const fs = require('fs');
const path = require('path');
const root = path.resolve(__dirname, '..');

function walk(dir) {
  const res = [];
  const items = fs.readdirSync(dir, { withFileTypes: true });
  for (const it of items) {
    const full = path.join(dir, it.name);
    if (it.isDirectory()) {
      // skip virtual env and node_modules
      if (['.venv', 'node_modules', '.git'].includes(it.name)) continue;
      res.push(...walk(full));
    } else {
      res.push(full);
    }
  }
  return res;
}

function isImage(f) {
  return /\.(png|jpe?g|gif|svg|webp|ico)$/i.test(f);
}
function isTextFile(f) {
  return /\.(js|jsx|ts|tsx|json|html|htm|wxml|wxss|css|md|vue|py|java|xml|txt|scss|less|styl|mdx|yaml|yml)$/i.test(f);
}

const all = walk(root);
const images = all.filter(isImage);
const textFiles = all.filter(isTextFile);

const unused = [];
for (const img of images) {
  const name = path.basename(img);
  let found = false;
  for (const tf of textFiles) {
    try {
      const content = fs.readFileSync(tf, 'utf8');
      if (content.indexOf(name) !== -1) { found = true; break; }
    } catch (e) {
      // ignore
    }
  }
  if (!found) unused.push(img);
}

console.log(JSON.stringify({ images: images, unused: unused }, null, 2));