#!/usr/bin/env node
// weekly-kb-cron.mjs — Local cron wrapper for weekly KB maintenance.
// Runs sitemap polling + change report. If critical/high findings exist,
// spawns a local Claude Code session to update stale reference files.
//
// Crontab: 23 4 * * 3 node /path/to/weekly-kb-cron.mjs >> /tmp/kb-cron.log 2>&1
//
// Zero npm dependencies. Uses only node builtins.

import { execFileSync, execSync } from 'node:child_process';
import { readFileSync, existsSync, appendFileSync } from 'node:fs';
import { join, dirname } from 'node:path';
import { fileURLToPath } from 'node:url';

const __dirname = dirname(fileURLToPath(import.meta.url));
const PLUGIN_ROOT = join(__dirname, '..', '..');
const DATA_DIR = join(__dirname, 'data');
const CLAUDE_BIN = '/Users/ktg/.local/bin/claude';
const LOG_FILE = '/tmp/kb-cron.log';

const MAX_UPDATE_FILES = Infinity;

function log(msg) {
  const ts = new Date().toISOString();
  const line = `[${ts}] ${msg}`;
  console.log(line);
}

function run(script, args = []) {
  const fullPath = join(__dirname, script);
  log(`Running ${script} ${args.join(' ')}`);
  try {
    execFileSync('node', [fullPath, ...args], {
      stdio: 'inherit',
      timeout: 10 * 60 * 1000,
      cwd: PLUGIN_ROOT,
    });
  } catch (err) {
    log(`ERROR: ${script} failed: ${err.message}`);
    process.exit(1);
  }
}

// --- Step 1: Sitemap polling + discovery ---
log('=== Weekly KB Cron Start ===');
run('run-weekly-update.mjs', ['--force', '--discover']);

// --- Step 2: Read change report ---
const reportPath = join(DATA_DIR, 'change-report.json');
if (!existsSync(reportPath)) {
  log('No change report found. Exiting.');
  process.exit(0);
}

const report = JSON.parse(readFileSync(reportPath, 'utf8'));
const { critical = 0, high = 0, medium = 0, low = 0 } = report.by_priority || {};
log(`Change report: ${critical} critical, ${high} high, ${medium} medium, ${low} low`);

// --- Step 3: If critical/high exist, spawn Claude for updates ---
if (critical + high === 0) {
  log('No critical/high findings. Committing data updates only.');

  try {
    execSync('git add scripts/kb-update/data/', { cwd: PLUGIN_ROOT, stdio: 'pipe' });
    const status = execSync('git status --porcelain scripts/kb-update/data/', { cwd: PLUGIN_ROOT, encoding: 'utf8' });
    if (status.trim()) {
      execSync(
        'git commit -m "docs(architect): weekly KB poll — no stale files"',
        { cwd: PLUGIN_ROOT, stdio: 'pipe' }
      );
      execSync('git push origin main', { cwd: PLUGIN_ROOT, stdio: 'pipe' });
      log('Data committed and pushed.');
    } else {
      log('No data changes to commit.');
    }
  } catch (err) {
    log(`Git error: ${err.message}`);
  }

  log('=== Weekly KB Cron Done ===');
  process.exit(0);
}

// Build list of stale files (critical + high only, max MAX_UPDATE_FILES)
const staleFiles = (report.files || [])
  .filter(f => f.priority === 'critical' || f.priority === 'high' || f.priority === 'medium')
  .slice(0, MAX_UPDATE_FILES);

log(`Spawning Claude to update ${staleFiles.length} stale files...`);

const fileList = staleFiles.map(f => {
  const urls = (f.changed_urls || []).slice(0, 5).join('\n    ');
  return `- ${f.path} [${f.priority}]\n    Changed URLs:\n    ${urls}`;
}).join('\n');

const prompt = `Du er Cosmo Skyberg. Oppdater ${staleFiles.length} stale kunnskapsreferanser i ms-ai-architect pluginen.

Arbeidsmappe: ${PLUGIN_ROOT}

## Filer å oppdatere

${fileList}

## For HVER fil

1. Les filen med Read
2. Bruk microsoft_docs_fetch på de endrede kilde-URLene listet over
3. Bruk microsoft_docs_search for supplerende info
4. Oppdater filen med Edit:
   - Oppdater "Last updated" til ${new Date().toISOString().slice(0, 7)}
   - Oppdater utdaterte fakta, priser, datoer
   - Bevar eksisterende struktur og seksjoner
   - Marker oppdatert innhold med "Verified (MCP ${new Date().toISOString().slice(0, 7)})"

## Etter alle oppdateringer

1. Kjør: node scripts/kb-update/build-registry.mjs --merge
2. Kjør: node scripts/kb-update/report-changes.mjs
3. git add skills/ scripts/kb-update/data/
4. git commit -m "docs(architect): weekly KB update — ${staleFiles.length} files refreshed

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>"
5. git push origin main

## Regler
- Aldri slett filer, kun oppdater
- Bruk Edit, ikke Write
- Bevar all eksisterende struktur`;

try {
  execFileSync(CLAUDE_BIN, [
    '-p', prompt,
    '--model', 'sonnet',
    '--permission-mode', 'acceptEdits',
    '--allowedTools', 'Read,Edit,Bash,Glob,Grep,mcp__microsoft-learn__microsoft_docs_search,mcp__microsoft-learn__microsoft_docs_fetch',
    '--max-turns', '200',
  ], {
    stdio: 'inherit',
    timeout: 60 * 60 * 1000,
    cwd: PLUGIN_ROOT,
  });
  log('Claude session completed.');
} catch (err) {
  log(`Claude session error: ${err.message}`);
  process.exit(1);
}

log('=== Weekly KB Cron Done ===');