import { describe, expect, it } from 'vitest';
import { ObjectId } from 'mongodb';
import { buildMatchContent, contentKey, kmRounded } from '../src/matcher/content.js';
import { distanceMeters, isHit } from '../src/matcher/geo.js';
import { matchFire, type MatchContext } from '../src/matcher/matcher.js';
import type { FireDoc, SubscriptionDoc } from '../src/matcher/types.js';

function fire(over: Partial<FireDoc> = {}): FireDoc {
  return {
    _id: new ObjectId(),
    lat: 40.4168,
    lon: -3.7038,
    when: new Date('2026-07-13T12:00:00Z'),
    type: 'viirs',
    createdAt: new Date('2026-07-13T12:05:00Z'),
    ...over,
  };
}

function sub(over: Partial<SubscriptionDoc> = {}): SubscriptionDoc {
  const lat = over.location?.lat ?? 40.42;
  const lon = over.location?.lon ?? -3.70;
  return {
    _id: new ObjectId(),
    location: { lat, lon },
    geo: { type: 'Point', coordinates: [lon, lat] },
    distance: 40,
    owner: 'u1',
    type: 'mobile',
    ...over,
  };
}

describe('content', () => {
  it('maps fire type to i18n key', () => {
    expect(contentKey('viirs')).toBe('kmnasa');
    expect(contentKey('modis')).toBe('kmnasa');
    expect(contentKey('vecinal')).toBe('kmvecinal');
  });
  it('rounds km to 1 decimal like the old node', () => {
    expect(kmRounded(64543)).toBe(64.5);
    expect(kmRounded(500)).toBe(0.5);
  });
  it('builds content verbatim incl. the Cyrillic км', () => {
    expect(buildMatchContent('viirs', 'es', 12.3)).toBe('🔥 Alerta de posible fuego a 12.3 км de distancia (fuente NASA)');
    expect(buildMatchContent('viirs', 'en', 5)).toBe('🔥 Alert of possible fire in 5 км of distance (source NASA)');
    expect(buildMatchContent('vecinal', 'es', 1.1)).toBe('🔥 Alerta vecinal de fuego a 1.1 км de distancia');
  });
  it('falls back to es for unknown langs', () => {
    expect(buildMatchContent('viirs', 'gl', 2)).toContain('lume');
  });
});

describe('geo', () => {
  it('computes distance and hit boundary', () => {
    const s = sub({ location: { lat: 40.4168, lon: -3.7038 }, distance: 1 });
    const f = fire({ lat: 40.4168, lon: -3.7038 });
    expect(distanceMeters(s, f)).toBe(0);
    expect(isHit(s, 0)).toBe(true);
  });
  it('respects the radius: just outside is not a hit', () => {
    const s = sub({ distance: 10 });
    expect(isHit(s, 10_000)).toBe(true); // exactly 10km
    expect(isHit(s, 10_001)).toBe(false);
  });
});

function ctx(over: Partial<MatchContext> = {}): MatchContext {
  return {
    candidateSubs: async () => [],
    existsNotifNear: async () => false,
    userLang: async () => 'es',
    ironPassword: 'x'.repeat(32),
    audienceTypes: new Set(['web', 'mobile']),
    now: () => new Date('2026-07-13T12:06:00Z'),
    ...over,
  };
}

describe('matchFire', () => {
  it('generates a notification doc identical in shape to node-red', async () => {
    const f = fire();
    const s = sub({ owner: 'u1', type: 'mobile', distance: 40 });
    const notifs = await matchFire(f, ctx({ candidateSubs: async () => [s] }));
    expect(notifs).toHaveLength(1);
    const n = notifs[0]!;
    expect(n.userId).toBe('u1');
    expect(n.subsId).toBe(s._id);
    expect(n.type).toBe('mobile');
    expect(n.geo).toEqual({ type: 'Point', coordinates: [f.lon, f.lat] });
    expect(n.when).toBe(f.when);
    expect(n.content).toContain('км');
    expect(typeof n.sealed).toBe('string');
    expect(n.sealed.startsWith('Fe26.2')).toBe(true);
  });

  it('skips subs outside their radius', async () => {
    const far = sub({ location: { lat: 41.5, lon: -3.7 }, distance: 1 }); // ~120km away, radius 1km
    const notifs = await matchFire(fire(), ctx({ candidateSubs: async () => [far] }));
    expect(notifs).toHaveLength(0);
  });

  it('dedupes against existing notifications within 500m', async () => {
    const s = sub();
    const notifs = await matchFire(fire(), ctx({ candidateSubs: async () => [s], existsNotifNear: async () => true }));
    expect(notifs).toHaveLength(0);
  });

  it('emits at most one notification per user per fire', async () => {
    const s1 = sub({ _id: new ObjectId(), owner: 'u1', distance: 50 });
    const s2 = sub({ _id: new ObjectId(), owner: 'u1', distance: 50 });
    const notifs = await matchFire(fire(), ctx({ candidateSubs: async () => [s1, s2] }));
    expect(notifs).toHaveLength(1);
    expect(notifs[0]!.subsId).toBe(s1._id); // first hit wins
  });

  it('ignores subscription types outside the audience (e.g. telegram)', async () => {
    const tg = sub({ type: 'telegram', chatId: 123 });
    const notifs = await matchFire(fire(), ctx({ candidateSubs: async () => [tg] }));
    expect(notifs).toHaveLength(0);
  });

  it('uses the owner language for content', async () => {
    const s = sub({ owner: 'uEN' });
    const notifs = await matchFire(fire(), ctx({ candidateSubs: async () => [s], userLang: async () => 'en' }));
    expect(notifs[0]!.content).toContain('source NASA');
  });
});