#!/usr/bin/env node
/**
 * Sweep worker. Runs runSweep on a tick — trash hard-delete, asset
 * orphans, audit log rotation, marketing preview queue drain.
 *
 * Usage:
 *   node scripts/sweep-worker.mjs               # one-shot
 *   node scripts/sweep-worker.mjs --loop        # run on interval
 *
 * Production: run as a separate process (PM2, systemd, etc.) so the
 * main API server doesn't lose responsiveness when sweep does heavy
 * work (especially preview rendering, which can take seconds per
 * template at scale).
 *
 * For v1 the sweep interval is 60 minutes when run with --loop.
 * Adjust via the --interval=<minutes> flag.
 */

import { fileURLToPath } from 'node:url';
import { dirname, join } from 'node:path';

import {
  runSweep,
  marketingPreviewRenderer,
  createTemplateIndex,
} from 'template-manager/server';
import { PRODUCT_TYPES } from '../src/constants/products.js';

const __filename = fileURLToPath(import.meta.url);
const __dirname = dirname(__filename);
const STORAGE_PATH = join(__dirname, '..', 'templates');

const args = process.argv.slice(2);
const LOOP = args.includes('--loop');
const intervalArg = args.find((a) => a.startsWith('--interval='));
const INTERVAL_MIN = intervalArg ? parseInt(intervalArg.split('=')[1], 10) : 60;

async function buildRenderer() {
  try {
    const { renderDesignComposite } = await import('goods-editor/server');
    const canvasMod = await import('canvas');
    const sharpMod = await import('sharp').catch(() => null);

    const factory = marketingPreviewRenderer({
      editorRenderer: async (args) => renderDesignComposite({
        ...args,
        canvas: canvasMod.default || canvasMod,
        sharp: sharpMod ? (sharpMod.default || sharpMod) : null,
        mockupsDir: join(__dirname, '..', 'mockups'),
        uploadsDir: join(__dirname, '..', 'uploads'),
        stickersDir: join(__dirname, '..', 'public', 'stickers'),
        storageDir: STORAGE_PATH,
      }),
    });

    // The factory returns a renderer expecting context. We don't have
    // the in-memory marketingPreviewQueue here — that lives in the
    // running API server's process. The worker reconciles via the
    // metadata.autoStaleSince field: any template with that field
    // set is a regen candidate.
    return async (templateId) => {
      // Skip if no audit log handle in this script — that's mounted
      // server-side. The renderer logs failures via the audit log
      // when one is provided; without one, errors silently retry on
      // the next sweep.
      const { createAuditLog } = await import('template-manager/server/lib/auditLog.js').catch(() => ({}));
      const auditLog = createAuditLog ? createAuditLog(STORAGE_PATH) : null;
      return factory({
        templateId,
        storagePath: STORAGE_PATH,
        variantCatalog: PRODUCT_TYPES,
        auditLog,
      });
    };
  } catch (err) {
    console.warn('⚠ Renderer not available; sweep will skip preview regen:', err.message);
    return null;
  }
}

async function runOnce(renderPreview) {
  const templateIndex = createTemplateIndex(STORAGE_PATH);
  const summary = await runSweep({
    storagePath: STORAGE_PATH,
    templateIndex,
    renderPreview,
    // marketingPreviewQueue is intentionally absent — the in-process
    // queue lives in the API server. Worker process reconciles via
    // metadata.autoStaleSince instead.
    marketingPreviewQueue: null,
  });
  console.log('Sweep:', JSON.stringify(summary, null, 2));
}

async function main() {
  const renderPreview = await buildRenderer();
  if (!LOOP) {
    await runOnce(renderPreview);
    process.exit(0);
  }
  console.log(`▶ Sweep worker loop (interval: ${INTERVAL_MIN} min)`);
  const tick = async () => {
    try { await runOnce(renderPreview); }
    catch (err) { console.error('Sweep tick failed:', err); }
  };
  await tick();
  setInterval(tick, INTERVAL_MIN * 60 * 1000);
}

main().catch((err) => {
  console.error('Sweep worker failed:', err);
  process.exit(1);
});