package sms

import (
	"crypto/md5"
	"crypto/sha1"
	"encoding/hex"
	"encoding/json"
	"io"
	"io/ioutil"
	"net/http"
	"net/url"
	"sort"
	"strconv"
	"strings"
)

// 官方地址：https://github.com/dev-submail/submail_go_sdk

const Server = "https://api.mysubmail.com"

func _GetTimestamp() string {
	resp := _Get(Server + "/service/timestamp")
	var dict map[string]interface{}
	err := json.Unmarshal([]byte(resp), &dict)
	if err != nil {
		return err.Error()
	}
	return strconv.Itoa(int(dict["timestamp"].(float64)))
}

func _CreateSignature(req map[string]string, config map[string]string) string {
	appkey := config["appkey"]
	appid := config["appid"]
	signtype := config["signType"]

	keys := make([]string, 0, 32)
	for key, _ := range req {
		keys = append(keys, key)
	}
	sort.Strings(keys)
	str_list := make([]string, 0, 32)
	for _, key := range keys {
		str_list = append(str_list, key+"="+req[key])
	}
	sigstr := strings.Join(str_list, "&")
	sigstr = appid + appkey + sigstr + appid + appkey
	if signtype == "md5" {
		mymd5 := md5.New()
		io.WriteString(mymd5, sigstr)
		return hex.EncodeToString(mymd5.Sum(nil))
	} else if signtype == "sha1" {
		mysha1 := sha1.New()
		io.WriteString(mysha1, sigstr)
		return hex.EncodeToString(mysha1.Sum(nil))
	} else {
		return appkey
	}
}

func _Get(requesturl string) string {
	u, _ := url.Parse(requesturl)
	retstr, err := http.Get(u.String())
	if err != nil {
		return err.Error()
	}
	result, err := ioutil.ReadAll(retstr.Body)
	retstr.Body.Close()
	if err != nil {
		return err.Error()
	}
	return string(result)
}

func _Post(requesturl string, postdata map[string]string) string {
	var r http.Request
	r.ParseForm()

	for key, val := range postdata {
		r.Form.Add(key, val)
	}

	body := strings.NewReader(r.Form.Encode())

	retstr, err := http.Post(requesturl, "application/x-www-form-urlencoded;charset=utf-8", body)

	if err != nil {
		return err.Error()
	}
	result, err := ioutil.ReadAll(retstr.Body)
	retstr.Body.Close()
	if err != nil {
		return err.Error()
	}
	return string(result)
}