const os = require('os');
const path = require('path');
const fs = require('fs');

const { ipcRenderer } = require('electron');

exports.check_file_cache = async function () {
  console.log('Checking the local file cache against the remote server.');
  tbl_event_file.iterate(function(file_value, key, iteration) {
    //if (file_value.event_location_id == event_location_id) {
      //console.log('f: ('+file_value.event_file_id+') '+file_value.event_file_filename+' ***')
      
      file_id = file_value.id; // NOTE: This is the event_file.id or event_file_id.
      let filename = file_value.hosted_file_hash_sha256+'.file';
      
      save_path = path.join(host_file_cache_path, filename);
      
      if (fs.existsSync(save_path)) {
        //console.log('Local file already exists: '+save_path);
      } else {
        console.log('File not found locally. Downloading file: '+save_path);
        let api_endpoint = '/event/file/'+file_id+'/download';
        ipcRenderer.send('download_file', api_base_url, api_endpoint, api_temporary_token, save_path); // Must download file using main node.js thread.
      }
    //}
  });
  
  return true;
}