FROM python:3.12-slim

WORKDIR /app

RUN apt-get update && apt-get install -y --no-install-recommends \
    curl \
    && rm -rf /var/lib/apt/lists/*

COPY requirements.txt ./
RUN pip3 install --no-cache-dir -r requirements.txt

COPY src/ ./src/

EXPOSE 8501
ENV STREAMLIT_SERVER_PORT=8501 \
    STREAMLIT_SERVER_ADDRESS=0.0.0.0 \
    STREAMLIT_SERVER_ENABLE_CORS=false \
    STREAMLIT_BROWSER_GATHER_USAGE_STATS=false

# Generous start-period: on a free cpu-basic node Streamlit can take ~3 min to
# bind 8501 (cold import). Without --start-period the default probe marks the
# container UNHEALTHY after ~90 s (3×30 s) BEFORE the app is ready, and HF then
# refuses to promote it -> the Space hangs forever at APP_STARTING. 5 min grace
# (+ many retries) lets a slow cold start come up before health counts.
HEALTHCHECK --start-period=300s --interval=20s --timeout=5s --retries=10 \
  CMD curl --fail http://localhost:8501/_stcore/health || exit 1

ENTRYPOINT ["streamlit", "run", "src/streamlit_app.py", "--server.port=8501", "--server.address=0.0.0.0"]