package main

import (
	"flag"
	"fmt"
	"os"
	"strconv"
)

func main() {
	port := flag.Int("port", 8080, "服务端口")
	host := flag.String("host", "localhost", "服务绑定主机")

	flag.Parse()

	// 环境变量仅覆盖未手动传参的配置
	if !flag.IsSet("port") {
		if envPort := os.Getenv("SERVICE_PORT"); envPort != "" {
			if p, err := strconv.Atoi(envPort); err == nil {
				*port = p
			}
		}
	}

	if !flag.IsSet("host") {
		if envHost := os.Getenv("SERVICE_HOST"); envHost != "" {
			*host = envHost
		}
	}

	fmt.Printf("最终生效配置：主机=%s，端口=%d\n", *host, *port)
}