ARG BASE_IMAGE=debian:trixie-slim
FROM ${BASE_IMAGE}

ARG DEBIAN_FRONTEND=noninteractive

# Keep the runtime image small: no recommends, docs, man pages or apt cache.
RUN printf '%s\n' \
      'path-exclude=/usr/share/doc/*' \
      'path-exclude=/usr/share/man/*' \
      'path-exclude=/usr/share/info/*' \
      'path-exclude=/usr/share/locale/*' \
      > /etc/dpkg/dpkg.cfg.d/01_nodoc \
    && apt-get update \
    && apt-get install -y --no-install-recommends \
       ca-certificates \
       iproute2 \
       passwd \
       python3 \
       suricata \
       suricata-update \
       tini \
    && if ! getent group suricata >/dev/null 2>&1; then groupadd --system suricata; fi \
    && if ! id -u suricata >/dev/null 2>&1; then useradd --system --gid suricata --home-dir /var/lib/suricata --no-create-home --shell /usr/sbin/nologin suricata; fi \
    && getent passwd suricata >/dev/null \
    && getent group suricata >/dev/null \
    && suricata --build-info >/dev/null \
    && suricata-update -V \
    && suricata-update update-sources \
    && suricata-update \
    && mkdir -p /opt/ids/vendor-rules-seed \
    && cp -a /var/lib/suricata/. /opt/ids/vendor-rules-seed/ \
    && apt-get clean \
    && rm -rf \
       /var/lib/apt/lists/* \
       /var/cache/apt/* \
       /usr/share/doc/* \
       /usr/share/man/* \
       /usr/share/info/* \
       /usr/share/locale/*

WORKDIR /opt/ids

COPY app /opt/ids/app
COPY scripts /opt/ids/scripts
COPY suricata /opt/ids/suricata

RUN chmod +x /opt/ids/scripts/*.sh \
    && mkdir -p /data /var/log/suricata /var/lib/suricata/rules /run/suricata /tmp/suricata-build-test \
    && suricata -T \
       -c /etc/suricata/suricata.yaml \
       -l /tmp/suricata-build-test \
       -s /opt/ids/suricata/local.rules \
       --set 'vars.address-groups.HOME_NET=[192.168.0.0/16,10.0.0.0/8,172.16.0.0/12]' \
    && rm -rf /tmp/suricata-build-test \
    && chown -R suricata:suricata /var/log/suricata /var/lib/suricata /run/suricata

ENV PYTHONUNBUFFERED=1 \
    TZSP_BIND=0.0.0.0 \
    TZSP_PORT=37008 \
    TAP_NAME=suritap0 \
    TAP_MTU=9000 \
    WEB_BIND=0.0.0.0 \
    WEB_PORT=8080 \
    DB_PATH=/data/ids.db \
    EVE_PATH=/var/log/suricata/eve.json \
    SURICATA_LOCAL_RULES=/data/suricata/local.rules \
    SURICATA_EXTRA_RULES_GLOB=/data/suricata/*.rules \
    SURICATA_CUSTOM_RULES=/data/suricata/custom.rules \
    SURICATA_THRESHOLD_CONFIG=/data/suricata/threshold.config \
    ALERT_MAX_SEVERITY=2 \
    ALERT_DEDUP_WINDOW_SECONDS=300 \
    ALERT_IGNORE_SIDS=1000001 \
    AUTO_BLOCK=false \
    UPDATE_RULES_ON_START=false \
    RULE_UPDATE_INTERVAL_HOURS=24

EXPOSE 37008/udp 8080/tcp

HEALTHCHECK --interval=30s --timeout=5s --start-period=20s --retries=3 CMD ["python3", "/opt/ids/scripts/healthcheck.py"]

ENTRYPOINT ["/usr/bin/tini", "--", "/opt/ids/scripts/entrypoint.sh"]