FROM python:3.11-slim

WORKDIR /app

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

# 安装 gunicorn 用于生产环境运行 Flask
RUN pip install --no-cache-dir gunicorn

COPY . .

EXPOSE 8888

CMD [
    "gunicorn",
    "-w", "4",                # Worker数（建议 2*CPU核心+1，根据服务器调整）
    "-b", "0.0.0.0:8888",     # 绑定地址和端口
    "--timeout", "300",       # Worker超时时间（解决超时被杀死）
    "--graceful-timeout", "300",  # 优雅重启超时
    "--worker-class", "gevent",   # 异步worker（适合长任务/高并发，减少阻塞）
    "--worker-connections", "1000",  # 每个worker最大连接数
    "--access-logfile", "-",        # 访问日志输出到stdout（Docker可捕获）
    "--error-logfile", "-",         # 错误日志输出到stdout
    "--log-level", "info",          # 日志级别，方便排查问题
    "app:app"
]