FROM python:3.9-slim

WORKDIR /app

# Install system dependencies
RUN apt-get update && apt-get install -y \
    build-essential \
    && rm -rf /var/lib/apt/lists/*

# Copy requirements first for better caching
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# Download NLTK data
RUN python -c "import nltk; nltk.download('punkt'); nltk.download('punkt_tab')"

# Copy application files
COPY app.py .
COPY templates/ templates/
COPY models/ models/

# Expose port 7860 (Hugging Face default)
EXPOSE 7860

# Set environment variable
ENV PORT=7860

# Run the application
CMD ["python", "app.py"]