import { describe, expect, it } from "vitest";
import {
  BOSS_INDICATOR_DEATH_FADE_MS,
  BOSS_DEATH_DESPAWN_SECONDS,
  BOSS_DEATH_FADE_SECONDS,
  BOSS_DEATH_HOLD_SECONDS,
  advanceBossIndicatorOpacity,
  bossCanTrackTarget,
  bossDeathDespawnSeconds,
  bossDeathHoldSeconds,
  bossDeathOpacity,
  consumeBossIndicatorPatch,
  createBossIndicatorPatchState,
  updateBossIndicatorPatchState,
} from "./bossDeathVisuals";

describe("boss death visuals", () => {
  it("stops target tracking as soon as boss health reaches zero", () => {
    expect(bossCanTrackTarget(1)).toBe(true);
    expect(bossCanTrackTarget(0)).toBe(false);
    expect(bossCanTrackTarget(-1)).toBe(false);
  });

  it("fades mechanic indicators to zero over the death transition", () => {
    const halfway = advanceBossIndicatorOpacity(1, true, BOSS_INDICATOR_DEATH_FADE_MS / 2_000);
    expect(halfway).toBeCloseTo(0.5);
    expect(advanceBossIndicatorOpacity(halfway, true, BOSS_INDICATOR_DEATH_FADE_MS / 2_000)).toBe(0);
    expect(advanceBossIndicatorOpacity(0.4, false, 1 / 60)).toBe(1);
  });

  it("patches indicator meshes once per defeat, including a replacement boss", () => {
    let state = createBossIndicatorPatchState(false);
    expect(state.pending).toBe(false);

    state = updateBossIndicatorPatchState(state, true);
    expect(state.pending).toBe(true);
    state = consumeBossIndicatorPatch(state);
    expect(state.pending).toBe(false);
    expect(updateBossIndicatorPatchState(state, true)).toBe(state);

    state = updateBossIndicatorPatchState(state, false);
    expect(state.pending).toBe(false);
    state = updateBossIndicatorPatchState(state, true);
    expect(state.pending).toBe(true);
  });

  it("holds the death pose for a few seconds, then fades the model", () => {
    expect(bossDeathOpacity(BOSS_DEATH_HOLD_SECONDS)).toBe(1);
    expect(bossDeathOpacity(BOSS_DEATH_HOLD_SECONDS + BOSS_DEATH_FADE_SECONDS / 2)).toBeCloseTo(0.5);
    expect(bossDeathOpacity(BOSS_DEATH_DESPAWN_SECONDS)).toBe(0);
  });

  it("keeps Gravehorn visible through its full authored fall", () => {
    const hold = bossDeathHoldSeconds("gravehorn-triceratops");
    expect(hold).toBeGreaterThan(5.73);
    expect(bossDeathOpacity(5.73, "gravehorn-triceratops")).toBe(1);
    expect(bossDeathOpacity(bossDeathDespawnSeconds("gravehorn-triceratops"), "gravehorn-triceratops")).toBe(0);
  });
});