FROM python:3.11-slim

ENV PYTHONUNBUFFERED=1 \
    PIP_DISABLE_PIP_VERSION_CHECK=1 \
    PIP_NO_CACHE_DIR=1 \
    HF_HOME=/cache/huggingface \
    TORCH_HOME=/cache/torch \
    TRANSFORMERS_OFFLINE=0

WORKDIR /app

RUN apt-get update && apt-get install -y --no-install-recommends \
        build-essential git curl ca-certificates && \
    rm -rf /var/lib/apt/lists/*

COPY requirements.txt /app/requirements.txt
RUN pip install --extra-index-url https://download.pytorch.org/whl/cpu -r requirements.txt

COPY app.py /app/app.py

EXPOSE 8000

HEALTHCHECK --interval=30s --timeout=10s --start-period=120s --retries=3 \
  CMD curl -fsS http://127.0.0.1:8000/health || exit 1

CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "8000", "--workers", "1"]