import { encrypt, decrypt } from 'crypto-js/aes';
import UTF8, { parse } from 'crypto-js/enc-utf8';
import pkcs7 from 'crypto-js/pad-pkcs7';
import ECB from 'crypto-js/mode-ecb';
import md5 from 'crypto-js/md5';
import Base64 from 'crypto-js/enc-base64';
import {mode, pad, lib} from 'crypto-js'

export interface EncryptionParams {
  key: string;
  iv: string;
}

export interface CustomCipherParams {
  mode?: typeof mode.ECB;
  padding?: typeof pad.Pkcs7;
  iv?: lib.WordArray;
}


export class AesEncryption {
  private key;
  private iv: lib.WordArray;

  constructor(opt: Partial<EncryptionParams> = {}) {
    const { key, iv } = opt;
    if (key) {
      this.key = parse(key);
    }
    this.iv = iv ? parse(iv) : lib.WordArray.create([]);
  }

  get getOptions(): CustomCipherParams {
    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);
  }
}

export function encryptByBase64(cipherText: string) {
  return UTF8.parse(cipherText).toString(Base64);
}

export function decodeByBase64(cipherText: string) {
  return Base64.parse(cipherText).toString(UTF8);
}

export function encryptByMd5(password: string) {
  return md5(password).toString();
}