FROM python:3.11-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 caching
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# Copy application code
COPY . .

# Create data directories
RUN mkdir -p data/embeddings data/outputs data/uploads

# Expose port 7860 (HuggingFace default)
EXPOSE 7860

# Run with gunicorn (1 worker to save memory, 180s timeout for LLM calls)
CMD ["gunicorn", "--bind", "0.0.0.0:7860", "--workers", "1", "--timeout", "180", "app:app"]