import test from 'node:test';
import assert from 'node:assert/strict';

import { buildRiskSignature, summarizeRiskTrend } from './xiaobao-risk-trend';
import type { XiaobaoRiskSnapshot } from './xiaobao-risk-trend';

function snapshot(patch: Partial<XiaobaoRiskSnapshot>): XiaobaoRiskSnapshot {
  return {
    versionId: 'ver-1',
    date: '2026-06-27',
    riskScore: 38,
    riskLevel: 'attention',
    openBugCount: 0,
    failedTestCount: 0,
    blockedCount: 0,
    silentRiskCount: 0,
    confidence: 80,
    createdAt: '2026-06-27T01:00:00.000Z',
    ...patch,
  };
}

test('summarizeRiskTrend detects continuous rising risk across three snapshots', () => {
  const trend = summarizeRiskTrend([
    snapshot({ riskScore: 71, createdAt: '2026-06-29T01:00:00.000Z', date: '2026-06-29' }),
    snapshot({ riskScore: 38, createdAt: '2026-06-27T01:00:00.000Z', date: '2026-06-27' }),
    snapshot({ riskScore: 52, createdAt: '2026-06-28T01:00:00.000Z', date: '2026-06-28' }),
  ]);

  assert.equal(trend.direction, 'up');
  assert.equal(trend.delta, 33);
  assert.equal(trend.pattern, 'continuous_rising');
});

test('buildRiskSignature changes when score and bug counts change', () => {
  const base = buildRiskSignature(snapshot({ riskScore: 52, openBugCount: 1 }));
  const changed = buildRiskSignature(snapshot({ riskScore: 71, openBugCount: 2 }));

  assert.notEqual(base, changed);
});