#!/bin/bash
# udt-homepage: stage the homepage stylesheet and wallpaper on the dashboard host.
# Copyright (C) 2026 Danilo M. <danix@danix.xyz>
# Licensed under the GNU General Public License v2 only.
#
# Staged, not installed: /opt/homepage is root-owned and this script does not
# hold root there, so it copies into ~/hp-stage/ and a notification carries
# the command that finishes the job.
#
# udt-accent starts this detached on every run, which covers both a wallpaper
# change (wallp) and a scheme switch (install.sh). Never slow and never loud
# when the host is away: a laptop off that network gets a short connect
# timeout and no notification, since there is nothing for the user to do.

repo="$(dirname "$(readlink -f "$0")")/.."
css="$repo/templates/homepage/custom.css"
wall="$HOME/.cache/udt/wpaper"
opts=(-q -o ConnectTimeout=5 -o BatchMode=yes)

[ -f "$css" ] && [ -e "$wall" ] || exit 0

# The wallpaper keeps its own extension, so settings.yaml has to follow it: the
# finish command rewrites its background.image line to match. The extension
# ends up in a command the user runs as root, so only known image types pass.
real="$(readlink -f "$wall")"
ext="${real##*.}"
ext="${ext,,}"
case "$ext" in
    png|jpg|jpeg|webp|gif|avif) ;;
    *) echo "homepage: $real is not a known image type, skipped" >&2; exit 1 ;;
esac
bg="background.$ext"

scp "${opts[@]}" "$css" homepage:hp-stage/custom.css &&
    scp "${opts[@]}" "$real" "homepage:hp-stage/$bg" || {
    echo "homepage: unreachable, skipped" >&2
    exit 1
}

# Root commands, not sudo: the login user there has no sudo rights. Root's ~
# is not the staging directory, so it is named through the ssh login user,
# which ssh -G resolves from the config without connecting.
stage="~$(ssh -G homepage 2>/dev/null | awk '/^user /{print $2}')/hp-stage"
finish="cp $stage/custom.css /opt/homepage/config/
cp $stage/$bg /opt/homepage/public/images/
sed -i 's|/images/background\.[a-z]*|/images/$bg|' /opt/homepage/config/settings.yaml
systemctl restart homepage"
echo "homepage: staged, finish as root on homepage:"
echo "$finish"
command -v notify-send >/dev/null 2>&1 &&
    notify-send -a udt "homepage: theme staged" "As root on homepage:
$finish"
exit 0