import { decrypt, encrypt } from 'crypto-js/aes';
import Base64 from 'crypto-js/enc-base64';
import UTF8, { parse } from 'crypto-js/enc-utf8';
import md5 from 'crypto-js/md5';
import ECB from 'crypto-js/mode-ecb';

import pkcs7 from 'crypto-js/pad-pkcs7';

export interface EncryptionParams {
  key: string
  iv: string
}

/**
 * AES 加密解密
 */
export class AesEncryption {
  private key;

  private iv;

  constructor(opt: Partial<EncryptionParams> = {}) {
    const { key, iv } = opt;
    if (key) {
      this.key = parse(key);
    }
    if (iv) {
      this.iv = parse(iv);
    }
  }

  get getOptions() {
    return {
      mode: ECB,
      padding: pkcs7,
      iv: this.iv,
    };
  }

  encryptByAES(cipherText: string) {
    return encrypt(cipherText, this.key!, this.getOptions).toString();
  }

  decryptByAES(cipherText: string) {
    return decrypt(cipherText, this.key!, this.getOptions).toString(UTF8);
  }
}

/**
 * Base64加密
 * @param cipherText
 */
export function encryptByBase64(cipherText: string) {
  return UTF8.parse(cipherText).toString(Base64);
}

/**
 * Base64解密
 * @param cipherText
 */
export function decodeByBase64(cipherText: string) {
  return Base64.parse(cipherText).toString(UTF8);
}

/**
 * MD5加密
 * @param password
 */
export function encryptByMd5(password: string) {
  return md5(password).toString();
}