import { ITransactionManager } from "@erp/core/api";
import { UniqueID, UtcDate } from "@repo/rdx-ddd";
import { Maybe, Result } from "@repo/rdx-utils";
import { InvalidProformaStatusError } from "../../domain";
import { StatusInvoiceIsApprovedSpecification } from "../../domain/specs";
import { CustomerInvoiceApplicationService } from "../customer-invoice-application.service";

type IssueCustomerInvoiceUseCaseInput = {
  companyId: UniqueID;
  proforma_id: string;
};

/**
 * Caso de uso: Conversión de una proforma a factura definitiva.
 *
 * - Recupera la proforma
 * - Valida su estado ("approved")
 * - Genera la factura definitiva (nueva entidad)
 * - Marca la proforma como "issued"
 * - Persiste ambas dentro de la misma transacción
 */
export class IssueCustomerInvoiceUseCase {
  constructor(
    private readonly service: CustomerInvoiceApplicationService,
    private readonly transactionManager: ITransactionManager
  ) {}

  public execute(params: IssueCustomerInvoiceUseCaseInput) {
    const { proforma_id, companyId } = params;

    const idOrError = UniqueID.create(proforma_id);

    if (idOrError.isFailure) {
      return Result.fail(idOrError.error);
    }

    const proformaId = idOrError.data;

    return this.transactionManager.complete(async (transaction) => {
      try {
        /** 1. Recuperamos la proforma */
        const proformaResult = await this.service.getInvoiceByIdInCompany(
          companyId,
          proformaId,
          transaction
        );

        if (proformaResult.isFailure) {
          return Result.fail(proformaResult.error);
        }

        const proforma = proformaResult.data;

        /** 2. Comprobamos que la proforma origen está aprovada para generar la factura */
        const isApprovedSpec = new StatusInvoiceIsApprovedSpecification();
        if (!(await isApprovedSpec.isSatisfiedBy(proforma))) {
          return Result.fail(new InvalidProformaStatusError(proformaId.toString()));
        }

        /** 3. Generar nueva factura */
        const nextNumberResult = await this.service.getNextIssueInvoiceNumber(
          companyId,
          proforma.series,
          transaction
        );
        if (nextNumberResult.isFailure) {
          return Result.fail(nextNumberResult.error);
        }

        const newIssueNumber = nextNumberResult.data;

        // props base obtenidas del agregado proforma
        const issuedInvoiceOrError = this.service.buildIssueInvoiceInCompany(companyId, proforma, {
          invoiceNumber: Maybe.some(newIssueNumber),
          invoiceDate: UtcDate.today(),
        });

        if (issuedInvoiceOrError.isFailure) {
          return Result.fail(issuedInvoiceOrError.error);
        }

        const issuedInvoice = issuedInvoiceOrError.data;

        /** 4. Persistencia */
        await this.service.createInvoiceInCompany(companyId, issuedInvoice, transaction);

        // actualizamos la proforma
        const updatedProformaResult = proforma.asIssued();
        if (updatedProformaResult.isFailure) {
          return Result.fail(updatedProformaResult.error);
        }

        await this.service.updateInvoiceInCompany(
          companyId,
          updatedProformaResult.data,
          transaction
        );

        /** 5. Resultado */
        return Result.ok(issuedInvoice);
      } catch (error: unknown) {
        return Result.fail(error as Error);
      }
    });
  }
}