# Nexus-Nano Inference Engine
# Ultra-lightweight and fast (11MB model)

FROM python:3.10-slim

WORKDIR /app

# System dependencies (minimal)
RUN apt-get update && apt-get install -y \
    curl \
    && rm -rf /var/lib/apt/lists/*

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

# Create directories
RUN mkdir -p /app/models /app/engine /app/utils

# Copy code
COPY app.py .
COPY engine/ ./engine/
COPY utils/ ./utils/

# Download Nexus-Nano model (11MB)
RUN python -c "from huggingface_hub import hf_hub_download; \
    hf_hub_download( \
        repo_id='GambitFlow/Nexus-Nano', \
        filename='nexus_nano.onnx', \
        local_dir='/app/models', \
        local_dir_use_symlinks=False \
    )"

# Verify
RUN ls -lh /app/models/nexus_nano.onnx

# Expose
EXPOSE 7860

# CPU optimization (single-threaded for speed)
ENV PYTHONUNBUFFERED=1
ENV OMP_NUM_THREADS=1
ENV MKL_NUM_THREADS=1

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
    CMD curl -f http://localhost:7860/health || exit 1

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