const {
  findMatchingClient,
  getClientStatus,
  formatLastSeen,
  buildMerakiClientLink,
} = require('../utils/merakiMatcher');

describe('merakiMatcher', () => {
  const sampleClients = [
    { id: 'c1', description: 'Register 305', status: 'Online', lastSeen: '2025-01-01T10:00:00Z' },
    {
      id: 'c2',
      description: 'Printer Front',
      status: 'Offline',
      lastSeen: Date.now() - 5 * 60 * 1000,
    },
    { id: 'c3', description: '192.168.10.45 - Terminal', status: 'Online', lastSeen: null },
    { id: 'c4', description: 'SRV-042', status: 'Online' },
  ];

  describe('findMatchingClient', () => {
    it('matches by exact or substring on description', () => {
      expect(findMatchingClient(sampleClients, { name: 'Register 305' })).toBe(sampleClients[0]);
      expect(findMatchingClient(sampleClients, { name: 'printer' })).toBe(sampleClients[1]);
    });

    it('matches using multiple identifier fields', () => {
      const match = findMatchingClient(sampleClients, {
        deviceName: 'Terminal',
        ip_address: '192.168.10.45',
      });
      expect(match).toBe(sampleClients[2]);
    });

    it('matches MDM style UserName / DeviceFriendlyName', () => {
      const match = findMatchingClient(sampleClients, {
        UserName: 'SRV-042',
        DeviceFriendlyName: 'Server 042',
      });
      expect(match).toBe(sampleClients[3]);
    });

    it('returns null when no clients or no match', () => {
      expect(findMatchingClient([], { name: 'foo' })).toBeNull();
      expect(findMatchingClient(sampleClients, { name: 'nonexistent' })).toBeNull();
    });
  });

  describe('getClientStatus', () => {
    it('returns correct emojis and fallback', () => {
      expect(getClientStatus({ status: 'Online' })).toBe('✅ Online');
      expect(getClientStatus({ status: 'Offline' })).toBe('❌ Offline');
      expect(getClientStatus(null)).toBe('❓ Unknown');
      expect(getClientStatus(undefined)).toBe('❓ Unknown');
    });
  });

  describe('formatLastSeen', () => {
    it('handles missing value', () => {
      expect(formatLastSeen(null)).toBe('N/A');
      expect(formatLastSeen(undefined)).toBe('N/A');
    });

    it('formats recent times', () => {
      const justNow = new Date();
      expect(formatLastSeen(justNow)).toBe('Just now');

      const tenMin = new Date(Date.now() - 10 * 60 * 1000);
      expect(formatLastSeen(tenMin)).toMatch(/10 min ago/);
    });
  });

  describe('buildMerakiClientLink', () => {
    const network = { id: 'N_123', name: 'Store 305', url: 'https://example.com/n/ABC123' };

    it('builds a client link when possible', () => {
      const client = { id: 'c99' };
      const link = buildMerakiClientLink(network, client);
      expect(link).toContain('/manage/clients/c99/overview');
    });

    it('returns empty string on bad input', () => {
      expect(buildMerakiClientLink(null, {})).toBe('');
      expect(buildMerakiClientLink(network, null)).toBe('');
    });
  });
});