/// <reference types="temporal-polyfill/global" />

/**
 * Utils for working with Temporal.ZonedDateTime
 * @module
 */
import * as Number from "../Number.js";

if (!("Temporal" in globalThis)) {
  throw new Error("cannot use the temporal functions without the Temporal API");
}

const createComparator =
  (predicate: (a: number, result: number) => boolean) =>
  (a: Temporal.ZonedDateTime, b: Temporal.ZonedDateTime) => {
    return predicate(Temporal.ZonedDateTime.compare(a, b), 0);
  };

/**
 * whether a is equal to b
 */
export const eq = createComparator(Number.eq);
/**
 * whether a is less then b
 */
export const lt = createComparator(Number.lt);
/**
 * whether a is less then or equal to b
 */
export const lte = createComparator(Number.lte);
/**
 * whether a is more then b
 */
export const gt = createComparator(Number.gt);
/**
 * whether a is more then or equal to b
 */
export const gte = createComparator(Number.gte);