#!/bin/bash
# SPDX-License-Identifier: Apache-2.0
# Server container entrypoint: installs nginx + module, waits for
# containerlab to create data-plane interfaces, starts the slow
# Python backend, and runs nginx in the foreground.

# Suppress automatic service start/restart during apt/dpkg.
printf '#!/bin/sh\nexit 101\n' > /usr/sbin/policy-rc.d
chmod +x /usr/sbin/policy-rc.d

apt-get update -qq
apt-get install -y -qq nginx python3 procps iproute2 ncat > /dev/null 2>&1

# Install the module .deb built by `make pkg-deb`.
dpkg -i /opt/build/libnginx-mod-http-ipng-stats_*.deb 2>/dev/null || true

# Re-enable module symlink in case postinst disabled it.
ln -sf /etc/nginx/modules-available/50-mod-http-ipng-stats.conf \
       /etc/nginx/modules-enabled/50-mod-http-ipng-stats.conf

# Remove the policy block now that packages are installed.
rm -f /usr/sbin/policy-rc.d

# Wait for containerlab to attach the data-plane veth pairs.
for iface in eth1 eth2; do
    echo "Waiting for $iface ..."
    while ! ip link show "$iface" > /dev/null 2>&1; do
        sleep 0.2
    done
    ip link set "$iface" up
done

ip addr add 10.0.1.1/24 dev eth1
ip addr add 10.0.2.1/24 dev eth2
ip -6 addr add 2001:db8:1::1/64 dev eth1 nodad
ip -6 addr add 2001:db8:2::1/64 dev eth2 nodad

# Slow backend: 50 ms sleep per request.
python3 /opt/config/slow-backend.py &

# UDP logtail listener — captures datagrams to a file for test validation.
ncat -u -l -k 127.0.0.1 9514 --recv-only >> /var/log/nginx/logtail-udp.log &

exec nginx -g 'daemon off;' -c /opt/config/nginx.conf