import Ember from 'ember';

import d3 from 'd3';

import ENV from 'app-client/config/environment';

export default Ember.Component.extend({

    classNames: ['discourses-component'],

    constants: Ember.inject.service(),

    filter: Ember.inject.service(),

    discourseObserver: Ember.observer('filter.discourse', function() {

        Ember.$('.item').removeClass("selected");

        Ember.$('.item[data-id="' + this.get('filter').get('discourse') + '"]').addClass("selected");

    }).on('init'),

    didRender: function() {

        var self = this;

        var baseURL = (ENV.APP.backRootURL || ENV.rootURL).replace(/\/$/,"")+'/api/v1/stats';

        d3.json(baseURL + "/discourses", function(data) {

            var discourses = data['discourses'];

            var array = Object.keys(discourses).map(function (key) { return discourses[key].count; });

            var oldMin = Math.min(...array),

                oldMax = Math.max(...array);

            var sum = array.reduce(function(a, b) { return a + b; });

            var average = sum / array.length;

            var newMin = Math.floor((average - oldMin)),

                newMax = Math.floor((oldMax - average));

            var width = self.$().parent().width();

            var height = self.$().parent().height() - self.$().siblings().outerHeight(true);

            var bubble = d3.layout.pack()

                .sort(function comparator(a, b) { return a.value + b.value; })

                .size([width, height])

                .value(function(d){

                    return Math.floor((((d.value - oldMin) * (newMax - newMin)) / (oldMax - oldMin)) + newMin);

                })

                .padding(10);

            var element = d3.select('#' + self.get('elementId'));

            var bubbles = bubble.nodes(self.createNodes(discourses));

            var nodes = element

                .selectAll()

                .data(bubbles);

            nodes.enter().append("div")

                .attr("class", function(d) { return ( d.children ? "category": "item" ) + ( self.get('filter').get('discourse') === d.id ? " selected" : "" ) ; });

            var item = element.selectAll(".item")

                .attr("data-id", function(d) { return d.id; })

                .style("left", function(d) { return ( d.x - d.r)  + "px"; })

                .style("top", function(d) { return ( d.y - d.r)  + "px"; })

                .style("width", function(d) { return (d.r * 2) + "px"; })

                .style("height", function(d) { return (d.r * 2) + "px"; })

                .style("background-color", function(d) { return d.fill; })

                .style("border-color", function(d) { return d.stroke; })

                .on('click', function(d) {

                    self.get('filter').set('discourse', d.id);

                });

            item.append("span")

                .html(function(d) { return d.name + ' <span class="count">(' + d.count + ')</span>'; })

                .style("margin-left", function() { return ( Ember.$(this).width() > Ember.$(this).parent().width() ? - ( Ember.$(this).width() / 2 ) + ( Ember.$(this).parent().width() / 2 ) : 0 ) + 'px'; })

                .style("margin-top", function() { return Ember.$(this).parent().height() / 2 - Ember.$(this).height() / 2 + 'px'; });

        });

        this._super(...arguments);

    },

    createNodes: function(json) {

        var self = this;

        var children = [];

        Object.keys(json).forEach(function(key) {

            var discourse = json[key];

            var category_key = self.get('constants').DISCOURSE_CATEGORY_KEYS[key];

            var category_value = self.get('constants').DISCOURSE_CATEGORY_VALUES[category_key];

            children.push({

                'id': key,

                'name': discourse.label,

                'value': discourse.count,

                'count': discourse.count,

                'fill': category_value.fill,

                'stroke': category_value.stroke

            });

        });

        return { 'children': children };

    }

});