import { describe, it, expect } from "vitest";
import {
  getLogicalToday,
  getLogicalYesterday,
  isWithinGraceWindow,
} from "./day-boundary";

describe("day-boundary", () => {
  it("returns calendar date when boundary is midnight and after noon", () => {
    const now = new Date(2026, 5, 26, 14, 0, 0);
    expect(getLogicalToday(0, now)).toBe("2026-06-26");
  });

  it("returns previous calendar date when before boundary hour", () => {
    const now = new Date(2026, 5, 26, 1, 30, 0);
    expect(getLogicalToday(2, now)).toBe("2026-06-25");
  });

  it("returns current date when at or after boundary hour", () => {
    const now = new Date(2026, 5, 26, 2, 30, 0);
    expect(getLogicalToday(2, now)).toBe("2026-06-26");
  });

  it("computes logical yesterday", () => {
    const now = new Date(2026, 5, 26, 14, 0, 0);
    expect(getLogicalYesterday(0, now)).toBe("2026-06-25");
  });

  it("detects grace window after midnight", () => {
    const now = new Date(2026, 5, 26, 1, 0, 0);
    expect(isWithinGraceWindow(0, 4, now)).toBe(true);
  });

  it("is outside grace window mid-day", () => {
    const now = new Date(2026, 5, 26, 14, 0, 0);
    expect(isWithinGraceWindow(0, 4, now)).toBe(false);
  });
});