'use strict';

/**
 * Dispatch a request to the server using whichever adapter
 * is supported by the current environment.
 *
 * @param {object} config The config that is to be used for the request
 * @returns {Promise} The Promise to be fulfilled
 */
module.exports = function dispatchRequest(config) {
  return new Promise(function executor(resolve, reject) {
    try {
      var adapter;

      if (typeof config.adapter === 'function') {
        // For custom adapter support
        adapter = config.adapter;
      } else if (typeof process !== 'undefined') {
        // For node use HTTP adapter
        adapter = require('../adapters/http');
      } else if (typeof XMLHttpRequest !== 'undefined') {
        // For browsers use XHR adapter
        adapter = require('../adapters/xhr');
      }

      if (typeof adapter === 'function') {
        adapter(resolve, reject, config);
      }
    } catch (e) {
      reject(e);
    }
  });
};