package geo

import (
	"encoding/json"
	"github.com/pkg/errors"
	"net/http"
)

func Ipapi() (prov, city, isp string, err error) {
	const endpoint = "http://ip-api.com/json/?fields=regionName,city,as&lang=zh-CN"

	resp, err := http.Get(endpoint)
	if err != nil {
		return "", "", "", err
	}
	defer resp.Body.Close()

	if resp.StatusCode != http.StatusOK {
		return "", "", "", err
	}

	var data struct {
		RegionName string `json:"regionName"`
		City       string `json:"city"`
		As         string `json:"as"`
	}
	err = json.NewDecoder(resp.Body).Decode(&data)
	if err != nil {
		return "", "", "", err
	}

	prov = data.RegionName
	city = data.City
	isp = data.As
	if prov == "" || city == "" || isp == "" {
		return "", "", "", errors.New("解析数据为空")
	}

	return prov, city, isp, nil
}