jest.mock('../config', () => ({ logLevel: 'error' }));

jest.mock('../integrations/atlas/atlasClient', () => {
  const actual = jest.requireActual('../integrations/atlas/atlasClient');
  return {
    ...actual,
    atlasGet: jest.fn(),
  };
});

const { atlasGet, AtlasUnavailableError } = require('../integrations/atlas/atlasClient');
const devices = require('../integrations/atlas/atlasDevices');

function pageOf(items, nextPage = null) {
  return { items, next_page: nextPage };
}

describe('atlasDevices pagination', () => {
  beforeEach(() => {
    jest.clearAllMocks();
    devices.resetCacheForTests();
  });

  it('stops paginating when a short page is returned', async () => {
    // 100 items + next_page=2 → keep going; 5 items on page 2 → stop.
    const page1 = Array.from({ length: devices.PAGE_SIZE }, (_, i) => ({ id: `d${i}`, name: 'x' }));
    const page2 = Array.from({ length: 5 }, (_, i) => ({ id: `d${100 + i}`, name: 'x' }));
    atlasGet.mockResolvedValueOnce(pageOf(page1, 2)).mockResolvedValueOnce(pageOf(page2, 3));

    const list = await devices.getAtlasDeviceList();
    expect(list).toHaveLength(105);
    expect(atlasGet).toHaveBeenCalledTimes(2);
  });

  it('stops paginating when next_page is missing even on a full page', async () => {
    const page1 = Array.from({ length: devices.PAGE_SIZE }, (_, i) => ({ id: `d${i}`, name: 'x' }));
    atlasGet.mockResolvedValueOnce(pageOf(page1, null));

    const list = await devices.getAtlasDeviceList();
    expect(list).toHaveLength(devices.PAGE_SIZE);
    expect(atlasGet).toHaveBeenCalledTimes(1);
  });

  it('preserves the previous cache when a mid-pagination call fails', async () => {
    // First refresh succeeds with one device.
    atlasGet.mockResolvedValueOnce(pageOf([{ id: 'd1', name: 'US000782AMP' }], null));
    await devices.getAtlasDeviceList(true);

    // Force a refresh that fails on page 1 → cache should not be wiped.
    atlasGet.mockRejectedValueOnce(new Error('boom'));
    const list = await devices.getAtlasDeviceList(true);
    expect(list).toHaveLength(1);
    expect(list[0].id).toBe('d1');
  });

  it('propagates AtlasUnavailableError so callers can render a banner', async () => {
    atlasGet.mockRejectedValueOnce(new AtlasUnavailableError('ATLAS_AUTH_KEY is not set'));
    await expect(devices.getAtlasDeviceList(true)).rejects.toBeInstanceOf(AtlasUnavailableError);
  });
});

describe('findAtlasDevicesForStore', () => {
  beforeEach(() => {
    jest.clearAllMocks();
    devices.resetCacheForTests();
  });

  it('matches the zero-padded store number against device names', async () => {
    atlasGet.mockResolvedValueOnce(
      pageOf(
        [
          { id: '1', name: 'US000782AMP' }, // match
          { id: '2', name: 'us000782DSP' }, // match (case-insensitive)
          { id: '3', name: 'US007820AMP' }, // NOT — 782 unpadded would false-positive
          { id: '4', name: 'US000305AMP' },
        ],
        null
      )
    );

    const matches = await devices.findAtlasDevicesForStore('782');
    expect(matches.map(m => m.id).sort()).toEqual(['1', '2']);
  });

  it('handles already-padded store numbers and whitespace', async () => {
    atlasGet.mockResolvedValueOnce(pageOf([{ id: '1', name: 'US000305AMP' }], null));

    const matches = await devices.findAtlasDevicesForStore('  000305  ');
    expect(matches).toHaveLength(1);
  });
});

describe('getAtlasDevicesForStore', () => {
  beforeEach(() => {
    jest.clearAllMocks();
    devices.resetCacheForTests();
  });

  it('returns { devices: [] } when no matches', async () => {
    atlasGet.mockResolvedValueOnce(pageOf([{ id: '1', name: 'US000305AMP' }], null));
    const result = await devices.getAtlasDevicesForStore('999');
    expect(result).toEqual({ devices: [] });
  });

  it('fetches detail per matched device and merges over the list summary', async () => {
    atlasGet
      // Initial list call.
      .mockResolvedValueOnce(pageOf([{ id: 'd1', name: 'US000782AMP', status: 'unknown' }], null))
      // Detail call for d1 — adds richer state.
      .mockResolvedValueOnce({
        id: 'd1',
        name: 'US000782AMP',
        status: 'online',
        state: { IpAddress: '10.0.0.5', MacAddress: 'aa:bb:cc:dd:ee:ff' },
      });

    const result = await devices.getAtlasDevicesForStore('782');
    expect(result.devices).toHaveLength(1);
    expect(result.devices[0]).toEqual(
      expect.objectContaining({
        id: 'd1',
        name: 'US000782AMP',
        status: 'online',
        state: { IpAddress: '10.0.0.5', MacAddress: 'aa:bb:cc:dd:ee:ff' },
      })
    );
  });

  it('returns { unavailable: true } with the auth reason when the key is missing', async () => {
    atlasGet.mockRejectedValueOnce(new AtlasUnavailableError('ATLAS_AUTH_KEY is not set'));
    const result = await devices.getAtlasDevicesForStore('782');
    expect(result.unavailable).toBe(true);
    expect(result.reason).toMatch(/ATLAS_AUTH_KEY/);
    expect(result.devices).toEqual([]);
  });

  it('returns { unavailable: true } with the transport reason on other lookup failures', async () => {
    atlasGet.mockRejectedValueOnce(new Error('ECONNRESET'));
    const result = await devices.getAtlasDevicesForStore('782');
    expect(result.unavailable).toBe(true);
    expect(result.reason).toMatch(/Atlas lookup failed/);
  });
});