// api_v1/scanner/scanActivityFiles.js
const fsp = require('fs/promises');
const path = require('path');

const SUPPORTED_ACTIVITY_EXTS = new Set(['.fit', '.gpx', '.tcx']);

async function* scanActivityFiles(user, cartella, absCartella, db) {
  let entries = [];
  try {
    entries = await fsp.readdir(absCartella, { withFileTypes: true });
  } catch {
    return;
  }

  for (const e of entries) {
    if (!e.isFile()) continue;

    const ext = path.extname(e.name).toLowerCase();
    if (!SUPPORTED_ACTIVITY_EXTS.has(ext)) continue;

    const absPath = path.join(absCartella, e.name);

    // 🔥 MANCAVA QUESTO
    let st;
    try {
      st = await fsp.stat(absPath);
    } catch {
      continue;
    }

    yield {
      id: `${cartella}/${e.name}`,
      file_name: e.name,
      relPath: e.name,          // 🔥 serve per processActivityFile
      absPath,
      ext,
      stat: st,
      path: `/activities/${user}/original/${cartella}/${e.name}` // 🔥 come le foto
    };
  }
}

module.exports = scanActivityFiles;