/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

jQuery(document).ready(function() {
  var dswid = location.search.replace(/.*dswid=(\-?[0-9]+).*/, "$1");
  if (dswid) {
    dswh.init(dswid, 'LAZY', 10, {
      'tokenizedRedirect': false,
      'storeWindowTreeOnLinkClick': true,
      'storeWindowTreeOnButtonClick': false
    });
  }
});

// taken from deltaspike 1.8.1

window.dswh = window.dswh || {

      DEBUG_MODE : false,
      TEMP_WINDOW_NAME : 'tempWindowId',
      MANAGED_WINDOW_NAME_PREFIX : 'ds-',

      initialized: false,
      windowId : null,
      clientWindowRenderMode : null,
      maxWindowIdLength : 10,
      cfg : null,

      init : function(windowId, clientWindowRenderMode, maxWindowIdLength, cfg) {

        if (dswh.initialized === true) {
            return;
        }
        dswh.initialized = true;

        dswh.utils.log('------- DeltaSpike windowhandler.js -------');
        dswh.utils.log('--- #init(\'' + windowId + '\', \'' + clientWindowRenderMode + '\',' + maxWindowIdLength + ',' + dswh.utils.stringify(cfg) + ')');
        dswh.utils.log('window.name: ' + window.name);

        this.windowId = windowId;
        this.clientWindowRenderMode = clientWindowRenderMode;
        this.maxWindowIdLength = maxWindowIdLength;
        if (cfg) {
          this.cfg = cfg;
        } else {
          this.cfg = {};
        }

        var targetStrategy = this.strategy[clientWindowRenderMode];
        if (targetStrategy) {
          dswh.utils.log('--- #validate');

          targetStrategy.validate();

          // early init
          // this is required if e.g. the onload attr is defined on the body tag and our onload handler won't be called
          // ATTENTION: the ds:windowId component must be placed as last body tag
          dswh.utils.log('--- #init(false)');
          targetStrategy.init(false);

          // JSF ajax callback
          jsf.ajax.addOnEvent(function(event) {
            if (event.status === "success") {
              dswh.utils.log('--- #init(true)');
              targetStrategy.init(true);
            }
          });

          // PF ajax callback
          if (window.$ && window.PrimeFaces) {
            $(document).on('pfAjaxComplete', function () {
              dswh.utils.log('--- #init(true)');
              targetStrategy.init(true);
            });
          }

          // init via onload
          // just as fallback if ds:windowId is not placed at last body tag
          var oldWindowOnLoad = window.onload;
          window.onload = function(evt) {
            try {
              (oldWindowOnLoad) ? oldWindowOnLoad(evt) : null;
            } finally {
              dswh.utils.log('--- #init(false)');
              targetStrategy.init(false);
            }
          };
        }
      },

      strategy : {

        'CLIENTWINDOW' : {

          validate : function() {
            this.cleanupCookies();
            this.assertWindowId();
          },

          init : function(ajax) {
            this.overwriteLinkOnClickEvents();
            this.overwriteButtonOnClickEvents();

            dswh.utils.appendHiddenWindowIdToForms();
          },

          assertWindowId : function() {
            dswh.utils.log('--- #assertWindowId');

            // ensure that windowIds get checked even if no windowhandler.html is used
            if (!dswh.utils.isWindowNameDefined() || !dswh.utils.isManagedWindowName()) {
              dswh.utils.log('window name not defined or unmanaged - request new windowId');
              dswh.utils.requestNewWindowId();
            }
          },

          overwriteLinkOnClickEvents : function() {

            var tokenizedRedirectEnabled = dswh.cfg.tokenizedRedirect;
            var storeWindowTreeEnabled = dswh.utils.isHtml5() && dswh.cfg.storeWindowTreeOnLinkClick;

            dswh.utils.log('--- #overwriteLinkOnClickEvents');
            dswh.utils.log('tokenizedRedirect: ' + dswh.cfg.tokenizedRedirect);
            dswh.utils.log('storeWindowTreeOnLinkClick: ' + dswh.cfg.storeWindowTreeOnLinkClick);

            if (tokenizedRedirectEnabled || storeWindowTreeEnabled) {
              var links = document.getElementsByTagName("a");
              for (var i = 0; i < links.length; i++) {
                var link = links[i];

                var target = link.getAttribute('target');

                if (dswh.strategy.CLIENTWINDOW.isHrefDefined(link) === true && (!target || target === '_self')) {
                  if (!link.onclick) {
                    link.onclick = function(evt) {
                      // IE handling added
                      evt = evt || window.event;

                      // skip open in new tab
                      if (!evt.ctrlKey) {
                        if (storeWindowTreeEnabled) {
                          dswh.strategy.CLIENTWINDOW.storeWindowTree();
                        }
                        if (tokenizedRedirectEnabled) {
                          dswh.strategy.CLIENTWINDOW.tokenizedRedirect(this);
                          return false;
                        }

                        return true;
                      }
                    };
                  } else {
                    // prevent double decoration
                    if (!("" + link.onclick).match(".*storeWindowTree().*")) {
                      //the function wrapper is important otherwise the
                      //last onclick handler would be assigned to oldonclick
                      (function storeEvent() {
                        var oldonclick = link.onclick;
                        link.onclick = function(evt) {
                          // IE handling added
                          evt = evt || window.event;

                          var proceed = oldonclick.bind(this)(evt);
                          if (typeof proceed === 'undefined' || proceed === true) {

                            // skip open in new tab
                            if (!evt.ctrlKey) {
                              if (storeWindowTreeEnabled) {
                                dswh.strategy.CLIENTWINDOW.storeWindowTree();
                              }

                              if (tokenizedRedirectEnabled) {
                                dswh.strategy.CLIENTWINDOW.tokenizedRedirect(this);
                                return false;
                              }
                            }
                          }
                          return proceed;
                        };
                      })();
                    }
                  }
                }
              }
            }
          },

          overwriteButtonOnClickEvents : function() {

            var storeWindowTreeEnabled = dswh.utils.isHtml5() && dswh.cfg.storeWindowTreeOnButtonClick;

            dswh.utils.log('--- #overwriteButtonOnClickEvents');
            dswh.utils.log('storeWindowTreeOnButtonClick: ' + dswh.cfg.storeWindowTreeOnButtonClick);

            if (storeWindowTreeEnabled) {
              var inputs = document.getElementsByTagName("input");
              for (var i = 0; i < inputs.length; i++) {
                var input = inputs[i];
                if (input.getAttribute("type") === "submit" || input.getAttribute("type") === "button") {
                  if (!input.onclick) {
                    input.onclick = function() {
                      dswh.strategy.CLIENTWINDOW.storeWindowTree();
                      return true;
                    };
                  } else {
                    // prevent double decoration
                    if (!("" + input.onclick).match(".*storeWindowTree().*")) {
                      //the function wrapper is important otherwise the
                      //last onclick handler would be assigned to oldonclick
                      (function storeEvent() {
                        var oldonclick = input.onclick;
                        input.onclick = function(evt) {
                          //ie handling added
                          evt = evt || window.event;

                          dswh.strategy.CLIENTWINDOW.storeWindowTree();

                          return oldonclick.bind(this)(evt);
                        };
                      })();
                    }
                  }
                }
              }
            }
          },

          isHrefDefined : function(link) {

            var href = link.getAttribute("href");

            if (!href || href === null) {
              return false;
            }

            // trim
            href = href.replace(/^\s+|\s+$/g, '');

            if (href === '') {
              return false;
            }

            if (href === '#') {
              return false;
            }

            if (href.lastIndexOf('javascript:', 0) === 0) {
              return false;
            }

            return true;
          },

          tokenizedRedirect : function(link) {

            dswh.utils.log('--- #tokenizedRedirect');

            var requestToken = dswh.utils.generateNewRequestToken();
            dswh.utils.storeCookie('dsrwid-' + requestToken, dswh.windowId, 3);
            window.location = dswh.utils.setUrlParam(link.href, 'dsrid', requestToken);
          },

          /**
           * store the current body in the html5 localstorage
           */
          storeWindowTree : function() {

            dswh.utils.log('--- #storeWindowTree');

            // first we store all CSS we also need on the intermediate page
            var headNodes = document.getElementsByTagName("head")[0].childNodes;
            var oldSS = new Array();
            var j = 0;
            for (var i = 0; i < headNodes.length; i++) {
              var tagName = headNodes[i].tagName;
              if (tagName
                  && dswh.utils.equalsIgnoreCase(tagName, "link")
                  && dswh.utils.equalsIgnoreCase(headNodes[i].getAttribute("type"), "text/css")) {

                // sort out media="print" and stuff
                var media = headNodes[i].getAttribute("media");
                if (!media
                    || dswh.utils.equalsIgnoreCase(media, "all")
                    || dswh.utils.equalsIgnoreCase(media, 'screen')) {
                  oldSS[j++] = headNodes[i].getAttribute("href");
                }
              }
            }
            localStorage.setItem(window.name + '_css', dswh.utils.stringify(oldSS));

            var body = document.getElementsByTagName("body")[0];
            localStorage.setItem(window.name + '_body', body.innerHTML);

            var attributes = {};
            for (var i = 0; i < body.attributes.length; i++) {
              var attribute = body.attributes[i];
              attributes[attribute.name] = attribute.value;
            }
            localStorage.setItem(window.name + '_bodyAttributes', dswh.utils.stringify(attributes));

            var scrollTop = (window.pageYOffset || document.documentElement.scrollTop) - (document.documentElement.clientTop || 0);
            localStorage.setItem(window.name + '_scrollTop', scrollTop);

            var scrollLeft = (window.pageXOffset || document.documentElement.scrollLeft) - (document.documentElement.clientLeft || 0);
            localStorage.setItem(window.name + '_scrollLeft', scrollLeft);
          },

          cleanupCookies : function() {
            dswh.utils.log('--- #cleanupCookies');

            var dsrid = dswh.utils.getUrlParameter(window.location.href, 'dsrid');
            if (dsrid) {
              dswh.utils.expireCookie('dsrwid-' + dsrid);
            }
          }
        },

        'LAZY' : {

          validate : function() {
            this.cleanupCookies();
            this.assertWindowId();
          },

          init : function(ajax) {
            dswh.utils.appendHiddenWindowIdToForms();
          },

          assertWindowId : function() {
            var dswid = dswh.utils.getUrlParameter(window.location.href, 'dswid');

            dswh.utils.log('--- #assertWindowId');
            dswh.utils.log('dswid: ' + dswid);

            // window name is defined -> existing tab
            if (dswh.utils.isWindowNameDefined()) {

              // is the current window name a already managed by DS?
              if (dswh.utils.isManagedWindowName()) {

                var windowId = dswh.utils.getWindowIdFromWindowName();

                // we triggered the windowId recreation last request
                if (windowId === dswh.TEMP_WINDOW_NAME) {
                  // enabled initial redirect
                  // -> use the new windowId from the url
                  if (dswid) {
                    dswh.utils.log('assign window name from request parameter');

                    dswh.utils.setWindowIdAsWindowName(dswid);
                  }
                  // disabled initial redirect
                  // -> use the new windowId from the rendered config as no url param is available
                  else {
                    dswh.utils.log('assign window name from server windowId');

                    dswh.utils.setWindowIdAsWindowName(dswh.windowId);
                  }
                }
                // security check like on the server side
                else if (windowId.length > dswh.maxWindowIdLength) {
                  dswh.utils.log('window id from window name exeeds maxWindowIdLength - request new windowId');

                  dswh.utils.requestNewWindowId();
                }
                // window name doesn't match requested windowId
                // -> redirect to the same view with current windowId from the window name
                else if (windowId !== dswid) {
                  dswh.utils.log('reload url with window name');

                  window.location = dswh.utils.setUrlParam(window.location.href, 'dswid', windowId);
                }
              }
              else {
                dswh.utils.log('window name is unmanaged - request new windowId');

                dswh.utils.requestNewWindowId();
              }
            }
            // window name is undefined -> "open in new tab/window" was used
            else {
              // url param available?
              if (dswid) {
                // initial redirect
                // -> the windowId is valid - we don't need to a second request
                if (dswh.cfg.initialRedirectWindowId && dswid === dswh.cfg.initialRedirectWindowId) {
                  dswh.utils.log('assign window name from initialRedirectWindowId');

                  dswh.utils.setWindowIdAsWindowName(dswh.cfg.initialRedirectWindowId);
                }
                // != initial redirect
                // -> request a new windowId to avoid multiple tabs with the same windowId
                else {
                  dswh.utils.log('request new windowId');

                  dswh.utils.requestNewWindowId();
                }
              }
              // as no url parameter is available, the request is a new tab with disabled initial redirect
              // -> just use the windowId from the renderer
              else if (dswh.windowId) {
                dswh.utils.log('assign window name from server windowId');

                dswh.utils.setWindowIdAsWindowName(dswh.windowId);
              }
            }
          },

          cleanupCookies : function() {
            dswh.utils.log('--- #cleanupCookies');

            var dswid = dswh.utils.getUrlParameter(window.location.href, 'dswid');
            if (dswid) {
              dswh.utils.expireCookie('dsrwid-' + dswid);
            }
          }
        }
      },

      utils : {

        isWindowNameDefined : function() {
          return window.name && window.name.length > 0;
        },

        isManagedWindowName : function() {
          if (!window.name) {
            return false;
          }

          return window.name.indexOf(dswh.MANAGED_WINDOW_NAME_PREFIX) === 0;
        },

        getWindowIdFromWindowName : function() {
          return window.name.substring(dswh.MANAGED_WINDOW_NAME_PREFIX.length);
        },

        setWindowIdAsWindowName : function(windowId) {
          window.name = dswh.MANAGED_WINDOW_NAME_PREFIX + windowId;
        },

        requestNewWindowId : function() {
          // set temp window name to remember the current state
          dswh.utils.setWindowIdAsWindowName(dswh.TEMP_WINDOW_NAME);

          // we remove the dswid if available and redirect to the same url again to create a new windowId
          window.location = dswh.utils.setUrlParam(window.location.href, 'dswid', null);

          // set temp window name to remember the current state (again - sometimes required for IE!?)
          setTimeout("dswh.utils.setWindowIdAsWindowName(dswh.TEMP_WINDOW_NAME);", 1);
        },

        isHtml5 : function() {
          try {
            return !!localStorage.getItem;
          } catch(e) {
            return false;
          }
        },

        stringify : function(someArray) {
          // some browsers don't understand JSON - guess which one ... :(
          if (JSON) {
            return JSON.stringify(someArray);
          }
          return someArray.join("|||");
        },

        unstringify : function(serialized) {
          if (JSON) {
            return JSON.parse(serialized);
          }

          return serialized.split("|||");
        },

        equalsIgnoreCase : function(source, destination) {
          //either both are not set or null
          if (!source && !destination) {
            return true;
          }
          //source or dest is set while the other is not
          if (!source || !destination) return false;

          //in any other case we do a strong string comparison
          return source.toLowerCase() === destination.toLowerCase();
        },

        getUrlParameter : function(uri, name) {
          // create an anchor object with the uri and let the browser parse it
          var a = document.createElement('a');
          a.href = uri;

          // check if a query string is available
          var queryString = a.search;
          if (queryString && queryString.length > 0) {
            // create an array of query parameters - substring(1) removes the ? at the beginning of the query
            var queryParameters = queryString.substring(1).split("&");
            for (var i = 0; i < queryParameters.length; i++) {
              var queryParameter = queryParameters[i].split("=");
              if (queryParameter[0] === name) {
                return queryParameter.length > 1 ? decodeURIComponent(queryParameter[1]) : "";
              }
            }
          }

          return null;
        },

        setUrlParam : function(uri, parameterName, parameterValue) {
          var a = document.createElement('a');
          a.href = uri;

          // set empty string as value if not defined or empty
          if (!parameterValue || parameterValue.replace(/^\s+|\s+$/g, '').length === 0) {
            parameterValue = '';
          }

          // check if value is empty
          if (parameterValue.length === 0) {

            // both value and query string is empty (or doesn't contain the param), don't touch the url
            if (a.search.length === 0 || a.search.indexOf(parameterName + "=") === -1) {
              return a.href;
            }
          }

          // query string is empty, just append our new parameter
          if (a.search.length === 0) {
            a.search = '?' + encodeURIComponent(parameterName) + "=" + encodeURIComponent(parameterValue);

            return a.href;
          }

          var oldParameters = a.search.substring(1).split('&');
          var newParameters = [];
          newParameters.push(parameterName + "=" + encodeURIComponent(parameterValue));

          // loop old parameters, remove empty ones and remove the parameter with the same name as the new one
          for (var i = 0; i < oldParameters.length; i++) {
            var oldParameterPair = oldParameters[i];

            if (oldParameterPair.length > 0) {
              var oldParameterName = oldParameterPair.split('=')[0];
              var oldParameterValue = oldParameterPair.split('=')[1];

              // don't add empty parameters again
              if (oldParameterValue && oldParameterValue.replace(/^\s+|\s+$/g, '').length > 0) {
                // skip the the old parameter if it's the same as the new parameter
                if (oldParameterName !== parameterName) {
                  newParameters.push(oldParameterName + "=" + oldParameterValue);
                }
              }
            }
          }

          // join new parameters
          a.search = '?' + newParameters.join('&');

          return a.href;
        },

        appendHiddenWindowIdToForms : function() {
          var forms = document.getElementsByTagName("form");
          for (var i = 0; i < forms.length; i++) {
            var form = forms[i];
            var dspwid = form.elements["dspwid"];
            if (!dspwid) {
              dspwid = document.createElement("INPUT");
              dspwid.setAttribute("name", "dspwid");
              dspwid.setAttribute("type", "hidden");
              form.appendChild(dspwid);
            }

            dspwid.setAttribute("value", dswh.windowId);
          }
        },

        expireCookie : function(cookieName) {
          var date = new Date();
          date.setTime(date.getTime()-(10*24*60*60*1000)); // - 10 day
          var expires = ";max-age=0;expires=" + date.toGMTString();

          document.cookie = cookieName + "=" + expires + "; path=/";
        },

        generateNewRequestToken : function() {
          return "" + Math.floor(Math.random() * 999);
        },

        generateNewWindowId : function() {
          return "" + Math.floor((Math.random() * (9999 - 1000)) + 1000);
        },

        storeCookie : function(name, value, seconds) {
          var expiresDate = new Date();
          expiresDate.setTime(expiresDate.getTime() + (seconds * 1000));
          var expires = "; expires=" + expiresDate.toGMTString();

          document.cookie = name + '=' + value + expires + "; path=/";
        },

        log : function(message) {
          if (dswh.DEBUG_MODE === true) {
            console.log(message);
          }
        }
      }
    };

// required for IE8
if (!Function.prototype.bind) {
  Function.prototype.bind = function (oThis) {
    if (typeof this !== 'function') {
      // closest thing possible to the ECMAScript 5
      // internal IsCallable function
      throw new TypeError('Function.prototype.bind - what is trying to be bound is not callable');
    }

    var aArgs = Array.prototype.slice.call(arguments, 1),
        fToBind = this,
        fNOP = function () {
        },
        fBound = function () {
          return fToBind.apply(this instanceof fNOP && oThis
                  ? this
                  : oThis,
              aArgs.concat(Array.prototype.slice.call(arguments)));
        };

    fNOP.prototype = this.prototype;
    fBound.prototype = new fNOP();

    return fBound;
  };
}