import { Injectable } from '@nestjs/common';
import { HiboutikClient } from './hiboutik.client';
import {
  CustomerAddressDetailsHiboutikDto,
  customerAddressDetailsHiboutikSchema,
  CustomerHiboutikDto,
  customerHiboutikSchema,
  FullCustomerHiboutikDto,
  fullCustomerHiboutikSchema,
} from '../models/hiboutikDTO/customer.hiboutik.dto';

/** Reads customers from the Hiboutik API. */
@Injectable()
export class CustomerHiboutikRepository {
  constructor(private readonly hiboutikClient: HiboutikClient) {}

  /**
   * Customer summaries only: use {@link getCustomerById} for addresses and sales. Sorted by id so that the pages are
   * stable, but a customer created or deleted while they are walked can still shift the following ones.
   */
  async getCustomers(): Promise<CustomerHiboutikDto[]> {
    return this.hiboutikClient.getAllPages('/customers', customerHiboutikSchema, {
      order_by: 'customers_id',
      sort: 'ASC',
    });
  }

  /**
   * Full customer, with its addresses and sales.
   * @returns `null` when Hiboutik says the customer does not exist (404 or empty answer).
   * @throws on any other failure: an unknown state is never taken for a deleted customer.
   */
  async findCustomerById(id: number): Promise<FullCustomerHiboutikDto | null> {
    return this.hiboutikClient.getOne(`/customer/${id}`, fullCustomerHiboutikSchema);
  }

  /** Same as {@link findCustomerById}, but a missing customer throws. */
  async getCustomerById(id: number): Promise<FullCustomerHiboutikDto> {
    const customer = await this.findCustomerById(id);
    if (!customer) throw new Error(`Hiboutik customer ${id} not found`);
    return customer;
  }

  /**
   * Address with its company details.
   * @throws if the address does not exist.
   */
  async getAddressById(id: number): Promise<CustomerAddressDetailsHiboutikDto> {
    const address = await this.hiboutikClient.getOne(`/customers_addresses/${id}`, customerAddressDetailsHiboutikSchema);
    if (!address) throw new Error(`Hiboutik address ${id} not found`);
    return address;
  }
}