import { Injectable } from '@nestjs/common';
import { Converter } from './converter';
import { CustomerAddressCreateInput } from '../../../prisma/generated/models/CustomerAddress';
import { CustomerAddressDetailsHiboutikDto, CustomerAddressHiboutikDto } from '../hiboutikDTO/customer.hiboutik.dto';

/** Trimmed value, `null` when empty so that a value removed in Hiboutik is also removed in database. */
const optional = (value: string | null | undefined): string | null => value?.trim() || null;
const required = (value: string | null | undefined): string => value?.trim() ?? '';

/**
 * Maps an address. Company details (tax/company number, legal status) are:
 * - `null` when the address has no company,
 * - mapped when `dto` comes from `GET /customers_addresses/:id` ({@link CustomerAddressDetailsHiboutikDto}),
 * - `undefined` (stored values kept) when the details were not fetched.
 */
@Injectable()
export class CustomerAddressConverter extends Converter<
  CustomerAddressCreateInput,
  CustomerAddressHiboutikDto | CustomerAddressDetailsHiboutikDto
> {
  fromHiboutik(dto: CustomerAddressHiboutikDto | CustomerAddressDetailsHiboutikDto): CustomerAddressCreateInput {
    const company = optional(dto.company);
    const hasDetails = 'tax_number' in dto;
    const companyDetail = (value: string | null | undefined) => (!company ? null : hasDetails ? optional(value) : undefined);
    const details = dto as Partial<CustomerAddressDetailsHiboutikDto>;

    return {
      address: required(dto.address),
      city: required(dto.city),
      company,
      companyNumber: companyDetail(details.company_number),
      country: required(dto.country),
      firstName: required(dto.first_name),
      hiboutikId: Number(dto.address_id),
      isDefault: Number(dto.default) === 1,
      lastName: required(dto.last_name),
      legalStatus: companyDetail(details.legal_status),
      other: optional(dto.other),
      phone: optional(dto.phone),
      state: optional(dto.state),
      taxNumber: companyDetail(details.tax_number),
      zipCode: required(dto.zip_code),
      customer: { connect: { hiboutikId: Number(dto.customers_id) } },
    };
  }
  toHiboutik(): CustomerAddressHiboutikDto {
    throw new Error('Method not implemented.');
  }
}