \"${SHARE_D}/sd-tool-common.inc.sh\"! Aborting!" >&2
	exit 1
fi

# Try to handle a subcommand.
# NOTE: this function does NOT return!
handle_subcommand_and_quit() {
	cmd="$1"
	cmd_file="${SHARE_D}/sdt-cmd-${cmd}.inc.sh"
	shift
	if [[ -r "${cmd_file}" ]]; then
		# shellcheck source=../share/sd-tool-common.inc.sh
		if ! . "${cmd_file}"; then
			printf "Oops, failed to read \"%s\"! Aborting!\n" "${cmd_file}" >&2
			exit 1
		fi
		# Call command:
		sdt_cmd_"${cmd}" "$@"
		exit $?
	else
		if [[ -n "${cmd}" ]]; then
			printf "Unknown subcommand \"%s\"! Available commands are:\n\n" "${cmd}" >&2
		else
			printf "No subcommand given! Available commands are:\n\n" >&2
		fi
		sdt_commands
		exit 2
	fi
}

while true; do
	case "$1" in
		"--help")
			sdt_version
			sdt_usage
			exit 0
			;;
		"--quiet"|"-q")
			unset VERBOSE
			export QUIET=1
			;;
		"--verbose"|"-v")
			unset QUIET
			export VERBOSE=1
			;;
		"--version"|"-V")
			sdt_version
			exit 0
			;;
		"-*")
			printf "Unknown option \"%s\"!\n" "$1" >&2
			exit 2
			;;
		*)
			# Subcommand?
			handle_subcommand_and_quit "$@"
	esac
	shift
done
exit 1