import {
  AggregateRoot,
  type CurrencyCode,
  type LanguageCode,
  type UniqueID,
  type UtcDate,
} from "@repo/rdx-ddd";
import { type Maybe, Result } from "@repo/rdx-utils";

import type { InvoicePaymentMethod, SupplierInvoiceTaxes } from "../entities";
import type { SupplierInvoiceSourceType } from "../enums";
import { type InvoiceAmount, SupplierInvoiceStatus } from "../value-objects";

export interface ISupplierInvoiceCreateProps {
  companyId: UniqueID;
  status: SupplierInvoiceStatus;

  supplierInvoiceCategoryId: UniqueID;

  supplierId: UniqueID;

  invoiceNumber: string;
  invoiceDate: UtcDate;
  dueDate: Maybe<UtcDate>;

  description: Maybe<string>;
  notes: Maybe<string>;

  paymentMethod: Maybe<InvoicePaymentMethod>;

  taxes: SupplierInvoiceTaxes;

  currencyCode: CurrencyCode;
  languageCode: LanguageCode;

  sourceType: SupplierInvoiceSourceType;
  documentId: Maybe<UniqueID>;

  version?: number;
}

export interface ISupplierInvoiceTotals {
  taxableAmount: InvoiceAmount;

  ivaAmount: InvoiceAmount;
  recAmount: InvoiceAmount;
  retentionAmount: InvoiceAmount;

  taxesAmount: InvoiceAmount;

  transferredTaxesAmount: InvoiceAmount;
  netTaxesAmount: InvoiceAmount;

  totalAmount: InvoiceAmount;
}

interface ISupplierInvoice {
  companyId: UniqueID;
  status: SupplierInvoiceStatus;

  supplierInvoiceCategoryId: UniqueID;

  supplierId: UniqueID;

  invoiceNumber: string;
  invoiceDate: UtcDate;
  dueDate: Maybe<UtcDate>;

  description: Maybe<string>;
  notes: Maybe<string>;

  paymentMethod: Maybe<InvoicePaymentMethod>;

  currencyCode: CurrencyCode;
  languageCode: LanguageCode;

  sourceType: SupplierInvoiceSourceType;
  documentId: Maybe<UniqueID>;

  version: number;

  taxes: SupplierInvoiceTaxes;
  totals(): ISupplierInvoiceTotals;
}

export type SupplierInvoicePatchProps = Partial<
  Omit<ISupplierInvoiceCreateProps, "companyId" | "status" | "sourceType" | "version">
>;

export type InternalSupplierInvoiceProps = Omit<ISupplierInvoiceCreateProps, "version"> & {
  version: number;
};

/**
 * Aggregate raíz de factura de proveedor.
 *
 * Reglas MVP:
 * - supplierId requerido
 * - invoiceNumber requerido
 * - invoiceDate requerido
 * - totalAmount > 0
 * - companyId requerido
 * - editable en cualquier estado
 *
 * Notas:
 * - create() aplica validaciones de negocio de alta.
 * - rehydrate() reconstruye desde persistencia sin revalidar.
 */
export class SupplierInvoice
  extends AggregateRoot<InternalSupplierInvoiceProps>
  implements ISupplierInvoice
{
  private constructor(props: InternalSupplierInvoiceProps, id?: UniqueID) {
    super(props, id);
  }

  public static create(
    props: ISupplierInvoiceCreateProps,
    id?: UniqueID
  ): Result<SupplierInvoice, Error> {
    const validationResult = SupplierInvoice.validateCreateProps(props);

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

    const supplierInvoice = new SupplierInvoice(
      {
        ...props,
        status: props.status ?? SupplierInvoiceStatus.draft(),
        version: props.version ?? 1,
      },
      id
    );

    return Result.ok(supplierInvoice);
  }

  /**
   * Reconstruye el agregado desde persistencia.
   *
   * Debe usarse exclusivamente desde infraestructura.
   */
  public static rehydrate(props: InternalSupplierInvoiceProps, id: UniqueID): SupplierInvoice {
    return new SupplierInvoice(props, id);
  }

  public get companyId(): UniqueID {
    return this.props.companyId;
  }

  public get supplierId(): UniqueID {
    return this.props.supplierId;
  }

  public get invoiceNumber(): string {
    return this.props.invoiceNumber;
  }

  public get invoiceDate(): UtcDate {
    return this.props.invoiceDate;
  }

  public get currencyCode(): CurrencyCode {
    return this.props.currencyCode;
  }

  public get languageCode(): LanguageCode {
    return this.props.languageCode;
  }

  public get taxes(): SupplierInvoiceTaxes {
    return this.props.taxes;
  }

  public get status(): SupplierInvoiceStatus {
    return this.props.status;
  }

  public get sourceType(): SupplierInvoiceSourceType {
    return this.props.sourceType;
  }

  public get documentId(): Maybe<UniqueID> {
    return this.props.documentId;
  }

  public get version(): number {
    return this.props.version;
  }

  public get description(): Maybe<string> {
    return this.props.description;
  }

  public get notes(): Maybe<string> {
    return this.props.notes;
  }

  public get paymentMethod(): Maybe<InvoicePaymentMethod> {
    return this.props.paymentMethod;
  }

  public get dueDate(): Maybe<UtcDate> {
    return this.props.dueDate;
  }

  public get supplierInvoiceCategoryId(): UniqueID {
    return this.props.supplierInvoiceCategoryId;
  }

  public totals(): ISupplierInvoiceTotals {
    return {
      taxableAmount: this.taxes.getTaxableAmount(),

      ivaAmount: this.taxes.getIvaAmount(),
      recAmount: this.taxes.getRecAmount(),
      retentionAmount: this.taxes.getRetentionAmount(),

      taxesAmount: this.taxes.getTaxesAmount(),

      transferredTaxesAmount: this.taxes.getTransferredTaxesAmount(),
      netTaxesAmount: this.taxes.getNetTaxesAmount(),

      totalAmount: this.taxes.getTotalAmount(),
    } as const;
  }

  /**
   * Actualiza campos editables del agregado.
   *
   * Regla MVP:
   * - la factura es editable en cualquier estado
   *
   * Notas:
   * - no permite alterar companyId, status, sourceType ni version externamente
   * - incrementa version tras mutación válida
   */
  public update(patch: SupplierInvoicePatchProps): Result<void, Error> {
    const candidateProps: InternalSupplierInvoiceProps = {
      ...this.props,
      ...patch,
      version: this.props.version + 1,
    };

    // Validacciones

    Object.assign(this.props, candidateProps);

    return Result.ok();
  }

  /**
   * Marca la factura como confirmada.
   */
  public confirm(): Result<void, Error> {
    if (this.props.status === SupplierInvoiceStatus.confirmed()) {
      return Result.ok();
    }

    this.props.status = SupplierInvoiceStatus.confirmed();
    this.incrementVersion();

    return Result.ok();
  }

  /**
   * Marca la factura como cancelada.
   */
  public cancel(): Result<void, Error> {
    if (this.props.status === SupplierInvoiceStatus.cancelled()) {
      return Result.ok();
    }

    this.props.status = SupplierInvoiceStatus.cancelled();
    this.incrementVersion();

    return Result.ok();
  }

  private incrementVersion(): void {
    this.props.version += 1;
  }

  private static validateCreateProps(props: ISupplierInvoiceCreateProps): Result<void, Error> {
    if (props.dueDate.isSome() && props.dueDate.unwrap() < props.invoiceDate) {
      return Result.fail(
        new Error("La fecha de vencimiento no puede ser anterior a la fecha de factura")
      );
    }
    /*if (!props.companyId?.trim()) {
      return Result.fail(new InvalidSupplierInvoiceCompanyError());
    }

    if (!props.supplierId?.trim()) {
      return Result.fail(new InvalidSupplierInvoiceSupplierError());
    }

    if (!props.invoiceNumber?.trim()) {
      return Result.fail(new InvalidSupplierInvoiceNumberError());
    }

    if (!(props.invoiceDate instanceof Date) || Number.isNaN(props.invoiceDate.getTime())) {
      return Result.fail(new InvalidSupplierInvoiceDateError());
    }

    if (props.totalAmount <= 0) {
      return Result.fail(new InvalidSupplierInvoiceAmountError());
    }*/

    return Result.ok();
  }
}