/**
 * QR payload tests — instance-relative contract.
 *
 * The service mints `/api/alarm/a/{alertId}#{token}` (no host) and the client
 * composes `{configuredOrigin}{qrPayload}`. The parser matches path shape +
 * fragment, never host, so legacy `alarm.dcntrlized.org` codes and other
 * instances' codes still work.
 */
import {
  buildQrPayload,
  buildQrSchemePayload,
  parseManualToken,
  parseQrPayload,
  qrErrorMessage,
  truncateToken,
} from '../src/lib/qrPayload';

const ID = 'alr_7f3c9a1b2d';
const TOKEN = 'sub_9Qx2mZp4Lk7VeR1sTn0';
const ORIGIN = 'https://instance.example';

describe('buildQrPayload', () => {
  it('composes the service path under the configured origin', () => {
    expect(buildQrPayload(ID, TOKEN, ORIGIN)).toBe(`${ORIGIN}/api/alarm/a/${ID}#${TOKEN}`);
  });

  it('strips a trailing slash on the origin', () => {
    expect(buildQrPayload(ID, TOKEN, `${ORIGIN}/`)).toBe(`${ORIGIN}/api/alarm/a/${ID}#${TOKEN}`);
  });

  it('renders a host-free relative path when no origin is configured', () => {
    expect(buildQrPayload(ID, TOKEN)).toBe(`/api/alarm/a/${ID}#${TOKEN}`);
  });

  it('keeps the pre-existing scheme builder for old codes but mints no new host', () => {
    expect(buildQrSchemePayload(ID, TOKEN)).toBe(`dcntrlized-alarm://a/${ID}#${TOKEN}`);
  });
});

describe('parseQrPayload — path shape, never host', () => {
  it('parses the composed payload', () => {
    const res = parseQrPayload(buildQrPayload(ID, TOKEN, ORIGIN));
    expect(res).toEqual({
      ok: true,
      payload: { alertId: ID, subscribeToken: TOKEN, source: 'url' },
    });
  });

  it('accepts a relative /api/alarm/a/{id}#{token}', () => {
    const res = parseQrPayload(`/api/alarm/a/${ID}#${TOKEN}`);
    expect(res.ok && res.payload.alertId).toBe(ID);
    expect(res.ok && res.payload.source).toBe('relative');
  });

  it('accepts a legacy https://alarm.dcntrlized.org/a/{id}#{token}', () => {
    const res = parseQrPayload(`https://alarm.dcntrlized.org/a/${ID}#${TOKEN}`);
    expect(res.ok && res.payload.alertId).toBe(ID);
    expect(res.ok && res.payload.subscribeToken).toBe(TOKEN);
  });

  it('accepts a full http(s) URL on any host (host grants nothing)', () => {
    expect(parseQrPayload(`https://evil.example.com/a/${ID}#${TOKEN}`).ok).toBe(true);
    expect(parseQrPayload(`http://127.0.0.1:8080/api/alarm/a/${ID}#${TOKEN}`).ok).toBe(true);
    expect(parseQrPayload(`https://staging.alarm.dcntrlized.org/a/${ID}#${TOKEN}`).ok).toBe(true);
  });

  it('rejects a URL whose path is not an alarm path', () => {
    expect(parseQrPayload(`https://example.com/foo/bar#${TOKEN}`)).toEqual({
      ok: false,
      error: 'not-an-alarm-code',
    });
  });

  it('rejects a foreign scheme', () => {
    expect(parseQrPayload(`ftp://example.com/a/${ID}#${TOKEN}`)).toEqual({
      ok: false,
      error: 'not-an-alarm-code',
    });
  });

  it('parses the pre-existing custom scheme', () => {
    const res = parseQrPayload(buildQrSchemePayload(ID, TOKEN));
    expect(res.ok && res.payload.source).toBe('scheme');
    expect(res.ok && res.payload.alertId).toBe(ID);
  });

  it('accepts a relative a/{id}#{token} and raw {id}#{token}', () => {
    expect(parseQrPayload(`a/${ID}#${TOKEN}`).ok).toBe(true);
    const raw = parseQrPayload(`${ID}#${TOKEN}`);
    expect(raw.ok && raw.payload.source).toBe('raw');
  });

  it('tolerates whitespace, a trailing slash and query noise', () => {
    const res = parseQrPayload(`  https://alarm.dcntrlized.org/a/${ID}/?utm=x#${TOKEN}  `);
    expect(res.ok && res.payload.alertId).toBe(ID);
    expect(res.ok && res.payload.subscribeToken).toBe(TOKEN);
  });

  it('reports empty, missing token and missing alert id', () => {
    expect(parseQrPayload('   ')).toEqual({ ok: false, error: 'empty' });
    expect(parseQrPayload(`https://alarm.dcntrlized.org/a/${ID}`)).toEqual({
      ok: false,
      error: 'missing-token',
    });
    expect(parseQrPayload(`https://alarm.dcntrlized.org/a/#${TOKEN}`)).toEqual({
      ok: false,
      error: 'missing-alert-id',
    });
  });

  it('never throws on garbage', () => {
    for (const junk of ['###', 'https://', '://a/b#c', '\u0000', '{"json":true}']) {
      expect(() => parseQrPayload(junk)).not.toThrow();
    }
  });

  it('round-trips ids that need encoding', () => {
    const weird = 'alr/with space';
    const res = parseQrPayload(buildQrPayload(weird, TOKEN, ORIGIN));
    expect(res.ok && res.payload.alertId).toBe(weird);
  });
});

describe('parseManualToken', () => {
  it('accepts a bare token when the alert id is known', () => {
    expect(parseManualToken(TOKEN, ID)).toEqual({
      ok: true,
      payload: { alertId: ID, subscribeToken: TOKEN, source: 'raw' },
    });
  });

  it('accepts a full payload even when an id is also supplied', () => {
    const res = parseManualToken(buildQrPayload(ID, TOKEN, ORIGIN), 'other');
    expect(res.ok && res.payload.alertId).toBe(ID);
  });

  it('fails a bare token with no known alert id', () => {
    expect(parseManualToken(TOKEN, '')).toEqual({ ok: false, error: 'missing-alert-id' });
  });

  it('fails empty input', () => {
    expect(parseManualToken('', ID)).toEqual({ ok: false, error: 'empty' });
  });
});

describe('copy helpers', () => {
  it('truncates tokens to 12 chars + ellipsis', () => {
    expect(truncateToken('0123456789abcdef')).toBe('0123456789ab…');
    expect(truncateToken('short')).toBe('short');
  });

  it('has a message for every error', () => {
    for (const err of ['empty', 'not-an-alarm-code', 'missing-alert-id', 'missing-token'] as const) {
      expect(qrErrorMessage(err).length).toBeGreaterThan(0);
    }
  });
});