import { describe, expect, it } from 'vitest';
import { ObjectId } from 'mongodb';
import { compareShadow, notifKey } from '../src/matcher/compare.js';
import type { NotificationDoc } from '../src/types.js';

function n(userId: string, lon: number, lat: number, content = 'c'): NotificationDoc {
  return {
    _id: new ObjectId(),
    userId,
    content,
    geo: { type: 'Point', coordinates: [lon, lat] },
    type: 'mobile',
    when: new Date('2026-07-13T12:00:00Z'),
    sealed: 's',
  };
}

describe('compareShadow', () => {
  it('matches identical sets', () => {
    const a = [n('u1', -3.7, 40.4), n('u2', -4, 41)];
    const b = [n('u1', -3.7, 40.4), n('u2', -4, 41)];
    const diff = compareShadow(a, b);
    expect(diff.matched).toBe(2);
    expect(diff.shadowOnly).toHaveLength(0);
    expect(diff.realOnly).toHaveLength(0);
  });

  it('flags shadowOnly (spam risk) when we generate an extra notification', () => {
    const shadow = [n('u1', -3.7, 40.4), n('u3', -5, 42)];
    const real = [n('u1', -3.7, 40.4)];
    const diff = compareShadow(shadow, real);
    expect(diff.shadowOnly).toEqual([notifKey(n('u3', -5, 42))]);
    expect(diff.realOnly).toHaveLength(0);
  });

  it('flags realOnly (missing) when node-red had one we do not', () => {
    const shadow = [n('u1', -3.7, 40.4)];
    const real = [n('u1', -3.7, 40.4), n('u2', -4, 41)];
    const diff = compareShadow(shadow, real);
    expect(diff.realOnly).toEqual([notifKey(n('u2', -4, 41))]);
    expect(diff.shadowOnly).toHaveLength(0);
  });

  it('reports content mismatches on matched keys', () => {
    const shadow = [n('u1', -3.7, 40.4, 'nuevo texto')];
    const real = [n('u1', -3.7, 40.4, 'viejo texto')];
    const diff = compareShadow(shadow, real);
    expect(diff.matched).toBe(1);
    expect(diff.contentMismatches).toHaveLength(1);
    expect(diff.contentMismatches[0]).toMatchObject({ shadow: 'nuevo texto', real: 'viejo texto' });
  });
});