# Use official lightweight Python 3.12 runtime
FROM python:3.12-slim

# Prevent Python from writing .pyc files and enable unbuffered logging
ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PORT=7860

# Install minimal OS dependencies for PDF processing and math libraries
RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential \
    curl \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /app

# Install Python dependencies
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# Copy application source code
COPY . .

# Ensure storage directories exist
RUN mkdir -p data/uploads data/processed data/vectorstore

# Expose Hugging Face Space port
EXPOSE 7860

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