import { err, ok, type CommandContext } from "@tailor-platform/erp-kit/core";
import type { Transaction } from "../generated/kysely-tailordb";
import { ItemNotPurchasableError } from "../lib/errors.generated";
import {
  createPurchaseItemRepository,
  type PurchaseItemRepository,
} from "../repository/purchaseItemRepository";

export interface DeletePurchaseItemInput {
  itemId: string;
}

export async function run(
  db: Transaction,
  input: DeletePurchaseItemInput,
  _ctx: CommandContext,
  repositoryFactory: (db: Transaction) => PurchaseItemRepository = createPurchaseItemRepository,
) {
  const repository = repositoryFactory(db);
  const purchaseItem = await repository.findByItemId(input.itemId, { forUpdate: true });
  if (!purchaseItem) {
    return err(new ItemNotPurchasableError(input.itemId));
  }

  // Purchase orders reference the item, not this record, so withdrawing the
  // adoption leaves ordered documents receivable and billable.
  await repository.deleteByItemId(input.itemId);
  return ok({ purchaseItemId: purchaseItem.id });
}