package utils

import (
	"context"
	"crypto/sha1"
	"encoding/base64"
	"encoding/hex"
	"io"
	"io/ioutil"
	"net/http"
	"sort"
	"strings"
	"time"
)

// 调用POST请求
func HttpPost(url string, body string) (remoteResponse string, err error) {

	bodyReader := strings.NewReader(body)
	//application/x-www-form-urlencoded
	//application/json
	_, cancel := context.WithTimeout(context.Background(), 20*time.Second)
	defer cancel()

	client := &http.Client{
		Timeout: time.Second * 20, // 设置客户端超时为5秒
	}

	response, err1 := client.Post(url, "application/x-www-form-urlencoded", bodyReader)

	if err1 != nil {
		err = err1
		return
	}
	defer response.Body.Close()

	resBody, err2 := ioutil.ReadAll(response.Body)

	if err2 != nil {
		err = err2
		return
	}

	remoteResponse = string(resBody)

	return
}

// 调用Get请求
func HttpGet(url string) (remoteResponse string, err error) {

	response, err1 := http.Get(url)

	if err1 != nil {
		err = err1
		return
	}
	defer response.Body.Close()

	resBody, err2 := ioutil.ReadAll(response.Body)

	if err2 != nil {
		err = err2
		return
	}

	remoteResponse = string(resBody)

	return
}

// 复杂http请求
func HttpDo(httpMethod string, url string, headerMap map[string]string, rawBody string) (remoteResponse string, err error) {

	_, cancel := context.WithTimeout(context.Background(), 20*time.Second)
	defer cancel()

	client := &http.Client{
		Timeout: time.Second * 20, // 设置客户端超时为5秒
	}

	req, err0 := http.NewRequest(httpMethod, url, strings.NewReader(rawBody))

	if err0 != nil {

		err = err0
		return
	}

	if len(headerMap) > 0 {
		for k, v := range headerMap {
			req.Header.Set(k, v)
		}
	}

	resp, err1 := client.Do(req)

	if err1 != nil {
		err = err1
		return
	}

	defer resp.Body.Close()

	body, err2 := ioutil.ReadAll(resp.Body)
	if err2 != nil {
		err = err2
		return
	}

	remoteResponse = string(body)

	return

}

func CreateApiSign(params map[string]string, secret string) string {

	keys := make([]string, 20)
	for key, _ := range params {
		if key == "Signature" {
			continue
		}
		keys = append(keys, key)
	}
	//按key升序
	sort.Strings(keys)
	//把KEY值合并为字符串
	waitSignString := ""
	for _, value := range keys {
		waitSignString += base64.StdEncoding.EncodeToString([]byte(params[value]))
	}
	//加上密钥
	appSecret := secret
	waitSignString += appSecret

	// log.InfoF("waitSignString: %s", waitSignString)
	//sha1加密
	t := sha1.New()
	io.WriteString(t, waitSignString)
	sign := t.Sum(nil)

	return hex.EncodeToString(sign)

}