# Use Python 3.9 slim image for efficiency
FROM python:3.9-slim

# Install build dependencies needed for ML packages (chromadb, sentence-transformers, blis)
RUN apt-get update && apt-get install -y \
    build-essential \
    python3-dev \
    gcc \
    g++ \
    libc6-dev \
    libffi-dev \
    libssl-dev \
    && rm -rf /var/lib/apt/lists/*

# Create a non-root user for security
RUN useradd -m -u 1000 user
USER user

# Set environment variables
ENV PATH="/home/user/.local/bin:$PATH"
ENV PYTHONPATH="/app:$PYTHONPATH"

# Set working directory
WORKDIR /app

# Copy requirements file with proper ownership
COPY --chown=user requirements.txt requirements.txt

# Install Python dependencies with better wheel support
RUN pip install --no-cache-dir --upgrade pip setuptools wheel && \
    pip install --no-cache-dir --prefer-binary --upgrade -r requirements.txt

# Copy application code
COPY --chown=user app.py /app/
COPY --chown=user . /app/

# Expose port 7860 for Hugging Face Spaces
EXPOSE 7860

# Command to run the application
CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "7860"]