var express = require("express");
var router = express.Router();
var util = require("util");

var utils = require("../../../src/utils");
var crossCtl = require("../../../src/crossCtl");

var path = require("path");

const fs = require("fs");

// operation

const FileType = require("file-type");

router.use(function (req, res, next) {
  // console.log("huk ck!!!, req.headers.referer=", req.headers.referer);
  // console.log("huk ck!!!, req.headers=", req.headers);
  // console.log("huk ck!!!, req.url=", req.url);

  var passcard =
    req.headers["user-agent"] != undefined ? req.headers["user-agent"] : "";

  if (
    req.isAuthenticated() ||
    (passcard.startsWith("Dart/") && passcard.endsWith(" (dart:io)")) ||
    passcard == "usm"
  ) {
    var ckRootPath = crossCtl.sConfig.contentKeeperPath
      ? path.join(crossCtl.sConfig.contentKeeperPath, req.url)
      : path.join(
          __dirname,
          "../../../",
          "modules",
          crossCtl.sConfig.type,
          "contents",
          req.url
        );

    var targetPath = ckRootPath;

    // console.log("in ck, targetPath=", targetPath);
    let mimeType = utils.getMimeFromPath(targetPath);
    // console.log("in ck, mimeType=", mimeType);

    fs.access(targetPath, fs.constants.F_OK, function (error) {
      if (error) {
        next();
      } else {
        req.workTag.res().status(200).type(mimeType).sendFile(targetPath);
      }
    });
  } else {
    req.workTag.res().status(401).send("401 Unauthorized");
  }
});

module.exports = router;