#!/usr/bin/env bash

base_dir="$HOME/.config/systemd/user/"

_filename () {
	echo "autostart-$1.service"
}

_systemctl () {
	systemctl --user "${@:2}" "$(_filename "$1")"
}

_echo_table () {
	printf "Unit\tFilename\tEnabled\n"
	for unit in "$@"
	do
		printf "%s\t%s\t%s\n" \
			"$unit" \
			"$(_filename "$unit")" \
			"$(_systemctl "$unit" is-enabled)"
	done
}

_autostart_manage_add () {
	cat <<EOF >"$base_dir$(_filename "$1")"
[Unit]
Description=$1

[Service]
ExecStart=$2
EOF
}

_autostart_manage_list () {
	systemctl --user list-unit-files \
		| grep "autostart-" \
		| awk '{print $1}' \
		| sed -e 's/^autostart-//' -e 's/.service$//'
}

_autostart_manage_info () {
	mapfile -t autostart_units < <( _autostart_manage_list )
	_echo_table "${autostart_units[@]}" | column -t -s$'\t'
}

_autostart_manage_enable () {
	_systemctl "$1" add-wants autostart.target
}

_autostart_manage_disable () {
	_systemctl "$1" disable
}

_autostart_manage_rm () {
	rm "$base_dir$(_filename "$1")"
}

case $1 in
	list)		_autostart_manage_list ;;
	info)		_autostart_manage_info ;;
	add)		_autostart_manage_add "$2" "$3" ;;
	enable)		_autostart_manage_enable "$2" ;;
	disable)	_autostart_manage_disable "$2" ;;
	rm)			_autostart_manage_rm "$2" ;;
	*)			echo "'$1' is not valid" ;;
esac