package main

import (
    "encoding/json"
    "log"
    "net/http"
    "net/url"
    "strings"
)

type Server struct {
    Endpoint string
    User     string
    Password string
}

type Ip struct {
    Tenant string `json:"tenant"`
    Subnet string `json:"subnet"`
}

type Net struct {
    Tenant string `json:"tenant"`
    Subnet string `json:"subent"`
    Ip2    string `json:"ip"`
}

type Error struct {
    Message string `json:"message"`
}

type Data struct {
    Net   Net   `json:"data"`
    Error Error `json:"error"`
}

func (c *Server) GetIp(ip *Ip) string {
    data1 := url.Values{}
    data1.Add("tenant", ip.Tenant)
    data1.Add("subnet", ip.Subnet)
    req, err := http.NewRequest("POST", c.Endpoint, strings.NewReader(data1.Encode()))
    req.SetBasicAuth(c.User, c.Password)
    req.Header.Add("Content-Type", "application/x-www-form-urlencoded")
    cli := &http.Client{}
    resp, err := cli.Do(req)
    if err != nil {
        log.Fatalln(err)
    }
    defer resp.Body.Close()
    decoder := json.NewDecoder(resp.Body)
    data := Data{}
    err = decoder.Decode(&data)
    if err != nil {
        log.Fatalln(err)
    }
    return data.Net.Ip2
}

func main() {
    client := Server{
        Endpoint: "http://192.168.122.162:7000/getip",
        User:     "testk",
        Password: "testk",
    }
    ip := Ip{
        Tenant: "testk",
        Subnet: "dev",
    }
    data := client.GetIp(&ip)
    log.Println(data)
}