// @vitest-environment jsdom
import { act, cleanup, renderHook, waitFor } from '@testing-library/react';
import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';

import { createGameCreationAppManifest } from '../../../packages/shared/src/contracts/gameCreationApp';
import { useHomeProjectCreation } from '../src/features/app-shell/useHomeProjectCreation';
import type {
  GameTemplateEntry,
  GameTemplateLibrarySnapshot,
} from '../src/features/template-library/templateLibraryModel';
import { useTemplateLibrary } from '../src/features/template-library/useTemplateLibrary';
import {
  beginPlatformSessionClearTransition,
  resetPlatformSessionStateForTests,
} from '../src/services/platformSession';

const invoke = vi.hoisted(() => vi.fn());
vi.mock('../src/app/tauri', () => ({ resolveTauriInvoke: () => invoke }));

const template: GameTemplateEntry = {
  id: 'demo',
  title: '演示',
  summary: '',
  tags: [],
  runtime: 'html',
  engine: 'phaser',
  engineVersion: '4',
  templateVersion: '1',
  updatedAt: '',
  entry: 'index.html',
  zipUrl: 'https://example.invalid/demo.zip',
  zipSizeBytes: 1,
  zipSha256: 'a'.repeat(64),
  coverUrl: '',
  coverWidth: 100,
  coverHeight: 100,
  installed: true,
  installedVersion: '1',
  installedAtMillis: 1,
};
const snapshot = (id = 'demo'): GameTemplateLibrarySnapshot => ({
  schemaVersion: 'agc-template-library.v1',
  library: 'official',
  libraryVersion: 1,
  updatedAt: '',
  fetchedAtMillis: 1,
  source: 'cache',
  templates: [{ ...template, id }],
});
function deferred<T>() {
  let resolve!: (value: T) => void;
  const promise = new Promise<T>((done) => {
    resolve = done;
  });
  return { promise, resolve };
}
const onProjectCreated = vi.fn();
const mount = () =>
  renderHook(({ userId }) => useTemplateLibrary({ userId, onProjectCreated }), {
    initialProps: { userId: 'user-a' },
  });

beforeEach(() => {
  resetPlatformSessionStateForTests();
  invoke.mockReset();
  onProjectCreated.mockReset();
});
afterEach(cleanup);

describe('模板库灰度会话', () => {
  it('等待权威权限时不读取清单，拒绝后也不能调用下载', async () => {
    const access = deferred<boolean>();
    invoke.mockImplementation(() => access.promise);
    const { result } = mount();
    expect(result.current.enabled).toBe(false);
    expect(invoke.mock.calls.map(([command]) => command)).toEqual([
      'get_game_template_library_access',
    ]);
    await act(async () => {
      access.resolve(false);
    });
    await expect(result.current.downloadTemplate(template)).rejects.toThrow(
      '暂未',
    );
    expect(result.current.snapshot).toBeNull();
    expect(invoke).toHaveBeenCalledTimes(1);
  });

  it('命中后读取清单，窗口重新聚焦失去权限就清空缓存投影', async () => {
    let allowed = true;
    invoke.mockImplementation(async (command) =>
      command === 'get_game_template_library_access' ? allowed : snapshot(),
    );
    const { result } = mount();
    await waitFor(() => expect(result.current.status).toBe('ready'));
    expect(result.current.enabled).toBe(true);
    expect(result.current.templates).toHaveLength(1);
    allowed = false;
    await act(async () => {
      window.dispatchEvent(new Event('focus'));
    });
    expect(result.current.enabled).toBe(false);
    expect(result.current.templates).toEqual([]);
    expect(result.current.snapshot).toBeNull();
    expect(
      invoke.mock.calls.filter(
        ([command]) => command === 'fetch_game_template_library',
      ),
    ).toHaveLength(1);
  });

  it('账号切换后丢弃前一账号迟到的允许结果', async () => {
    const access = deferred<boolean>();
    invoke
      .mockImplementationOnce(() => access.promise)
      .mockResolvedValue(false);
    const { result, rerender } = mount();
    rerender({ userId: 'user-b' });
    await act(async () => {
      access.resolve(true);
    });
    expect(result.current.enabled).toBe(false);
    expect(
      invoke.mock.calls.filter(
        ([command]) => command === 'fetch_game_template_library',
      ),
    ).toHaveLength(0);
  });

  it('账号切换后旧清单不能覆盖当前账号的清单', async () => {
    const oldManifest = deferred<GameTemplateLibrarySnapshot>();
    let fetches = 0;
    invoke.mockImplementation(async (command) => {
      if (command === 'get_game_template_library_access') return true;
      return ++fetches === 1
        ? oldManifest.promise
        : snapshot('user-b-template');
    });
    const { result, rerender } = mount();
    await waitFor(() => expect(fetches).toBe(1));
    rerender({ userId: 'user-b' });
    await waitFor(() =>
      expect(result.current.templates[0]?.id).toBe('user-b-template'),
    );
    await act(async () => {
      oldManifest.resolve(snapshot('user-a-template'));
    });
    expect(result.current.templates[0]?.id).toBe('user-b-template');
  });

  it.each(['download', 'create'] as const)(
    '账号切换后迟到的%s结果不能写状态或跳转',
    async (operation) => {
      const completion = deferred<unknown>();
      let allowed = true;
      invoke.mockImplementation(async (command) => {
        if (command === 'get_game_template_library_access') return allowed;
        if (command === 'fetch_game_template_library') return snapshot();
        return completion.promise;
      });
      const { result, rerender } = mount();
      await waitFor(() => expect(result.current.status).toBe('ready'));
      let pending!: Promise<unknown>;
      act(() => {
        pending = (
          operation === 'create'
            ? result.current.createProjectFromTemplate(template)
            : result.current.downloadTemplate(template)
        ).catch((error) => error);
      });
      allowed = false;
      rerender({ userId: 'user-b' });
      await act(async () => {
        completion.resolve({ projectPath: '/old', templateVersion: '1' });
        await pending;
      });
      expect(await pending).toBeInstanceOf(Error);
      expect(onProjectCreated).not.toHaveBeenCalled();
      expect(result.current.enabled).toBe(false);
      expect(result.current.notice).toBe('');
      expect(result.current.busyTemplateId).toBeNull();
    },
  );

  it('原生命令拒绝权限后立即关闭入口，已安装模板不能绕过', async () => {
    invoke.mockImplementation(async (command) => {
      if (command === 'get_game_template_library_access') return true;
      if (command === 'fetch_game_template_library') return snapshot();
      throw new Error('template-library-unavailable: 模板库暂未开放');
    });
    const { result } = mount();
    await waitFor(() => expect(result.current.status).toBe('ready'));
    await act(async () => {
      await expect(
        result.current.createProjectFromTemplate(template),
      ).rejects.toThrow('暂未开放');
    });
    expect(result.current.enabled).toBe(false);
    expect(result.current.snapshot).toBeNull();
    expect(onProjectCreated).not.toHaveBeenCalled();
  });

  it('检查权限失败时关闭入口而不使用先前允许结果', async () => {
    invoke.mockImplementation(async (command) =>
      command === 'get_game_template_library_access' ? true : snapshot(),
    );
    const { result } = mount();
    await waitFor(() => expect(result.current.status).toBe('ready'));
    invoke.mockRejectedValueOnce(new Error('offline'));
    await act(async () => {
      await result.current.refresh();
    });
    expect(result.current.enabled).toBe(false);
    expect(result.current.templates).toEqual([]);
  });

  it('退出登录开始时即使 userId 未变也清空权限并停止旧建项回调', async () => {
    const completion = deferred<unknown>();
    invoke.mockImplementation(async (command) => {
      if (command === 'get_game_template_library_access') return true;
      if (command === 'fetch_game_template_library') return snapshot();
      return completion.promise;
    });
    const { result } = mount();
    await waitFor(() => expect(result.current.status).toBe('ready'));
    let pending!: Promise<unknown>;
    act(() => {
      pending = result.current
        .createProjectFromTemplate(template)
        .catch((error) => error);
    });
    act(() => {
      beginPlatformSessionClearTransition();
    });
    expect(result.current.enabled).toBe(false);
    const count = invoke.mock.calls.length;
    await act(async () => {
      await result.current.refresh();
    });
    expect(invoke).toHaveBeenCalledTimes(count);
    await act(async () => {
      completion.resolve({ projectPath: '/old' });
      await pending;
    });
    expect(onProjectCreated).not.toHaveBeenCalled();
  });

  it.each(['get_local_game_project_revision', 'get_local_game_preview_status'])(
    '退出登录时 %s 的旧结果不能进入项目或登记最近项目',
    async (delayedCommand) => {
      const delayed = deferred<unknown>();
      const manifest = createGameCreationAppManifest(
        'template-project',
        '模板项目',
      );
      invoke.mockImplementation(async (command) => {
        if (command === 'get_game_template_library_access') return true;
        if (command === 'fetch_game_template_library') return snapshot();
        if (command === 'create_automatic_local_game_project_from_template')
          return { projectPath: 'C:/test/template-project', manifest };
        if (command === delayedCommand) return delayed.promise;
        if (command === 'get_local_game_project_revision')
          return { revision: 1 };
        if (command === 'get_local_game_preview_status')
          return { status: 'stopped' };
        throw new Error(command);
      });
      const setLauncherView = vi.fn();
      const rememberRecentWorkspace = vi.fn();
      const { result } = renderHook(() => {
        const home = useHomeProjectCreation({
          setLauncherView,
          rememberRecentWorkspace,
          setStatus: vi.fn(),
          setAgentChatProjectPath: vi.fn(),
        });
        const library = useTemplateLibrary({
          userId: 'user-a',
          onProjectCreated: (created, isCurrent) =>
            home.enterCreatedTemplateProject(created, isCurrent),
        });
        return { home, library };
      });
      await waitFor(() => expect(result.current.library.status).toBe('ready'));
      let pending!: Promise<unknown>;
      act(() => {
        pending = result.current.library.createProjectFromTemplate(template);
      });
      await waitFor(() =>
        expect(
          invoke.mock.calls.some(([command]) => command === delayedCommand),
        ).toBe(true),
      );
      act(() => {
        beginPlatformSessionClearTransition();
      });
      await act(async () => {
        delayed.resolve({ revision: 1, status: 'stopped' });
        await pending;
      });
      expect(result.current.home.currentProjectContext).toBeNull();
      expect(setLauncherView).not.toHaveBeenCalled();
      expect(rememberRecentWorkspace).not.toHaveBeenCalled();
    },
  );
});