_add_pipewire_camera() {
    local conf="$1"
    if [ -f "$conf" ] && grep -q 'enable-features=' "$conf" && ! grep -q 'PipeWireCamera' "$conf"; then
        sed -i 's/--enable-features=\([^ ]*\)/--enable-features=\1,PipeWireCamera/' "$conf"
    fi
}

_remove_pipewire_camera() {
    local conf="$1"
    [ -f "$conf" ] && sed -i 's/,PipeWireCamera//g' "$conf"
}

post_install() {
    systemctl daemon-reload
    systemctl enable camera-init.service
    udevadm control --reload-rules 2>/dev/null || true

    if [ -n "$SUDO_USER" ]; then
        usermod -aG video "$SUDO_USER" 2>/dev/null || true
        su - "$SUDO_USER" -c "systemctl --user daemon-reload; systemctl --user enable camera-feed-watch.service" 2>/dev/null || true

        _add_pipewire_camera "/home/$SUDO_USER/.config/chromium-flags.conf"
        _add_pipewire_camera "/home/$SUDO_USER/.config/brave-flags.conf"
    fi
}

post_upgrade() {
    systemctl daemon-reload
    udevadm control --reload-rules 2>/dev/null || true
}

pre_remove() {
    systemctl disable camera-init.service 2>/dev/null || true
    systemctl stop camera-init.service 2>/dev/null || true

    if [ -n "$SUDO_USER" ]; then
        su - "$SUDO_USER" -c "systemctl --user stop camera-feed-watch.service; systemctl --user disable camera-feed-watch.service" 2>/dev/null || true

        _remove_pipewire_camera "/home/$SUDO_USER/.config/chromium-flags.conf"
        _remove_pipewire_camera "/home/$SUDO_USER/.config/brave-flags.conf"
    fi
}

post_remove() {
    systemctl daemon-reload
    udevadm control --reload-rules 2>/dev/null || true
}