/**
 * @license  Highcharts JS v6.0.1 (2017-10-05)
 *
 * Pareto series type for Highcharts
 *
 * (c) 2010-2017 Sebastian Bochan
 *
 * License: www.highcharts.com/license
 */
'use strict';
(function(factory) {
    if (typeof module === 'object' && module.exports) {
        module.exports = factory;
    } else {
        factory(Highcharts);
    }
}(function(Highcharts) {
    var derivedSeriesMixin = (function(H) {

        var each = H.each,
            Series = H.Series,
            addEvent = H.addEvent,
            fireEvent = H.fireEvent,
            wrap = H.wrap,
            noop = H.noop;


        /* ***************************************************************************
         *
         * DERIVED SERIES MIXIN
         *
         **************************************************************************** */

        /**
         * Provides methods for auto setting/updating series data based on the based series data,
         * 
         * @mixin
         **/
        var derivedSeriesMixin = {
            /**
             * Initialise series
             *
             * returns {undefined}
             **/
            init: function() {
                Series.prototype.init.apply(this, arguments);

                this.initialised = false;
                this.baseSeries = null;
                this.eventRemovers = [];

                this.addEvents();
            },

            /**
             * Method to be implemented - inside the method the series has already access to the base series
             * via m `this.baseSeries` and the bases data is initialised. It should
             * return data in the format accepted by Series.setData() method
             *
             * @returns {Array} - an array of data
             **/
            setDerivedData: noop,

            /**
             * Sets base series for the series
             *
             * returns {undefined} 
             **/
            setBaseSeries: function() {
                var chart = this.chart,
                    baseSeriesOptions = this.options.baseSeries,
                    baseSeries =
                    baseSeriesOptions &&
                    (chart.series[baseSeriesOptions] || chart.get(baseSeriesOptions));

                this.baseSeries = baseSeries || null;
            },

            /**
             * Adds events for the series
             *
             * @returns {undefined}
             **/
            addEvents: function() {
                var derivedSeries = this,
                    chartSeriesLinked;

                chartSeriesLinked = addEvent(this.chart, 'seriesLinked', function() {
                    derivedSeries.setBaseSeries();

                    if (derivedSeries.baseSeries && !derivedSeries.initialised) {
                        derivedSeries.setDerivedData();
                        derivedSeries.addBaseSeriesEvents();
                        derivedSeries.initialised = true;
                    }
                });

                this.eventRemovers.push(
                    chartSeriesLinked
                );
            },

            /**
             * Adds events to the base series - it required for recalculating the data in
             * the series if the base series is updated / removed / etc.
             *
             * @returns {undefined}
             **/
            addBaseSeriesEvents: function() {
                var derivedSeries = this,
                    updatedDataRemover,
                    destroyRemover;

                updatedDataRemover = addEvent(derivedSeries.baseSeries, 'updatedData', function() {
                    derivedSeries.setDerivedData();
                });

                destroyRemover = addEvent(derivedSeries.baseSeries, 'destroy', function() {
                    derivedSeries.baseSeries = null;
                    derivedSeries.initialised = false;
                });

                derivedSeries.eventRemovers.push(
                    updatedDataRemover,
                    destroyRemover
                );
            },

            /**
             * Destroys the series
             *
             * @returns {undefined}
             **/
            destroy: function() {
                each(this.eventRemovers, function(remover) {
                    remover();
                });

                Series.prototype.destroy.apply(this, arguments);
            }
        };

        /**
         * Adds a new chart event after the series are linked
         **/
        wrap(H.Chart.prototype, 'linkSeries', function(p) {
            p.call(this);

            fireEvent(this, 'seriesLinked');
        });
        return derivedSeriesMixin;
    }(Highcharts));
    (function(H, derivedSeriesMixin) {
        /**
         * (c) 2010-2017 Sebastian Bochan
         *
         * License: www.highcharts.com/license
         */


        var each = H.each,
            correctFloat = H.correctFloat,
            seriesType = H.seriesType,
            merge = H.merge;


        /**
         * The pareto series type.
         *
         * @constructor seriesTypes.pareto
         * @augments seriesTypes.line
         */

        /**
         * A pareto diagram is a type of chart that contains both bars and a line graph, 
         * where individual values are represented in descending order by bars, 
         * and the cumulative total is represented by the line.
         * 
         * @extends {plotOptions.line}
         * @product highcharts
         * @sample {highcharts} highcharts/demo/pareto/
         *         Pareto diagram
         * @since 6.0.0
         * @excluding allAreas,boostThreshold,borderColor,borderRadius,
         *         borderWidth,crisp,colorAxis,depth,data,edgeColor,edgeWidth,
         *         findNearestPointBy,gapSize,gapUnit,grouping,groupPadding,groupZPadding,maxPointWidth,
         *         keys,negativeColor,pointInterval,pointIntervalUnit,pointPadding,
         *         pointPlacement,pointRange,pointStart,pointWidth,shadow,step,softThreshold,
         *         stacking,threshold,zoneAxis,zones
         * @optionparent plotOptions.pareto
         */

        seriesType('pareto', 'line', {
            /**
             * Higher zIndex than column series to draw line above shapes.
             */
            zIndex: 3
        }, merge(derivedSeriesMixin, {
            /**
             * calculate sum and return percent points
             * 
             * @param  {Object} series
             * @return {Array} Returns array of points [x,y]
             */
            setDerivedData: function() {
                if (this.baseSeries.yData.length > 1) {
                    var xValues = this.baseSeries.xData,
                        yValues = this.baseSeries.yData,
                        sum = this.sumPointsPercents(yValues, xValues, null, true);

                    this.setData(this.sumPointsPercents(yValues, xValues, sum, false), false);
                }
            },
            /**
             * calculate y sum and each percent point
             *
             * @param  {Array} yValues y values
             * @param  {Array} xValues x values
             * @param  {Number} sum of all y values 
             * @param  {Boolean} isSum declares if calculate sum of all points
             * @return {Array} Returns sum of points or array of points [x,y]
             */
            sumPointsPercents: function(yValues, xValues, sum, isSum) {
                var sumY = 0,
                    sumPercent = 0,
                    percentPoints = [],
                    percentPoint;

                each(yValues, function(point, i) {
                    if (point !== null) {
                        if (isSum) {
                            sumY += point;
                        } else {
                            percentPoint = (point / sum) * 100;
                            percentPoints.push([xValues[i], correctFloat(sumPercent + percentPoint)]);
                            sumPercent += percentPoint;
                        }
                    }
                });

                return isSum ? sumY : percentPoints;
            }
        }));

        /**
         * A `pareto` series. If the [type](#series.pareto.type) option is not
         * specified, it is inherited from [chart.type](#chart.type).
         * 
         * For options that apply to multiple series, it is recommended to add
         * them to the [plotOptions.series](#plotOptions.series) options structure.
         * To apply to all series of this specific type, apply it to [plotOptions.
         * pareto](#plotOptions.pareto).
         * 
         * @type {Object}
         * @since 6.0.0
         * @extends series,plotOptions.pareto
         * @excluding data,dataParser,dataURL
         * @product highcharts
         * @apioption series.pareto
         */


        /**
         * An array of data points for the series. For the `pareto` series type,
         * points are calculated dynamically.
         * 
         * @type {Array<Object|Array>}
         * @since 6.0.0
         * @extends series.column.data
         * @product highcharts
         * @apioption series.pareto.data
         */

    }(Highcharts, derivedSeriesMixin));
}));
