FROM python:3.11-slim

# System deps
RUN apt-get update && apt-get install -y --no-install-recommends \
    git \
    && rm -rf /var/lib/apt/lists/*

# Python deps
RUN pip install --no-cache-dir \
    fastapi>=0.110 \
    'uvicorn[standard]>=0.27' \
    pydantic>=2.0

# RungsX engine + parser (copied from Rungs_complete_code — both files are standalone stdlib only)
COPY cladder_solver.py /rungs/cladder_solver.py
COPY nl_dag_parser.py /rungs/nl_dag_parser.py
COPY __init__.py /rungs/__init__.py

# Stratum backend
COPY stratum_rungsx_backend.py /stratum_rungsx_backend.py

ENV RUNGSX_REPO=/rungs
ENV PYTHONUNBUFFERED=1

EXPOSE 7860

CMD ["python", "-u", "stratum_rungsx_backend.py", "--host", "0.0.0.0", "--port", "7860"]