(function (namespace) { // RSS Behavior Common Code. Used for the process of showing or not showing items in RSS feeds.
    'use strict';

    var config = {
        selector: {
            rssBehavior: '[name=RssBehavior]',
            showInRssFeed: "[name='ShowInRssFeed']",
            rssConfigurationEnabled: '[name=RssConfigurationEnabled]',
            $rssBehaviorMultipleCategory: function (categoryId) { return $("[name='RssBehavior." + categoryId + "']"); }
        },
        localization: {
            includeInRssFeedQuestion: 'Would you like to include this in the RSS feed? Click OK to include it.  Click Cancel to exclude it.'
        },
        attributes: {
            addItemBehavior: 'data-add-item-behavior',
            modifyItemBehavior: 'data-modify-item-behavior'
        }
    };
    
    /* Description: Asks the user about RSS behavior and sets a standard field for it if needed ([name='ShowInRssFeed']). Also supports multi category contexts.
       Requirements for use: 
          For any use case you must define a hidden input field [name='ShowInRssFeed']". 
          For item modifies within the context of a single category you must define a hidden input indicating the rss behavior for the category [Name=RssBehavior}] 
          For multicategory selection you must define a hidden input indicating the RSS behavior for a given category [Name=RssBehavior.{categoryId}] 
        
        Example Markup:
           <input type="hidden" name="RssBehavior" data-modify-item-behavior="0" data-add-item-behavior="0"> <!-- For contexts where multiple categories do not exist.
           <input type="hidden" name="RssBehavior.81" data-modify-item-behavior="0" data-add-item-behavior="0"> <!-- 81 should be swapped with the category id -->
        
        Example Usage (all of these will set [name='ShowInRssFeed'] as appropriate; should be called before sending server data; server should save data in field name "ShowInRssFeed" to the item):
            SetFieldForRssBehavior({ categoryId: 5, add:true }); 
            SetFieldForRssBehavior({ modify: true });
            SetFieldForRssBehavior({ add: true });
            SetFieldForRssBehavior({ add: true, showInRssFeedSelector: 'Agenda.ShowInRssField' }); // Overrides the default selector for ShowInRssField
    */
    namespace.SetFieldForRssBehavior = function (options) {
        options = options || {};
        validateOptions(options); // prevent the developer using this function from doing something silly.
        cloneInElementsFromParentWindowIfNeeded();
        if (!verifyRssConfiguration()) {
            return;
        }
        var $rssBehavior = $(config.selector.rssBehavior);

        config.selector.showInRssFeed = options.showInRssFeedSelector || config.selector.showInRssFeed; // override selector for show in rss field if needed.

        if (options.categoryId) {
            $rssBehavior = config.selector.$rssBehaviorMultipleCategory(options.categoryId);
            if (!$rssBehavior.length) {
                console.warn("A category was passed, but the required fields were not setup. (Expected " + config.selector.$rssBehaviorMultipleCategory(options.categoryId).selector + "); Falling back to general setting ("+config.selector.rssBehavior+")");
                $rssBehavior = $(config.selector.rssBehavior);
                if (!$rssBehavior.length) {
                    throw "Required fields were not setup. Rss beahavior is unabled to be determined. Expected " + $rssBehavior.selector;
                }
            }
        }

        UpdateShowInRssFeed($rssBehavior, options.add, options.modify);
    };

    function verifyRssConfiguration() {
        var $showInRssFeed = $(config.selector.showInRssFeed);
        var $rssConfigurationEnabled = $(config.selector.rssConfigurationEnabled);
        if (!$rssConfigurationEnabled.length) {
            
            throw "Rss configuration (the module parameter setting) was not enabled or disabled. Please define " + config.selector.rssConfigurationEnabled;
        }
        if ($rssConfigurationEnabled.val().toLowerCase() === 'false') {
            $showInRssFeed.val('true');
            return false;
        }
        return true;
    }

    // This function is added "robustness". Basically some partials are reused inside LiveEdit IFrames on the front end; but also used on the backend. We also have common wrappers.
    // I ran into a problem where I had to have these fields in the common wrapper because the wrapper itself needed it; but cannot have it in the child partials without a bunch of filtering as then
    // sometimes multiple elements of the same name occur breaking equality comparisions (e.g. duplicate fields go to server as "true,true" as opposed to "true" for a single one).
    // This function will clone in needed elements from the parent for the duration of an iframe session if needed.
    function cloneInElementsFromParentWindowIfNeeded() {
        if (window !== top) { // if this is an iframe
            var $jQueryParent = window.parent.$;
            var $showInRssFeed = $(config.selector.showInRssFeed);
            var $showInRssFeedParent = $jQueryParent(config.selector.showInRssFeed);
            var $rssConfigurationEnabled = $(config.selector.rssConfigurationEnabled);
            var $rssConfigurationEnabledParent = $jQueryParent(config.selector.rssConfigurationEnabled);
            var $rssBehaviors = $('[' + config.attributes.addItemBehavior + ']');
            var $rssBehaviorsParent = $jQueryParent('[' + config.attributes.addItemBehavior + ']');

            if (!$showInRssFeed.length && $showInRssFeedParent.length) { // if show in rss feed exists in parent window but not in our window; let's clone it.
                $(document.forms).prepend($showInRssFeedParent.clone());
            }

            if (!$rssConfigurationEnabled.length && $rssConfigurationEnabledParent.length) { // if rss configuration in rss feed exists in parent window but not in our window; let's clone it.
                $(document.forms).prepend($rssConfigurationEnabledParent.clone());
            }

            if (!$rssBehaviors.length && $rssBehaviorsParent.length) { // if rss behaviors exist in parent window but not in our window; let's clone them.
                $(document.forms).prepend($rssBehaviorsParent.clone());
            }
        }
    }

    function askUserAboutRss() {
        var $showInRssFeed = $(config.selector.showInRssFeed);
        if (!$showInRssFeed.length) {
            throw "ShowInRssFeed field is not defined. Expected " + $showInRssFeed.selector;
        }

        if (confirm(config.localization.includeInRssFeedQuestion)) {
            $showInRssFeed.val('true');
        } else {
            $showInRssFeed.val('false');
        }
    }

    // Primarily a helper for multiple category situations.
    namespace.UpdateShowInRssFeed = function ($rssBehavior, add, modify) {
        var $showInRssFeed = $(config.selector.showInRssFeed);
        

        if (add) {
            if (!$rssBehavior.is("[" + config.attributes.modifyItemBehavior + "]")) {
                throw "Modify behavior was not set. Please set [or check spelling of] attribute " + config.attributes.addItemBehavior + ' on ' + $rssBehavior.selector;
            }

            if ($rssBehavior.attr(config.attributes.addItemBehavior) === "0" || $rssBehavior.attr(config.attributes.addItemBehavior) === 'AlwaysAsk') {
                askUserAboutRss();
            } else {
                $showInRssFeed.val($rssBehavior.attr(config.attributes.addItemBehavior) === '1' || $rssBehavior.attr(config.attributes.addItemBehavior) === 'IncludeInRssFeed');
            }
        } else if (modify) {
            if (!$rssBehavior.is("[" + config.attributes.modifyItemBehavior + "]")) {
                throw "Modify behavior was not set. Please set [or check spelling of] attribute " + config.attributes.modifyItemBehavior + ' on ' + $rssBehavior.selector;
            }

            if ($rssBehavior.attr(config.attributes.modifyItemBehavior) === '0' || $rssBehavior.attr(config.attributes.modifyItemBehavior) === 'AlwaysAsk') {
                askUserAboutRss();
            } else {
                $showInRssFeed.val($rssBehavior.attr(config.attributes.modifyItemBehavior) === '1' || $rssBehavior.attr(config.attributes.modifyItemBehavior) === 'IncludeInRssFeed');
            }
        } else {
            throw "Add or Modify was not specified. The caller of this function should specify one.";
        }
    };

    function validateOptions(options) {
        if (!options.modify && !options.add) {
            throw "The caller of this function must declare if this operation is adding or modifying.";
        }
        if (options.modify && options.add) {
            throw "The caller of this function cannot simulataneously be adding and modifying an item for rss behavior.";
        }
    }

    // 
    namespace.checkForRssPrompt = function (selector) {
        var $rssBehavior = $(selector);
        if (!$rssBehavior.length) {
            throw "ShowInRssFeed field is not defined. Expected " + $rssBehavior.selector;
        }

        if ($rssBehavior.val() == '0') {
            showInRssFeed = confirm(config.localization.includeInRssFeedQuestion);
        } else {
            showInRssFeed = $rssBehavior.val() == '1';
        }
        return showInRssFeed;
    };

    // 
    namespace.attachRssPromptHandlersForSave = function () {
        $(document).ready(function () {
            $('.bigButton.nextAction.modify').unbind('click').click(function (e) {
                var rssBehaviorModifyItems = checkForRssPrompt("#RssBehaviorModifyItems") ? '1' : '2';
                $('#RssBehaviorModifyItems').val(rssBehaviorModifyItems);
            });
        });
    };

    // 
    namespace.handleRssSaveAndSend = function (isPublish) {
        showInRssFeed = checkForRssPrompt(isPublish ? '#RssBehaviorAddItems' : '#RssBehaviorModifyItems');
        $('#ShowInRssFeed').val(showInRssFeed ? "1" : "0");
    };

    namespace.showInRssFeed = true;
}(window));