FROM python:3.10-slim

WORKDIR /app

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

# Copy and install requirements
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# Download NLTK data
RUN python -m nltk.downloader punkt punkt_tab

# Copy application
COPY . .

# Hugging Face Spaces expects port 7860
EXPOSE 7860

# Start on port 7860 (HF Spaces standard)
CMD ["gunicorn", "app:app", "--bind", "0.0.0.0:7860", "--timeout", "120", "--workers", "1", "--threads", "4", "--worker-class", "gthread", "--log-level", "info", "--access-logfile", "-"]