/*
 * Copyright 1997-2009 Day Management AG
 * Barfuesserplatz 6, 4001 Basel, Switzerland
 * All Rights Reserved.
 *
 * This software is the confidential and proprietary information of
 * Day Management AG, ("Confidential Information"). You shall not
 * disclose such Confidential Information and shall use it only in
 * accordance with the terms of the license agreement you entered into
 * with Day.
 */
/**
 * Initializes every needed to select a teaser from a list (dependending on the given strategy) and
 * to load choosen teaser content into a DOM element.
 * @param {Array} allTeasers Teasers list
 * @param strategyName Name of the selection strategy (must be availabe in CQ_Analytics.StrategyManager)
 * @param targetElementId DOM element to insert choosen teaser
 * @param isEditMode True if edit mode is enabled
 */
function initializeTeaserLoader(allTeasers, strategyName, targetElementId, isEditMode) {
    isEditMode = isEditMode == "true" || isEditMode === true;

    if( window.CQ_Analytics ) {
        var toExecute = function() {
            var TEASER_SUFFIX = "/_jcr_content/par.html";

            //function which computes an HTML text describing how selection is done.
            var computeDecisionHTML = function(teaserPath) {
                var html = "";

                var teasers = new Array();
                if (CQ_Analytics.SegmentMgr) {
                    var lastBoost = 0;
                    for (var i = 0; i < allTeasers.length; i++) {
                        if (!allTeasers[i]["segments"] ||
                            allTeasers[i]["segments"].length == 0 ||
                            CQ_Analytics.SegmentMgr.resolveArray(allTeasers[i]["segments"]) === true) {
                            var boost = CQ_Analytics.SegmentMgr.getMaxBoost(allTeasers[i]["segments"]);
                            if (teaserPath == allTeasers[i].path) {
                                html += CQ.I18n.getMessage("<b>Teaser {0} is resolved ( boost = {1} )</b><br>", [allTeasers[i]["name"], boost]);
                            } else {
                                html += CQ.I18n.getMessage("Teaser {0} is resolved with ( boost = {1} )<br>", [allTeasers[i]["name"], boost]);
                            }

                            if (boost == lastBoost) {
                                //same boost, add to list
                                teasers.push(allTeasers[i]);
                            } else {
                                if (boost > lastBoost) {
                                    //better boost, clear list and keep only this one
                                    teasers = new Array();
                                    teasers.push(allTeasers[i]);
                                    lastBoost = boost;
                                }
                            }
                        } else {
                            html += CQ.I18n.getMessage("Teaser {0} is not resolved<br>", allTeasers[i]["name"]);
                        }
                    }
                }
                html += CQ.I18n.getMessage("<br>Strategy <b>{0}</b> selected current teaser.<br>", strategyName);
                return html;
            };

            var currentVisibleTeaser = null;
            var ttip = null;
            //function which chooses and loads a teaser.
            var loadTeasers = function() {
                var teasers = new Array();
                if (CQ_Analytics.SegmentMgr) {
                    var lastBoost = 0;
                    for (var i = 0; i < allTeasers.length; i++) {
                        if (!allTeasers[i]["segments"] ||
                            allTeasers[i]["segments"].length == 0 ||
                            CQ_Analytics.SegmentMgr.resolveArray(allTeasers[i]["segments"]) === true) {
                            var boost = CQ_Analytics.SegmentMgr.getMaxBoost(allTeasers[i]["segments"]);
                            if (boost == lastBoost) {
                                //same boost, add to list
                                teasers.push(allTeasers[i]);
                            } else {
                                if (boost > lastBoost) {
                                    //better boost, clear list and keep only this one
                                    teasers = new Array();
                                    teasers.push(allTeasers[i]);
                                    lastBoost = boost;
                                }
                            }
                        }
                    }
                }
                if (teasers.length > 0) {
                    // fallback: display first
                    var teaserToShow = teasers[0];
                    if (CQ_Analytics.StrategyMgr) {
                        var teas = CQ_Analytics.StrategyMgr.choose(strategyName, teasers);
                        if (teas != null) {
                            teaserToShow = teas;
                        }
                    }
                    if (!currentVisibleTeaser || currentVisibleTeaser.path != teaserToShow.path) {
                        currentVisibleTeaser = teaserToShow;
                        CQ_Analytics.Utils.loadElement(teaserToShow.path + TEASER_SUFFIX, targetElementId);
                        if( isEditMode ) {
                            if( ttip ) {
                                ttip.remove();
                            }
                            var elem = CQ.Ext.get(targetElementId);
                            if(elem) {
                                var ttip = new CQ.Ext.ToolTip({
                                    "target": elem,
                                    "html": computeDecisionHTML(currentVisibleTeaser.path),
                                    "title": CQ.I18n.getMessage("Selection decision"),
                                    "width": 420
                                });
                            }
                        }
                    }
                } else {
                    if( isEditMode && ttip) {
                        ttip.remove();
                    }
                    CQ_Analytics.Utils.clearElement(targetElementId);
                    currentVisibleTeaser = null;
                }
            };

            loadTeasers.call();

            //loaded teaser might change everytime a segment resolution state changes
            if (CQ_Analytics.SegmentMgr) {
                CQ_Analytics.SegmentMgr.addListener("update", loadTeasers);
            }
        };

        //first teaser load is done when all stores are loaded
        if( CQ_Analytics.ClickstreamcloudMgr ) {
            if( CQ_Analytics.ClickstreamcloudMgr.areStoresLoaded ) {
                toExecute.call(this);
            } else {
                CQ_Analytics.ClickstreamcloudMgr.addListener("storesloaded",toExecute);
            }
        }
    }
}