import fs from 'node:fs';
import path from 'node:path';
import { fileURLToPath } from 'node:url';

const HERE = path.dirname(fileURLToPath(import.meta.url));

export function reviewHtmlPath(fallback) {
  const env = process.env.STAFF_UI_HTML;
  const shared = path.join(HERE, '..', 'public', 'review.html');
  const sibling = path.join(HERE, '..', '..', 'verae-staff-ui', 'public', 'review.html');
  for (const p of [env, shared, sibling, fallback]) {
    if (p && fs.existsSync(p)) return p;
  }
  return fallback;
}

export function loadReviewHtml(opts, fallback) {
  const file = reviewHtmlPath(fallback);
  let html = fs.readFileSync(file, 'utf8');
  const map = {
    '{{TITLE}}': opts.title || 'Staff review',
    '{{KICKER}}': opts.kicker || 'staff',
    '{{LEDE}}': opts.lede || 'Review prepaid balance, credits, usage, and payments in dollars.',
  };
  for (const [k, v] of Object.entries(map)) html = html.split(k).join(v);
  return html;
}