FROM python:3.12-slim

WORKDIR /app

# Install dependencies first (layer caching)
# Use slim requirements (no torch/chronos/streamlit — not needed at API runtime)
COPY backend/requirements-docker.txt backend/
COPY backend/requirements.txt backend/
RUN pip install --no-cache-dir -r backend/requirements-docker.txt -r backend/requirements.txt

# Non-root user for security
RUN groupadd -r solarwine && useradd -r -g solarwine solarwine

# Copy application code and data cache
COPY src/ src/
COPY config/ config/
COPY backend/ backend/
COPY Data/ Data/

ENV PYTHONPATH=/app

# Switch to non-root
USER solarwine

# HuggingFace Spaces requires port 7860
EXPOSE 7860
HEALTHCHECK --interval=30s --timeout=5s --retries=3 \
    CMD python -c "import urllib.request; urllib.request.urlopen('http://localhost:7860/api/health')" || exit 1
CMD ["uvicorn", "backend.api.main:app", "--host", "0.0.0.0", "--port", "7860"]