import { Injectable, Logger } from '@nestjs/common';
import { BrandHiboutikRepository } from '../../hiboutik/brand.hiboutik.repository';
import { BrandDatabaseRepository } from '../../database/brand.database.repository';
import { BrandConverter } from '../../models/converter/brand.converter';
import { forEachSafely } from '../../utils/sync';

@Injectable()
export class BrandHiboutikService {
  private readonly logger = new Logger('BrandHiboutikService');

  constructor(
    private readonly brandHiboutikRepository: BrandHiboutikRepository,
    private readonly brandDatabaseRepository: BrandDatabaseRepository,
    private readonly brandConverter: BrandConverter,
  ) {}

  /** Mirrors Hiboutik brands: upserts each of them, then deletes the brands missing from Hiboutik. */
  async syncBrands() {
    const hiboutikBrands = await this.brandHiboutikRepository.getBrands();
    // One upsert per brand: an invalid brand must not prevent the others from being saved
    const nbFailed = await forEachSafely(
      this.brandConverter.fromHiboutikList(hiboutikBrands),
      (brand) => this.brandDatabaseRepository.upsert(brand),
      this.logger,
      (brand) => `Hiboutik brand ${brand.hiboutikId}`,
    );

    // Hiboutik is trusted: a successful (2xx) answer, even an empty list, is the truth. An HTTP error throws before this point.
    const nbDeleted = await this.brandDatabaseRepository.deleteMissing(hiboutikBrands.map((dto) => dto.brand_id));
    this.logger.log(
      `Brands sync ended: ${hiboutikBrands.length - nbFailed}/${hiboutikBrands.length} synced, ${nbFailed} failed, ${nbDeleted} deleted.`,
    );
  }
}