import bCrypt from "bcryptjs";

import {
  AggregateRoot,
  Email,
  IDomainError,
  Name,
  Result,
  UniqueID,
} from "@shared/contexts";

export interface IUserProps {
  name: Name;
  email: Email;
  password?: string;
  hashed_password?: string;
}

export interface IUser {
  id: UniqueID;
  name: Name;
  email: Email;
  hashed_password: string;

  verifyPassword: (candidatePassword: string) => boolean;
}

export class User extends AggregateRoot<IUserProps> implements IUser {
  public static create(
    props: IUserProps,
    id?: UniqueID,
  ): Result<User, IDomainError> {
    //const isNew = !!id === false;

    // Se hace en el constructor de la Entidad
    /* if (isNew) {
      id = UniqueEntityID.create();
    }*/

    const user = new User(props, id);

    return Result.ok<User>(user);
  }

  public static async hashPassword(password): Promise<string> {
    return hashPassword(password, await genSalt());
  }

  private _hashed_password: string;

  private constructor(props: IUserProps, id?: UniqueID) {
    super({ ...props, password: "", hashed_password: "" }, id);

    this._protectPassword(props);
  }

  get name(): Name {
    return this.props.name;
  }

  get email(): Email {
    return this.props.email;
  }

  get hashed_password(): string {
    return this._hashed_password;
  }

  public verifyPassword(candidatePassword: string): boolean {
    return bCrypt.compareSync(candidatePassword, this._hashed_password!);
  }

  private async _protectPassword(props: IUserProps) {
    const { password, hashed_password } = props;

    if (password) {
      this._hashed_password = await User.hashPassword(password);
    } else {
      this._hashed_password = hashed_password!;
    }
  }
}

async function genSalt(rounds = 10): Promise<string> {
  return new Promise((resolve, reject) => {
    bCrypt.genSalt(rounds, function (err, salt) {
      if (err) return reject(err);
      return resolve(salt);
    });
  });
}

async function hashPassword(password: string, salt: string): Promise<string> {
  return new Promise((resolve, reject) => {
    bCrypt.hash(password, salt, function (err, hash) {
      if (err) return reject(err);
      return resolve(hash);
    });
  });
}

User.hashPassword("123456").then((value) => console.log(value));