# syntax=docker/dockerfile:1.6
FROM python:3.11-slim

# ---------------------------------------------------------------
# System setup
# ---------------------------------------------------------------
ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PIP_NO_CACHE_DIR=1 \
    PIP_DISABLE_PIP_VERSION_CHECK=1 \
    PORT=7860 \
    POLL_INTERVAL=10 \
    UPSTREAM_API=https://dooratre-db.hf.space

# Minimal build deps (eventlet/greenlet sometimes need them on slim)
RUN apt-get update && apt-get install -y --no-install-recommends \
        curl \
        build-essential \
    && rm -rf /var/lib/apt/lists/*

# ---------------------------------------------------------------
# Non-root user (HF Spaces friendly)
# ---------------------------------------------------------------
RUN useradd -m -u 1000 appuser
WORKDIR /app

# ---------------------------------------------------------------
# Python deps (cache layer)
# ---------------------------------------------------------------
COPY requirements.txt .
RUN pip install --upgrade pip && pip install -r requirements.txt

# ---------------------------------------------------------------
# App source
# ---------------------------------------------------------------
COPY --chown=appuser:appuser . .

USER appuser

EXPOSE 7860

HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
    CMD curl -fsS http://localhost:7860/health || exit 1

# ---------------------------------------------------------------
# Run with gunicorn + eventlet worker for Socket.IO
# ---------------------------------------------------------------
CMD ["gunicorn", \
     "-k", "eventlet", \
     "-w", "1", \
     "--bind", "0.0.0.0:7860", \
     "--access-logfile", "-", \
     "--error-logfile", "-", \
     "--timeout", "120", \
     "app:app"]