# Nexus-Nano Inference - Fixed Build
# Ultra Lightweight

FROM python:3.10-slim

WORKDIR /app

# System dependencies
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 models folder BEFORE download
RUN mkdir -p /app/models

# Copy application
COPY app.py .

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

# Verify model exists
RUN ls -lh /app/models/ && \
    test -f /app/models/nexus_nano.onnx && \
    echo "✅ Model file verified" || \
    (echo "❌ Model file missing!" && exit 1)

EXPOSE 7860

ENV PYTHONUNBUFFERED=1
ENV OMP_NUM_THREADS=2

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

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