package main

import (
	"fmt"
	"github.com/gin-gonic/gin"
	"github.com/nacos-group/nacos-sdk-go/clients"
	"github.com/nacos-group/nacos-sdk-go/common/constant"
	"github.com/nacos-group/nacos-sdk-go/vo"
	"log"
	"net"
	"net/http"
	"os"
	"strconv"
	"strings"
)

var port = "8888"

func initNacos() {
	sc := []constant.ServerConfig{
		*constant.NewServerConfig("nacos", 8848),
	}
	cc := constant.ClientConfig{
		AppName:             "api1",
		NamespaceId:         "", //namespace id
		TimeoutMs:           5000,
		NotLoadCacheAtStart: true,
		RotateTime:          "1h",
		MaxAge:              3,
		LogLevel:            "debug",
	}

	configParam := vo.NacosClientParam{
		ClientConfig:  &cc,
		ServerConfigs: sc,
	}

	client, err := clients.NewNamingClient(configParam)

	if err != nil {
		panic(err)
	}
	portNum, _ := strconv.Atoi(port)
	pp := uint64(portNum)
	ip := "api-demo"
	if ips := getIps(); ips != nil {
		ip = ips[0]
	}

	success, err := client.RegisterInstance(vo.RegisterInstanceParam{
		Ip:          ip,
		Port:        pp,
		Weight:      10,
		Enable:      true,
		Healthy:     true,
		ServiceName: "api1",
		Ephemeral:   true,
	})
	log.Println("Nacos注册结果: ", success)
	if err != nil {
		log.Println("Nacos注册错误信息: ", err.Error())
	}

	configClient, err := clients.NewConfigClient(configParam)
	if err != nil {
		log.Fatalf("创建配置连接失败: %v", err.Error())
	}
	_ = configClient.ListenConfig(vo.ConfigParam{
		DataId: "api.yml",
		Group:  "DEFAULT_GROUP",
		OnChange: func(namespace, group, dataId, data string) {
			fmt.Println("监控到配置文件变动: group:" + group + ", dataId:" + dataId + ", data:" + data)
		},
	})
	//log.Println("监听配置失败: ", err.Error())
}

func getIps() []string {
	addrs, err := net.InterfaceAddrs()
	if err != nil {
		return nil
	}
	var ips []string
	for _, address := range addrs {
		// 检查ip地址判断是否回环地址
		if ipnet, ok := address.(*net.IPNet); ok && !ipnet.IP.IsLoopback() {
			if ipnet.IP.To4() != nil {
				ip := ipnet.IP.String()
				fmt.Println(ip)
				ips = append(ips, ip)
			}
		}
	}
	//ipStr := strings.Join(aaaa, ",")
	return ips
}

func main() {
	args := os.Args
	if len(args) > 1 {
		port = args[1]
	}
	app := gin.Default()
	initNacos()

	app.GET("/hello", func(context *gin.Context) {
		context.String(http.StatusOK, "[GET]-[API]-v1"+port)
	})

	app.POST("/hello", func(context *gin.Context) {
		context.String(http.StatusOK, "[POST]-[API]-v1"+port)
	})

	app.GET("/ip", func(context *gin.Context) {
		context.String(http.StatusOK, strings.Join(getIps(), ","))
	})
	app.Run(fmt.Sprintf(":%v", port))
}