package pkg

import (
	"encoding/json"
	"fmt"
	"io/ioutil"
	"log"
	"net"
	"net/http"
)

// 获取外网ip地址
func GetLocation(ip, key string) string {
	if ip == "127.0.0.1" || ip == "localhost" {
		return "内部IP"
	}
	// 若用户不填写IP，则取客户HTTP之中的请求来进行定位
	url := "https://restapi.amap.com/v3/ip?key=" + key
	log.Println("restapi.amap.com url", url)
	resp, err := http.Get(url)
	if err != nil {
		log.Println("restapi.amap.com failed:", err)
		return "未知位置"
	}
	defer resp.Body.Close()
	s, err := ioutil.ReadAll(resp.Body)
	fmt.Println(string(s))

	m := make(map[string]string)

	err = json.Unmarshal(s, &m)
	if err != nil {
		log.Println("Umarshal failed:", err)
	}

	return m["country"] + "-" + m["province"] + "-" + m["city"] + "-" + m["district"] + "-" + m["isp"]
}

// 获取局域网ip地址
func GetLocalHost() string {
	netInterfaces, err := net.Interfaces()
	if err != nil {
		log.Println("net.Interfaces failed, err:", err.Error())
	}

	for i := 0; i < len(netInterfaces); i++ {
		if (netInterfaces[i].Flags & net.FlagUp) != 0 {
			addrs, _ := netInterfaces[i].Addrs()

			for _, address := range addrs {
				if ipnet, ok := address.(*net.IPNet); ok && !ipnet.IP.IsLoopback() {
					if ipnet.IP.To4() != nil {
						return ipnet.IP.String()
					}
				}
			}
		}

	}
	return ""
}