import type { ValueObject } from '@core/shared/domain/ValueObject';
import { RacingDomainValidationError } from '../errors/RacingDomainError';
import type { Weekday } from '../types/Weekday';
import { ALL_WEEKDAYS } from '../types/Weekday';

export interface MonthlyRecurrencePatternProps {
  ordinal: 1 | 2 | 3 | 4;
  weekday: Weekday;
}

export class MonthlyRecurrencePattern implements ValueObject<MonthlyRecurrencePatternProps> {
  readonly ordinal: 1 | 2 | 3 | 4;
  readonly weekday: Weekday;

  private constructor(ordinal: 1 | 2 | 3 | 4, weekday: Weekday) {
    this.ordinal = ordinal;
    this.weekday = weekday;
  }

  static create(ordinal: 1 | 2 | 3 | 4, weekday: Weekday): MonthlyRecurrencePattern {
    if (!ordinal || ordinal < 1 || ordinal > 4) {
      throw new RacingDomainValidationError('MonthlyRecurrencePattern ordinal must be between 1 and 4');
    }
    if (!weekday || !ALL_WEEKDAYS.includes(weekday)) {
      throw new RacingDomainValidationError('MonthlyRecurrencePattern weekday must be a valid weekday');
    }
    return new MonthlyRecurrencePattern(ordinal, weekday);
  }

  /**
   * Get the ordinal suffix (1st, 2nd, 3rd, 4th)
   */
  getOrdinalSuffix(): string {
    switch (this.ordinal) {
      case 1:
        return '1st';
      case 2:
        return '2nd';
      case 3:
        return '3rd';
      case 4:
        return '4th';
    }
  }

  /**
   * Get description of the pattern
   */
  getDescription(): string {
    return `${this.getOrdinalSuffix()} ${this.weekday} of the month`;
  }

  get props(): MonthlyRecurrencePatternProps {
    return {
      ordinal: this.ordinal,
      weekday: this.weekday,
    };
  }

  equals(other: ValueObject<MonthlyRecurrencePatternProps>): boolean {
    const a = this.props;
    const b = other.props;
    return a.ordinal === b.ordinal && a.weekday === b.weekday;
  }
}