/**
 * Finding persistence.
 *
 * The fingerprint is the part worth testing hardest. It decides whether a
 * finding seen on two consecutive polls is the SAME finding — and if it is
 * wrong, the "how long has this been open" measurement, which is the single
 * most useful thing the table records, is destroyed.
 */
jest.mock('@/api/doormile', () => ({
  reportFindings: jest.fn().mockResolvedValue({}),
  reportFindingActed: jest.fn().mockResolvedValue({})
}));

const api = require('@/api/doormile');
const { fingerprintOf, reportScan, reportActed, __resetForTests } =
  require('@/lib/assistant/agent/findingReport');

const finding = (skillId, bookingids, extra = {}) => ({
  skillId,
  severity: 'warning',
  title: 'Something needs attention',
  proposal: { tool: 'notifyRider', scope: bookingids.map((bookingid) => ({ bookingid })) },
  ...extra
});

beforeEach(() => {
  jest.clearAllMocks();
  __resetForTests();
  // The module reads tenantid from localStorage.
  localStorage.setItem('tenantid', '7');
});

describe('fingerprintOf', () => {
  it('is stable across scans regardless of scope order', () => {
    // Scope order is not guaranteed between scans; an unsorted fingerprint
    // would make the same problem look new every poll.
    expect(fingerprintOf(finding('SlaGuardian', [3, 1, 2])))
      .toBe(fingerprintOf(finding('SlaGuardian', [1, 2, 3])));
  });

  it('ignores severity, so an escalating finding stays the same finding', () => {
    // An ageing SLA breach climbs warning -> critical while the underlying
    // problem is unchanged. Including severity would reset firstseenat and
    // report a six-hour-old problem as brand new.
    const a = fingerprintOf(finding('SlaGuardian', [1], { severity: 'warning' }));
    const b = fingerprintOf(finding('SlaGuardian', [1], { severity: 'critical' }));
    expect(a).toBe(b);
  });

  it('distinguishes two proposals from ONE skill over the same bookings', () => {
    // SlaGuardian raises both "notify the riders" and "assign these orders"
    // for the same parcels. Keyed on skill + scope alone these collide, and
    // since the fingerprint is the upsert key one would silently overwrite the
    // other. Found by running the real page, not by these tests.
    const notify = finding('SlaGuardian', [1, 2, 3]);
    const assign = { ...finding('SlaGuardian', [1, 2, 3]), proposal: { tool: 'assignMiler', scope: [1, 2, 3].map((bookingid) => ({ bookingid })) } };
    expect(fingerprintOf(notify)).not.toBe(fingerprintOf(assign));
  });

  it('distinguishes different skills on the same booking', () => {
    expect(fingerprintOf(finding('SlaGuardian', [1])))
      .not.toBe(fingerprintOf(finding('CashExposure', [1])));
  });

  it('distinguishes different scopes', () => {
    expect(fingerprintOf(finding('SlaGuardian', [1])))
      .not.toBe(fingerprintOf(finding('SlaGuardian', [1, 2])));
  });

  it('survives a missing scope rather than throwing', () => {
    expect(fingerprintOf({ skillId: 'SlaGuardian' })).toBe('SlaGuardian:none:');
    expect(fingerprintOf({})).toBe('unknown:none:');
  });
});

describe('reportScan', () => {
  it('sends ids only, never personal data', async () => {
    await reportScan([finding('SlaGuardian', [11])]);
    const payload = api.reportFindings.mock.calls[0][0];
    const serialised = JSON.stringify(payload);
    expect(payload.findings[0].bookingids).toEqual([11]);
    // The findings table measures the skills; it is not a second copy of the
    // bookings.
    expect(serialised).not.toMatch(/phone|address|recipient|ridername/i);
  });

  it('reports what cleared since the previous scan', async () => {
    await reportScan([finding('SlaGuardian', [1]), finding('CashExposure', [2])]);
    api.reportFindings.mockClear();

    await reportScan([finding('SlaGuardian', [1])]);
    const payload = api.reportFindings.mock.calls[0][0];
    expect(payload.cleared).toEqual(['CashExposure:notifyRider:2']);
  });

  it('skips the round trip when nothing is open and nothing cleared', async () => {
    await reportScan([]);
    expect(api.reportFindings).not.toHaveBeenCalled();
  });

  it('still reports when everything clears at once', async () => {
    await reportScan([finding('SlaGuardian', [1])]);
    api.reportFindings.mockClear();
    await reportScan([]);
    expect(api.reportFindings).toHaveBeenCalledWith({
      findings: [], cleared: ['SlaGuardian:notifyRider:1']
    });
  });

  it('never throws when the backend refuses', async () => {
    api.reportFindings.mockRejectedValueOnce(new Error('403'));
    // A dispatcher looking at a stalled parcel does not care that telemetry is
    // down, and must not be shown an error about it.
    await expect(reportScan([finding('SlaGuardian', [1])])).resolves.toBeUndefined();
  });

  it('retries the clear set after a failure instead of losing it', async () => {
    await reportScan([finding('SlaGuardian', [1])]);
    api.reportFindings.mockClear();

    // The scan where it clears fails...
    api.reportFindings.mockRejectedValueOnce(new Error('503'));
    await reportScan([]);

    // ...so the next scan must still report it cleared. Advancing `previous`
    // on a failed post would drop the clear permanently and leave the finding
    // open forever.
    await reportScan([]);
    const last = api.reportFindings.mock.calls.at(-1)[0];
    expect(last.cleared).toEqual(['SlaGuardian:notifyRider:1']);
  });
});

describe('reportActed', () => {
  it('records a clean success as ok', async () => {
    await reportActed(finding('SlaGuardian', [1]), { ok: true });
    expect(api.reportFindingActed).toHaveBeenCalledWith('SlaGuardian:notifyRider:1', 'ok');
  });

  it('records a partial success as partial, not ok', async () => {
    // Six riders notified out of eight is not a success. Flattening it would
    // lose exactly the distinction actions.js preserves.
    await reportActed(finding('SlaGuardian', [1, 2]), { ok: true, unreachable: ['DM-2 (no device)'] });
    expect(api.reportFindingActed).toHaveBeenCalledWith('SlaGuardian:notifyRider:1,2', 'partial');
  });

  it('records a failure', async () => {
    await reportActed(finding('SlaGuardian', [1]), { ok: false });
    expect(api.reportFindingActed).toHaveBeenCalledWith('SlaGuardian:notifyRider:1', 'failed');
  });

  it('never throws when the backend refuses', async () => {
    api.reportFindingActed.mockRejectedValueOnce(new Error('500'));
    // The action itself already happened and was reported to the operator.
    await expect(reportActed(finding('SlaGuardian', [1]), { ok: true })).resolves.toBeUndefined();
  });
});