import type { EmailAddress, Name, UniqueID } from "@repo/rdx-ddd";
import { AggregateRoot } from "@repo/rdx-ddd";
import { Result } from "@repo/rdx-utils";

import { IdentityError } from "./identity-error";
import type { PasswordHash } from "./value-objects/password-hash.vo";

export type UserProps = Readonly<{
  name: Name;
  email: EmailAddress;
  passwordHash: PasswordHash;
  active: boolean;
  isInitialAdmin: boolean;
  authVersion: number;
}>;

export class User extends AggregateRoot<UserProps> {
  static create(props: UserProps, id?: UniqueID): Result<User, IdentityError> {
    if (
      !Number.isSafeInteger(props.authVersion) ||
      props.authVersion < 1 ||
      props.name.toPrimitive().length > 100
    ) {
      return Result.fail(new IdentityError("INVALID_REQUEST"));
    }
    if (props.isInitialAdmin && !props.active) {
      return Result.fail(new IdentityError("ADMIN_PROTECTED"));
    }

    return Result.ok(new User(props, id));
  }

  static rehydrate(props: UserProps, id: UniqueID): User {
    return new User(props, id);
  }

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

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

  get passwordHash(): PasswordHash {
    return this.props.passwordHash;
  }

  get active(): boolean {
    return this.props.active;
  }

  get isInitialAdmin(): boolean {
    return this.props.isInitialAdmin;
  }

  get authVersion(): number {
    return this.props.authVersion;
  }

  update(
    values: Readonly<{ name: Name; email: EmailAddress; active: boolean }>
  ): Result<User, IdentityError> {
    if (values.name.toPrimitive().length > 100) {
      return Result.fail(new IdentityError("INVALID_REQUEST"));
    }
    if (this.isInitialAdmin && !values.active) {
      return Result.fail(new IdentityError("ADMIN_PROTECTED"));
    }
    if (
      this.name.equals(values.name) &&
      this.email.equals(values.email) &&
      this.active === values.active
    ) {
      return Result.ok(this);
    }

    return Result.ok(
      new User(
        {
          ...this.props,
          ...values,
          authVersion: this.authVersion + (values.active === this.active ? 0 : 1),
        },
        this.id
      )
    );
  }

  changePassword(passwordHash: PasswordHash): User {
    if (this.passwordHash.equals(passwordHash)) {
      return this;
    }

    return new User({ ...this.props, passwordHash, authVersion: this.authVersion + 1 }, this.id);
  }
}