/**
 * @file dateRange.test.ts
 * @description The Analytics range presets: `?range=` parsing, a preset's
 * local bounds (week from Monday, month from the 1st), a custom range, and the query params `applyRange` sets.
 * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
 */

import { describe, expect, it } from "vitest";
import { applyRange, parsePreset, rangeDates } from "../dateRange";

describe("dateRange", () => {
  const today = new Date(2026, 9, 5, 12); // local 2026-10-05

  it("parses presets, defaulting to all", () => {
    expect(parsePreset("30d")).toBe("30d");
    expect(parsePreset("1y")).toBe("all");
    expect(parsePreset(null)).toBe("all");
  });

  it("gives a preset's local bounds, today included", () => {
    expect(rangeDates("7d", {}, today)).toEqual({ from: "2026-09-29", to: "2026-10-05" });
    expect(rangeDates("90d", {}, today).from).toBe("2026-07-08");
    expect(rangeDates("all", {}, today)).toEqual({});
  });

  it("starts the week on Monday and the month on the 1st", () => {
    const wed = new Date(2026, 9, 7, 12);
    const sun = new Date(2026, 9, 11, 12);
    expect(rangeDates("today", {}, wed)).toEqual({ from: "2026-10-07", to: "2026-10-07" });
    expect(rangeDates("week", {}, wed)).toEqual({ from: "2026-10-05", to: "2026-10-07" });
    expect(rangeDates("week", {}, sun)).toEqual({ from: "2026-10-05", to: "2026-10-11" });
    expect(rangeDates("week", {}, today)).toEqual({ from: "2026-10-05", to: "2026-10-05" });
    expect(rangeDates("month", {}, wed)).toEqual({ from: "2026-10-01", to: "2026-10-07" });
    expect(rangeDates("custom", { from: "2026-01-01", to: "" }, today)).toEqual({
      from: "2026-01-01",
      to: undefined,
    });
  });

  it("sets from/to and tz_offset only when there is a bound", () => {
    expect(applyRange(new URLSearchParams(), {}).toString()).toBe("");
    const qs = applyRange(new URLSearchParams(), { from: "2026-01-01" });
    expect(qs.get("from")).toBe("2026-01-01");
    expect(qs.has("to")).toBe(false);
    expect(qs.get("tz_offset")).toBe(String(new Date().getTimezoneOffset()));
  });
});