import * as Haptics from 'expo-haptics';
import * as Linking from 'expo-linking';
import * as Sharing from 'expo-sharing';
import { Share } from 'react-native';
import { afterEach, describe, expect, test, vi } from 'vitest';

import {
  HOST_BRIDGE_PROTOCOL,
  HOST_BRIDGE_VERSION,
  type HostBridgeMethod,
  type HostBridgeRequest,
  type HostBridgeResponse,
} from '../../../packages/shared/src/contracts/hostBridge';
import {
  configureMobileHostBridgeNavigation,
  handleMobileHostBridgeMessage,
  resetMobileHostBridgeForTest,
} from './mobileHostBridge';

vi.mock('expo-clipboard', () => ({
  setStringAsync: vi.fn(),
}));

const writtenFiles = vi.hoisted(
  () => [] as { uri: string; content: string }[],
);

vi.mock('expo-file-system', () => ({
  Paths: {
    cache: 'file:///cache/',
  },
  File: class MockFile {
    uri: string;

    constructor(_base: string, fileName: string) {
      this.uri = `file:///cache/${fileName}`;
    }

    write(content: string) {
      writtenFiles.push({
        uri: this.uri,
        content,
      });
    }
  },
}));

vi.mock('expo-haptics', () => ({
  ImpactFeedbackStyle: {
    Heavy: 'heavy',
    Light: 'light',
    Medium: 'medium',
  },
  impactAsync: vi.fn(),
}));

vi.mock('expo-linking', () => ({
  openURL: vi.fn(),
}));

vi.mock('expo-sharing', () => ({
  isAvailableAsync: vi.fn(async () => true),
  shareAsync: vi.fn(),
}));

vi.mock('react-native', () => ({
  Platform: {
    OS: 'ios',
  },
  Share: {
    share: vi.fn(),
  },
}));

function request(
  method: HostBridgeMethod,
  payload?: unknown,
): HostBridgeRequest {
  return {
    bridge: HOST_BRIDGE_PROTOCOL,
    version: HOST_BRIDGE_VERSION,
    id: 'request-1',
    method,
    payload,
  };
}

async function send(requestValue: HostBridgeRequest) {
  const responses: HostBridgeResponse[] = [];

  await handleMobileHostBridgeMessage(JSON.stringify(requestValue), (response) =>
    responses.push(response),
  );

  const response = responses[0];
  if (!response) {
    throw new Error('host bridge response missing');
  }

  return response;
}

function expectOk(response: HostBridgeResponse) {
  if (!response.ok) {
    throw new Error('expected ok host bridge response');
  }

  return response;
}

function expectFailed(response: HostBridgeResponse) {
  if (response.ok) {
    throw new Error('expected failed host bridge response');
  }

  return response;
}

afterEach(() => {
  vi.mocked(Haptics.impactAsync).mockReset();
  vi.mocked(Linking.openURL).mockReset();
  vi.mocked(Sharing.isAvailableAsync).mockReset();
  vi.mocked(Sharing.isAvailableAsync).mockResolvedValue(true);
  vi.mocked(Sharing.shareAsync).mockReset();
  vi.mocked(Share.share).mockReset();
  writtenFiles.length = 0;
  resetMobileHostBridgeForTest();
});

describe('handleMobileHostBridgeMessage', () => {
  test('runtime 能力清单声明移动壳支持受控 WebView 导航', async () => {
    const response = await send(request('host.getRuntime'));

    const okResponse = expectOk(response);

    expect(okResponse.result).toMatchObject({
      shell: 'expo_mobile',
      platform: 'ios',
    });
    expect(
      (okResponse.result as { capabilities: string[] }).capabilities,
    ).toContain('navigation.openNativePage');
    expect(
      (okResponse.result as { capabilities: string[] }).capabilities,
    ).toContain('file.exportText');
    expect(
      (okResponse.result as { capabilities: string[] }).capabilities,
    ).toEqual(
      expect.arrayContaining(['host.events', 'navigation.canGoBack']),
    );
  });

  test('navigation.openNativePage 把同源路径切到移动壳 WebView', async () => {
    const openWebViewUrl = vi.fn();
    configureMobileHostBridgeNavigation({
      allowedOrigin: 'https://app.genarrative.world',
      openWebViewUrl,
    });

    const response = await send(
      request('navigation.openNativePage', {
        url: '/works/detail?work=PZ-1',
      }),
    );

    expectOk(response);
    expect(openWebViewUrl).toHaveBeenCalledWith(
      'https://app.genarrative.world/works/detail?work=PZ-1',
    );
  });

  test('navigation.openNativePage 拒绝外域目标', async () => {
    configureMobileHostBridgeNavigation({
      allowedOrigin: 'https://app.genarrative.world',
      openWebViewUrl: vi.fn(),
    });

    const response = await send(
      request('navigation.openNativePage', {
        url: 'https://example.com/works/detail?work=PZ-1',
      }),
    );

    const failedResponse = expectFailed(response);

    expect(failedResponse.error.code).toBe('invalid_request');
  });

  test('未配置 WebView 导航器时明确返回 unsupported', async () => {
    const response = await send(
      request('navigation.openNativePage', {
        url: '/works/detail?work=PZ-1',
      }),
    );

    const failedResponse = expectFailed(response);

    expect(failedResponse.error.code).toBe('unsupported_method');
  });

  test('app.openExternalUrl 只打开允许的外链协议', async () => {
    const response = await send(
      request('app.openExternalUrl', {
        url: ' https://example.com/path ',
      }),
    );

    expectOk(response);
    expect(Linking.openURL).toHaveBeenCalledWith('https://example.com/path');
  });

  test('app.openExternalUrl 拒绝危险协议', async () => {
    const response = await send(
      request('app.openExternalUrl', {
        url: 'javascript:alert(1)',
      }),
    );

    const failedResponse = expectFailed(response);

    expect(failedResponse.error.code).toBe('invalid_request');
    expect(Linking.openURL).not.toHaveBeenCalled();
  });

  test('haptics.impact 调起 Expo 触觉反馈', async () => {
    const response = await send(
      request('haptics.impact', {
        style: 'heavy',
      }),
    );

    expectOk(response);
    expect(Haptics.impactAsync).toHaveBeenCalledWith(
      Haptics.ImpactFeedbackStyle.Heavy,
    );
  });

  test('share.open 使用直接分享 payload 调起系统分享', async () => {
    const response = await send(
      request('share.open', {
        title: '测试作品',
        message: '来玩这个作品',
        url: 'https://app.genarrative.world/works/detail?work=PZ-1',
      }),
    );

    expectOk(response);
    expect(Share.share).toHaveBeenCalledWith({
      title: '测试作品',
      message:
        '来玩这个作品\nhttps://app.genarrative.world/works/detail?work=PZ-1',
      url: 'https://app.genarrative.world/works/detail?work=PZ-1',
    });
  });

  test('share.open 使用缓存作品目标生成作品详情链接', async () => {
    expectOk(
      await send(
        request('share.setTarget', {
          target: {
            type: 'genarrative:share-target',
            payload: {
              title: '暖灯猫街',
              message: '来玩这个作品',
              work: 'PZ-00000001',
            },
          },
        }),
      ),
    );

    const response = await send(request('share.open'));

    expectOk(response);
    expect(Share.share).toHaveBeenCalledWith({
      title: '暖灯猫街',
      message:
        '来玩这个作品\nhttps://app.genarrative.world/works/detail?work=PZ-00000001',
      url: 'https://app.genarrative.world/works/detail?work=PZ-00000001',
    });
  });

  test('share.open 没有可分享内容时拒绝请求', async () => {
    const response = await send(request('share.open', {}));

    const failedResponse = expectFailed(response);

    expect(failedResponse.error.code).toBe('invalid_request');
    expect(Share.share).not.toHaveBeenCalled();
  });

  test('file.exportText 写入缓存文件并调起系统分享', async () => {
    const response = await send(
      request('file.exportText', {
        fileName: ' ../作品:记录?.txt ',
        content: '暖灯猫街',
        mimeType: 'text/markdown',
      }),
    );

    const okResponse = expectOk(response);

    expect(okResponse.result).toEqual({
      action: 'saved',
      fileName: '作品-记录-.txt',
      bytes: 12,
    });
    expect(writtenFiles).toEqual([
      {
        uri: 'file:///cache/作品-记录-.txt',
        content: '暖灯猫街',
      },
    ]);
    expect(Sharing.shareAsync).toHaveBeenCalledWith(
      'file:///cache/作品-记录-.txt',
      {
        mimeType: 'text/markdown',
        UTI: 'public.plain-text',
        dialogTitle: '作品-记录-.txt',
      },
    );
  });

  test('file.exportText 在系统分享不可用时明确返回 unsupported capability', async () => {
    vi.mocked(Sharing.isAvailableAsync).mockResolvedValue(false);

    const response = await send(
      request('file.exportText', {
        fileName: '作品记录.txt',
        content: 'content',
      }),
    );

    const failedResponse = expectFailed(response);

    expect(failedResponse.error.code).toBe('unsupported_capability');
    expect(writtenFiles).toEqual([]);
    expect(Sharing.shareAsync).not.toHaveBeenCalled();
  });

  test('file.exportText 拒绝超出上限的文本内容', async () => {
    const response = await send(
      request('file.exportText', {
        fileName: '作品记录.txt',
        content: 'a'.repeat(5 * 1024 * 1024 + 1),
      }),
    );

    const failedResponse = expectFailed(response);

    expect(failedResponse.error.code).toBe('invalid_request');
    expect(writtenFiles).toEqual([]);
    expect(Sharing.shareAsync).not.toHaveBeenCalled();
  });
});