// for CMD
declare var require: any;
declare var module: any;

declare var Promise: any;

var DEFAULT_RULES = [
  function(xhr, resolve, reject) {
    if (!/^[1-3]/.test(xhr.status)) {
      reject('HTTP Response code: ' + xhr.status);
    } else {
      resolve(xhr.responseText);
    }
  }
];

function simpleDecorator(xhr, rule, deferred) {
  var result = {
    error: false,
    msg: undefined
  };

  rule(xhr, deferred.resolve, deferred.reject);

  return deferred;
}

class Ajax {
  ajax: any;
  deferred: any;

  constructor($service: any) {
    var self = this;
    var xhr = new XMLHttpRequest();
    var promise  = new Promise(function(resolve, reject) {
      xhr.onload = function() {
        $service.rules.every(function(filter, index) {
          var result = simpleDecorator(xhr, filter, { resolve: resolve, reject: reject });
          if (result.error) {
            reject(result.msg);
            return false;
          } else {
            if (index === $service.rules.length - 1) resolve(xhr.responseText);
            return true;
          }
        });
      };
    });

    this.ajax = xhr;
    this.deferred = promise;
  }
}

export = Ajax;