import {
  type CommonReservedFields,
  type NoReservedFields,
  defaultGqlPermission,
  defaultPermission,
} from "@tailor-platform/erp-kit/core";
import { db, type TailorAnyDBField, type TailorAnyDBType } from "@tailor-platform/sdk";

const builtins = (params: { itemType?: TailorAnyDBType }) => {
  const itemId = db
    .uuid()
    .unique()
    .description("Foreign key to the item-management Item this record adopts");
  return {
    itemId: params.itemType
      ? itemId.relation({
          type: "1-1",
          toward: { type: params.itemType, as: "item" },
          backward: "purchaseItem",
        })
      : itemId,
    requiresPhysicalReceipt: db
      .bool()
      .description("Whether ordering this item is expected to produce a goods receipt"),
  };
};

type ReservedFields = keyof ReturnType<typeof builtins> | CommonReservedFields;

export interface CreatePurchaseItemTypeParams<F extends Record<string, TailorAnyDBField>> {
  fields?: NoReservedFields<F, ReservedFields>;
  itemType?: TailorAnyDBType;
}

export function createPurchaseItemType<const F extends Record<string, TailorAnyDBField>>(
  params: CreatePurchaseItemTypeParams<F>,
) {
  return db
    .table("PurchaseItem", {
      ...builtins(params),
      ...((params.fields ?? {}) as F),
      ...db.fields.timestamps(),
    })
    .permission(defaultPermission)
    .gqlPermission(defaultGqlPermission);
}

export const purchaseItem = createPurchaseItemType({});