# ========================================
# 多阶段构建：Python微服务
# ========================================

# -------------------- 阶段1: 构建阶段 --------------------
FROM python:3-slim AS builder

# 设置工作目录
WORKDIR /app

# 替换为阿里云镜像源（为将来可能的构建依赖做准备）
RUN sed -i 's|http://deb.debian.org|http://mirrors.aliyun.com|g' /etc/apt/sources.list.d/debian.sources \
    && sed -i 's|http://security.debian.org|http://mirrors.aliyun.com|g' /etc/apt/sources.list.d/debian.sources

# 复制依赖文件
COPY requirements-prod.txt .

# 安装Python依赖到临时目录（使用预编译wheel，无需编译依赖）
RUN pip install --no-cache-dir --user -r requirements-prod.txt

# -------------------- 阶段2: 运行阶段 --------------------
FROM python:3-slim

# 设置工作目录
WORKDIR /app

# 替换为阿里云镜像源并安装运行时依赖
RUN sed -i 's|http://deb.debian.org|http://mirrors.aliyun.com|g' /etc/apt/sources.list.d/debian.sources \
    && sed -i 's|http://security.debian.org|http://mirrors.aliyun.com|g' /etc/apt/sources.list.d/debian.sources \
    && apt-get update \
    && apt-get install -y --no-install-recommends \
        libgl1 \
        libglib2.0-0 \
        libgomp1 \
    && rm -rf /var/lib/apt/lists/*

# 从构建阶段复制Python包
COPY --from=builder /root/.local /root/.local

# 复制应用代码
COPY . .

# 设置Python路径
ENV PATH=/root/.local/bin:$PATH
ENV PYTHONUNBUFFERED=1

# 暴露端口
EXPOSE 8000

# 健康检查
HEALTHCHECK --interval=30s --timeout=10s --start-period=40s --retries=3 \
    CMD python -c "import requests; requests.get('http://localhost:8000/api/health', timeout=5)"

# 启动命令
CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8000", "--workers", "2"]