import { BadRequestException, Injectable } from '@nestjs/common';
import { ConfigService } from '@nestjs/config';

import { Environment } from '../../config/env.validation';
import { isTbankErrorCode, TbankErrorCode } from './tbank-error-code';
import { TbankCrypto } from './tbank.crypto';

@Injectable()
export class TbankTokenService {
  private readonly crypto: TbankCrypto;

  constructor(config: ConfigService<Environment, true>) {
    this.crypto = TbankCrypto.fromBase64(
      config.getOrThrow('TOKEN_ENCRYPTION_KEY'),
    );
  }

  encrypt(value: string): string {
    return this.crypto.encrypt(value);
  }

  decrypt(payload: string): string {
    return this.crypto.decrypt(payload);
  }

  async translateInvalidToken<T>(operation: () => Promise<T>): Promise<T> {
    try {
      return await operation();
    } catch (error) {
      if (error instanceof Error && isTbankErrorCode(error.message, TbankErrorCode.InvalidToken)) {
        throw new BadRequestException({ code: TbankErrorCode.InvalidToken });
      }
      throw error;
    }
  }
}