FROM python:3.10-slim

# Create a non-root user (required by Hugging Face Spaces)
RUN useradd -m -u 1000 user
USER user
ENV HOME=/home/user \
    PATH=/home/user/.local/bin:$PATH

WORKDIR /home/user/app

# Install dependencies
COPY --chown=user requirements.txt ./requirements.txt
RUN pip install --no-cache-dir -r requirements.txt

# Download NLTK data required by feature_extraction.py
RUN python -c "import nltk; nltk.download('punkt'); nltk.download('stopwords'); nltk.download('wordnet'); nltk.download('punkt_tab')"

# Copy application files
COPY --chown=user . ./

# Hugging Face Spaces exposes port 7860
EXPOSE 7860
ENV PORT=7860

# Run with gunicorn for production
CMD ["gunicorn", "--bind", "0.0.0.0:7860", "--workers", "1", "--timeout", "300", "app:app"]