import { describe, it, expect } from "vitest";
import { quickToDate, buildCustomDate, formatCustomDay } from "./time-parsing.js";

describe("quickToDate", () => {
  it("now returns ~30s ahead", () => {
    const d = quickToDate("now");
    const diffMs = d.getTime() - Date.now();
    expect(diffMs).toBeGreaterThan(20 * 1000);
    expect(diffMs).toBeLessThan(40 * 1000);
  });
  it("tomorrow_9am returns a future Date", () => {
    const d = quickToDate("tomorrow_9am");
    expect(d.getTime()).toBeGreaterThan(Date.now());
  });
});

describe("buildCustomDate", () => {
  it("rejects in-past day/hour/minute", () => {
    const r = buildCustomDate(-1, 9, 0, "Asia/Kuala_Lumpur");
    expect(r.ok).toBe(false);
    if (!r.ok) expect(r.reason).toMatch(/past/i);
  });
  it("accepts a far-future combination", () => {
    const r = buildCustomDate(7, 23, 45, "Asia/Kuala_Lumpur");
    expect(r.ok).toBe(true);
  });
});

describe("formatCustomDay", () => {
  it("returns 'Today (...)' for offset 0", () => {
    expect(formatCustomDay(0, "Asia/Kuala_Lumpur")).toMatch(/^Today/);
  });
  it("returns 'Tomorrow (...)' for offset 1", () => {
    expect(formatCustomDay(1, "Asia/Kuala_Lumpur")).toMatch(/^Tomorrow/);
  });
});