import { describe, it, expect } from "vitest";
import { z } from "zod";
import { DateTime } from "luxon";

/**
 * Regression test for the "Invalid datetime" error.
 *
 * Earlier the action used `z.string().datetime()` (strict — UTC `Z` only).
 * Luxon's `dt.toISO()` produces an offset-suffixed form like
 * `2026-05-10T09:00:00.000+08:00`, which the strict validator rejects.
 * The fix uses `.datetime({ offset: true })`.
 *
 * If this test ever fails again it means the schema regressed and any
 * Asia/Kuala_Lumpur reminder will be rejected at submit.
 */
describe("createReminderAction Zod schema (datetime validator)", () => {
  const offsetIso = DateTime.fromISO("2026-05-10T09:00:00", { zone: "Asia/Kuala_Lumpur" }).toISO()!;
  const utcIso = DateTime.fromISO("2026-05-10T09:00:00", { zone: "UTC" }).toISO()!;

  it("strict .datetime() (no options) rejects offset-suffixed ISO — that was the bug", () => {
    const strict = z.string().datetime();
    expect(strict.safeParse(offsetIso).success).toBe(false);
  });

  it(".datetime({ offset: true }) accepts both offset and UTC ISO — that's the fix", () => {
    const lenient = z.string().datetime({ offset: true });
    expect(lenient.safeParse(offsetIso).success).toBe(true);
    expect(lenient.safeParse(utcIso).success).toBe(true);
  });
});