/***
 * title: storage.ts
 * Desc: 对存储的简单封装
 */
// 加密库
import CryptoJS from "crypto-js";
import { projectPrefix, expireTimes } from "../variable";

// 十六位十六进制数作为密钥
const SECRET_KEY = CryptoJS.enc.Utf8.parse("3333e66666111111");
// 十六位十六进制数作为密钥偏移量
const SECRET_IV = CryptoJS.enc.Utf8.parse("3333bb2222111111");

// 类型 window.localStorage,window.sessionStorage,
type Config = {
  type: any;
  prefix: string;
  expire: any;
  isEncrypt: Boolean;
};
const config: Config = {
  type: "localStorage", // 本地存储类型 sessionStorage
  prefix: projectPrefix, // 名称前缀 建议：项目名 + 项目版本
  expire: expireTimes, //过期时间 单位：秒
  isEncrypt: true, // 默认加密 为了调试方便, 开发过程中可以不加密
};

// 判断是否支持 Storage
export const isSupportStorage = () => {
  return typeof Storage !== "undefined" ? true : false;
};

// 设置 setStorage
export const setStorage = (key: string, value: any, expire = 0) => {
  if (value === "" || value === null || value === undefined) {
    value = null;
  }

  if (isNaN(expire) || expire < 0) throw new Error("Expire must be a number");

  expire = expire ? expire : config.expire;
  let data = {
    value: value, // 存储值
    time: Date.now(), //存值时间戳
    expire: expire, // 过期时间
  };

  console.log("shezhi ", data);

  const encryptString = config.isEncrypt
    ? encrypt(JSON.stringify(data))
    : JSON.stringify(data);

  (window[config.type] as any).setItem(autoAddPrefix(key), encryptString);
};

// 获取 getStorage
export const getStorage = (key: string) => {
  key = autoAddPrefix(key);
  // key 不存在判断
  if (
    !(window[config.type] as any).getItem(key) ||
    JSON.stringify((window[config.type] as any).getItem(key)) === "null"
  ) {
    return null;
  }

  // 优化 持续使用中续期
  const storage = config.isEncrypt
    ? JSON.parse(decrypt((window[config.type] as any).getItem(key)))
    : JSON.parse((window[config.type] as any).getItem(key));

  let nowTime = Date.now();

  // 过期删除

  let setExpire = (storage.expire || config.expire) * 1000,
    expDiff = nowTime - storage.time;
  console.log("设置时间", setExpire, expDiff);
  if (setExpire < expDiff) {
    removeStorage(key);
    return null;
  } else {
    // 未过期期间被调用 则自动续期 进行保活
    setStorage(autoRemovePrefix(key), storage.value, storage.expire);
    return storage.value;
  }
};

// 是否存在 hasStorage
export const hasStorage = (key: string) => {
  key = autoAddPrefix(key);
  let arr = getStorageAll().filter((item) => {
    return item.key === key;
  });
  return arr.length ? true : false;
};

// 获取所有key
export const getStorageKeys = () => {
  let items = getStorageAll();
  let keys = [];
  for (let index = 0; index < items.length; index++) {
    keys.push(items[index].key);
  }
  return keys;
};

// 获取全部 getAllStorage
export const getStorageAll = () => {
  let len = window[config.type].length; // 获取长度
  let arr = new Array(); // 定义数据集
  for (let i = 0; i < len; i++) {
    // 获取key 索引从0开始
    let getKey = (window[config.type] as any).key(i);
    // 获取key对应的值
    let getVal = (window[config.type] as any).getItem(getKey);
    // 放进数组
    arr[i] = { key: getKey, val: getVal };
  }
  return arr;
};

// 删除 removeStorage
export const removeStorage = (key: string) => {
  (window[config.type] as any).removeItem(autoAddPrefix(key));
};

// 清空 clearStorage
export const clearStorage = () => {
  (window[config.type] as any).clear();
};

// 名称前自动添加前缀
const autoAddPrefix = (key: string) => {
  const prefix = config.prefix ? config.prefix + "_" : "";
  return prefix + key;
};

// 移除已添加的前缀
const autoRemovePrefix = (key: string) => {
  const len: any = config.prefix ? config.prefix.length + 1 : "";
  return key.substr(len);
  // const prefix = config.prefix ? config.prefix + '_' : '';
  // return  prefix + key;
};

/**
 * 加密方法
 * @param data
 * @returns {string}
 */
const encrypt = (data: any) => {
  if (typeof data === "object") {
    try {
      data = JSON.stringify(data);
    } catch (error) {
      console.log("encrypt error:", error);
    }
  }
  const dataHex = CryptoJS.enc.Utf8.parse(data);
  const encrypted = CryptoJS.AES.encrypt(dataHex, SECRET_KEY, {
    iv: SECRET_IV,
    mode: CryptoJS.mode.CBC,
    padding: CryptoJS.pad.Pkcs7,
  });
  return encrypted.ciphertext.toString();
};

/**
 * 解密方法
 * @param data
 * @returns {string}
 */
const decrypt = (data: any) => {
  const encryptedHexStr = CryptoJS.enc.Hex.parse(data);
  const str = CryptoJS.enc.Base64.stringify(encryptedHexStr);
  const decrypt = CryptoJS.AES.decrypt(str, SECRET_KEY, {
    iv: SECRET_IV,
    mode: CryptoJS.mode.CBC,
    padding: CryptoJS.pad.Pkcs7,
  });
  const decryptedStr = decrypt.toString(CryptoJS.enc.Utf8);
  return decryptedStr.toString();
};

在组件中使用：

<template>
  <div>
    layout
    <el-button type="primary" @click="getLocal">get</el-button>
    <el-button type="primary" @click="setLocal">set</el-button>
  </div>
</template>

<script setup lang="ts">
import { setStorage, getStorage, getStorageAll,removeStorage, clearStorage } from "../../utils/modules/storage";


let setLocal = (): void => {
  let testLocal = "token123123123";
  setStorage("testLocal", testLocal);
};

let getLocal = (): void => {
  let localVal = getStorage("testLocal");
  let all = getStorageAll()
  console.log("测试存储", localVal,all);
};
</script>

<style scoped lang="scss">

</style>