FROM python:3.12-slim

ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    APP_PORT=7860 \
    DATA_DIR=/data \
    LOG_LEVEL=INFO \
    LOG_FORMAT=json

WORKDIR /app

COPY requirements.txt ./
RUN pip install --no-cache-dir -r requirements.txt

COPY server.py ./
COPY app ./app
COPY knowledge ./knowledge

RUN mkdir -p /data/logs /data/backups && \
    useradd --create-home --uid 1000 appuser && \
    chown -R appuser:appuser /app /data

USER appuser

EXPOSE 7860

HEALTHCHECK --interval=30s --timeout=5s --start-period=20s --retries=3 \
  CMD python -c "import urllib.request; urllib.request.urlopen('http://127.0.0.1:7860/health/ready', timeout=3).read()" || exit 1

CMD ["python", "server.py"]