package report

import (
	"encoding/json"
	"errors"
	"io"
	"net/http"
	"proxy-server/client/core"
	"strings"
)

func Online(prov, city, isp string) (host string, err error) {

	var ispInt = 0
	switch isp {
	case "电信":
		ispInt = 1
	case "联通":
		ispInt = 2
	case "移动":
		ispInt = 3
	}

	body, err := json.Marshal(map[string]any{
		"prov":    prov,
		"city":    city,
		"isp":     ispInt,
		"name":    core.Name,
		"version": core.Version,
	})
	if err != nil {
		return "", err
	}

	req, err := http.NewRequest("POST", core.EndpointOnline, strings.NewReader(string(body)))
	if err != nil {
		return "", errors.New("创建节点注册请求失败")
	}

	req.Header.Set("Content-Type", "application/json")
	resp, err := http.DefaultClient.Do(req)
	if err != nil {
		return "", errors.New("节点注册失败")
	}
	defer resp.Body.Close()
	if resp.StatusCode != http.StatusOK {
		return "", errors.New("节点注册失败，状态码: " + resp.Status)
	}

	bytes, err := io.ReadAll(resp.Body)
	if err != nil {
		return "", errors.New("读取节点注册响应失败")
	}
	var respBody struct {
		Host string `json:"host"`
	}
	err = json.Unmarshal(bytes, &respBody)
	if err != nil {
		return "", errors.New("解析节点注册响应失败")
	}
	if respBody.Host == "" {
		return "", errors.New("节点注册失败，响应体为空")
	}

	return respBody.Host, nil
}