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

const builtins = (params: { itemType?: TailorAnyDBType; companyType?: TailorAnyDBType }) => {
  const itemId = db.uuid().description("Foreign key to Item");
  const companyId = db.uuid().description("Foreign key to Company");
  return {
    itemId: params.itemType
      ? itemId.relation({
          type: "n-1",
          toward: { type: params.itemType, as: "item" },
          backward: "costLayers",
        })
      : itemId,
    companyId: params.companyType
      ? companyId.relation({
          type: "n-1",
          toward: { type: params.companyType, as: "company" },
          backward: "costLayers",
        })
      : companyId,
    ledgerEntryId: db
      .uuid()
      .relation({
        type: "n-1",
        toward: { type: inventoryLedger, as: "ledgerEntry" },
        backward: "costLayers",
      })
      .description("IN ledger entry that received the stock this layer tracks"),
    effectiveDate: db
      .date()
      .description("Movement date of the receipt; determines the FIFO consumption order"),
    quantity: db.decimal().description("Received quantity"),
    remainingQuantity: db.decimal().description("Unconsumed quantity"),
  };
};

export function createCostLayerType(params: {
  itemType?: TailorAnyDBType;
  companyType?: TailorAnyDBType;
}) {
  return db
    .table("CostLayer", {
      ...builtins(params),
      ...db.fields.timestamps(),
    })
    .indexes({
      fields: ["itemId", "companyId", "effectiveDate"],
      name: "cost_layer_item_company_effective_idx",
    })
    .permission(defaultPermission)
    .gqlPermission(defaultGqlPermission);
}

export const costLayer = createCostLayerType({});