#!/bin/bash
# desktop-assistant tool: read or set a desktop mode.
# Copyright (C) 2026 Danilo M. <danix@danix.xyz>
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License version 2 as published
# by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
# Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
# mode.sh <mode> [0|1]: the desktop modes in the status registry
# (statusctl, quickshell repo). Empty second argument only reads. Check:
# test-mode.sh.

set -uo pipefail

mode=${1:-}
on=${2:-}

case "$on" in
    "") ;;
    0|1) statusctl "$mode" set "$on" || exit 1 ;;
    *) echo "on must be 1, 0 or empty, not: $on" >&2; exit 1 ;;
esac

# Read back rather than echo the request: a set that did not land must not
# be reported as done. An unknown mode fails here, in statusctl.
v=$(statusctl "$mode" get) || exit 1
[ "$v" = 1 ] && s=on || s=off

# statusctl get reads only the manual half of presentation; a running game
# holds it on regardless (see statusctl's gaming_on).
# Guarded on existence: 2>/dev/null cannot silence a failed input redirect.
gf="${XDG_RUNTIME_DIR:-/tmp}/status.gaming"
g=""
[ -e "$gf" ] && g=$(tr -d '[:space:]' < "$gf" 2>/dev/null)
if [ "$mode" = presentation ] && [ "$g" = 1 ]; then
    echo "presentation: on (held on by a running game; manual setting $s)"
else
    echo "$mode: $s"
fi