import enquireJs from "enquire.js";
import CryptoJS from "crypto-js";
export function isDef(v) {
  return v !== undefined && v !== null;
}

/**
 * Remove an item from an array.
 */
export function remove(arr, item) {
  if (arr.length) {
    const index = arr.indexOf(item);
    if (index > -1) {
      return arr.splice(index, 1);
    }
  }
}

export function isRegExp(v) {
  return _toString.call(v) === "[object RegExp]";
}

export function enquireScreen(call) {
  const handler = {
    match: function() {
      call && call(true);
    },
    unmatch: function() {
      call && call(false);
    },
  };
  enquireJs.register("only screen and (max-width: 767.99px)", handler);
}

const _toString = Object.prototype.toString;

// 扁平化树形结构
export const extractTree = (arrs, childs, attrArr) => {
  let attrList = [];
  if (!Array.isArray(arrs) && !arrs.length) return [];
  if (typeof childs !== "string") return [];
  if (!Array.isArray(attrArr) || (Array.isArray(attrArr) && !attrArr.length)) {
    attrList = Object.keys(arrs[0]);
    attrList.splice(attrList.indexOf(childs), 1);
    attrList.splice(attrList.indexOf("isLeaf"), 1);
  } else {
    attrList = attrArr;
  }
  let list = [];
  const getObj = (arr) => {
    arr.forEach(function(row) {
      let obj = {};
      attrList.forEach((item) => {
        obj[item] = row[item];
      });
      list.push(obj);
      if (row[childs]) {
        getObj(row[childs]);
      }
    });
    return list;
  };
  return getObj(arrs);
};

/**
 * 加密存储临时数据并解析对象
 */
const aseKey = "**_FXxx_1234_KEY";
const KEY = "KEY_EXTRA";
export class SessionCrypto {
  // 加密
  static setItem(key = KEY, value = "") {
    if (typeof key === "string") {
      const stringify = JSON.stringify(value);
      const encrypt = CryptoJS.AES.encrypt(
        stringify,
        CryptoJS.enc.Utf8.parse(aseKey),
        {
          mode: CryptoJS.mode.ECB,
          padding: CryptoJS.pad.Pkcs7,
        }
      ).toString();
      window.sessionStorage.setItem(key, encrypt);
      return encrypt;
    }
  }
  // 解密
  static getItem(key = KEY) {
    const ssStr = window.sessionStorage.getItem(key) || "";
    try {
      if (ssStr) {
        const decrypt = CryptoJS.AES.decrypt(
          ssStr,
          CryptoJS.enc.Utf8.parse(aseKey),
          {
            mode: CryptoJS.mode.ECB,
            padding: CryptoJS.pad.Pkcs7,
          }
        ).toString(CryptoJS.enc.Utf8);
        const parseStr = JSON.parse(decrypt);
        return parseStr;
      }
      return "";
    } catch (e) {
      return "";
    }
  }
  // 删除
  static remove(key) {
    window.sessionStorage.removeItem(key);
  }
}