import { describe, expect, it } from "vitest";
import {
  CHIP_PER_XP,
  CHIP_TOP_UP_COOLDOWN_MS,
  CHIP_TOP_UP_THRESHOLD,
  chipTopUpState,
  chipsForXp,
} from "@/lib/minigames/chips";

describe("chipsForXp", () => {
  it("converts XP to chips at the fixed rate", () => {
    expect(CHIP_PER_XP).toBe(10);
    expect(chipsForXp(1)).toBe(10);
    expect(chipsForXp(5)).toBe(50);
    expect(chipsForXp(50)).toBe(500);
  });

  it("rounds fractional XP to whole chips", () => {
    expect(chipsForXp(0.5)).toBe(5);
    expect(chipsForXp(1.25)).toBe(13);
  });

  it("never returns negative chips", () => {
    expect(chipsForXp(0)).toBe(0);
    expect(chipsForXp(-3)).toBe(0);
    expect(chipsForXp(Number.NaN)).toBe(0);
    expect(chipsForXp(Number.POSITIVE_INFINITY)).toBe(0);
  });
});

describe("chipTopUpState", () => {
  const NOW = 1_700_000_000_000;

  it("is claimable for a first-time broke player (no refill timestamp)", () => {
    const state = chipTopUpState(0, null, NOW);
    expect(state.topUpAvailable).toBe(true);
    expect(state.nextTopUpAt).toBeNull();
  });

  it("is not claimable while the pool holds the threshold or more", () => {
    expect(chipTopUpState(CHIP_TOP_UP_THRESHOLD, null, NOW).topUpAvailable).toBe(false);
    expect(chipTopUpState(1500, null, NOW).topUpAvailable).toBe(false);
  });

  it("is claimable below the threshold even with a stale refill", () => {
    const stale = new Date(NOW - CHIP_TOP_UP_COOLDOWN_MS - 1).toISOString();
    const state = chipTopUpState(499, stale, NOW);
    expect(state.topUpAvailable).toBe(true);
    expect(state.nextTopUpAt).toBeNull();
  });

  it("is locked during the cooldown window and reports when it unlocks", () => {
    const recent = new Date(NOW - 60_000).toISOString();
    const state = chipTopUpState(0, recent, NOW);
    expect(state.topUpAvailable).toBe(false);
    expect(state.nextTopUpAt).toBe(new Date(NOW - 60_000 + CHIP_TOP_UP_COOLDOWN_MS).toISOString());
  });

  it("unlocks the moment the cooldown expires", () => {
    const boundary = new Date(NOW - CHIP_TOP_UP_COOLDOWN_MS).toISOString();
    expect(chipTopUpState(0, boundary, NOW).topUpAvailable).toBe(true);
  });

  it("treats an unparseable refill timestamp as never refilled", () => {
    const state = chipTopUpState(0, "not-a-date", NOW);
    expect(state.topUpAvailable).toBe(true);
    expect(state.nextTopUpAt).toBeNull();
  });
});