FROM python:3.11-slim

WORKDIR /app

# libgomp1: required by PyTorch/sentence-transformers
RUN apt-get update && apt-get install -y --no-install-recommends libgomp1 && rm -rf /var/lib/apt/lists/*

# Install CPU-only PyTorch first to avoid downloading 2GB CUDA build
RUN pip install --no-cache-dir torch --index-url https://download.pytorch.org/whl/cpu

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

# ── Application code ───────────────────────────────────────────────────────────
COPY app.py .

# HF Spaces requires a non-root user with UID 1000
RUN useradd -m -u 1000 appuser && chown -R appuser /app
USER appuser

EXPOSE 7860

CMD ["python3", "-m", "uvicorn", "app:app", "--host", "0.0.0.0", "--port", "7860", "--log-level", "info"]