import Ember from 'ember';
import d3 from 'd3';
import _ from 'lodash/lodash';

export default Ember.Component.extend({

    classNames: ['discourses-component'],

    constants: Ember.inject.service(),
    filter: Ember.inject.service(),

    discourseObserver: Ember.observer('filter.discourse', function() {
        Ember.$('.item').removeClass("selected");
        if(this.get('filter').get('discourse') !== null) {
            this.get('filter').get('discourse').forEach(function(e) {
                Ember.$('.item[data-id="' + e + '"]').addClass("selected");
            });
        }

    }).on('init'),

    didRender: function() {
        var previousDiv = d3.selectAll(".discourses");
        var self = this;

        var discourses = this.get('discourses');
        var array = discourses.map(function (d) { return d.get('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'))
          .append('div')
          .attr('class','discourses')
          .style('position','absolute')
          .style('left', -100000);

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

        var nodes = element
            .selectAll()
            .data(bubbles);

        nodes.enter().append("div")
            .attr("class", function(d) { return ( d.children ? "category": "item" ) + ( (self.get('filter').get('discourse') !== null && _.contains(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; })
            .style("font-size", function(d) { return Math.floor((((d.value - oldMin) * (13 - 10)) / (oldMax - oldMin)) + 10) + 'px'; })
            .on('click', function(d) {
                self.get('filter').setFilter('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'; });

        previousDiv.remove();
        element.style('position',null).style('left',null);

        this._super(...arguments);
    },

    createNodes: function() {
        var self = this;
        var children = [];
        var discourses = this.get('discourses');

        discourses.forEach(function(discourse) {
            var category_key = self.get('constants').DISCOURSE_CATEGORY_KEYS[discourse.get('id')];
            var category_value = self.get('constants').DISCOURSE_CATEGORY_VALUES[category_key];

            children.push({
                id: discourse.get('id'),
                name: discourse.get('label'),
                value: discourse.get('count'),
                count: discourse.get('count'),
                fill: category_value.fill,
                stroke: category_value.stroke
            });
        });

        return { 'children': children };
    }

});