import { check } from '@tauri-apps/plugin-updater';
import { afterEach, describe, expect, it, vi } from 'vitest';

vi.mock('@tauri-apps/plugin-updater', () => ({ check: vi.fn() }));

const checkMock = vi.mocked(check);

type FakeDownloadEvent =
  | { event: 'Started'; data: { contentLength?: number } }
  | { event: 'Progress'; data: { chunkLength: number } }
  | { event: 'Finished' };

function fakeUpdate() {
  return {
    version: '99.0.0',
    currentVersion: '0.1.47',
    body: '修复与改进',
    downloadAndInstall: vi.fn(
      async (onEvent: (event: FakeDownloadEvent) => void) => {
        onEvent({ event: 'Started', data: { contentLength: 100 } });
        onEvent({ event: 'Progress', data: { chunkLength: 40 } });
        onEvent({ event: 'Progress', data: { chunkLength: 60 } });
        onEvent({ event: 'Finished' });
      },
    ),
  };
}

function stubTauriWindow() {
  const invoke = vi.fn(async () => undefined);
  vi.stubGlobal('window', { __TAURI__: { core: { invoke } } });
  return invoke;
}

afterEach(() => {
  vi.unstubAllEnvs();
  vi.unstubAllGlobals();
  vi.resetModules();
  checkMock.mockReset();
});

describe('AGC 客户端更新', () => {
  it('开发态开关关闭时不请求清单', async () => {
    vi.stubEnv('VITE_AGC_ENABLE_APP_UPDATE_CHECK', '0');
    vi.resetModules();
    const { checkForAppUpdate, resetAppUpdateCheckForTests } = await import(
      '../src/services/appUpdate'
    );

    await expect(checkForAppUpdate()).resolves.toBeNull();
    expect(checkMock).not.toHaveBeenCalled();
    resetAppUpdateCheckForTests();
  });

  it('开关打开时把插件返回的更新映射给界面，且同一生命周期只查一次', async () => {
    vi.stubEnv('VITE_AGC_ENABLE_APP_UPDATE_CHECK', '1');
    vi.resetModules();
    checkMock.mockResolvedValue(fakeUpdate() as never);
    const { checkForAppUpdate, resetAppUpdateCheckForTests } = await import(
      '../src/services/appUpdate'
    );

    await expect(checkForAppUpdate()).resolves.toEqual({
      version: '99.0.0',
      currentVersion: '0.1.47',
      releaseNotes: '修复与改进',
    });
    await checkForAppUpdate();
    expect(checkMock).toHaveBeenCalledTimes(1);
    resetAppUpdateCheckForTests();
  });

  it('清单缺失或网络失败时静默按无更新收口', async () => {
    vi.stubEnv('VITE_AGC_ENABLE_APP_UPDATE_CHECK', '1');
    vi.resetModules();
    checkMock.mockRejectedValue(new Error('updater: manifest 404'));
    const { checkForAppUpdate, resetAppUpdateCheckForTests } = await import(
      '../src/services/appUpdate'
    );

    await expect(checkForAppUpdate()).resolves.toBeNull();
    resetAppUpdateCheckForTests();
  });

  it('安装时按下载事件上报进度并在完成后重启进程', async () => {
    vi.stubEnv('VITE_AGC_ENABLE_APP_UPDATE_CHECK', '1');
    vi.resetModules();
    const invoke = stubTauriWindow();
    const update = fakeUpdate();
    checkMock.mockResolvedValue(update as never);
    const { checkForAppUpdate, installAppUpdate, resetAppUpdateCheckForTests } =
      await import('../src/services/appUpdate');

    await checkForAppUpdate();
    const progress: Array<{ downloadedBytes: number; totalBytes?: number }> =
      [];
    await installAppUpdate((value) => progress.push(value));

    expect(update.downloadAndInstall).toHaveBeenCalledTimes(1);
    expect(progress).toEqual([
      { downloadedBytes: 0, totalBytes: 100 },
      { downloadedBytes: 40, totalBytes: 100 },
      { downloadedBytes: 100, totalBytes: 100 },
      { downloadedBytes: 100, totalBytes: 100 },
    ]);
    expect(invoke).toHaveBeenCalledWith('restart_agc_app');
    resetAppUpdateCheckForTests();
  });

  it('没有待安装更新时安装请求失败关闭', async () => {
    vi.stubEnv('VITE_AGC_ENABLE_APP_UPDATE_CHECK', '1');
    vi.resetModules();
    const { installAppUpdate, resetAppUpdateCheckForTests } = await import(
      '../src/services/appUpdate'
    );

    await expect(installAppUpdate()).rejects.toThrow('没有可安装的更新');
    resetAppUpdateCheckForTests();
  });

  it('下载失败后仍可重试安装', async () => {
    vi.stubEnv('VITE_AGC_ENABLE_APP_UPDATE_CHECK', '1');
    vi.resetModules();
    const update = fakeUpdate();
    update.downloadAndInstall.mockRejectedValue(new Error('下载更新失败'));
    checkMock.mockResolvedValue(update as never);
    const { checkForAppUpdate, installAppUpdate, resetAppUpdateCheckForTests } =
      await import('../src/services/appUpdate');

    await checkForAppUpdate();
    await expect(installAppUpdate()).rejects.toThrow('下载更新失败');
    // 重试仍能拿到待装更新，而不是报“没有可安装的更新”。
    await expect(installAppUpdate()).rejects.toThrow('下载更新失败');
    expect(update.downloadAndInstall).toHaveBeenCalledTimes(2);
    resetAppUpdateCheckForTests();
  });
});