FROM python:3.12-slim

WORKDIR /app

# Install system deps for underthesea / numpy
RUN apt-get update && \
    apt-get install -y --no-install-recommends gcc g++ && \
    rm -rf /var/lib/apt/lists/*

COPY pyproject.toml .
RUN pip install --no-cache-dir . 2>/dev/null || pip install --no-cache-dir \
    "fastapi>=0.115.0" \
    "uvicorn[standard]>=0.32.0" \
    "xgboost>=2.1.0" \
    "numpy>=1.26.0" \
    "underthesea>=6.8.0" \
    "pydantic>=2.9.0" \
    "pydantic-settings>=2.5.0" \
    "httpx>=0.27.0"

COPY app/ ./app/

# Pre-download underthesea models at build time
RUN python -c "from underthesea import word_tokenize; word_tokenize('test')" 2>/dev/null || true

EXPOSE 8000

HEALTHCHECK --interval=30s --timeout=5s --start-period=15s --retries=3 \
    CMD python -c "import httpx; httpx.get('http://localhost:8000/health').raise_for_status()"

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