"use strict";

exports.handler = (event, context, callback) => {
  // Extract the request from the Cloudfront event that is sent to Lambda@Edge
  var request = event.Records[0].cf.request;

  // Extract the URI from the request
  var oldURI = request.uri;

  // Match any '/' that occurs at the end of a URI. Replace it with a default index
  function replace_uri(uri) {
    uri = uri.replace(/\/$/, "/index.html");
    // uri = uri.replace(/\.io\/search\?q\=(.*)/, ".io/search/index.html?q=$1");
    // console.log(uri)
    return uri;
  }
  // var newURI = oldURI.replace(/\/$/, "/index.html");
  var newURI = replace_uri(oldURI);

  // Log the URI as received by Cloudfront and the new URI to be used to fetch from the origin
  console.log(`Old URI: ${oldURI}`);
  console.log(`New URI: ${newURI}`);

  // Replace the received URI with the URI that includes the index page
  request.uri = newURI;

  // Return to Cloudfront
  return callback(null, request);
};