#!/bin/sh
set -eu

usage() {
	cat <<-'EOF'
		Usage:
		  reconfigure
		  reconfigure -h
	EOF
}

help() {
	cat <<-'EOF'

		Options:
		  -h, --help    show this message


		Switches the system:
		- reconfigure the Guix "home" environment;
		- Guix "system" if it exists;
		- NixOS if it exists.


		Examples:

		  Just use it:

		    $ reconfigure
	EOF
}


for flag in "$@"; do
	case "$flag" in
		--)
			break
			;;
		--help)
			usage
			help
			exit
			;;
		*)
			;;
	esac
done

while getopts 'h' flag; do
	case "$flag" in
		h)
			usage
			help
			exit
			;;
		*)
			usage >&2
			exit 2
			;;
	esac
done
shift $((OPTIND - 1))


HOSTNAME="$(hostname)"

if [ -e /run/current-system/configuration.scm ]; then
	pass show "$(hostname)"/andreh |
		head -n1 |
		sudo -ES guix system -v3 reconfigure /run/current-system/configuration.scm
fi

TWO_HOURS='7200'

timeout "$TWO_HOURS" \
	guix home -v3 reconfigure ~/.guix-home/configuration.scm

if [ -e /etc/nixos/configuration.nix ]; then
	pass show "$HOSTNAME"/andreh |
		head -n1 |
		sudo -S nixos-rebuild switch --upgrade
fi