FROM ubuntu:24.04

ENV DEBIAN_FRONTEND=noninteractive
ENV APP_DIR=/opt/containers/nats-registration-listener
ENV DATA_DIR=${APP_DIR}/data
# venv path and ensure it’s first on PATH for runtime & build steps
ENV VENV_PATH=/opt/venv
ENV PATH=${VENV_PATH}/bin:${PATH}

# Minimal deps + Python + venv + dos2unix for CRLF→LF
RUN apt-get update && apt-get install -y --no-install-recommends \
      bash curl jq ca-certificates tini python3 python3-venv python3-pip dos2unix \
 && rm -rf /var/lib/apt/lists/*

# Create a virtual environment and install python deps inside it
RUN python3 -m venv ${VENV_PATH} \
 && python -m pip install --no-cache-dir --upgrade pip \
 && python -m pip install --no-cache-dir --upgrade nats-py

# App payload (immutable inside image)
RUN mkdir -p ${APP_DIR}/app/bin
COPY files/nats-registration-listener.sh ${APP_DIR}/app/bin/nats-registration-listener.sh
COPY files/entrypoint.sh /usr/local/bin/nats-registration-entrypoint
COPY files/healthcheck.sh /usr/local/bin/nats-registration-healthcheck
COPY files/nats_registration_listener.py /usr/local/bin/nats_registration_listener.py

# Normalize line endings & set exec bits (Windows-safe)
RUN dos2unix /usr/local/bin/nats-registration-entrypoint \
             /usr/local/bin/nats-registration-healthcheck \
             ${APP_DIR}/app/bin/nats-registration-listener.sh \
             /usr/local/bin/nats_registration_listener.py \
 && chmod +x /usr/local/bin/nats-registration-entrypoint \
             /usr/local/bin/nats-registration-healthcheck \
             ${APP_DIR}/app/bin/nats-registration-listener.sh

WORKDIR ${APP_DIR}/app

# Use tini as PID1; entrypoint validates env and execs the main script
ENTRYPOINT ["/usr/bin/tini", "--", "/usr/local/bin/nats-registration-entrypoint"]
CMD ["/opt/containers/nats-registration-listener/app/bin/nats-registration-listener.sh"]
