import { content } from "@deadhead/content";
import { describe, expect, it } from "vitest";
import { routeDistance, travelTimeGameHours } from "../src/index";

const courier = content.shipModel("courier")!;
const freighter = content.shipModel("freighter")!;

describe("travel time", () => {
  it("matches a hand calculation", () => {
    // 150M km at 2M km/h = 75 h cruise, plus 4 h overhead.
    expect(travelTimeGameHours(freighter, 150)).toBe(79);
  });

  it("gets a faster ship there sooner on the same route", () => {
    for (const distance of [0.384, 50, 400]) {
      expect(travelTimeGameHours(courier, distance)).toBeLessThan(
        travelTimeGameHours(freighter, distance),
      );
    }
  });

  it("is mostly overhead for a Courier on Earth→Moon", () => {
    const t = Date.parse("2100-01-01T00:00:00Z");
    const distance = routeDistance(content.location("earth")!, content.location("moon")!, t);
    const total = travelTimeGameHours(courier, distance);
    expect(courier.overheadGameHours).toBeGreaterThan(total / 2);
  });
});