// Rewrite `mdi:NAME` -> `lucide:MAPPED` across frontend src + CMS content.
// KEEP_MDI names are left untouched (brand/language logos with no lucide pendant).
import { MAP, KEEP_MDI } from './icon-map.mjs';
import fs from 'node:fs';
import path from 'node:path';
import { fileURLToPath } from 'node:url';

const ROOT = path.resolve(path.dirname(fileURLToPath(import.meta.url)), '..');
const WEB_ROOT = path.resolve(ROOT, '..');

const TARGETS = [
  { dir: path.join(ROOT, 'src'), exts: /\.(svelte|ts|tsx|js|mjs)$/ },
  { dir: path.join(WEB_ROOT, 'cms_content', 'windwiderstand'), exts: /\.json5$/ },
];
const SKIP_DIR = /(node_modules|\.history|\.search|_legacy|\.svelte-kit)/;

const stats = { files: 0, repl: 0, kept: {} };

function walk(dir, exts, acc) {
  for (const e of fs.readdirSync(dir, { withFileTypes: true })) {
    if (e.name.startsWith('.') && e.name !== '.') continue;
    const full = path.join(dir, e.name);
    if (SKIP_DIR.test(full)) continue;
    if (e.isDirectory()) walk(full, exts, acc);
    else if (exts.test(e.name)) acc.push(full);
  }
  return acc;
}

const RE = /mdi:([a-z0-9-]+)/g;
for (const { dir, exts } of TARGETS) {
  if (!fs.existsSync(dir)) continue;
  for (const file of walk(dir, exts, [])) {
    const src = fs.readFileSync(file, 'utf8');
    let n = 0;
    const out = src.replace(RE, (m, name) => {
      if (KEEP_MDI.has(name)) {
        stats.kept[name] = (stats.kept[name] || 0) + 1;
        return m;
      }
      const l = MAP[name];
      if (!l) return m; // unknown -> leave, validator should have caught
      n++;
      return `lucide:${l}`;
    });
    if (n > 0) {
      fs.writeFileSync(file, out);
      stats.files++;
      stats.repl += n;
    }
  }
}

console.log(`rewrote ${stats.repl} refs in ${stats.files} files`);
console.log('kept on mdi:', JSON.stringify(stats.kept));