import Ember from 'ember';

import d3 from 'd3';

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

export default Ember.Component.extend({

    constants: Ember.inject.service(),

    init: function() {

        this._super(...arguments);

    },

    didRender: function() {

        var self = this;

        var baseURL = env.baseURL.replace(/\/$/,"")+'/api/v1';

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

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

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

            var bubble = d3.layout.pack()

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

                .size([width, height])

                .padding(250);

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

                .style("position", "relative");

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

            var caption = element.append("div")

                .style("position", "absolute")

                .style("transform-origin", "50% 50% 0px")

                .attr("class", "caption");

            var caption_nodes = caption.selectAll(".node")

                .data(bubbles);

            caption_nodes.enter().append("div")

                .style("width", function(d) { return Math.max(10 + d.r, d.r) * 2 + 'px'; })

                .style("height", function(d) { return Math.max(10 + d.r, d.r) * 2 + 'px'; })

                .style("left", function(d) { return d.x - Math.max(10 + d.r, d.r) + 'px'; })

                .text(function(d) { return d.name; })

                .style("text-align", "center")

                .style("display", function(d) { return d.children ? 'none' : 'inline-block'; })

                .style("text-transform", "capitalize")

                .style("font-size", "15px")

            var svg = element.append("svg")

                .style("width", width + "px")

                .style("height", width + "px")

                .attr("class", "bubble");

            var svg_nodes = svg.selectAll(".node")

                .data(bubbles);

            svg_nodes.enter().append("g")

                .attr("class", function(d) { return "node" + (!d.children ? " leaf" : ""); })

            var leaf = svg.selectAll(".leaf")

                .on('click', function(d) { document.location = self.setQueryString('discours', d.name); });

            leaf.append("circle")

                .attr("r", function(d) { return Math.max(7.5 + d.r * 2, d.r * 2); })

                .attr("fill", function(d) { return d.fill; })

                .attr("stroke", function() { return "#000"; });

            element.style("height", height + "px");

        });

        this._super(...arguments);

    },

    createNodes: function(json) {

        var self = this;

        var nodes = {};

        var children = {};

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

            var discourse = json[key];

            var index = self.get('constants').DISCOURSES[key];

            var category = self.get('constants').DISCOURSE_CATEGORIES[index];

            children[index] = children[index] || {};

            children[index]['name'] = index;

            children[index]['children'] = children[index]['children'] || [];

            children[index]['children'].push({ "name": discourse.label, "value": discourse.count, "fill": category.fill });

        });

        nodes.children = [];

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

            nodes.children.push(children[key]);

        });

        return nodes;

    },

    setQueryString: function(field, value) {

        var hash = document.location.href.split('?');

        var query_parameters = hash.length > 1 ? hash.pop() : '';

        // Unserialize

        var parameters = [];

        query_parameters.split('&').forEach(function(parameter){

            var object = parameter.split('=');

            if(object[1]) {

                parameters[object[0]] = object[1];

            }

        });

        // Serialize

        var string = [];

        parameters[field] = encodeURI(value);

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

            string.push(key + '=' + parameters[key]);

        });

        return hash + '?' + string.join('&');

    }

});