#!/usr/bin/env python3
# -*- coding: UTF-8 -*-
# Auto-generated from template. DO NOT EDIT DIRECTLY!
# Device: {device_name} ({device_id})

import time
import logging
import os
import socket
import sys

# ====== 配置参数（从配置文件读取）======
TARGET_IP = '{tms_server_ip}'
TARGET_PORT = {listen_port}
LOG_FILE = '{base_dir}/log/crond-{device_id}.log'
RESTART_COMMAND = "{python_path} {base_dir}/bin/{device_id}.py &"
DEVICE_ID = '{device_id}'
# =========================

ISOTIMEFORMAT = '%Y-%m-%d %X'

logging.basicConfig(filename=LOG_FILE, filemode="a", level=logging.DEBUG,
                    format='%(asctime)s - %(levelname)s - %(message)s', datefmt=ISOTIMEFORMAT)


def is_port_open(ip, port):
    """检查指定IP和端口是否可达"""
    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    s.settimeout(1)
    try:
        logging.debug(f"尝试连接到 {{ip}}:{{port}}...")
        s.connect((ip, int(port)))
        s.shutdown(socket.SHUT_RDWR)
        print(f"[{{DEVICE_ID}}] 端口 {{port}} is open")
        logging.info(f"端口 {{port}} is open")
        return True
    except (OSError, socket.timeout) as e:
        print(f"[{{DEVICE_ID}}] 端口 {{port}} is down")
        logging.warning(f"端口 {{port}} 检查失败: {{e}}，尝试重启程序")
        logging.info(f"执行重启命令: {{RESTART_COMMAND}}")
        os.system(RESTART_COMMAND)
        return False
    except ValueError:
        print(f"错误: 端口 '{{port}}' 不是有效的数字。")
        logging.error(f"端口 '{{port}}' 不是有效的数字。")
        return False
    finally:
        s.close()


if __name__ == '__main__':
    logging.info(f"[{{DEVICE_ID}}] 启动端口检查程序，检查 {{TARGET_IP}}:{{TARGET_PORT}}")
    print(f"[{{DEVICE_ID}}] 启动端口检查程序，检查 {{TARGET_IP}}:{{TARGET_PORT}}")
    is_port_open(TARGET_IP, TARGET_PORT)