import { describe, it, expect } from 'vitest';
import { weave, flattenForPost, type RepoEnvelopes } from '../src/lib/weave';
import type { Envelope } from '../src/types';

function env(uri: string, nodes: string[], triplets: Array<[string, string, string]>): Envelope {
  return {
    source: { uri, content_hash: uri },
    extractor: { model: 'local-harvest', tier: 'shallow' },
    nodes: nodes.map((n) => ({ name: n, embed: true })),
    triplets: triplets.map(([s, p, o]) => ({ subject: s, predicate: p, object: o })),
  };
}

const repos: RepoEnvelopes[] = [
  { repo: 'o/repoA', envelopes: [env('github:o/repoA@x.md', ['Arcrun', '餵食器'], [['Arcrun', '包含', '餵食器']])] },
  { repo: 'o/repoB', envelopes: [env('github:o/repoB@y.md', ['Arcrun', '圖層'], [['Arcrun', '依賴', '圖層']])] },
];

describe('weave', () => {
  it('偵測跨庫橋（同名節點跨 ≥2 repo）', () => {
    const r = weave(repos);
    const bridge = r.bridges.find((b) => b.node === 'Arcrun');
    expect(bridge?.repos).toEqual(['o/repoA', 'o/repoB']);
    expect(r.totalTriplets).toBe(2);
  });

  it('偵測跨庫異見（同 s/o 對、不同謂詞跨 repo）', () => {
    const diverge: RepoEnvelopes[] = [
      { repo: 'o/repoA', envelopes: [env('github:o/repoA@x.md', ['X', 'Y'], [['X', '支持', 'Y']])] },
      { repo: 'o/repoB', envelopes: [env('github:o/repoB@y.md', ['X', 'Y'], [['X', '反對', 'Y']])] },
    ];
    const r = weave(diverge);
    expect(r.divergences.length).toBe(1);
    expect(r.divergences[0].predicatesByRepo.map((p) => p.predicate).sort()).toEqual(['反對', '支持']);
  });

  it('flattenForPost 攤平所有 envelope（順序穩定）', () => {
    expect(flattenForPost(repos).length).toBe(2);
  });

  it('ingest 不算 bridge_score（橋只標 repos，無分數欄位）', () => {
    const r = weave(repos);
    expect(r.bridges[0]).not.toHaveProperty('bridge_score');
  });
});