import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';

// Mock child_process.execSync to prevent actual shell commands
vi.mock('node:child_process', () => ({
  execSync: vi.fn(() => ''),
}));

// Mock fs to prevent actual file operations
vi.mock('node:fs', () => {
  const fs = vi.importActual<typeof import('node:fs')>('node:fs');
  return {
    ...fs,
    existsSync: vi.fn(() => false),
    copyFileSync: vi.fn(),
    mkdtempSync: vi.fn(() => '/tmp/test-dir'),
    readdirSync: vi.fn(() => []),
    readFileSync: vi.fn(() => Buffer.alloc(0)),
    rmSync: vi.fn(),
  };
});

const itIfDarwin = process.platform === 'darwin' ? it : it.skip;

function buildSafariCookieRecord(input: { domain: string; name: string; value: string; path?: string }): Buffer {
  const domain = Buffer.from(input.domain, 'utf8');
  const name = Buffer.from(input.name, 'utf8');
  const path = Buffer.from(input.path ?? '/', 'utf8');
  const value = Buffer.from(input.value, 'utf8');

  const headerSize = 56;
  const domainOffset = headerSize;
  const nameOffset = domainOffset + domain.length + 1;
  const pathOffset = nameOffset + name.length + 1;
  const valueOffset = pathOffset + path.length + 1;
  const recordSize = valueOffset + value.length + 1;

  const record = Buffer.alloc(recordSize);
  record.writeUInt32LE(recordSize, 0);
  record.writeUInt32LE(0, 4);
  record.writeUInt32LE(0, 8);
  record.writeUInt32LE(0, 12);
  record.writeUInt32LE(domainOffset, 16);
  record.writeUInt32LE(nameOffset, 20);
  record.writeUInt32LE(pathOffset, 24);
  record.writeUInt32LE(valueOffset, 28);

  domain.copy(record, domainOffset);
  record[domainOffset + domain.length] = 0;
  name.copy(record, nameOffset);
  record[nameOffset + name.length] = 0;
  path.copy(record, pathOffset);
  record[pathOffset + path.length] = 0;
  value.copy(record, valueOffset);
  record[valueOffset + value.length] = 0;

  return record;
}

function buildSafariCookiesFile(records: Buffer[]): Buffer {
  const cookieCount = records.length;
  const headerSize = 4 + 4 + 4 * cookieCount + 4;
  const offsets: number[] = [];
  let cursor = headerSize;
  for (const record of records) {
    offsets.push(cursor);
    cursor += record.length;
  }

  const pageSize = cursor;
  const page = Buffer.alloc(pageSize);
  page.writeUInt32BE(0x00000100, 0);
  page.writeUInt32LE(cookieCount, 4);
  offsets.forEach((offset, index) => {
    page.writeUInt32LE(offset, 8 + index * 4);
  });
  page.writeUInt32LE(0, 8 + cookieCount * 4);
  offsets.forEach((offset, index) => {
    records[index].copy(page, offset);
  });

  const header = Buffer.alloc(12);
  header.write('cook', 0, 'ascii');
  header.writeUInt32BE(1, 4);
  header.writeUInt32BE(pageSize, 8);

  return Buffer.concat([header, page]);
}

describe('cookies', () => {
  const originalEnv = process.env;

  beforeEach(() => {
    vi.resetModules();
    process.env = { ...originalEnv };
    // Clear Twitter-related env vars
    process.env.AUTH_TOKEN = undefined;
    process.env.TWITTER_AUTH_TOKEN = undefined;
    process.env.CT0 = undefined;
    process.env.TWITTER_CT0 = undefined;
  });

  afterEach(() => {
    process.env = originalEnv;
    vi.restoreAllMocks();
  });

  describe('resolveCredentials', () => {
    it('honors cookieSource=firefox even when Safari has cookies', async () => {
      const { resolveCredentials } = await import('../src/lib/cookies.js');
      const fs = await import('node:fs');
      const { execSync } = await import('node:child_process');

      // Safari cookie file exists + contains different cookies
      (fs.existsSync as unknown as vi.Mock).mockImplementation((path: string) => {
        const lower = path.toLowerCase();
        if (lower.endsWith('cookies.binarycookies')) return true;
        if (lower.endsWith('cookies.sqlite')) return true;
        if (lower.includes('firefox')) return true;
        return false;
      });
      (fs.readdirSync as unknown as vi.Mock).mockReturnValue([
        { isDirectory: () => true, name: 'abc.default-release' },
      ]);
      (fs.copyFileSync as unknown as vi.Mock).mockImplementation(() => {});
      (fs.readFileSync as unknown as vi.Mock).mockReturnValue(
        buildSafariCookiesFile([
          buildSafariCookieRecord({ domain: '.x.com', name: 'auth_token', value: 'safari_auth' }),
          buildSafariCookieRecord({ domain: '.x.com', name: 'ct0', value: 'safari_ct0' }),
        ]),
      );

      // Firefox sqlite3 extraction returns different cookies
      (execSync as unknown as vi.Mock).mockImplementation((cmd: string) => {
        if (cmd.includes('sqlite3')) return 'auth_token|firefox_auth\nct0|firefox_ct0';
        return '';
      });

      const result = await resolveCredentials({ cookieSource: 'firefox' });
      expect(result.cookies.authToken).toBe('firefox_auth');
      expect(result.cookies.ct0).toBe('firefox_ct0');
      expect(result.cookies.source).toContain('Firefox');
    });

    itIfDarwin('honors cookieSource=safari', async () => {
      const { resolveCredentials } = await import('../src/lib/cookies.js');
      const fs = await import('node:fs');

      (fs.existsSync as unknown as vi.Mock).mockImplementation((path: string) =>
        path.toLowerCase().endsWith('cookies.binarycookies'),
      );
      (fs.copyFileSync as unknown as vi.Mock).mockImplementation(() => {});
      (fs.mkdtempSync as unknown as vi.Mock).mockReturnValue('/tmp/test-dir');
      (fs.readFileSync as unknown as vi.Mock).mockReturnValue(
        buildSafariCookiesFile([
          buildSafariCookieRecord({ domain: '.x.com', name: 'auth_token', value: 'safari_auth' }),
          buildSafariCookieRecord({ domain: '.x.com', name: 'ct0', value: 'safari_ct0' }),
        ]),
      );

      const result = await resolveCredentials({ cookieSource: 'safari' });
      expect(result.cookies.authToken).toBe('safari_auth');
      expect(result.cookies.ct0).toBe('safari_ct0');
      expect(result.cookies.cookieHeader).toContain('auth_token=safari_auth');
      expect(result.cookies.cookieHeader).toContain('ct0=safari_ct0');
      expect(result.cookies.source).toBe('Safari');
    });

    it('uses firefox when enabled and returns cookies', async () => {
      const { resolveCredentials } = await import('../src/lib/cookies.js');
      const fs = await import('node:fs');

      // Firefox present with cookies.sqlite
      (fs.existsSync as unknown as vi.Mock).mockImplementation((path: string) => {
        const lower = path.toLowerCase();
        if (lower.endsWith('cookies.sqlite')) return true;
        if (lower.includes('firefox')) return true;
        return false;
      });
      (fs.readdirSync as unknown as vi.Mock).mockReturnValue([
        { isDirectory: () => true, name: 'abc.default-release' },
      ]);
      (fs.copyFileSync as unknown as vi.Mock).mockImplementation(() => {});
      (fs.mkdtempSync as unknown as vi.Mock).mockReturnValue('/tmp/test-dir');

      // sqlite3 output for firefox
      const { execSync } = await import('node:child_process');
      (execSync as unknown as vi.Mock).mockReturnValue('auth_token|firefox_auth\nct0|firefox_ct0');

      const result = await resolveCredentials({ cookieSource: 'firefox', firefoxProfile: 'abc.default-release' });

      expect(result.cookies.authToken).toBe('firefox_auth');
      expect(result.cookies.ct0).toBe('firefox_ct0');
      expect(result.cookies.cookieHeader).toContain('auth_token=firefox_auth');
      expect(result.cookies.cookieHeader).toContain('ct0=firefox_ct0');
      expect(result.cookies.source).toContain('Firefox');
    });

    it('should prioritize CLI arguments over env vars', async () => {
      process.env.AUTH_TOKEN = 'env_auth';
      process.env.CT0 = 'env_ct0';

      const { resolveCredentials } = await import('../src/lib/cookies.js');
      const result = await resolveCredentials({
        authToken: 'cli_auth',
        ct0: 'cli_ct0',
      });

      expect(result.cookies.authToken).toBe('cli_auth');
      expect(result.cookies.ct0).toBe('cli_ct0');
      expect(result.cookies.cookieHeader).toBe('auth_token=cli_auth; ct0=cli_ct0');
      expect(result.cookies.source).toBe('CLI argument');
    });

    it('should use AUTH_TOKEN env var', async () => {
      process.env.AUTH_TOKEN = 'test_auth_token';
      process.env.CT0 = 'test_ct0';

      const { resolveCredentials } = await import('../src/lib/cookies.js');
      const result = await resolveCredentials({ cookieSource: 'safari' });

      expect(result.cookies.authToken).toBe('test_auth_token');
      expect(result.cookies.ct0).toBe('test_ct0');
      expect(result.cookies.source).toBe('env AUTH_TOKEN');
    });

    it('should use TWITTER_AUTH_TOKEN env var as fallback', async () => {
      process.env.TWITTER_AUTH_TOKEN = 'twitter_auth';
      process.env.TWITTER_CT0 = 'twitter_ct0';

      const { resolveCredentials } = await import('../src/lib/cookies.js');
      const result = await resolveCredentials({ cookieSource: 'safari' });

      expect(result.cookies.authToken).toBe('twitter_auth');
      expect(result.cookies.ct0).toBe('twitter_ct0');
    });

    it('should trim whitespace from values', async () => {
      process.env.AUTH_TOKEN = '  trimmed_auth  ';
      process.env.CT0 = '  trimmed_ct0  ';

      const { resolveCredentials } = await import('../src/lib/cookies.js');
      const result = await resolveCredentials({});

      expect(result.cookies.authToken).toBe('trimmed_auth');
      expect(result.cookies.ct0).toBe('trimmed_ct0');
    });

    it('should treat empty strings as null', async () => {
      process.env.AUTH_TOKEN = '   ';
      process.env.CT0 = '';

      const { resolveCredentials } = await import('../src/lib/cookies.js');
      const result = await resolveCredentials({ cookieSource: 'safari' });

      expect(result.cookies.authToken).toBeNull();
      expect(result.cookies.ct0).toBeNull();
      expect(result.warnings.length).toBeGreaterThan(0);
    });

    it('should warn when credentials are missing', async () => {
      const { resolveCredentials } = await import('../src/lib/cookies.js');
      const result = await resolveCredentials({ cookieSource: 'safari' });

      expect(result.warnings).toContain(
        'Missing auth_token - provide via --auth-token, AUTH_TOKEN env var, or login to x.com in Safari/Chrome/Firefox',
      );
      expect(result.warnings).toContain(
        'Missing ct0 - provide via --ct0, CT0 env var, or login to x.com in Safari/Chrome/Firefox',
      );
    });

    it('falls back to Chrome when enabled and Firefox disabled', async () => {
      const fs = await import('node:fs');
      const { execSync } = await import('node:child_process');
      (fs.existsSync as unknown as vi.Mock).mockImplementation((path: string) => path.includes('Cookies'));
      (fs.copyFileSync as unknown as vi.Mock).mockImplementation(() => {});
      (execSync as unknown as vi.Mock).mockImplementation((cmd: string) => {
        if (cmd.includes('sqlite3')) {
          return 'auth_token|746573745f61757468\nct0|746573745f637430';
        }
        return '';
      });

      const { resolveCredentials } = await import('../src/lib/cookies.js');
      const result = await resolveCredentials({ cookieSource: 'chrome', chromeProfile: 'Default' });

      expect(result.cookies.authToken).toBe('test_auth');
      expect(result.cookies.ct0).toBe('test_ct0');
      expect(result.cookies.source).toContain('Chrome');
    });
  });

  describe('extractCookiesFromSafari', () => {
    itIfDarwin('returns cookies from Safari binarycookies', async () => {
      const fs = await import('node:fs');
      (fs.existsSync as unknown as vi.Mock).mockImplementation((path: string) =>
        path.toLowerCase().endsWith('cookies.binarycookies'),
      );
      (fs.copyFileSync as unknown as vi.Mock).mockImplementation(() => {});
      (fs.mkdtempSync as unknown as vi.Mock).mockReturnValue('/tmp/test-dir');
      (fs.readFileSync as unknown as vi.Mock).mockReturnValue(
        buildSafariCookiesFile([
          buildSafariCookieRecord({ domain: '.x.com', name: 'auth_token', value: 'safari_auth' }),
          buildSafariCookieRecord({ domain: '.x.com', name: 'ct0', value: 'safari_ct0' }),
        ]),
      );

      const { extractCookiesFromSafari } = await import('../src/lib/cookies.js');
      const result = await extractCookiesFromSafari();

      expect(result.cookies.authToken).toBe('safari_auth');
      expect(result.cookies.ct0).toBe('safari_ct0');
      expect(result.cookies.source).toBe('Safari');
    });

    itIfDarwin('prefers Safari over Chrome when both are available', async () => {
      const fs = await import('node:fs');

      (fs.existsSync as unknown as vi.Mock).mockImplementation((path: string) => {
        const lower = path.toLowerCase();
        if (lower.endsWith('cookies.binarycookies')) return true;
        if (lower.includes('chrome') && lower.endsWith('cookies')) return true;
        return false;
      });
      (fs.copyFileSync as unknown as vi.Mock).mockImplementation(() => {});
      (fs.mkdtempSync as unknown as vi.Mock).mockReturnValue('/tmp/test-dir');
      (fs.readFileSync as unknown as vi.Mock).mockReturnValue(
        buildSafariCookiesFile([
          buildSafariCookieRecord({ domain: '.x.com', name: 'auth_token', value: 'safari_auth' }),
          buildSafariCookieRecord({ domain: '.x.com', name: 'ct0', value: 'safari_ct0' }),
        ]),
      );

      const { resolveCredentials } = await import('../src/lib/cookies.js');
      const result = await resolveCredentials({ cookieSource: ['safari', 'chrome'] });

      expect(result.cookies.authToken).toBe('safari_auth');
      expect(result.cookies.ct0).toBe('safari_ct0');
    });
  });

  describe('extractCookiesFromChrome', () => {
    it('returns cookies when sqlite yields hex values', async () => {
      const fs = await import('node:fs');
      const { execSync } = await import('node:child_process');
      // Pretend Chrome cookie DB exists
      (fs.existsSync as unknown as vi.Mock).mockImplementation((path: string) => path.includes('Cookies'));
      (fs.copyFileSync as unknown as vi.Mock).mockImplementation(() => {});
      // sqlite output with hex strings ("test_auth", "test_ct0")
      (execSync as unknown as vi.Mock).mockImplementation((cmd: string) => {
        if (cmd.includes('sqlite3')) {
          return 'auth_token|746573745f61757468\nct0|746573745f637430';
        }
        return '';
      });

      const { extractCookiesFromChrome } = await import('../src/lib/cookies.js');
      const result = await extractCookiesFromChrome('Default');

      expect(result.cookies.authToken).toBe('test_auth');
      expect(result.cookies.ct0).toBe('test_ct0');
      expect(result.cookies.source).toContain('Chrome');
      expect(result.warnings).toHaveLength(0);
    });

    it('warns when Chrome DB exists but contains no cookies', async () => {
      const fs = await import('node:fs');
      const { execSync } = await import('node:child_process');
      (fs.existsSync as unknown as vi.Mock).mockImplementation((path: string) => path.includes('Cookies'));
      (fs.copyFileSync as unknown as vi.Mock).mockImplementation(() => {});
      (execSync as unknown as vi.Mock).mockReturnValue('');

      const { extractCookiesFromChrome } = await import('../src/lib/cookies.js');
      const result = await extractCookiesFromChrome('Default');

      expect(result.cookies.authToken).toBeNull();
      expect(result.cookies.ct0).toBeNull();
      expect(result.warnings.some((w) => w.includes('No Twitter cookies found in Chrome'))).toBe(true);
    });
  });

  describe('extractCookiesFromFirefox', () => {
    it('warns when Firefox cookies database is missing', async () => {
      const { extractCookiesFromFirefox } = await import('../src/lib/cookies.js');
      const result = await extractCookiesFromFirefox('missing-profile');

      expect(result.cookies.authToken).toBeNull();
      expect(result.cookies.ct0).toBeNull();
      expect(result.warnings).toContain('Firefox cookies database not found.');
    });

    it('warns when Firefox DB exists but contains no cookies', async () => {
      const fs = await import('node:fs');
      const { execSync } = await import('node:child_process');
      (fs.existsSync as unknown as vi.Mock).mockImplementation((path: string) => {
        const lower = path.toLowerCase();
        if (lower.endsWith('cookies.sqlite')) return true;
        if (lower.includes('firefox')) return true;
        return false;
      });
      (fs.readdirSync as unknown as vi.Mock).mockReturnValue([
        { isDirectory: () => true, name: 'abc.default-release' },
      ]);
      (fs.copyFileSync as unknown as vi.Mock).mockImplementation(() => {});
      (fs.mkdtempSync as unknown as vi.Mock).mockReturnValue('/tmp/test-dir');
      (execSync as unknown as vi.Mock).mockReturnValue('');

      const { extractCookiesFromFirefox } = await import('../src/lib/cookies.js');
      const result = await extractCookiesFromFirefox('abc.default-release');

      expect(result.cookies.authToken).toBeNull();
      expect(result.cookies.ct0).toBeNull();
      expect(result.warnings.some((w) => w.includes('No Twitter cookies found in Firefox'))).toBe(true);
    });
  });
});