package utils

import (
	"encoding/json"
	"fmt"
	"github.com/tal-tech/go-zero/core/logx"
	"io/ioutil"
	"net/http"
	"net/url"
	"strings"
)

type Callback func(result []byte) interface{}

func HttpDoCallBack(reqUrl, method string, params map[string]string, header map[string]string, callback Callback) (data interface{}, err error) {
	body, err := HttpDo(reqUrl, method, params, header)
	if err != nil {
		logx.Errorf("method %s, reqUrl %s error %s", method, reqUrl, err)
		return nil, err
	}
	if len(body) > 0 {
		data = callback(body)
		return data, err
	}
	return nil, err
}

func HttpDo(reqUrl, method string, params map[string]string, header map[string]string) (data []byte, err error) {
	var paramStr []byte
	paramStr, _ = json.Marshal(params)
	client := &http.Client{}
	req, err := http.NewRequest(strings.ToUpper(method), reqUrl, strings.NewReader(string(paramStr)))
	if err != nil {
		logx.Errorf("method %s, reqUrl %s error %s", method, reqUrl, err)
		return nil, err
	}
	for k, v := range header {
		req.Header.Set(k, v)
	}
	resp, err := client.Do(req)
	if err != nil {
		logx.Errorf("method %s, reqUrl %s error %s", method, reqUrl, err)
	}
	defer resp.Body.Close()

	body, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		logx.Errorf("method %s, reqUrl %s error %s", method, reqUrl, err)
		return nil, err
	}
	return body, nil
}

func GetParameterString(params map[string][]string) string {
	var paramStr = ""
	for k, v := range params {
		s, _ := url.QueryUnescape(strings.Join(v, ","))
		if len(paramStr) == 0 {
			paramStr = fmt.Sprintf("%s=%s", k, s)
		} else {
			paramStr = fmt.Sprintf("%s&%s=%s", paramStr, k, s)
		}
	}
	return paramStr
}

func GetSign(data, url string) string {
	reqMap := make(map[string]string)
	reqMap["obj"] = data
	headerMap := make(map[string]string)
	headerMap["Content-Type"] = "application/json"
	b, err := HttpDo(url, "POST", reqMap, headerMap)
	if err != nil {
		logx.Error(err)
	}
	return string(b)
}