# Pin Python 3.11 — pydantic 2.4 and transformers 4.33 don't ship wheels for 3.13,
# and the HF build image has no Rust toolchain to compile them from source.
FROM python:3.11-slim

WORKDIR /app

# System deps needed by sentence-transformers / chromadb at runtime
RUN apt-get update && apt-get install -y --no-install-recommends \
        build-essential \
    && rm -rf /var/lib/apt/lists/*

# Install Python deps first so layer caches well
COPY requirements.txt .
RUN pip install --no-cache-dir --upgrade pip \
    && pip install --no-cache-dir -r requirements.txt

# Copy application code
COPY . .

# HF Spaces injects PORT=7860 by default; we honor it in app.py.
ENV PYTHONUNBUFFERED=1 \
    PORT=7860 \
    CORS_ALLOWED_ORIGINS="*"

EXPOSE 7860

# app.py reads PORT and starts uvicorn on 0.0.0.0
CMD ["python", "app.py"]