import { gameConfig } from "@deadhead/content";
import { describe, expect, it } from "vitest";
import { MS_PER_HOUR, MS_PER_MINUTE, gameToReal, realToGame } from "../src/index";

const realStart = Date.parse(gameConfig.epoch.realStart);
const gameStart = Date.parse(gameConfig.epoch.gameStart);

describe("game clock", () => {
  it("maps the real epoch to the game epoch", () => {
    expect(realToGame(realStart, gameConfig)).toBe(gameStart);
  });

  it("round-trips real → game → real", () => {
    for (const real of [realStart, realStart + 12_345_678, Date.parse("2027-06-15T08:30:00Z")]) {
      expect(gameToReal(realToGame(real, gameConfig), gameConfig)).toBe(real);
    }
  });

  it("advances one game hour per real minute at compression 60", () => {
    expect(gameConfig.timeCompression).toBe(60);
    expect(realToGame(realStart + MS_PER_MINUTE, gameConfig)).toBe(gameStart + MS_PER_HOUR);
  });
});