import { Injectable } from '@nestjs/common';
import { EncryptionAlgorithm } from '../core/domain/username.types';
import * as bcrypt from 'bcrypt';
import * as argon2 from 'argon2';
import { PasswordEncrypterPort } from '../core/application/ports/password-encrypter.port';

@Injectable()
export class PasswordEncrypter extends PasswordEncrypterPort {
  encrypt = async (plainPassword: string): Promise<string> => {
    switch (this.encryptionAlgorithm) {
      case EncryptionAlgorithm.BCRYPT:
        return await bcrypt.hash(plainPassword, 10);
      case EncryptionAlgorithm.ARGON2D:
      case EncryptionAlgorithm.ARGON2I:
      case EncryptionAlgorithm.ARGON2ID:
        return await argon2.hash(plainPassword, {
          type: this.argonType(),
        });
    }
  };

  private argonType = ():
    | typeof argon2.argon2d
    | typeof argon2.argon2i
    | typeof argon2.argon2id => {
    switch (this.encryptionAlgorithm) {
      case EncryptionAlgorithm.ARGON2D:
        return argon2.argon2d;
      case EncryptionAlgorithm.ARGON2I:
        return argon2.argon2i;
      default:
        return argon2.argon2id;
    }
  };
}