#!/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 .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:-$HOME/.config}/systemd/user"
env="$dir/.env"

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

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