#!/usr/bin/env sh
# Install the 30-minute HedgeDoc refresh and the daily 04:00 challs.txt commit
# as systemd *user* units.
# Run it as the user that owns ctf_status.env / .env, on the machine that should do the
# polling. Re-running it is safe; it just overwrites the units.
set -eu

dir=$(CDPATH= cd -- "$(dirname -- "$0")" && pwd -P)
units="${XDG_CONFIG_HOME:-$HOME/.config}/systemd/user"

[ -x "$dir/ctf_status.py" ] || { echo "no executable ctf_status.py in $dir" >&2; exit 1; }
# ctf_status.py reads ctf_status.env and .env; either (or both) will do
set --
for f in "$dir/ctf_status.env" "$dir/.env"; do
    if [ -f "$f" ]; then set -- "$@" "$f"; fi
done
[ $# -gt 0 ] || {
    echo "no ctf_status.env or .env in $dir — copy ctf_status.env.example to one first" >&2
    exit 1; }
# the timers run --update and --challs, which need these two
for key in HEDGEDOC_NOTE CHALLS_REPO_URL; do
    grep -qi "^$key=..*" "$@" || { echo "set $key=... in $* first" >&2; exit 1; }
done
chmod 600 "$@"

mkdir -p "$units"
for u in ctf-status.service ctf-status.timer ctf-challs.service ctf-challs.timer; do
    sed "s|__DIR__|$dir|g" "$dir/$u" > "$units/$u"
    echo "installed $units/$u"
done

systemctl --user daemon-reload
systemctl --user enable --now ctf-status.timer ctf-challs.timer

# without lingering, user units are torn down as soon as you log out
if ! loginctl show-user "$(id -un)" -p Linger --value 2>/dev/null | grep -qx yes; then
    loginctl enable-linger "$(id -un)" 2>/dev/null \
        || echo "could not enable linger; run: sudo loginctl enable-linger $(id -un)" >&2
fi

echo
echo "one run of each now, to prove they work:"
systemctl --user start ctf-status.service ctf-challs.service && echo "  ok"
systemctl --user list-timers ctf-status.timer ctf-challs.timer --no-pager