FROM python:3.12-slim

# OpenCV runtime libraries
RUN apt-get update && apt-get install -y --no-install-recommends \
    libgl1 libglib2.0-0 && \
    rm -rf /var/lib/apt/lists/*

WORKDIR /app

COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

COPY entropy.py health.py api.py ./

ENV ENTROPY_BITS=256 \
    ENTROPY_INTERVAL=1.0 \
    ENTROPY_API_KEY="" \
    UVICORN_HOST=0.0.0.0 \
    UVICORN_PORT=8000

EXPOSE 8000

HEALTHCHECK --interval=10s --timeout=3s --start-period=15s --retries=3 \
    CMD python3 -c "import urllib.request,sys; urllib.request.urlopen('http://localhost:8000/healthz').read(); sys.exit(0)" || exit 1

CMD ["sh", "-c", "uvicorn api:app --host ${UVICORN_HOST} --port ${UVICORN_PORT}"]