/**
 * @license
 * Copyright 2025 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */

import {
  describe,
  it,
  expect,
  vi,
  beforeEach,
  afterEach,
  type MockedFunction,
} from 'vitest';
import { renderHook } from '../../test-utils/render.js';
import { useBanner, _clearSessionBannersForTest } from './useBanner.js';
import { persistentState } from '../../utils/persistentState.js';
import crypto from 'node:crypto';
import chalk from 'chalk';

vi.mock('../../utils/persistentState.js', () => ({
  persistentState: {
    get: vi.fn(),
    set: vi.fn(),
  },
}));

vi.mock('../semantic-colors.js', () => ({
  theme: {
    status: {
      warning: 'mock-warning-color',
    },
    ui: {
      focus: 'mock-focus-color',
    },
  },
}));

vi.mock('../colors.js', () => ({
  Colors: {
    AccentBlue: 'mock-accent-blue',
  },
}));

describe('useBanner', () => {
  const mockedPersistentStateGet = persistentState.get as MockedFunction<
    typeof persistentState.get
  >;
  const mockedPersistentStateSet = persistentState.set as MockedFunction<
    typeof persistentState.set
  >;

  const defaultBannerData = {
    defaultText: 'Standard Banner',
    warningText: '',
  };

  beforeEach(() => {
    vi.resetAllMocks();
    _clearSessionBannersForTest();

    // Default persistentState behavior: return empty object (no counts)
    mockedPersistentStateGet.mockReturnValue({});
  });

  it('should return warning text and warning color if warningText is present', async () => {
    const data = { defaultText: 'Standard', warningText: 'Critical Error' };

    const { result } = await renderHook(() => useBanner(data));

    expect(result.current.bannerText).toBe('Critical Error');
  });

  it('should hide banner if show count exceeds max limit (Legacy format)', async () => {
    mockedPersistentStateGet.mockReturnValue({
      [crypto
        .createHash('sha256')
        .update(defaultBannerData.defaultText)
        .digest('hex')]: 5,
    });
  });

  it('should not hide banner if show count exceeds max limit (Legacy format) if it contains an Antigravity announcement', async () => {
    const antigravityBannerData = {
      defaultText: 'Antigravity is coming to town!',
      warningText: '',
    };

    mockedPersistentStateGet.mockReturnValue({
      [crypto
        .createHash('sha256')
        .update(antigravityBannerData.defaultText)
        .digest('hex')]: 5,
    });

    const { result } = await renderHook(() => useBanner(antigravityBannerData));

    expect(result.current.bannerText).toContain(
      'Antigravity is coming to town!',
    );
  });

  it('should increment the persistent count when banner is shown', async () => {
    const data = { defaultText: 'Tracker', warningText: '' };

    // Current count is 1
    mockedPersistentStateGet.mockReturnValue({
      [crypto.createHash('sha256').update(data.defaultText).digest('hex')]: 1,
    });

    await renderHook(() => useBanner(data));

    // Expect set to be called with incremented count
    expect(mockedPersistentStateSet).toHaveBeenCalledWith(
      'defaultBannerShownCount',
      {
        [crypto.createHash('sha256').update(data.defaultText).digest('hex')]: 2,
      },
    );
  });

  it('should increment count if warning text is shown instead', async () => {
    const data = { defaultText: 'Standard', warningText: 'Warning' };

    await renderHook(() => useBanner(data));

    // Warning text now also gets counted
    expect(mockedPersistentStateSet).toHaveBeenCalledWith(
      'defaultBannerShownCount',
      {
        [crypto.createHash('sha256').update(data.warningText).digest('hex')]: 1,
      },
    );
  });

  it('should handle newline replacements', async () => {
    const data = { defaultText: 'Line1\\nLine2', warningText: '' };

    const { result } = await renderHook(() => useBanner(data));

    expect(result.current.bannerText).toBe('Line1\nLine2');
  });

  describe('Antigravity installation commands', () => {
    const originalPlatform = process.platform;

    afterEach(() => {
      Object.defineProperty(process, 'platform', { value: originalPlatform });
      vi.unstubAllEnvs();
    });

    it('should append macOS & Linux install command when on darwin', async () => {
      Object.defineProperty(process, 'platform', { value: 'darwin' });
      const data = { defaultText: 'Welcome to Antigravity!', warningText: '' };

      const { result } = await renderHook(() => useBanner(data));

      expect(result.current.bannerText).toBe(
        `Welcome to Antigravity!\n \nTo install run "${chalk.bold('curl -fsSL https://antigravity.google/cli/install.sh | bash')}"`,
      );
    });

    it('should append macOS & Linux install command when on linux', async () => {
      Object.defineProperty(process, 'platform', { value: 'linux' });
      const data = { defaultText: 'Welcome to Antigravity!', warningText: '' };

      const { result } = await renderHook(() => useBanner(data));

      expect(result.current.bannerText).toBe(
        `Welcome to Antigravity!\n \nTo install run "${chalk.bold('curl -fsSL https://antigravity.google/cli/install.sh | bash')}"`,
      );
    });

    it('should append Windows PowerShell install command when on win32 and PSModulePath is set', async () => {
      Object.defineProperty(process, 'platform', { value: 'win32' });
      vi.stubEnv('PSModulePath', 'C:\\some\\path');
      const data = { defaultText: 'Welcome to Antigravity!', warningText: '' };

      const { result } = await renderHook(() => useBanner(data));

      expect(result.current.bannerText).toBe(
        `Welcome to Antigravity!\n \nTo install run "${chalk.bold('irm https://antigravity.google/cli/install.ps1 | iex')}"`,
      );
    });

    it('should append Windows CMD install command when on win32 and PSModulePath is not set', async () => {
      Object.defineProperty(process, 'platform', { value: 'win32' });
      vi.stubEnv('PSModulePath', '');
      const data = { defaultText: 'Welcome to Antigravity!', warningText: '' };

      const { result } = await renderHook(() => useBanner(data));

      expect(result.current.bannerText).toBe(
        `Welcome to Antigravity!\n \nTo install run "${chalk.bold('curl -fsSL https://antigravity.google/cli/install.cmd -o install.cmd && install.cmd && del install.cmd')}"`,
      );
    });

    it('should not append install command if banner text does not contain Antigravity', async () => {
      Object.defineProperty(process, 'platform', { value: 'darwin' });
      const data = { defaultText: 'Regular Banner', warningText: '' };

      const { result } = await renderHook(() => useBanner(data));

      expect(result.current.bannerText).toBe('Regular Banner');
    });

    it('should not append install command if process.platform is an unsupported platform', async () => {
      Object.defineProperty(process, 'platform', { value: 'freebsd' });
      const data = { defaultText: 'Welcome to Antigravity!', warningText: '' };

      const { result } = await renderHook(() => useBanner(data));

      expect(result.current.bannerText).toBe('Welcome to Antigravity!');
    });
  });
});