// @vitest-environment jsdom
import { afterEach, describe, expect, test, vi } from 'vitest';

import type { GameCreationAppManifest } from '../../../packages/shared/src/contracts/gameCreationApp';
import { GameRunVersionPicker } from '../src/features/resource-canvas/GameRunVersionPicker';
import {
  cleanup,
  createGameCreationAppManifest,
  createGameCreationAppSeedTasks,
  fireEvent,
  ProjectDevelopmentView,
  React,
  render,
  screen,
  waitFor,
  within,
} from './appSurface/harness';

const PROJECT_PATH = '/tmp/workbench-version-switch';

function installResourceCardIntersectionObserver() {
  class ResourceCardIntersectionObserver {
    readonly root = null;
    readonly rootMargin = '160px';
    readonly thresholds = [0];
    readonly observed = new Set<Element>();

    constructor(readonly callback: IntersectionObserverCallback) {}

    observe(element: Element) {
      this.observed.add(element);
    }

    unobserve(element: Element) {
      this.observed.delete(element);
    }

    disconnect() {
      this.observed.clear();
    }

    takeRecords() {
      return [];
    }
  }

  Object.defineProperty(window, 'IntersectionObserver', {
    configurable: true,
    value: ResourceCardIntersectionObserver,
  });
}

function createVersionedManifest(): GameCreationAppManifest {
  const manifest = createGameCreationAppManifest(
    'workbench-version-switch',
    '版本切换测试',
  );
  // 运行模块的可用性与版本入口无关，这里用一条已完成原型任务把它打开。
  manifest.tasks = createGameCreationAppSeedTasks().map((task) =>
    task.id === 'code-prototype'
      ? { ...task, status: 'completed' as const }
      : task,
  );
  // 两件资产必须落在同一栏目才能同屏比较版本高亮，因此都用 `character` 分类。
  manifest.assets = [
    {
      id: 'asset-player',
      kind: 'character',
      mediaType: 'image/png',
      localPath: 'assets/player.png',
      source: { kind: 'generated' },
    },
    {
      id: 'asset-town',
      kind: 'character',
      mediaType: 'image/png',
      localPath: 'assets/town.png',
      source: { kind: 'generated' },
    },
  ];
  // createdAt 是 Unix 秒（写入侧 manifest.rs 用 unix_timestamp()）。
  manifest.versions = [
    {
      versionId: 'version-root',
      parentVersionId: null,
      projectRevision: 3,
      resourceBindings: [
        { slotId: 'asset:asset-player', resourceId: 'asset-player' },
      ],
      createdReason: 'initial',
      createdAt: 1_788_075_047,
    },
    {
      versionId: 'version-child',
      parentVersionId: 'version-root',
      projectRevision: 4,
      resourceBindings: [
        { slotId: 'asset:asset-town', resourceId: 'asset-town' },
      ],
      createdReason: 'agent-revision',
      createdAt: 1_788_075_104,
    },
  ];
  return manifest;
}

function renderWorkbench(
  manifest: GameCreationAppManifest,
  props: {
    activeVersionId?: string | null;
    onActiveVersionChange?: (versionId: string) => void;
  } = {},
) {
  const { rerender } = render(
    React.createElement(ProjectDevelopmentView, {
      projectName: manifest.name,
      projectPath: PROJECT_PATH,
      manifest,
      attachments: [],
      recentRunStatus: null,
      recentRunStopReason: null,
      supervisor: React.createElement('div', null, '项目总控'),
      onHomeOpen: vi.fn(),
      onProjectsOpen: vi.fn(),
      onPlay: vi.fn(),
      ...props,
    }),
  );
  return {
    rerenderWith(next: Partial<Record<string, unknown>>) {
      rerender(
        React.createElement(ProjectDevelopmentView, {
          projectName: manifest.name,
          projectPath: PROJECT_PATH,
          manifest,
          attachments: [],
          recentRunStatus: null,
          recentRunStopReason: null,
          supervisor: React.createElement('div', null, '项目总控'),
          onHomeOpen: vi.fn(),
          onProjectsOpen: vi.fn(),
          onPlay: vi.fn(),
          ...props,
          ...next,
        }),
      );
    },
  };
}

async function openArtCategory() {
  fireEvent.click(screen.getByRole('button', { name: '按类型' }));
  // 左侧栏目大纲导航已按用户要求删除：切栏目走「资源总览」的栏目缩略卡片。
  if (document.querySelector('[data-resource-book-view="child"]')) {
    fireEvent.click(await screen.findByRole('button', { name: '收起资源' }));
    await waitFor(() =>
      expect(
        document.querySelector('[data-resource-book-view="main"]'),
      ).not.toBeNull(),
    );
  }
  fireEvent.click(
    await screen.findByRole('button', { name: '打开角色与对象' }),
  );
  await waitFor(() => {
    expect(
      document.querySelector('[data-resource-book-view="child"]'),
    ).not.toBeNull();
  });
}

function cardFor(label: string) {
  return screen
    .getByRole('button', { name: `选中资源：角色与对象 ${label}` })
    .closest('.game-resource-card');
}

afterEach(() => {
  cleanup();
});

describe('C7 运行模块版本切换', () => {
  test('keeps the version entry hidden without versions and shows the latest one by default', async () => {
    installResourceCardIntersectionObserver();
    const manifest = createVersionedManifest();
    manifest.versions = [];
    const withoutVersions = renderWorkbench(manifest);
    fireEvent.click(screen.getByRole('tab', { name: '运行' }));
    expect(screen.queryByLabelText(/^当前版本：/)).toBeNull();

    withoutVersions.rerenderWith({ manifest: createVersionedManifest() });
    const trigger = await screen.findByLabelText(/^当前版本：/);
    expect(trigger.getAttribute('aria-label')).toContain('智能体修订');
  });

  test('switches the current version through the entry and reports it to the host', async () => {
    installResourceCardIntersectionObserver();
    const manifest = createVersionedManifest();
    const onActiveVersionChange = vi.fn();
    renderWorkbench(manifest, { onActiveVersionChange });

    fireEvent.click(screen.getByRole('tab', { name: '运行' }));
    fireEvent.click(await screen.findByLabelText(/^当前版本：/));

    const menu = await screen.findByRole('listbox', {
      name: '切换游戏版本',
    });
    expect(within(menu).getAllByRole('option')).toHaveLength(2);
    // 当前版本（最新的那个）已在菜单里标记为选中。
    expect(
      within(menu)
        .getByRole('option', { name: /智能体修订/ })
        .getAttribute('aria-selected'),
    ).toBe('true');

    fireEvent.click(within(menu).getByRole('option', { name: /初始版本/ }));
    expect(onActiveVersionChange).toHaveBeenCalledWith('version-root');
  });

  test('reloads the current preview when the version changes in the run module', async () => {
    installResourceCardIntersectionObserver();
    const manifest = createVersionedManifest();
    const onPlay = vi.fn();
    const onActiveVersionChange = vi.fn();
    renderWorkbench(manifest, { onPlay, onActiveVersionChange });

    fireEvent.click(screen.getByRole('tab', { name: '运行' }));
    fireEvent.click(await screen.findByLabelText(/^当前版本：/));
    const menu = await screen.findByRole('listbox', {
      name: '切换游戏版本',
    });
    fireEvent.click(within(menu).getByRole('option', { name: /初始版本/ }));

    expect(onActiveVersionChange).toHaveBeenCalledWith('version-root');
    // 验收用例 S16 的「并重载当前预览」：只改记录层而不重载，用户看到的仍是上一个版本的
    // 画面（素材不可变，画面靠重载预览回到该版本对应的资源），切换就成了"点了没反应"。
    expect(onPlay).toHaveBeenCalled();
  });

  test('drives the "current use" card highlight from the active version', async () => {
    installResourceCardIntersectionObserver();
    const manifest = createVersionedManifest();
    const rendered = renderWorkbench(manifest);
    await openArtCategory();

    // 默认当前版本是 manifest 里最新的那个：只有它绑定的资源算「当前使用」。
    expect(cardFor('town.png')?.classList.contains('is-current-version')).toBe(
      true,
    );
    expect(
      cardFor('player.png')?.classList.contains('is-current-version'),
    ).toBe(false);
    // 同一件事的 DOM 合同：命中的卡片带 `data-used-by-current-version="true"`，
    // 未命中的卡片**根本没有这个属性**（不是 `"false"`），排障与验收都读它。
    expect(
      cardFor('town.png')?.getAttribute('data-used-by-current-version'),
    ).toBe('true');
    expect(
      cardFor('player.png')?.hasAttribute('data-used-by-current-version'),
    ).toBe(false);

    rendered.rerenderWith({ activeVersionId: 'version-root' });
    await waitFor(() => {
      expect(
        cardFor('player.png')?.classList.contains('is-current-version'),
      ).toBe(true);
    });
    expect(cardFor('town.png')?.classList.contains('is-current-version')).toBe(
      false,
    );
    // 切版本后属性跟着换手，而不是两件资产都亮着。
    expect(
      cardFor('player.png')?.getAttribute('data-used-by-current-version'),
    ).toBe('true');
    expect(
      cardFor('town.png')?.hasAttribute('data-used-by-current-version'),
    ).toBe(false);

    // 选中的版本已经不存在时按空态处理（与 `@` 面板同一口径），不残留旧高亮；
    // 工作台壳会在版本消失时把选择清回「最新版本」。
    rendered.rerenderWith({ activeVersionId: 'version-removed' });
    await waitFor(() => {
      expect(
        cardFor('town.png')?.classList.contains('is-current-version'),
      ).toBe(false);
    });
    expect(
      cardFor('player.png')?.classList.contains('is-current-version'),
    ).toBe(false);
    expect(
      cardFor('town.png')?.hasAttribute('data-used-by-current-version'),
    ).toBe(false);
    expect(
      cardFor('player.png')?.hasAttribute('data-used-by-current-version'),
    ).toBe(false);
  });

  /**
   * 菜单位置按触发按钮的实时 rect 算：运行画面会缩放 / 滚动，`fixed` 定位的菜单
   * 不跟着重算就会漂在旧位置上（离触发按钮越来越远，甚至跑出视口）。
   *
   * 变异验证：把 `scroll` / `resize` 的重算订阅删掉，本用例必须失败。
   */
  test('recomputes the portal menu position after the window scrolls', async () => {
    const rect = (bottom: number) =>
      ({
        bottom,
        right: 200,
        top: bottom - 24,
        left: 120,
        width: 80,
        height: 24,
        x: 120,
        y: bottom - 24,
        toJSON: () => ({}),
      }) as DOMRect;
    const rectSpy = vi
      .spyOn(HTMLElement.prototype, 'getBoundingClientRect')
      .mockReturnValue(rect(100));

    try {
      render(
        React.createElement(GameRunVersionPicker, {
          versions: createVersionedManifest().versions,
          activeVersionId: null,
          onSelectVersion: vi.fn(),
        }),
      );

      fireEvent.click(await screen.findByLabelText(/^当前版本：/));
      const menu = await screen.findByRole('listbox', {
        name: '切换游戏版本',
      });
      expect(menu.style.top).toBe('106px');

      // 窗口滚动 / 画布缩放后触发按钮位移，菜单必须跟着走。
      rectSpy.mockReturnValue(rect(240));
      fireEvent.scroll(window);
      await waitFor(() => {
        expect(menu.style.top).toBe('246px');
      });
    } finally {
      rectSpy.mockRestore();
    }
  });

  /**
   * 用户实测「切换版本点了选项没反应」的直接原因（与事件订阅报错互相独立）。
   *
   * 菜单 portal 到 `document.body`，DOM 上不在触发按钮的子树里。只认 `rootRef` 的
   * 「点外部」判定会把落在选项上的 mousedown 当成点外部、当场卸载菜单，随后的 click
   * 就落不到选项上，`onSelectVersion` 永远不会被调用。
   *
   * 这两条用例必须走**真实指针序列**（mousedown → mouseup → click）：只派发 click
   * 会绕过「点外部」判定，正是旧用例没抓住这个 bug 的原因。
   */
  test('does not dismiss the portal version menu when an option is pressed down', async () => {
    const onSelectVersion = vi.fn();
    render(
      React.createElement(GameRunVersionPicker, {
        versions: createVersionedManifest().versions,
        activeVersionId: null,
        onSelectVersion,
      }),
    );

    fireEvent.click(await screen.findByLabelText(/^当前版本：/));
    const menu = await screen.findByRole('listbox', {
      name: '切换游戏版本',
    });
    const option = within(menu).getByRole('option', { name: /初始版本/ });

    fireEvent.mouseDown(option);
    // 按下选项时菜单必须还在：被卸载掉就说明这次 mousedown 被判成了「点外部」。
    expect(
      screen.queryByRole('listbox', { name: '切换游戏版本' }),
    ).not.toBeNull();

    fireEvent.mouseUp(option);
    fireEvent.click(option);
    expect(onSelectVersion).toHaveBeenCalledWith('version-root');
  });

  /**
   * portal 菜单本身必须登记成「点这里不算外部」：菜单挂在 `document.body` 上，
   * 不在触发按钮的子树里，只按 `rootRef` 判定就会把落在菜单自己身上的点击
   * 当成点外部把它收掉（选项与菜单之间的空隙、菜单容器的内边距都算）。
   */
  test('keeps the portal menu mounted when the click lands on the menu itself', async () => {
    render(
      React.createElement(GameRunVersionPicker, {
        versions: createVersionedManifest().versions,
        activeVersionId: null,
        onSelectVersion: vi.fn(),
      }),
    );

    fireEvent.click(await screen.findByLabelText(/^当前版本：/));
    const menu = await screen.findByRole('listbox', {
      name: '切换游戏版本',
    });

    fireEvent.mouseDown(menu);
    fireEvent.click(menu);

    expect(
      screen.queryByRole('listbox', { name: '切换游戏版本' }),
    ).not.toBeNull();
  });

  test('selects the version from the run module when the option is clicked after a real press', async () => {
    installResourceCardIntersectionObserver();
    const manifest = createVersionedManifest();
    const onActiveVersionChange = vi.fn();
    renderWorkbench(manifest, { onActiveVersionChange });

    fireEvent.click(screen.getByRole('tab', { name: '运行' }));
    fireEvent.click(await screen.findByLabelText(/^当前版本：/));
    const menu = await screen.findByRole('listbox', {
      name: '切换游戏版本',
    });
    const option = within(menu).getByRole('option', { name: /初始版本/ });

    // 真实的一次「点选项」：按下 → 抬起 → click。菜单若在按下那一刻被卸载，
    // 这次 click 就落不到选项上，宿主收不到任何版本变更（即「点了没反应」）。
    fireEvent.mouseDown(option);
    fireEvent.mouseUp(option);
    fireEvent.click(option);

    expect(onActiveVersionChange).toHaveBeenCalledWith('version-root');
  });
});