FROM python:3.11-slim

# Set working directory
WORKDIR /app

# Copy project files
COPY . /app

# Install system dependencies (faiss requires libopenblas)
RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential \
    libopenblas-dev \
    && rm -rf /var/lib/apt/lists/*

# Pin numpy version before other deps to avoid faiss compatibility issues
RUN pip install --no-cache-dir numpy==1.26.4

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

# Expose port (HF Spaces provides $PORT env variable)
EXPOSE $PORT

# Command to run FastAPI with uvicorn
CMD ["sh", "-c", "uvicorn main:app --host 0.0.0.0 --port ${PORT:-7860}"]