#!/usr/bin/env node
// run-weekly-update.mjs — Orchestrator for weekly KB update pipeline.
// Runs: poll → report → (optional) discover, sequentially.
// Usage: node run-weekly-update.mjs [--force] [--discover] [--dry-run]

import { dirname, join } from 'node:path';
import { fileURLToPath } from 'node:url';
import { execFileSync } from 'node:child_process';
import { loadRegistry } from './lib/registry-io.mjs';

const __dirname = dirname(fileURLToPath(import.meta.url));
const DATA_DIR = join(__dirname, 'data');

const force = process.argv.includes('--force');
const discover = process.argv.includes('--discover');
const dryRun = process.argv.includes('--dry-run');

const DAY_MS = 24 * 60 * 60 * 1000;

function run(script, args = []) {
  const fullPath = join(__dirname, script);
  console.log(`\n--- Running ${script} ${args.join(' ')} ---`);
  try {
    execFileSync('node', [fullPath, ...args], {
      stdio: 'inherit',
      timeout: 10 * 60 * 1000, // 10 min max per step
    });
  } catch (err) {
    console.error(`${script} failed: ${err.message}`);
    process.exit(1);
  }
}

// --- Main ---
const registry = loadRegistry(DATA_DIR);
const lastPoll = registry.last_poll ? new Date(registry.last_poll) : null;
const daysSince = lastPoll ? (Date.now() - lastPoll.getTime()) / DAY_MS : Infinity;

if (!force && daysSince < 7) {
  console.log(`Last poll: ${Math.floor(daysSince)} day(s) ago. Next in ${Math.ceil(7 - daysSince)} day(s).`);
  console.log('Use --force to run anyway.');
  process.exit(0);
}

if (dryRun) {
  console.log('DRY RUN — would execute:');
  console.log('  1. poll-sitemaps.mjs' + (force ? ' --force' : ''));
  console.log('  2. report-changes.mjs');
  if (discover) console.log('  3. discover-new-urls.mjs');
  process.exit(0);
}

// Ensure registry exists
if (Object.keys(registry.urls).length === 0) {
  console.log('Registry empty — building from reference files first...');
  run('build-registry.mjs');
}

// Step 1: Poll sitemaps
run('poll-sitemaps.mjs', force ? ['--force'] : []);

// Step 2: Generate change report
run('report-changes.mjs');

// Step 3: Optional discovery
if (discover) {
  run('discover-new-urls.mjs', ['--limit', '500']);
}

console.log('\n=== Weekly update complete ===');