FROM python:3.11-slim

WORKDIR /app

# Install deps first (cached layer — only invalidated when requirements change)
COPY requirements-server.txt .
RUN pip install --no-cache-dir \
    torch torchvision torchaudio --index-url https://download.pytorch.org/whl/cu121 && \
    pip install --no-cache-dir -r requirements-server.txt

# Copy source (excludes venv/, training/, assets/, .git/ via .dockerignore)
COPY . .

# Pre-generate facts.json at build time; falls back gracefully if network is down
RUN python -m data.loader || echo "facts.json generation skipped — will use fallback facts"

EXPOSE 7860

# One worker so the optional trained-model adapter is loaded at most once.
CMD ["uvicorn", "environment.server:app", "--host", "0.0.0.0", "--port", "7860", "--workers", "1"]