import { Injectable } from '@nestjs/common';
import { Converter } from './converter';
import { OrderSource } from '../../../prisma/generated/client';
import { OrderWithLinesInput } from '../../../prisma/customObjects/prisma.custom.object';
import { SaleHiboutikDto, SaleLineHiboutikDto } from '../hiboutikDTO/sale.hiboutik.dto';
import { parseHiboutikDate } from '../../utils/date';
import { OrderStatus } from '../orderStatus';

@Injectable()
export class OrderConverter extends Converter<OrderWithLinesInput, SaleHiboutikDto> {
  /**
   * Maps a Hiboutik sale to an order (source STORE) with a snapshot of its lines.
   * @throws if the sale has neither a valid completion date nor a valid creation date.
   */
  fromHiboutik(dto: SaleHiboutikDto): OrderWithLinesInput {
    const completedAt = parseHiboutikDate(dto.completed_at);
    const orderedAt = completedAt ?? parseHiboutikDate(dto.created_at);
    if (!orderedAt) throw new Error(`Hiboutik sale ${dto.sale_id} has no valid date`);

    const customerId = Number(dto.customer_id);
    return {
      hiboutikSaleId: Number(dto.sale_id),
      orderedAt,
      source: OrderSource.STORE,
      status: completedAt ? OrderStatus.COMPLETED : OrderStatus.PENDING,
      total: dto.total,
      // 0 for an anonymous sale
      customer: customerId > 0 ? { connect: { hiboutikId: customerId } } : undefined,
      lines: (dto.line_items ?? []).map((line) => this.lineFromHiboutik(line)),
    };
  }

  private lineFromHiboutik(line: SaleLineHiboutikDto): OrderWithLinesInput['lines'][number] {
    return {
      barcode: line.product_barcode?.trim() || null,
      hiboutikProductId: Number(line.product_id),
      hiboutikSizeId: Number(line.product_size),
      productName: line.product_model,
      quantity: Number(line.quantity),
      unitPrice: line.item_unit_gross,
      // same rule as ProductVersion: the product name for a product without sizes
      versionName: line.size_name?.trim() || line.product_model,
    };
  }

  toHiboutik(): SaleHiboutikDto {
    throw new Error('Method not implemented.');
  }
}