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

export default createResolver({
  name: "updateItem",
  operation: "mutation",
  input: {
    id: t.string().description("Item ID"),
    name: t.string({ optional: true }).description("Item name"),
    barcode: t.string({ optional: true }).description("Item barcode"),
  },
  body: async (context) => {
    const ctx = createContext(context);
    const db = getDB("main-db");
    return db
      .transaction()
      .execute(async (trx) => {
        const result = await imModulesExport.commands.updateItem(
          trx,
          {
            id: context.input.id,
            name: context.input.name ?? undefined,
            barcode: context.input.barcode ?? undefined,
          },
          ctx,
        );

        if (!result.ok) {
          switch (result.error.code) {
            case "ITEM_MANAGEMENT_ITEM_NOT_FOUND":
              throw new DomainError(`Item not found: ${context.input.id}`);
            case "ITEM_MANAGEMENT_NO_FIELDS_TO_UPDATE":
              throw new DomainError("No fields provided to update");
            case "ITEM_MANAGEMENT_DUPLICATE_BARCODE":
              throw new DomainError(`Barcode already in use: ${context.input.barcode}`);
            case "ITEM_MANAGEMENT_UNIT_NOT_FOUND":
              throw new DomainError("A referenced unit was not found.");
            case "ITEM_MANAGEMENT_UOM_LOCKED":
              throw new DomainError("The item's unit of measure is locked and cannot be changed.");
            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.item.id };
      })
      .catch((err: unknown) => {
        if (err instanceof DomainError) throw err;
        throw new Error("Failed to update the item", { cause: err });
      });
  },
  output: t
    .object({
      id: t.string().description("Updated item ID"),
    })
    .description("Updated item"),
});