package comm

import (
	"encoding/hex"
	"fmt"
	"math/rand"
	"testing"
	"time"
)

// 长度为62
var bytes []byte = []byte("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890")

func init() {
	// 保证每次生成的随机数不一样
	rand.Seed(time.Now().UnixNano())
}

// 方法一
func RandStr1(n int) string {
	result := make([]byte, n)
	for i := 0; i < n; i++ {
		result[i] = bytes[rand.Int31()%62]
	}
	return string(result)
}

// 方法二
func RandStr2(n int) string {
	result := make([]byte, n/2)
	rand.Read(result)
	return hex.EncodeToString(result)
}

func TestRandom32(t *testing.T) {
	fmt.Println(RandStr1(32))
}

func TestAppKey(t *testing.T) {
	appId := "screen"
	appKey := "zjIWxbpOxE9lQaRuiO1lLmed7UqWYVjo"
	secrate := GenSecretKey(appId, appKey)

	t.Error("xxxxx")
	fmt.Printf("appId %s key: %s => %s \n", appId, appKey, secrate)
}

func TestEncode(t *testing.T) {

	secrate := "rxk1ly9+IPbBMJkcyUS53wYrh1owMDAwMDAwMDAwMDA="
	c, e := Encode(secrate, []byte("hello world"))
	if e != nil {
		t.Error(e)
	}
	fmt.Printf("encoded => %s \n", c)
	ret, e := Decode(secrate, c)
	if e != nil {
		t.Error(e)
	}
	fmt.Printf("decode => %s \n", string(ret))
}