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

const HOLIDAY_KINDS = ["STATUTORY", "PRESCRIBED"] as const;

const builtins = {
  // Intra-module FK: the HolidayCalendar this holiday belongs to. holidayDate is unique
  // per calendar (DUPLICATE_HOLIDAY_DATE, enforced at the command layer), so the same date
  // can be a holiday in one calendar and a working day in another.
  calendarId: db
    .uuid()
    .relation({
      type: "n-1",
      toward: { type: holidayCalendar, as: "calendar" },
      backward: "holidays",
    })
    .description("Foreign key to the HolidayCalendar this holiday belongs to"),
  holidayDate: db.date().description("The calendar date registered as a holiday"),
  // STATUTORY (statutory holiday) or PRESCRIBED (company holiday) — bound to premium/classification, never to name (ADR-015)
  holidayKind: db
    .enum(HOLIDAY_KINDS)
    .description("Normalized holiday kind: STATUTORY or PRESCRIBED"),
  name: db.string().description("Display name of the holiday"),
};

type ReservedFields = keyof typeof builtins | CommonReservedFields;

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

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

export const companyHoliday = createCompanyHolidayType({});