FROM python:3.9

# Create non-root user
RUN useradd -m -u 1000 user
USER user

# Set environment variables
ENV PATH="/home/user/.local/bin:$PATH"
ENV NLTK_DATA="/home/user/nltk_data"

# Set working directory
WORKDIR /app

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

# Prepare NLTK data directory and download punkt
RUN mkdir -p $NLTK_DATA
COPY --chown=user download_nltk_data.py .
RUN python download_nltk_data.py && rm download_nltk_data.py

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

# Run the app
CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "7860"]