FROM python:3.11-slim

ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PIP_NO_CACHE_DIR=1 \
    HF_HOME=/app/.cache/huggingface

RUN apt-get update && apt-get install -y --no-install-recommends \
    libgl1 \
    libglib2.0-0 \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /app

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

COPY model_core.py app.py gradio_app.py .

# Pre-download weights at build time so cold starts are faster.
RUN python -c "from huggingface_hub import hf_hub_download; hf_hub_download('jc-builds/CalorieCLIP', 'calorie_clip.pt')"

EXPOSE 8000

HEALTHCHECK --interval=30s --timeout=5s --start-period=120s --retries=3 \
  CMD python -c "import urllib.request; urllib.request.urlopen('http://127.0.0.1:8000/health')"

CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "8000"]