<link rel="import" href="../../bower_components/polymer/polymer.html" />

<link rel="import" href="../../bower_components/paper-material/paper-material.html" />

<link rel="import" href="../../bower_components/paper-dropdown-menu/paper-dropdown-menu.html">
<link rel="import" href="../../bower_components/paper-menu/paper-menu.html">
<link rel="import" href="../../bower_components/paper-item/paper-item.html">

<link rel="import" href="../../bower_components/paper-icon-button/paper-icon-button.html">
<link rel="import" href="../../bower_components/iron-icons/iron-icons.html">
<link rel="import" href="../../bower_components/iron-icon/iron-icon.html">

<dom-module id="select-datalet-inputs_series">

    <template>

        <style is="custom-style">
            :host {
            --paper-dropdown-menu-icon: {
                 color: #2196F3;
             };
            }

            #inputs_series_container {
                font-family: 'Roboto', 'Helvetica Neue', Helvetica, Arial, sans-serif;
                font-size: 16px;

                height: 100%;
                width: 258px;
            }

            .inputs{
                position: relative;
            }

            .input_header {
                height: 32px;
                padding-top: 16px;
                text-align: center;
                font-weight: 700;
                background-color: #B6B6B6;
            }

            #expert_container {
                display: none;
            }

            #expert_header {
                height: 32px;
                padding-top: 16px;
                margin-top: 8px;
                text-align: center;
                font-weight: 700;
                color: #00BCD4;
                cursor: pointer;
            }

            .info_button {
                position: absolute;
                top: 18px;
                right: 0px;
            }

            paper-dropdown-menu {
                height: 48px;
                width: 210px;;
                padding-left: 8px;
                padding-bottom: 8px;
                --paper-input-container-focus-color: #2196F3;
            }

            paper-item.iron-selected {
                background-color: #2196F3;
                color: #FFFFFF;
            }

            paper-icon-button {
                color: #2196F3;
                --paper-icon-button-ink-color: #2196F3;
                margin: 0px;
            }
        </style>

            <paper-material id="inputs_series_container" elevation="5">

                <div class="input_header"><span id="inputs"></span></div>

                <template is="dom-repeat" items="{{inputs}}" index-as="ddl_index">
                    <div class="inputs">
                        <paper-dropdown-menu id={{ddl_index}} label={{_getLabelName(item.name)}}>
                            <paper-menu class="dropdown-content">
                                <template is="dom-repeat" items={{fields}}>
                                    <paper-item id={{index}} on-tap="_addInput">{{_fieldName(item)}}</paper-item>
                                </template>
                            </paper-menu>
                        </paper-dropdown-menu>
                        <div class="info_button">
                            <paper-icon-button id="{{ddl_index}}" on-click="_setOrders" icon="unfold-more" title=""></paper-icon-button>
                        </div>
                    </div>
                </template>

                <div id="expert_header" on-click="_showExpertMode"><span id="groupBy"></span></div>

                <div id="expert_container">

                    <div class="inputs">
                        <paper-dropdown-menu id="group_by" disabled>
                            <paper-menu class="dropdown-content">
                                <template is="dom-repeat" items={{groupableFields}}>
                                    <paper-item id={{index}} on-tap="_setAggregatorsFields">{{_fieldName(item)}}</paper-item>
                                </template>
                            </paper-menu>
                        </paper-dropdown-menu>
                        <div class="info_button">
                            <paper-icon-button id="gb" on-click="_setOrders" icon="unfold-more" title="" disabled></paper-icon-button>
                        </div>
                    </div>

                    <template is="dom-repeat" items="{{aggregateFields}}" as="field">
                        <div class="inputs">
                            <paper-dropdown-menu id="calculate_{{index}}" label="{{_calculateLabel()}}" disabled>
                                <paper-menu class="dropdown-content">
                                    <template is="dom-repeat" items="{{functions}}">
                                        <paper-item id={{index}} on-tap="_setAggregators">{{_operationName(index)}} : {{_fieldName(field)}}</paper-item>
                                    </template>
                                </paper-menu>
                            </paper-dropdown-menu>
                        </div>
                    </template>

                </div>

            </paper-material>


    </template>

    <script>

        Polymer({

            is : 'select-datalet-inputs_series',

            properties : {

                //INPUT
                fields : {type : Array, value : []},

                //OUTPUT
                selectedFields : {type : Array, value : ["", ""]},
                aggregators : {type : Array, value : []},
                orders : {type : Array, value : []},

                expert : {
                    type  : Boolean,
                    value : false
                },

                functions : {
                    type  : Array,
                    value : ["COUNT", "SUM", "MIN", "MAX", "AVG", "FIRST", "LAST"]
                },

                inputs : {
                    type : Array,
                    value : []
                },

                groupableFields : {
                    type : Array,
                    value : []
                },

                aggregateFields : {
                    type : Array,
                    value : [""]
                }

            },

            ready : function() {
                $(this.$.inputs_series_container).perfectScrollbar();
            },

            attached : function() {
                this._translate();
            },

            _preselectInputs : function(fields, aggregators, orders) {
                aggregators = JSON.parse(aggregators);
                orders = JSON.parse(orders);

                //fields = [f1 gb(opt) f2] --> si può cambiare in f1 f2 gb ???

                this.selectedFields = this._copy(fields);

                var ddls = this.$.inputs_series_container.querySelectorAll("paper-dropdown-menu");

                $(ddls[0]).find("paper-menu")[0].select(1);
                $(ddls[1]).find("paper-menu")[0].select(2);

                if(orders.length > 0) {
                    this.orders = this._copy(orders);//wrong
                }

                if(aggregators.length > 0) {
                    this.selectedFields = [fields[0], fields[2]];

                    this.$.group_by.removeAttribute("disabled");
                    $("#calculate_0")[0].removeAttribute("disabled");
                    $("#gb")[0].removeAttribute("disabled");
                    this._showExpertMode();

                    var groupableFields = [];
                    for (var i = 0; i < this.fields.length; i++) {
                        if(this.fields[i] != this.selectedFields[1])
                            groupableFields.push(this.fields[i]);
                    }
                    this.groupableFields = this._copy(groupableFields);
                    this.aggregateFields = [this.selectedFields[1]];

                    $(ddls[0]).find("paper-menu")[0].select(1);
                    $(ddls[1]).find("paper-menu")[0].select(3);

                    this.async(function () {
                        var i = this.functions.indexOf(aggregators[2].operation);

                        $(this.$.group_by).find("paper-menu")[0].select(2);
                        $("#calculate_0").find("paper-menu")[0].select(i);

//                        this._setAggregators();//if dont --> $("#gb")[0].removeAttribute("disabled");
                        this.aggregators = this._copy(aggregators);

                        this.fireReady();
                    }, 0);
                }
            },

            getSelectedFields : function () {
                var gb_menu = $(this.$.group_by).find("paper-menu")[0];
                var c_menu = $("#calculate_0").find("paper-menu")[0];

                if(gb_menu.selectedItem && c_menu.selectedItem && gb_menu.selectedItem.id != 0) {
                    var groupByField = this.groupableFields[gb_menu.selected];
                    if (groupByField != this.selectedFields[0])
                        return [this.selectedFields[0], groupByField, this.selectedFields[1]];
                }
                return this.selectedFields;
            },

            getAggregators : function () {
                return this.aggregators;
            },

            getOrders : function () {
                return this.orders;
            },

            setFields : function(fields) {
                var temp = this._copy(fields);
                temp.unshift("");

                if (JSON.stringify(this.fields) != JSON.stringify(temp)) {
                    this.fields = this._copy(temp);
                    this._reset();
                }
            },

            setInputs : function(inputs) {
                this.inputs = this._copy(inputs);
            },

            fireReady : function() {
                if(this.selectedFields[0] != "" && this.selectedFields[1] != "")
                    this.fire('select_visualization_inputs_ready', {isReady: true});
                else
                    this.fire('select_visualization_inputs_ready', {isReady: false});
            },

            _reset : function() {
                //this.fields = []; --> setFields
                //this.inputs = []; --> setInputs
                this.selectedFields = ["", ""];
                this.aggregators = [];
                //this.orders = []; --> _resetOrders
                this.expert = true;
                this._showExpertMode();//expert --> false
                this.groupableFields = [];
                this.aggregateFields = [""];

                this.async(function () {
                    //reset ddl
                    var ddls = this.$.inputs_series_container.getElementsByTagName("paper-dropdown-menu");
                    for (var i = 0; i < ddls.length; i++)
                        $(ddls[i]).find("paper-menu")[0].select(-1);
                    this.$.group_by.setAttribute("disabled", "");
                    $("#calculate_0")[0].setAttribute("disabled", "");
                    //reset orders
                    this._resetOrders();
                }, 1);
            },

            _translate : function(){
                this.$.inputs.innerHTML = ln["inputs_" + ln["localization"]];
                this.$.groupBy.innerHTML = ln["expertGroupBy_" + ln["localization"]];

                this.$.group_by.setAttribute("label", ln["groupBy_" + ln["localization"]]);
            },

            _showExpertMode : function() {
                if(!this.expert) {
                    this.$.expert_header.style.color = "#000000";
                    this.$.expert_header.style.background = "#B6B6B6";
                    this.$.expert_container.style.display = "block";
                }
                else {
                    this.$.expert_header.style.color = "#00BCD4";
                    this.$.expert_header.style.background = "#FFFFFF";
                    this.$.expert_container.style.display = "none";
                }

                this.expert = !this.expert;
            },

            _addInput : function(e){
                var selectedFields = this._copy(this.selectedFields);

                var ddl_index = $(e.target).parents("paper-dropdown-menu")[0].id;
                var index = e.target.id;
                selectedFields[ddl_index] = this.fields[index];

                this.selectedFields = this._copy(selectedFields);

                if(this.selectedFields[0] == "" || this.selectedFields[1] == "") {
                    this.$.group_by.setAttribute("disabled", "");
                    $("#calculate_0")[0].setAttribute("disabled", "");

                    this.groupableFields = [];
                    this.aggregateFields = [""];
                    var menu = $("#calculate_0").find("paper-menu")[0];
                    menu.select(-1);
                }
                else {
                    this.$.group_by.removeAttribute("disabled");
                    $("#calculate_0")[0].removeAttribute("disabled");

                    var groupableFields = [];
                    for (var i = 0; i < this.fields.length; i++) {
                        if(this.fields[i] != this.selectedFields[1])
                            groupableFields.push(this.fields[i]);
                    }
                    this.groupableFields = this._copy(groupableFields);
                    this.aggregateFields = [this.selectedFields[1]];

                    this.async(function () {
                        var menu = $(this.$.group_by).find("paper-menu")[0];
                        menu.select(-1);
                        var menu = $("#calculate_0").find("paper-menu")[0];
                        //var selected =  menu.selected;
                        menu.select(-1);
                        //menu.select(selected);
                    }, 0);
                }
                this._setAggregators();
            },

            _setAggregatorsFields : function(){
                this.async(function() {
                    var c_menu = $("#calculate_0").find("paper-menu")[0];
                    var selected =  c_menu.selected > 0 ? c_menu.selected : 0;
                    c_menu.select(-1);
                    c_menu.select(selected);

                    this._setAggregators();
                }, 0);
            },

            _setAggregators : function(){
                this.async(function() {
                    this.aggregators = [];

                    this._resetOrders();

                    $("#gb")[0].setAttribute("disabled", "");

                    var gb_menu = $(this.$.group_by).find("paper-menu")[0];
                    var c_menu = $("#calculate_0").find("paper-menu")[0];

                    if(gb_menu.selectedItem && c_menu.selectedItem && gb_menu.selectedItem.id != 0) {
                        var groupByField = this.groupableFields[gb_menu.selected];
                        var operationIndex = c_menu.selectedItem.id;

                        if (groupByField == this.selectedFields[0]){// X Axis field
                            this.aggregators.push({"field": groupByField, "operation": "GROUP BY"});
                        }
                        else{
                            $("#gb")[0].removeAttribute("disabled");
                            this.aggregators.push({"field": this.selectedFields[0], "operation": "GROUP BY"});
                            this.aggregators.push({"field": groupByField, "operation": "GROUP BY"});
                        }

                        this.aggregators.push({"field": this.selectedFields[1], "operation": this.functions[operationIndex]});
                    }

                    this.fireReady();
                }, 0);
            },

            _setOrders : function(e){
                var t = e.target;
                if(t.tagName.indexOf("IRON-ICON") > -1)
                    t = $(e.target).parents("paper-icon-button")[0];

                var icon = t.getAttribute("icon");
                var id = t.getAttribute("id");
                var field;

                if(id == "gb"){
                    var gb_menu = $(this.$.group_by).find("paper-menu")[0];
                    field = this.groupableFields[gb_menu.selected];
                }
                else {
                    field = this.selectedFields[id];
                }

                if(icon.indexOf("unfold-more") > -1){
                    t.setAttribute("icon", "expand-less");
                    t.setAttribute("title", ln["sortAscending_" + ln["localization"]]);
                    var orders = this.orders.filter(function (el) { return el.field !== field; });
                    orders.unshift({"field": field, "operation": "ASC"});
                    this.orders = this._copy(orders);
                }
                else if(icon.indexOf("expand-less") > -1){
                    t.setAttribute("icon", "expand-more");
                    t.setAttribute("title", ln["sortDescending_" + ln["localization"]]);
                    var orders = this.orders.filter(function (el) { return el.field !== field; });
                    orders.unshift({"field": field, "operation": "DESC"});
                    this.orders = this._copy(orders);
                }
                else if(icon.indexOf("expand-more") > -1){
                    t.setAttribute("icon", "unfold-more");
                    t.setAttribute("title", ln["unsort_" + ln["localization"]]);
                    var orders = this.orders.filter(function (el) { return el.field !== field; });
                    this.orders = this._copy(orders);
                }

                this.fireReady();
            },

            _resetOrders : function(){
                var icons = this.$.inputs_series_container.querySelectorAll("paper-icon-button");
                for (var i = 0; i < icons.length; i++){
                    icons[i].setAttribute("icon", "unfold-more");
                    icons[i].setAttribute("title", ln["unsort_" + ln["localization"]]);
                }
                this.orders = [];
            },

            _fieldName : function(field) {
                return field.substring(field.lastIndexOf(",")+1, field.length);
            },

            _getLabelName: function(key) {
                return ln[key + "_" +ln["localization"]];
            },

            _operationName: function(index) {
                var key = this.functions[index];
                return ln[key + "_" +ln["localization"]];
            },

            _calculateLabel: function() {
                return ln["calculate" + "_" +ln["localization"]];
            },

            _copy : function(o) {
                var out, v, key;
                out = Array.isArray(o) ? new Array(o.length) : {};
                for (key in o) {
                    v = o[key];
                    out[key] = (typeof v === "object") ? this._copy(v) : v;
                }
                return out;
            }

        });

    </script>

</dom-module>