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: "createPurchaseItem",
  operation: "mutation",
  input: {
    itemId: t.string().description("Item to adopt for purchasing"),
    requiresPhysicalReceipt: t
      .bool()
      .description("Whether ordering this item is expected to produce a goods receipt"),
  },
  body: async (context) => {
    const ctx = createContext(context);
    const db = getDB("main-db");
    return db
      .transaction()
      .execute(async (trx) => {
        const result = await purchaseModules.commands.createPurchaseItem(
          trx,
          {
            itemId: context.input.itemId,
            requiresPhysicalReceipt: context.input.requiresPhysicalReceipt,
          },
          ctx,
        );

        if (!result.ok) {
          switch (result.error.code) {
            case "PURCHASE_ITEM_NOT_FOUND":
              throw new DomainError(`Item not found: ${context.input.itemId}`);
            case "PURCHASE_DUPLICATE_PURCHASE_ITEM":
              throw new DomainError(
                `Item already has a purchasing record: ${context.input.itemId}`,
              );
            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.purchaseItemId };
      })
      .catch((err: unknown) => {
        if (err instanceof DomainError) throw err;
        throw new Error("Failed to adopt the item for purchasing", { cause: err });
      });
  },
  // Entity-typed so clients can select PurchaseItem fields off the result.
  output: t.object({ id: t.uuid() }).typeName(purchaseModules.db.purchaseItem.name),
});