FROM python:3.10-slim

WORKDIR /app

# Install system dependencies for PyMuPDF and other packages
RUN apt-get update && apt-get install -y \
    build-essential \
    libffi-dev \
    && rm -rf /var/lib/apt/lists/*

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

# Copy application code
COPY . .

# Create necessary directories
RUN mkdir -p uploads chroma_data

# Hugging Face Spaces uses port 7860
EXPOSE 7860

# Set environment variables
ENV FLASK_ENV=production
ENV PYTHONUNBUFFERED=1

# Run with gunicorn for production
CMD ["gunicorn", "--bind", "0.0.0.0:7860", "--worker-class", "gthread", "--threads", "4", "--workers", "2", "--timeout", "1200", "--access-logfile", "-", "--error-logfile", "-", "app:app"]