FROM python:3.11-slim

# Set environment variables
ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1
ENV HOME=/home/user

# Create a non-root user for Hugging Face
RUN useradd -m -u 1000 user
WORKDIR $HOME/app

# Pre-create data directories with correct ownership
RUN mkdir -p $HOME/app/data/index $HOME/app/data/sessions && \
    chown -R user:user $HOME/app

# Switch to non-root user
USER user
ENV PATH=$HOME/.local/bin:$PATH

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

# Copy application code
COPY --chown=user . .

# Expose port
EXPOSE 7860

# Start application
CMD ["python", "-m", "uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "7860", "--workers", "1"]