import { HealthKitRepository } from '../repositories/HealthKitRepository';
import { HealthKitQuantitySample } from '../entities/HealthKitSample';
import { HealthKitIdentifier, HealthKitUnit, DateRange } from '../value-objects/HealthKitIdentifier';

export class GetQuantitySamplesUseCase {
  constructor(private readonly healthKitRepository: HealthKitRepository) {}

  async execute(
    identifier: string,
    unit: string,
    dateRange: { startDate: Date; endDate: Date }
  ): Promise<HealthKitQuantitySample[]> {
    try {
      const healthKitIdentifier = HealthKitIdentifier.create(identifier);
      const healthKitUnit = HealthKitUnit.create(unit);
      const range = new DateRange(dateRange.startDate, dateRange.endDate);

      return await this.healthKitRepository.getQuantitySamples(
        healthKitIdentifier,
        healthKitUnit,
        range
      );
    } catch (error) {
      throw new Error(`Failed to get quantity samples: ${error instanceof Error ? error.message : 'Unknown error'}`);
    }
  }

  async executeForDays(
    identifier: string,
    unit: string,
    days: number
  ): Promise<HealthKitQuantitySample[]> {
    try {
      const healthKitIdentifier = HealthKitIdentifier.create(identifier);
      const healthKitUnit = HealthKitUnit.create(unit);

      if (days <= 0) {
        throw new Error('Days must be greater than 0');
      }

      return await this.healthKitRepository.getQuantitySamplesForDays(
        healthKitIdentifier,
        healthKitUnit,
        days
      );
    } catch (error) {
      throw new Error(`Failed to get quantity samples for days: ${error instanceof Error ? error.message : 'Unknown error'}`);
    }
  }
}