import { describe, expect, it } from "vitest";
import { calculateFreshness, freshnessStatus } from "@/domain/freshness";

describe("freshness scoring", () => {
  const asOf = new Date("2026-07-25T12:00:00Z");

  it("returns a fresh score for recently received stock", () => {
    expect(calculateFreshness("2026-07-23T12:00:00Z", 10, asOf)).toMatchObject({
      ageDays: 2,
      remainingDays: 8,
      score: 80,
      status: "fresh",
    });
  });

  it("marks the threshold states consistently", () => {
    expect(freshnessStatus(45)).toBe("watch");
    expect(freshnessStatus(20)).toBe("at_risk");
    expect(freshnessStatus(0)).toBe("expired");
  });

  it("never emits a negative freshness score", () => {
    expect(calculateFreshness("2026-07-01T12:00:00Z", 7, asOf).score).toBe(0);
  });
});