import type { ValueObject } from '@core/shared/domain/ValueObject';
import { IdentityDomainValidationError } from '../errors/IdentityDomainError';

export interface RatingDeltaProps {
  value: number;
}

export class RatingDelta implements ValueObject<RatingDeltaProps> {
  readonly value: number;

  private constructor(value: number) {
    this.value = value;
  }

  static create(value: number): RatingDelta {
    if (typeof value !== 'number' || isNaN(value)) {
      throw new IdentityDomainValidationError('Rating delta must be a valid number');
    }

    if (value < -500 || value > 500) {
      throw new IdentityDomainValidationError(
        `Rating delta must be between -500 and 500, got: ${value}`
      );
    }

    return new RatingDelta(value);
  }

  get props(): RatingDeltaProps {
    return { value: this.value };
  }

  equals(other: ValueObject<RatingDeltaProps>): boolean {
    return this.value === other.props.value;
  }

  toNumber(): number {
    return this.value;
  }

  toString(): string {
    return this.value.toString();
  }

  isPositive(): boolean {
    return this.value > 0;
  }

  isNegative(): boolean {
    return this.value < 0;
  }

  isZero(): boolean {
    return this.value === 0;
  }
}