import { act, renderHook } from "@testing-library/react";
import { beforeEach, expect, it, vi } from "vitest";
import { getSelectedSpeechVoice, getSpeechVoiceDescription, getSpeechVoiceName, setSelectedSpeechVoice, SPEECH_VOICE_STORAGE_KEY, useSelectedSpeechVoice } from "./speech-voices";

beforeEach(() => setSelectedSpeechVoice(""));

it("shares a saved voice across selectors and restores it from browser storage", () => {
  const first = renderHook(useSelectedSpeechVoice);
  const second = renderHook(useSelectedSpeechVoice);
  act(() => setSelectedSpeechVoice("zh-CN-YunyangNeural"));
  expect(first.result.current).toBe("zh-CN-YunyangNeural");
  expect(second.result.current).toBe("zh-CN-YunyangNeural");
  expect(localStorage.getItem(SPEECH_VOICE_STORAGE_KEY)).toBe("zh-CN-YunyangNeural");
  act(() => {
    localStorage.setItem(SPEECH_VOICE_STORAGE_KEY, "zh-CN-XiaoyiNeural");
    window.dispatchEvent(new StorageEvent("storage", { key: SPEECH_VOICE_STORAGE_KEY }));
  });
  expect(first.result.current).toBe("zh-CN-XiaoyiNeural");
  first.unmount(); second.unmount();
});

it("ignores malformed stored values and resets to the server default", () => {
  localStorage.setItem(SPEECH_VOICE_STORAGE_KEY, "unsafe<xml>");
  expect(getSelectedSpeechVoice()).toBe("");
  localStorage.setItem(SPEECH_VOICE_STORAGE_KEY, "en-US-AriaNeural");
  expect(getSelectedSpeechVoice()).toBe("");
  setSelectedSpeechVoice("zh-CN-YunyangNeural");
  setSelectedSpeechVoice("");
  expect(getSelectedSpeechVoice()).toBe("");
  expect(localStorage.getItem(SPEECH_VOICE_STORAGE_KEY)).toBeNull();
});

it("provides Chinese labels and gender descriptions for Mandarin voices", () => {
  const voice = { id: "zh-CN-YunyangNeural", name: "Yunyang", locale: "zh-CN" as const, gender: "Male" as const };
  expect(getSpeechVoiceName(voice)).toBe("云扬");
  expect(getSpeechVoiceDescription(voice)).toContain("男声");
  expect(getSpeechVoiceDescription(voice)).toContain("普通话");
});

it("keeps the choice for this page if browser storage cannot be written", () => {
  const write = vi.spyOn(Storage.prototype, "setItem").mockImplementation(() => { throw new Error("quota exceeded"); });
  try {
    setSelectedSpeechVoice("zh-CN-YunyangNeural");
    expect(getSelectedSpeechVoice()).toBe("zh-CN-YunyangNeural");
  } finally {
    write.mockRestore();
    setSelectedSpeechVoice("");
  }
});