FROM python:3.9-slim

WORKDIR /app

ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PIP_DISABLE_PIP_VERSION_CHECK=1

# 构建阶段 PyPI 镜像（阿里云）；可 docker build --build-arg 覆盖
ARG PIP_INDEX_URL=https://mirrors.aliyun.com/pypi/simple/
ARG PIP_TRUSTED_HOST=mirrors.aliyun.com

COPY requirements.txt .

RUN --mount=type=cache,id=zkxw-pip,target=/root/.cache/pip \
    pip install --upgrade pip setuptools wheel \
    --default-timeout=300 --retries 10 \
    -i "${PIP_INDEX_URL}" --trusted-host "${PIP_TRUSTED_HOST}" \
    && pip install --default-timeout=300 --retries 10 \
    -i "${PIP_INDEX_URL}" --trusted-host "${PIP_TRUSTED_HOST}" \
    -r requirements.txt

COPY app ./app

EXPOSE 8111

HEALTHCHECK --interval=30s --timeout=5s --start-period=40s --retries=3 \
    CMD python -c "import urllib.request; urllib.request.urlopen('http://127.0.0.1:8111/health')" || exit 1

CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8111", "--workers", "2"]