import { createContext, DomainError } from "@tailor-platform/erp-kit/app";
import { createResolver, t } from "@tailor-platform/sdk";
import { getDB } from "@/generated/kysely-tailordb";
import { arModulesExport } from "@/modules";

/**
 * cancelAccountReceivableDocument — cancel a DRAFT or REGISTERED customer
 * invoice.
 *
 * Cancellation discards an invoice that has not yet been posted and moves it
 * DRAFT/REGISTERED -> CANCELLED. It never touches the general ledger — a POSTED
 * invoice must be corrected (correctAccountReceivableDocument), not cancelled.
 * When a REGISTERED invoice is cancelled the linked sales order's billing status
 * is recalculated in the same transaction. `id` is the AccountReceivableDocument
 * id.
 */
export default createResolver({
  name: "cancelAccountReceivableDocument",
  operation: "mutation",
  input: {
    id: t.string().description("Account receivable document ID"),
  },
  body: async (context) => {
    const ctx = createContext(context);
    const db = getDB("main-db");
    return db
      .transaction()
      .execute(async (trx) => {
        const result = await arModulesExport.commands.cancelAccountReceivableDocument(
          trx,
          { id: context.input.id },
          ctx,
        );

        if (!result.ok) {
          switch (result.error.code) {
            case "ACCOUNT_RECEIVABLE_DOCUMENT_NOT_FOUND":
              throw new DomainError(`Account receivable document not found: ${context.input.id}`);
            case "ACCOUNT_RECEIVABLE_INVALID_DOCUMENT_STATUS":
              throw new DomainError(
                `Only DRAFT or REGISTERED invoices can be cancelled: ${context.input.id}`,
              );
            case "ACCOUNT_RECEIVABLE_SALES_ORDER_BILLING_SYNC_FAILED":
              throw new DomainError(
                `Failed to sync sales order billing status: ${result.error.message}`,
              );
            case "UNAUTHENTICATED":
              throw new DomainError("Authentication is required");
            case "INSUFFICIENT_PERMISSION":
              throw new DomainError("You do not have permission to perform this action");
            default:
              throw result.error satisfies never;
          }
        }

        return {
          id: result.value.accountReceivableDocument.id,
          status: result.value.accountReceivableDocument.status,
        };
      })
      .catch((err: unknown) => {
        if (err instanceof DomainError) throw err;
        throw new Error("Failed to cancel the account receivable document", { cause: err });
      });
  },
  output: t
    .object({
      id: t.string().description("Account receivable document ID"),
      status: t.string().description("New document status (CANCELLED)"),
    })
    .description("CancelAccountReceivableDocument response"),
});