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";

/**
 * cancelIncomingPayment — cancel a DRAFT incoming payment.
 *
 * Cancellation discards an unposted payment (its draft settlements are kept as
 * append-only history) and moves it DRAFT -> CANCELLED. It never touches the
 * general ledger — a POSTED payment must be reversed (reverseIncomingPayment),
 * not cancelled. `id` is the IncomingPayment id. This is the AR mirror of
 * `cancelOutgoingPayment`.
 */
export default createResolver({
  name: "cancelIncomingPayment",
  operation: "mutation",
  input: {
    id: t.string().description("Incoming payment ID"),
  },
  body: async (context) => {
    const ctx = createContext(context);
    const db = getDB("main-db");
    return db
      .transaction()
      .execute(async (trx) => {
        const result = await arModulesExport.commands.cancelIncomingPayment(
          trx,
          { id: context.input.id },
          ctx,
        );

        if (!result.ok) {
          switch (result.error.code) {
            case "ACCOUNT_RECEIVABLE_INCOMING_PAYMENT_NOT_FOUND":
              throw new DomainError(`Incoming payment not found: ${context.input.id}`);
            case "ACCOUNT_RECEIVABLE_INCOMING_PAYMENT_INVALID_STATUS":
              throw new DomainError(`Only a DRAFT payment can be cancelled: ${context.input.id}`);
            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.incomingPayment.id,
          status: result.value.incomingPayment.status,
        };
      })
      .catch((err: unknown) => {
        if (err instanceof DomainError) throw err;
        throw new Error("Failed to cancel the incoming payment", { cause: err });
      });
  },
  output: t
    .object({
      id: t.string().description("Cancelled incoming payment ID"),
      status: t.string().description("Lifecycle status (CANCELLED after cancellation)"),
    })
    .description("Cancelled incoming payment"),
});