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

export default createResolver({
  name: "submitPurchaseOrder",
  operation: "mutation",
  input: {
    id: t.string().description("Purchase order ID"),
  },
  body: async (context) => {
    const ctx = createContext(context);
    const db = getDB("main-db");
    return db
      .transaction()
      .execute(async (trx) => {
        const result = await purchaseModules.commands.submitPurchaseOrder(
          trx,
          { id: context.input.id },
          ctx,
        );

        if (!result.ok) {
          switch (result.error.code) {
            case "PURCHASE_PURCHASE_ORDER_NOT_FOUND":
              throw new DomainError(`Purchase order not found: ${context.input.id}`);
            case "PURCHASE_PURCHASE_ORDER_NOT_DRAFT":
              throw new DomainError(`Purchase order is not in DRAFT status: ${context.input.id}`);
            case "PURCHASE_EMPTY_PURCHASE_ORDER_LINES":
              throw new DomainError("Purchase order has no lines");
            // NOTE: erp-kit historically defined
            // PURCHASE_DUPLICATE_EXTERNAL_SUPPLIER_ORDER_REFERENCE here, enforcing
            // per-company uniqueness of externalSupplierOrderReference at submit
            // time. DT deliberately reuses external references across POs and the
            // field carries no DB constraint, so that guard was wrong for us
            // (see DT IMS #717). erp-kit#738 removed the guard entirely in
            // erp-kit 0.42.0, so the error no longer exists and there is
            // intentionally no case for it. (Before 0.42.0 the guard was stripped
            // via a local pnpm patch, now retired.)
            case "PURCHASE_SUPPLIER_NOT_FOUND":
              throw new DomainError(`Supplier account not found: ${result.error.message}`);
            case "PURCHASE_SUPPLIER_NOT_ACTIVE":
              throw new DomainError(
                `Supplier account or its business partner is not active: ${result.error.message}`,
              );
            case "PURCHASE_SUPPLIER_ACCOUNT_COMPANY_MISMATCH":
              throw new DomainError("The supplier account belongs to a different company.");
            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.purchaseOrderId,
          // A successful transition implies the target status.
          status: "SUBMITTED",
        };
      })
      .catch((err: unknown) => {
        if (err instanceof DomainError) throw err;
        throw new Error("Failed to submit the purchase order", { cause: err });
      });
  },
  output: t
    .object({
      id: t.string().description("Purchase order ID"),
      status: t.string().description("New order status"),
    })
    .description("SubmitPurchaseOrder response"),
});