/**
 * Licensed Materials - Property of IBM
 * 
 * IBM Cognos Products: SHARE
 * 
 * Copyright IBM Corp. 2015, 2017
 * 
 * US Government Users Restricted Rights - Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp.
 */
define([
        'jquery',
        'underscore',
        'moment-timezone',
        'rave2',
        'q',
        'bi/commons/utils/BidiUtil',
        'text!bi/schedule/templates/SubscriptionManagementLoading.html',
        'text!bi/schedule/templates/SubscriptionManagement.html',
        'text!bi/notifications/templates/emptyMessageList.html',
        'bi/glass/app/ContentView',
        'bi/sharecommon/utils/simpledoT',
        'bi/sharecommon/utils/translator',
        'bi/schedule/app/appControler',
        'bi/schedule/utils/CadenceLabelGenerator',
        'bi/commons/ui/properties/CheckBox',
        'bi/commons/utils/Utils',
        'bi/schedule/utils/charts/BarChart',

        'datatables'
    ],

    function($, _, moment, rave, Q, BidiUtil,
        loadingViewTemplate, viewTemplate, emptyListTemplate,
        ContentView, dot, t, controler, cadence, CheckBox, Utils, BarChart) {

        var DEFAULT_DELAY = 500;
        var __STANDARD_DATE_TIME_FORMAT = 'lll';

        var view = ContentView.extend({

            init: function(options) {
                view.inherited('init', this, arguments);

                // Initialise default values
                this.subscriptionsCount = 0;
                this.enabledCount = 0;
                this.disabledCount = 0;
                this.windowWidth = 0;
                this.timezone = options.glassContext.services.userProfile.preferences.timeZoneID;
                this.contentLocale = this.glassContext.services.userProfile.preferences.contentLocale || "en-us";

                $.extend(this, options);

                this._id = _.uniqueId("smv_");
                this.$subscriptionsListDiv = null;
                this.$noSubscriptionsDiv = null;
            },

            activate: function() {
                return this.updateView();
            },

            // nothing to do, but needs to be present for AppView.js logic from Glass
            deactivate: function() {
                
            },

            getContent: function() {
                return {};
            },

            getTitle: function() {
                return t.translate("subscribe_mgmt_label");
            },

            getIcon: function() {
                return 'common-subscribe_icon';
            },

            render: function() {
                var deferred = $.Deferred();

                var subscribe_graph_title = t.translate("subscribe_graph_title");
                var subscribe_last_refresh_label = t.translate("subscribe_last_refresh_label");

                // Set up the Subscription Management Loading template
                // I don't like this but it works (for now)
                var loadingHtmlGenerator = dot.simpleTemplate(loadingViewTemplate);
                
                var currentTime = moment(new Date()).locale(this.contentLocale).tz(this.timezone).format(__STANDARD_DATE_TIME_FORMAT);
                
                var attributes = {
                    subscribe_graph_title: subscribe_graph_title,
                    subscribe_last_refresh_label: subscribe_last_refresh_label,
                    current_time: currentTime
                };
                this.$el.html(loadingHtmlGenerator(attributes));
                var loadingAnimation = Utils.getLoadingAnimation(2);
                this.$el.find('div.s10n_loading').html(loadingAnimation);

                deferred.resolve(this);

                controler.getSubscriptions(this.glassContext).then(function(data) {
                    var subscriptions = [];
                    this.enabledCount = 0;
                    var dataLength = data.length;

                    for(var i = 0; i < dataLength; i++) {
                        var name = _.escape(data[i].name.substr(0, 3) + BidiUtil.enforceTextDirection(data[i].name.substr(3))) || "";
                        var nameInAttr = _.escape(data[i].name)|| "";
                        var cadenceLabel = cadence.getLabelFor(data[i].scheduleInfo, this.timezone, this.contentLocale);
                        var ownerName = data[i].scheduleInfo ? _.escape(data[i].scheduleInfo.ownerName) || "" : "";
                        var lastModified = data[i].scheduleInfo ? data[i].scheduleInfo.modificationTime || "" : "";
                        lastModified = moment(lastModified).locale(this.contentLocale).tz(this.timezone).format(__STANDARD_DATE_TIME_FORMAT);
                        data[i].checkbox_aria_label = t.translate("subscribe_mgmt_checkbox_description", {
                            'subscription_name': nameInAttr
                        });

                        var isEnabled = data[i].scheduleInfo.active || false;
                        if(isEnabled) {
                            this.enabledCount++;
                        }

                        subscriptions.push({
                            id: data[i].id,
                            name: name,
                            owner: ownerName,
                            active: isEnabled,
                            modifiedTime: lastModified,
                            cadence_label: cadenceLabel, // "Every Wednesday at 5pm"
                            context_menu_description: t.translate("subs_mgmt_context_menu_description", {
                                'subscription_name': nameInAttr
                             })
                        });
                    }
                    this.subscriptionsCount = subscriptions.length;
                    this.disabledCount = subscriptions.length - this.enabledCount;

                    var htmlGenerator = dot.simpleTemplate(viewTemplate);
                    
                    var currentTime = moment(new Date()).locale(this.contentLocale).tz(this.timezone).format(__STANDARD_DATE_TIME_FORMAT);
                    
                    var attributes = {
                        id: this._id,
                        subscribe_graph_title: subscribe_graph_title,
                        subscribe_last_refresh_label: subscribe_last_refresh_label,
                        current_time: currentTime,
                        ariaLabel: t.translate("subscriptions_table_accessible_label"),
                        chartDescription: t.translate("subscribe_graph_description", {
                            enabled: this.enabledCount, disabled: this.disabledCount
                        }),

                        columns: this._tableColumnHeaders(),
                        subs: subscriptions
                    };
                    this.$el.html(htmlGenerator(attributes));

                    // By default both are displayed. We choose which to hide later
                    this.$subscriptionsListDiv = this.$el.find('.subscriptions_list');
                    this.$noSubscriptionsDiv = this.$el.find('.no_subscriptions_message');

                    var emptyTemplate = dot.template(emptyListTemplate);
                    this.$noSubscriptionsDiv.html(emptyTemplate({
                        'text': t.translate("subscription_list_is_empty")
                    }));

                    this._setSvg();
                    this._renderChart();
                    this._renderCheckBoxes(data);

                if (this.subscriptionsCount > 0) {
                    this.$subscriptionsListDiv.find('.subscriptions_list_table').dataTable({
                            paging: false,
                            searching: false,
                            info: false,
                            aaSorting: [[1, 'asc']],
                            scrollY: '60vh',
                            scrollX: 'auto',
                            width: '100%'
                            });
                        this.$noSubscriptionsDiv.hide();
                    }
                    else {
                        this.$subscriptionsListDiv.hide();
                    }

                    this._fixTableBodyHeight();
                    this._setEvents();
                }.bind(this));

                return deferred.promise();
            },

            updateView: function() {
                this.$el.empty();
                return this.render();
            },

            _renderChart: function() {
                var chartData = [
                     {
                         name: 'enabled',
                         value: this.enabledCount
                     },
                     {
                         name: 'disabled',
                         value: this.disabledCount
                     }
                 ];
                
                // This initialises AND draws the chart
                this._chart = new BarChart({
                    $el: this.$el.find('svg.chart'),
                    data: chartData
                });
            },

            _updateChart: function(data) {
                this._chart.redraw(data);
            },

            _renderCheckBoxes: function(data) {
                var _self = this;

                for(var i = 0; i < data.length; i++) {
                    var stateToggler = new CheckBox({
                        'id': 'subscription_' + data[i].id,
                        'el': _self.$el.find("[data-subscription-id='"+ data[i].id +"'] > td:first"),
                        'name': data[i].id,
                        'label': '',
                        'ariaLabel': data[i].checkbox_aria_label,
                        'checked': data[i].scheduleInfo.active,
                        'onChange': function(name, value) {
                            _self._handleCheckBoxes({
                                subscriptionId: name,
                                state: value,
                                $checkbox: this.getPropertyNode() // 'this' is CheckBox NOT SubMgmtView
                            });
                        }
                    });

                    stateToggler.doRender();
                }
            },

            _handleCheckBoxes: function(properties) {
                var subscriptionId = properties.subscriptionId;
                var state = properties.state;
                var $checkbox = properties.$checkbox;

                $checkbox.addClass('disabled');
                controler.getSubscriptionDetails(subscriptionId, this.glassContext).then(function(data) {
                    subscriptionDescriptor = data;
                    subscriptionDescriptor.scheduleInfo.active = state;

                    this._toggleSingleSubscriptionStatus(subscriptionDescriptor).then(function() {
                        $checkbox.removeClass('disabled');
                    });
                }.bind(this));
            },

            _toggleSingleSubscriptionStatus: function(descriptor) {
                var deferred = Q.defer();

                controler.updateSubscription(descriptor, this.glassContext).done(function(data) {
                    this._updateSubscriptionList().then(function() {
                        deferred.resolve();
                    });
                }.bind(this));

                return deferred.promise;
            },

            _fixTableBodyHeight: function() {
                var contentHeight = this.$el.find('div.s10n_main').height(); // this is height of pane minus top and bottom padding
                var topHeight = this.$el.find('div.s10n_header').height() + this.$el.find('svg.chart').height();
                // The magic number 40 is for the padding in the content view from the css class s10n_container
                this.$el.find('div.dataTables_scrollBody').height(contentHeight - topHeight - 40);
            },

            _setEvents: function() {
                var _self = this;
                window.onresize = function() {
                    if(_self.$el.find('svg.chart').css('visibility') !== 'hidden' && $(window).width() !== _self.windowWidth) {
                        _self.windowWidth = $(window).width();
                        _self._updateChart();
                    }
                    // Fix height of datatable container
                    _self._fixTableBodyHeight();
                };

                $('button.btnContextMenu').on('clicktap', function(event) {
                    var menuProperties = {
                        'menuId': 'com.ibm.bi.subscribe_mgmt.contextMenu',
                        'position': {
                            pageX: event.pageX,
                            pageY: event.pageY
                        },
                        'activeObject': {
                            currentTarget: event.currentTarget,
                            subscriptionId: $(event.currentTarget).closest('tr').data('subscription-id'),
                            updateCallback: _self.updateView.bind(_self),
                            deleteCallbacks: {
                                hideRow: _self._hideDeleteRow.bind(_self),
                                undoDelete: _self._undoDeleteAndShowRow.bind(_self),
                                complete: _self._completeSubscriptionDelete.bind(_self)
                            }
                        }
                    };
                    _self.glassContext.appController.showContextMenu(menuProperties);
                });
            },

            _hideDeleteRow: function($subscriptionRow) {
                var deferred = Q.defer();
                var _self = this;
                $subscriptionRow.hide(DEFAULT_DELAY, function() {
                    if(_self.subscriptionsCount == 1) {
                        _self.$noSubscriptionsDiv.show();
                        _self.$subscriptionsListDiv.hide();
                    }
                    deferred.resolve();
                });
                return deferred.promise;
            },

            _undoDeleteAndShowRow: function($subscriptionRow) {
                var _self = this;
                // An undo should show right away that is the reason for zero
                $subscriptionRow.show(0, function() {
                    if(_self.subscriptionsCount == 1) {
                        _self.$noSubscriptionsDiv.hide();
                        _self.$subscriptionsListDiv.show();
                    }
                });
            },

            _completeSubscriptionDelete: function(options) {
                if(options.pending) {
                    controler.deleteSubscription(options.subscriptionId, this.glassContext).done(function() {
                        this._updateSubscriptionList();
                    }.bind(this));
                }
            },

            _updateSubscriptionList: function() {
                var deferred = Q.defer();

                controler.getSubscriptions(this.glassContext).done(function(data) {
                    this.subscriptionsCount = data.length;

                    var enabled = _.countBy(data, function(s) {
                        if(s.scheduleInfo.active)
                            return "enabled";
                    });
                    if(!enabled.enabled) {
                        enabled.enabled = 0;
                    }

                    this.enabledCount = enabled.enabled;
                    this.disabledCount = this.subscriptionsCount - enabled.enabled;

                    if(this.subscriptionsCount === 0) {
                        this.$noSubscriptionsDiv.show();
                        this.$subscriptionsListDiv.hide();
                    }

                    var chartData = [
                        {
                            name: 'enabled',
                            value: this.enabledCount
                        },
                        {
                            name: 'disabled',
                            value: this.disabledCount
                        }
                    ];
                    this._updateChart(chartData);

                    deferred.resolve();
                }.bind(this));

                return deferred.promise;
            },

            _setSvg: function() {
                var $icons = this.$el.find('.common_icon');
                for(var i = 0; i < $icons.length; i++) {
                    var $icon = $($icons[i]);
                    Utils.setIcon($icon, 'common-' + $icon.data('icon'), t.translate('svg_menu_icon'));
                }
            },

            _tableColumnHeaders: function() {
                return [
                    {
                        'name': 'enable',
                        'label': t.translate("subscribe_status_header"),
                        'class': 's10n_status_col'
                    },
                    // Subscription name column
                    {
                        'name': 'name',
                        'label': t.translate("subscribe_header"),
                        'sort': true
                    },
                    // Owner column
                    {
                        'name': 'owner',
                        'label': t.translate("subscribe_owner_header"),
                        'sort': true
                    },
                    // Modified column
                    {
                        'name': 'modified',
                        'label': t.translate("subscribe_modified_header"),
                        'sort': true
                    },
                    // Context Menu column to modify/view history/delete
                    {
                        'name': 'context'
                    }
                ];
            }
        });

        return view;
});