post_install() {
    systemctl --global enable turnupd.service
    echo "turnupd: service enabled for all users — it will start on next login."
    echo "To start it now: systemctl --user start turnupd.service"
}

post_upgrade() {
    systemctl --global reenable turnupd.service
    # Restart for all currently logged-in users
    while read -r uid _; do
        systemctl -M "${uid}@.host" --user restart turnupd.service 2>/dev/null || true
    done < <(loginctl list-users --no-legend 2>/dev/null)
}

pre_remove() {
    # Stop and disable for all currently logged-in users
    while read -r uid _; do
        systemctl -M "${uid}@.host" --user stop    turnupd.service 2>/dev/null || true
        systemctl -M "${uid}@.host" --user disable turnupd.service 2>/dev/null || true
    done < <(loginctl list-users --no-legend 2>/dev/null)

    # Remove the global enable symlink
    # (/etc/systemd/user/default.target.wants/turnupd.service)
    systemctl --global disable turnupd.service 2>/dev/null || true
}