#!/usr/bin/env node
/**
 * patch-p1-2-jsonl-baseline-init.js
 *
 * P1.2 step2: 给 evolution-log.jsonl + route-feedback.jsonl 创建 HMAC baseline 快照
 *
 * 输出: <jsonl>.hmac-baseline.json (只读快照)
 *
 * warn 模式策略:
 *   - baseline 一旦创建后只增（写入新行不改 baseline）
 *   - 周期 verifier 跑时若发现 drift → 仅记录到 evolution-log violation 行
 *   - 用户切 enforce 后才禁止 drift（需另写 enforce 脚本）
 */

'use strict';
const fs = require('fs');
const path = require('path');

const ROOT = path.join(__dirname, '..', '..');
const TARGETS = [
  { jsonl: path.join(ROOT, 'evolution-log.jsonl'), label: 'evolution-log' },
  { jsonl: path.join(ROOT, 'debug', 'route-feedback.jsonl'), label: 'route-feedback' },
];

let mod;
try {
  mod = require(path.join(ROOT, 'hooks', 'lib', 'jsonl-hmac.js'));
} catch (e) {
  process.stderr.write('[ERROR] jsonl-hmac.js lib not found. Run patch-p1-2-jsonl-hmac-lib.js first.\n');
  process.exit(1);
}

let okCount = 0, skipCount = 0, errCount = 0;

for (const { jsonl, label } of TARGETS) {
  const baselinePath = jsonl + '.hmac-baseline.json';

  if (!fs.existsSync(jsonl)) {
    process.stdout.write('[SKIP] ' + label + ': source not found (' + jsonl + ')\n');
    skipCount++;
    continue;
  }

  if (fs.existsSync(baselinePath)) {
    process.stdout.write('[SKIP] ' + label + ': baseline already exists\n');
    skipCount++;
    continue;
  }

  const result = mod.writeBaseline(jsonl, baselinePath);
  if (!result.ok) {
    process.stderr.write('[ERROR] ' + label + ': ' + result.error + '\n');
    errCount++;
    continue;
  }

  process.stdout.write('[OK] ' + label + ' baseline created\n');
  process.stdout.write('     lines=' + result.baseline.lineCount + ' sig=' + (result.baseline.sig || '').slice(0, 16) + '...\n');
  process.stdout.write('     fingerprint=' + result.baseline.hmacKeyFingerprint + '\n');
  okCount++;
}

process.stdout.write('\n[SUMMARY] ok=' + okCount + ' skip=' + skipCount + ' err=' + errCount + '\n');
process.exit(errCount > 0 ? 1 : 0);