"use strict";

var _CoreManager = _interopRequireDefault(require("./CoreManager"));
var _ParseError = _interopRequireDefault(require("./ParseError"));
var _promiseUtils = require("./promiseUtils");
function _interopRequireDefault(obj) {
  return obj && obj.__esModule ? obj : {
    default: obj
  };
}
/**
 * @flow
 */
/* global XMLHttpRequest, XDomainRequest */
const uuidv4 = require('./uuid');
/*:: export type RequestOptions = {
  useMasterKey?: boolean,
  sessionToken?: string,
  installationId?: string,
  returnStatus?: boolean,
  batchSize?: number,
  include?: any,
  progress?: any,
  context?: any,
  usePost?: boolean,
};*/
/*:: export type FullOptions = {
  success?: any,
  error?: any,
  useMasterKey?: boolean,
  sessionToken?: string,
  installationId?: string,
  progress?: any,
  usePost?: boolean,
};*/
let XHR = null;
if (typeof XMLHttpRequest !== 'undefined') {
  XHR = XMLHttpRequest;
}
XHR = require('xmlhttprequest').XMLHttpRequest;
let useXDomainRequest = false;
if (typeof XDomainRequest !== 'undefined' && !('withCredentials' in new XMLHttpRequest())) {
  useXDomainRequest = true;
}
function ajaxIE9(method /*: string*/, url /*: string*/, data /*: any*/, headers /*:: ?: any*/, options /*:: ?: FullOptions*/) {
  return new Promise((resolve, reject) => {
    const xdr = new XDomainRequest();
    xdr.onload = function () {
      let response;
      try {
        response = JSON.parse(xdr.responseText);
      } catch (e) {
        reject(e);
      }
      if (response) {
        resolve({
          response
        });
      }
    };
    xdr.onerror = xdr.ontimeout = function () {
      // Let's fake a real error message.
      const fakeResponse = {
        responseText: JSON.stringify({
          code: _ParseError.default.X_DOMAIN_REQUEST,
          error: "IE's XDomainRequest does not supply error info."
        })
      };
      reject(fakeResponse);
    };
    xdr.onprogress = function () {
      if (options && typeof options.progress === 'function') {
        options.progress(xdr.responseText);
      }
    };
    xdr.open(method, url);
    xdr.send(data);
    if (options && typeof options.requestTask === 'function') {
      options.requestTask(xdr);
    }
  });
}
const RESTController = {
  ajax(method /*: string*/, url /*: string*/, data /*: any*/, headers /*:: ?: any*/, options /*:: ?: FullOptions*/) {
    if (useXDomainRequest) {
      return ajaxIE9(method, url, data, headers, options);
    }
    const promise = (0, _promiseUtils.resolvingPromise)();
    const isIdempotent = _CoreManager.default.get('IDEMPOTENCY') && ['POST', 'PUT'].includes(method);
    const requestId = isIdempotent ? uuidv4() : '';
    let attempts = 0;
    const dispatch = function () {
      if (XHR == null) {
        throw new Error('Cannot make a request: No definition of XMLHttpRequest was found.');
      }
      let handled = false;
      const xhr = new XHR();
      xhr.onreadystatechange = function () {
        if (xhr.readyState !== 4 || handled || xhr._aborted) {
          return;
        }
        handled = true;
        if (xhr.status >= 200 && xhr.status < 300) {
          let response;
          try {
            response = JSON.parse(xhr.responseText);
            if (typeof xhr.getResponseHeader === 'function') {
              if ((xhr.getAllResponseHeaders() || '').includes('x-parse-job-status-id: ')) {
                response = xhr.getResponseHeader('x-parse-job-status-id');
              }
              if ((xhr.getAllResponseHeaders() || '').includes('x-parse-push-status-id: ')) {
                response = xhr.getResponseHeader('x-parse-push-status-id');
              }
            }
          } catch (e) {
            promise.reject(e.toString());
          }
          if (response) {
            promise.resolve({
              response,
              status: xhr.status,
              xhr
            });
          }
        } else if (xhr.status >= 500 || xhr.status === 0) {
          // retry on 5XX or node-xmlhttprequest error
          if (++attempts < _CoreManager.default.get('REQUEST_ATTEMPT_LIMIT')) {
            // Exponentially-growing random delay
            const delay = Math.round(Math.random() * 125 * Math.pow(2, attempts));
            setTimeout(dispatch, delay);
          } else if (xhr.status === 0) {
            promise.reject('Unable to connect to the Parse API');
          } else {
            // After the retry limit is reached, fail
            promise.reject(xhr);
          }
        } else {
          promise.reject(xhr);
        }
      };
      headers = headers || {};
      if (typeof headers['Content-Type'] !== 'string') {
        headers['Content-Type'] = 'text/plain'; // Avoid pre-flight
      }

      if (_CoreManager.default.get('IS_NODE')) {
        headers['User-Agent'] = 'Parse/' + _CoreManager.default.get('VERSION') + ' (NodeJS ' + process.versions.node + ')';
      }
      if (isIdempotent) {
        headers['X-Parse-Request-Id'] = requestId;
      }
      if (_CoreManager.default.get('SERVER_AUTH_TYPE') && _CoreManager.default.get('SERVER_AUTH_TOKEN')) {
        headers['Authorization'] = _CoreManager.default.get('SERVER_AUTH_TYPE') + ' ' + _CoreManager.default.get('SERVER_AUTH_TOKEN');
      }
      const customHeaders = _CoreManager.default.get('REQUEST_HEADERS');
      for (const key in customHeaders) {
        headers[key] = customHeaders[key];
      }
      if (options && typeof options.progress === 'function') {
        const handleProgress = function (type, event) {
          if (event.lengthComputable) {
            options.progress(event.loaded / event.total, event.loaded, event.total, {
              type
            });
          } else {
            options.progress(null, null, null, {
              type
            });
          }
        };
        xhr.onprogress = event => {
          handleProgress('download', event);
        };
        if (xhr.upload) {
          xhr.upload.onprogress = event => {
            handleProgress('upload', event);
          };
        }
      }
      xhr.open(method, url, true);
      for (const h in headers) {
        xhr.setRequestHeader(h, headers[h]);
      }
      xhr.onabort = function () {
        promise.resolve({
          response: {
            results: []
          },
          status: 0,
          xhr
        });
      };
      xhr.send(data);
      if (options && typeof options.requestTask === 'function') {
        options.requestTask(xhr);
      }
    };
    dispatch();
    return promise;
  },
  request(method /*: string*/, path /*: string*/, data /*: mixed*/, options /*:: ?: RequestOptions*/) {
    options = options || {};
    let url = _CoreManager.default.get('SERVER_URL');
    if (url[url.length - 1] !== '/') {
      url += '/';
    }
    url += path;
    const payload = {};
    if (data && typeof data === 'object') {
      for (const k in data) {
        payload[k] = data[k];
      }
    }

    // Add context
    const context = options.context;
    if (context !== undefined) {
      payload._context = context;
    }
    if (method !== 'POST') {
      payload._method = method;
      method = 'POST';
    }
    payload._ApplicationId = _CoreManager.default.get('APPLICATION_ID');
    const jsKey = _CoreManager.default.get('JAVASCRIPT_KEY');
    if (jsKey) {
      payload._JavaScriptKey = jsKey;
    }
    payload._ClientVersion = _CoreManager.default.get('VERSION');
    let useMasterKey = options.useMasterKey;
    if (typeof useMasterKey === 'undefined') {
      useMasterKey = _CoreManager.default.get('USE_MASTER_KEY');
    }
    if (useMasterKey) {
      if (_CoreManager.default.get('MASTER_KEY')) {
        delete payload._JavaScriptKey;
        payload._MasterKey = _CoreManager.default.get('MASTER_KEY');
      } else {
        throw new Error('Cannot use the Master Key, it has not been provided.');
      }
    }
    if (_CoreManager.default.get('FORCE_REVOCABLE_SESSION')) {
      payload._RevocableSession = '1';
    }
    const installationId = options.installationId;
    let installationIdPromise;
    if (installationId && typeof installationId === 'string') {
      installationIdPromise = Promise.resolve(installationId);
    } else {
      const installationController = _CoreManager.default.getInstallationController();
      installationIdPromise = installationController.currentInstallationId();
    }
    return installationIdPromise.then(iid => {
      payload._InstallationId = iid;
      const userController = _CoreManager.default.getUserController();
      if (options && typeof options.sessionToken === 'string') {
        return Promise.resolve(options.sessionToken);
      } else if (userController) {
        return userController.currentUserAsync().then(user => {
          if (user) {
            return Promise.resolve(user.getSessionToken());
          }
          return Promise.resolve(null);
        });
      }
      return Promise.resolve(null);
    }).then(token => {
      if (token) {
        payload._SessionToken = token;
      }
      const payloadString = JSON.stringify(payload);
      return RESTController.ajax(method, url, payloadString, {}, options).then(({
        response,
        status
      }) => {
        if (options.returnStatus) {
          return {
            ...response,
            _status: status
          };
        } else {
          return response;
        }
      });
    }).catch(RESTController.handleError);
  },
  handleError(response) {
    // Transform the error into an instance of ParseError by trying to parse
    // the error string as JSON
    let error;
    if (response && response.responseText) {
      try {
        const errorJSON = JSON.parse(response.responseText);
        error = new _ParseError.default(errorJSON.code, errorJSON.error);
      } catch (e) {
        // If we fail to parse the error text, that's okay.
        error = new _ParseError.default(_ParseError.default.INVALID_JSON, 'Received an error with invalid JSON from Parse: ' + response.responseText);
      }
    } else {
      const message = response.message ? response.message : response;
      error = new _ParseError.default(_ParseError.default.CONNECTION_FAILED, 'XMLHttpRequest failed: ' + JSON.stringify(message));
    }
    return Promise.reject(error);
  },
  _setXHR(xhr /*: any*/) {
    XHR = xhr;
  },
  _getXHR() {
    return XHR;
  }
};
module.exports = RESTController;