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

export const SUPPLY_PLAN_SOURCE_TYPES = ["PURCHASE_ORDER", "TRANSFER_ORDER"] as const;

const builtins = (params: { itemType?: TailorAnyDBType; siteType?: TailorAnyDBType }) => {
  const itemId = db.uuid().description("Foreign key to Item");
  const siteId = db.uuid().description("Destination site for the expected supply");
  return {
    sourceType: db
      .enum(SUPPLY_PLAN_SOURCE_TYPES)
      .description("Source document type: PURCHASE_ORDER or TRANSFER_ORDER"),
    sourceId: db
      .uuid()
      .description(
        "ID of the source document (e.g., PurchaseOrder.id). Generic reference; not a typed foreign key.",
      ),
    sourceLineId: db
      .uuid()
      .description(
        "ID of the source supply line (e.g., PurchaseOrderLine.id). In the standard modules this is the unique source unit for one supply projection.",
      ),
    itemId: params.itemType
      ? itemId.relation({
          type: "n-1",
          toward: { type: params.itemType, as: "item" },
        })
      : itemId,
    siteId: params.siteType
      ? siteId.relation({
          type: "n-1",
          toward: { type: params.siteType, as: "site" },
        })
      : siteId,
    expectedQuantity: db
      .decimal()
      .description("Committed expected quantity for this ATP supply slice"),
    receivedQuantity: db
      .decimal()
      .description(
        "Cumulative quantity already received against this source line; open quantity is derived as expectedQuantity minus receivedQuantity",
      ),
    status: db
      .enum(inventorySupplyPlanLifecycle.states)
      .description(
        "Projection lifecycle status: OPEN while expected supply remains, CLOSED when it no longer contributes open supply",
      ),
    expectedDate: db.date().description("Latest expected receipt date from the source line"),
  };
};

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

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

export function createInventorySupplyPlanType<const F extends Record<string, TailorAnyDBField>>(
  params: CreateInventorySupplyPlanTypeParams<F>,
) {
  return db
    .table("InventorySupplyPlan", {
      ...builtins(params),
      ...((params.fields ?? {}) as F),
      ...db.fields.timestamps(),
    })
    .indexes(
      {
        fields: ["sourceType", "sourceLineId"],
        unique: true,
        name: "inventory_supply_plan_source_idx",
      },
      {
        fields: ["sourceType", "sourceId"],
        unique: false,
        name: "inventory_supply_plan_source_document_idx",
      },
    )
    .permission(defaultPermission)
    .gqlPermission(defaultGqlPermission);
}

export const inventorySupplyPlan = createInventorySupplyPlanType({});