import { AggregateRoot, AggregateID } from '@mobicoop/ddd-library';
import * as bcrypt from 'bcrypt';
import {
  AuthenticationProps,
  CreateAuthenticationProps,
} from './authentication.types';
import { AuthenticationCreatedDomainEvent } from './events/authentication-created.domain-event';
import { AuthenticationDeletedDomainEvent } from './events/authentication-deleted.domain-event';
import { PasswordUpdatedDomainEvent } from './events/password-updated.domain-event';

export class AuthenticationEntity extends AggregateRoot<AuthenticationProps> {
  protected readonly _id: AggregateID;

  static create = async (
    create: CreateAuthenticationProps,
  ): Promise<AuthenticationEntity> => {
    const props: AuthenticationProps = { ...create };
    const hash = await AuthenticationEntity.encryptPassword(props.password);
    const authentication = new AuthenticationEntity({
      id: props.userId,
      props: {
        userId: props.userId,
        password: hash,
        usernames: props.usernames,
      },
    });
    authentication.addEvent(
      new AuthenticationCreatedDomainEvent({ aggregateId: props.userId }),
    );
    return authentication;
  };

  updatePassword = async (password: string): Promise<void> => {
    this.props.password = await AuthenticationEntity.encryptPassword(password);
    this.addEvent(
      new PasswordUpdatedDomainEvent({
        aggregateId: this.id,
      }),
    );
  };

  delete(): void {
    this.addEvent(
      new AuthenticationDeletedDomainEvent({
        aggregateId: this.id,
      }),
    );
  }

  authenticate = async (password: string): Promise<boolean> =>
    await bcrypt.compare(password, this.props.password);

  validate(): void {
    // entity business rules validation to protect it's invariant before saving entity to a database
  }

  private static encryptPassword = async (password: string): Promise<string> =>
    await bcrypt.hash(password, 10);
}