// tools/observer-verdicts.test.mjs
import { describe, it, expect } from 'vitest';
import { mkdtempSync, writeFileSync, rmSync } from 'node:fs';
import { tmpdir } from 'node:os';
import { join } from 'node:path';
import { readVerdictSnapshot, extractFourVerdicts } from './observer-verdicts.mjs';

describe('extractFourVerdicts (D1)', () => {
  it('снимок с четырьмя звеньями → все четыре с правильным status', () => {
    const snap = {
      router: { status: 'recommend', reason: 'r', ts: 1 },
      'mentor:plan': { status: 'GO', reason: 'm', ts: 2 },
      'judge:plan': { status: 'GO', reason: 'j', ts: 3 },
      'judge:gate3': { status: 'NO-GO', reason: 'g', ts: 4 },
    };
    const v = extractFourVerdicts(snap);
    expect(v.router.status).toBe('recommend');
    expect(v.mentor.status).toBe('GO');
    expect(v.judge.status).toBe('GO');
    expect(v.gate3.status).toBe('NO-GO');
  });
  it('несколько записей звена → берётся последняя по ts', () => {
    const snap = {
      'mentor:plan': { status: 'NO-GO', reason: 'old', ts: 1 },
      'mentor:spec': { status: 'GO', reason: 'new', ts: 5 },
    };
    expect(extractFourVerdicts(snap).mentor).toEqual({ status: 'GO', reason: 'new' });
  });
  it('отсутствующее звено → null', () => {
    expect(extractFourVerdicts({ router: { status: 'recommend', ts: 1 } }).mentor).toBeNull();
  });
  it('пустой снимок → все четыре null', () => {
    const v = extractFourVerdicts({});
    expect(v).toEqual({ router: null, mentor: null, judge: null, gate3: null });
  });
});

describe('readVerdictSnapshot (D1)', () => {
  it('читает файл снимка и агрегирует последнюю запись по стадии', () => {
    const baseDir = mkdtempSync(join(tmpdir(), 'verdict-snap-'));
    const obj = {
      h1: { router: { status: 'recommend', reason: 'r', ts: 1 }, 'mentor:plan': { status: 'NO-GO', reason: 'a', ts: 2 } },
      h2: { 'mentor:plan': { status: 'GO', reason: 'b', ts: 9 }, 'judge:plan': { status: 'GO', reason: 'j', ts: 10 } },
    };
    writeFileSync(join(baseDir, 'verdict-snapshot-sX.json'), JSON.stringify(obj));
    const snap = readVerdictSnapshot('sX', baseDir);
    expect(snap['router'].status).toBe('recommend');
    expect(snap['mentor:plan']).toMatchObject({ status: 'GO', ts: 9 }); // последняя по ts
    expect(snap['judge:plan'].status).toBe('GO');
    rmSync(baseDir, { recursive: true, force: true });
  });
  it('нет файла → {} (fail-safe)', () => {
    const baseDir = mkdtempSync(join(tmpdir(), 'verdict-snap-'));
    expect(readVerdictSnapshot('nope', baseDir)).toEqual({});
    rmSync(baseDir, { recursive: true, force: true });
  });
});