/**
 * (c) 2016 Highsoft AS
 * Authors: Jon Arild Nygard
 *
 * License: www.highcharts.com/license
 *
 * This module implements sunburst charts in Highcharts.
 */
'use strict';
import H from '../parts/Globals.js';
import '../mixins/centered-series.js';
import drawPoint from '../mixins/draw-point.js';
import mixinTreeSeries from '../mixins/tree-series.js';
import '../parts/Series.js';
import './treemap.src.js';
var CenteredSeriesMixin = H.CenteredSeriesMixin,
    Series = H.Series,
    each = H.each,
    extend = H.extend,
    getCenter = CenteredSeriesMixin.getCenter,
    getColor = mixinTreeSeries.getColor,
    getLevelOptions = mixinTreeSeries.getLevelOptions,
    getStartAndEndRadians = CenteredSeriesMixin.getStartAndEndRadians,
    grep = H.grep,
    inArray = H.inArray,
    isBoolean = function (x) {
        return typeof x === 'boolean';
    },
    isNumber = H.isNumber,
    isObject = H.isObject,
    isString = H.isString,
    keys = H.keys,
    merge = H.merge,
    noop = H.noop,
    rad2deg = 180 / Math.PI,
    seriesType = H.seriesType,
    seriesTypes = H.seriesTypes,
    setTreeValues = mixinTreeSeries.setTreeValues,
    reduce = H.reduce,
    updateRootId = mixinTreeSeries.updateRootId;

// TODO introduce step, which should default to 1.
var range = function range(from, to) {
    var result = [],
        i;
    if (isNumber(from) && isNumber(to) && from <= to) {
        for (i = from; i <= to; i++) {
            result.push(i);
        }
    }
    return result;
};

/**
 * @param {Object} levelOptions Map of level to its options.
 * @param {Object} params Object containing parameters.
 * @param {Number} params.innerRadius
 * @param {Number} params.outerRadius
 * @
 */
var calculateLevelSizes = function calculateLevelSizes(levelOptions, params) {
    var result,
        p = isObject(params) ? params : {},
        totalWeight = 0,
        diffRadius,
        levels,
        levelsNotIncluded,
        remainingSize,
        from,
        to;

    if (isObject(levelOptions)) {
        result = merge({}, levelOptions); // Copy levelOptions
        from = isNumber(p.from) ? p.from : 0;
        to = isNumber(p.to) ? p.to : 0;
        levels = range(from, to);
        levelsNotIncluded = grep(keys(result), function (k) {
            return inArray(+k, levels) === -1;
        });
        diffRadius = remainingSize = isNumber(p.diffRadius) ? p.diffRadius : 0;
        /**
         * Convert percentage to pixels.
         * Calculate the remaining size to divide between "weight" levels.
         * Calculate total weight to use in convertion from weight to pixels.
         */
        each(levels, function (level) {
            var options = result[level],
                unit = options.levelSize.unit,
                value = options.levelSize.value;
            if (unit === 'weight') {
                totalWeight += value;
            } else if (unit === 'percentage') {
                options.levelSize = {
                    unit: 'pixels',
                    value: (value / 100) * diffRadius
                };
                remainingSize -= options.levelSize.value;
            } else if (unit === 'pixels') {
                remainingSize -= value;
            }
        });

        // Convert weight to pixels.
        each(levels, function (level) {
            var options = result[level],
                weight;
            if (options.levelSize.unit === 'weight') {
                weight = options.levelSize.value;
                result[level].levelSize = {
                    unit: 'pixels',
                    value: (weight / totalWeight) * remainingSize
                };
            }
        });
        // Set all levels not included in interval [from,to] to have 0 pixels.
        each(levelsNotIncluded, function (level) {
            result[level].levelSize = {
                value: 0,
                unit: 'pixels'
            };
        });
    }
    return result;
};

/**
 * getEndPoint - Find a set of coordinates given a start coordinates, an angle,
 *     and a distance.
 *
 * @param  {number} x Start coordinate x
 * @param  {number} y Start coordinate y
 * @param  {number} angle Angle in radians
 * @param  {number} distance Distance from start to end coordinates
 * @return {object} Returns the end coordinates, x and y.
 */
var getEndPoint = function getEndPoint(x, y, angle, distance) {
    return {
        x: x + (Math.cos(angle) * distance),
        y: y + (Math.sin(angle) * distance)
    };
};

var layoutAlgorithm = function layoutAlgorithm(parent, children, options) {
    var startAngle = parent.start,
        range = parent.end - startAngle,
        total = parent.val,
        x = parent.x,
        y = parent.y,
        radius = (
            (
                options &&
                isObject(options.levelSize) &&
                isNumber(options.levelSize.value)
            ) ?
            options.levelSize.value :
            0
        ),
        innerRadius = parent.r,
        outerRadius = innerRadius + radius,
        slicedOffset = options && isNumber(options.slicedOffset) ?
            options.slicedOffset :
            0;

    return reduce(children || [], function (arr, child) {
        var percentage = (1 / total) * child.val,
            radians = percentage * range,
            radiansCenter = startAngle + (radians / 2),
            offsetPosition = getEndPoint(x, y, radiansCenter, slicedOffset),
            values = {
                x: child.sliced ? offsetPosition.x : x,
                y: child.sliced ? offsetPosition.y : y,
                innerR: innerRadius,
                r: outerRadius,
                radius: radius,
                start: startAngle,
                end: startAngle + radians
            };
        arr.push(values);
        startAngle = values.end;
        return arr;
    }, []);
};

var getDlOptions = function getDlOptions(params) {
    // Set options to new object to avoid problems with scope
    var point = params.point,
        shape = isObject(params.shapeArgs) ? params.shapeArgs : {},
        optionsPoint = (
            isObject(params.optionsPoint) ?
            params.optionsPoint.dataLabels :
            {}
        ),
        optionsLevel = (
            isObject(params.level) ?
            params.level.dataLabels :
            {}
        ),
        options = merge({
            style: {}
        }, optionsLevel, optionsPoint),
        rotationRad,
        rotation,
        rotationMode = options.rotationMode;

    if (!isNumber(options.rotation)) {
        if (rotationMode === 'auto') {
            if (
                point.innerArcLength < 1 &&
                point.outerArcLength > shape.radius
            ) {
                rotationRad = 0;
            } else if (
                point.innerArcLength > 1 &&
                point.outerArcLength > 1.5 * shape.radius
            ) {
                rotationMode = 'parallel';
            } else {
                rotationMode = 'perpendicular';
            }
        }

        if (rotationMode !== 'auto') {
            rotationRad = (shape.end - (shape.end - shape.start) / 2);
        }

        if (rotationMode === 'parallel') {
            options.style.width = Math.min(
                shape.radius * 2.5,
                (point.outerArcLength + point.innerArcLength) / 2
            );
        } else {
            options.style.width = shape.radius;
        }

        if (
            rotationMode === 'perpendicular' &&
            point.series.chart.renderer.fontMetrics(options.style.fontSize).h >
            point.outerArcLength
        ) {
            options.style.width = 1;
        }

        // Apply padding (#8515)
        options.style.width = Math.max(
            options.style.width - 2 * (options.padding || 0),
            1
        );

        rotation = (rotationRad * rad2deg) % 180;
        if (rotationMode === 'parallel') {
            rotation -= 90;
        }

        // Prevent text from rotating upside down
        if (rotation > 90) {
            rotation -= 180;
        } else if (rotation < -90) {
            rotation += 180;
        }

        options.rotation = rotation;
    }
    // NOTE: alignDataLabel positions the data label differntly when rotation is
    // 0. Avoiding this by setting rotation to a small number.
    if (options.rotation === 0) {
        options.rotation = 0.001;
    }
    return options;
};

var getAnimation = function getAnimation(shape, params) {
    var point = params.point,
        radians = params.radians,
        innerR = params.innerR,
        idRoot = params.idRoot,
        idPreviousRoot = params.idPreviousRoot,
        shapeExisting = params.shapeExisting,
        shapeRoot = params.shapeRoot,
        shapePreviousRoot = params.shapePreviousRoot,
        visible = params.visible,
        from = {},
        to = {
            end: shape.end,
            start: shape.start,
            innerR: shape.innerR,
            r: shape.r,
            x: shape.x,
            y: shape.y
        };
    if (visible) {
        // Animate points in
        if (!point.graphic && shapePreviousRoot) {
            if (idRoot === point.id) {
                from = {
                    start: radians.start,
                    end: radians.end
                };
            } else {
                from = (shapePreviousRoot.end <= shape.start) ? {
                    start: radians.end,
                    end: radians.end
                } : {
                    start: radians.start,
                    end: radians.start
                };
            }
            // Animate from center and outwards.
            from.innerR = from.r = innerR;
        }
    } else {
        // Animate points out
        if (point.graphic) {
            if (idPreviousRoot === point.id) {
                to = {
                    innerR: innerR,
                    r: innerR
                };
            } else if (shapeRoot) {
                to = (shapeRoot.end <= shapeExisting.start) ?
                {
                    innerR: innerR,
                    r: innerR,
                    start: radians.end,
                    end: radians.end
                } : {
                    innerR: innerR,
                    r: innerR,
                    start: radians.start,
                    end: radians.start
                };
            }
        }
    }
    return {
        from: from,
        to: to
    };
};

var getDrillId = function getDrillId(point, idRoot, mapIdToNode) {
    var drillId,
        node = point.node,
        nodeRoot;
    if (!node.isLeaf) {
        // When it is the root node, the drillId should be set to parent.
        if (idRoot === point.id) {
            nodeRoot = mapIdToNode[idRoot];
            drillId = nodeRoot.parent;
        } else {
            drillId = point.id;
        }
    }
    return drillId;
};

var cbSetTreeValuesBefore = function before(node, options) {
    var mapIdToNode = options.mapIdToNode,
        nodeParent = mapIdToNode[node.parent],
        series = options.series,
        chart = series.chart,
        points = series.points,
        point = points[node.i],
        colorInfo = getColor(node, {
            colors: chart && chart.options && chart.options.colors,
            colorIndex: series.colorIndex,
            index: options.index,
            mapOptionsToLevel: options.mapOptionsToLevel,
            parentColor: nodeParent && nodeParent.color,
            parentColorIndex: nodeParent && nodeParent.colorIndex,
            series: options.series,
            siblings: options.siblings
        });
    node.color = colorInfo.color;
    node.colorIndex = colorInfo.colorIndex;
    if (point) {
        point.color = node.color;
        point.colorIndex = node.colorIndex;
        // Set slicing on node, but avoid slicing the top node.
        node.sliced = (node.id !== options.idRoot) ? point.sliced : false;
    }
    return node;
};

/**
 * A Sunburst displays hierarchical data, where a level in the hierarchy is
 * represented by a circle. The center represents the root node of the tree.
 * The visualization bears a resemblance to both treemap and pie charts.
 *
 * @extends plotOptions.pie
 * @sample highcharts/demo/sunburst Sunburst chart
 * @excluding allAreas, clip, colorAxis, compare, compareBase,
 *            dataGrouping, depth, endAngle, gapSize, gapUnit,
 *            ignoreHiddenPoint, innerSize, joinBy, legendType, linecap,
 *            minSize, navigatorOptions, pointRange
 * @product highcharts
 * @optionparent plotOptions.sunburst
 */
var sunburstOptions = {

    /**
     * Set options on specific levels. Takes precedence over series options,
     * but not point options.
     *
     * @type {Array<Object>}
     * @sample highcharts/demo/sunburst Sunburst chart
     * @apioption plotOptions.sunburst.levels
     */

    /**
     * Can set a `borderColor` on all points which lies on the same level.
     *
     * @type {Color}
     * @apioption plotOptions.sunburst.levels.borderColor
     */

    /**
     * Can set a `borderWidth` on all points which lies on the same level.
     *
     * @type {Number}
     * @apioption plotOptions.sunburst.levels.borderWidth
     */

    /**
     * Can set a `borderDashStyle` on all points which lies on the same level.
     *
     * @type {String}
     * @apioption plotOptions.sunburst.levels.borderDashStyle
     */

    /**
     * Can set a `color` on all points which lies on the same level.
     *
     * @type {Color}
     * @apioption plotOptions.sunburst.levels.color
     */

    /**
     * Can set a `colorVariation` on all points which lies on the same level.
     *
     * @type {Object}
     * @apioption plotOptions.sunburst.levels.colorVariation
     */

    /**
     * The key of a color variation. Currently supports `brightness` only.
     *
     * @type {String}
     * @apioption plotOptions.sunburst.levels.colorVariation.key
     */

    /**
     * The ending value of a color variation. The last sibling will receive this
     * value.
     *
     * @type {Number}
     * @apioption plotOptions.sunburst.levels.colorVariation.to
     */

    /**
     * Can set a `dataLabels` on all points which lies on the same level.
     *
     * @type {Object}
     * @apioption plotOptions.sunburst.levels.dataLabels
     */

    /**
     * Can set a `levelSize` on all points which lies on the same level.
     *
     * @type {Object}
     * @apioption plotOptions.sunburst.levels.levelSize
     */

    /**
     * Can set a `rotation` on all points which lies on the same level.
     *
     * @type {Number}
     * @apioption plotOptions.sunburst.levels.rotation
     */

    /**
     * Can set a `rotationMode` on all points which lies on the same level.
     *
     * @type {String}
     * @apioption plotOptions.sunburst.levels.rotationMode
     */

    /**
     * When enabled the user can click on a point which is a parent and
     * zoom in on its children.
     *
     * @sample highcharts/demo/sunburst
     *         Allow drill to node
     * @type {Boolean}
     * @default false
     * @apioption plotOptions.sunburst.allowDrillToNode
     */

    /**
     * The center of the sunburst chart relative to the plot area. Can be
     * percentages or pixel values.
     *
     * @type    {Array<String|Number>}
     * @sample  {highcharts} highcharts/plotoptions/pie-center/
     *          Centered at 100, 100
     * @product highcharts
     */
    center: ['50%', '50%'],
    colorByPoint: false,
    /**
     * @extends plotOptions.series.dataLabels
     * @excluding align,allowOverlap,distance,staggerLines,step
     */
    dataLabels: {
        allowOverlap: true,
        defer: true,
        style: {
            textOverflow: 'ellipsis'
        },
        /**
         * Decides how the data label will be rotated relative to the perimeter
         * of the sunburst. Valid values are `auto`, `parallel` and
         * `perpendicular`. When `auto`, the best fit will be computed for the
         * point.
         *
         * The `series.rotation` option takes precedence over `rotationMode`.
         *
         * @since 6.0.0
         * @validvalue ["auto", "perpendicular", "parallel"]
         */
        rotationMode: 'auto'
    },
    /**
     * Which point to use as a root in the visualization.
     *
     * @type {String|undefined}
     * @default undefined
     */
    rootId: undefined,

    /**
     * Used together with the levels and `allowDrillToNode` options. When
     * set to false the first level visible when drilling is considered
     * to be level one. Otherwise the level will be the same as the tree
     * structure.
     */
    levelIsConstant: true,
    /**
     * Determines the width of the ring per level.
     * @since 6.0.5
     * @sample {highcharts} highcharts/plotoptions/sunburst-levelsize/
     *         Sunburst with various sizes per level
     */
    levelSize: {
        /**
         * The value used for calculating the width of the ring. Its' affect is
         * determined by `levelSize.unit`.
         * @sample {highcharts} highcharts/plotoptions/sunburst-levelsize/
         *         Sunburst with various sizes per level
         */
        value: 1,
        /**
         * How to interpret `levelSize.value`.
         * `percentage` gives a width relative to result of outer radius minus
         * inner radius.
         * `pixels` gives the ring a fixed width in pixels.
         * `weight` takes the remaining width after percentage and pixels, and
         * distributes it accross all "weighted" levels. The value relative to
         * the sum of all weights determines the width.
         * @validvalue ["percentage", "pixels", "weight"]
         * @sample {highcharts} highcharts/plotoptions/sunburst-levelsize/
         *         Sunburst with various sizes per level
         */
        unit: 'weight'
    },
    /**
     * If a point is sliced, moved out from the center, how many pixels
     * should it be moved?.
     *
     * @since 6.0.4
     * @sample highcharts/plotoptions/sunburst-sliced Sliced sunburst
     */
    slicedOffset: 10
};

/**
 * Properties of the Sunburst series.
 */
var sunburstSeries = {
    drawDataLabels: noop, // drawDataLabels is called in drawPoints
    drawPoints: function drawPoints() {
        var series = this,
            mapOptionsToLevel = series.mapOptionsToLevel,
            shapeRoot = series.shapeRoot,
            group = series.group,
            hasRendered = series.hasRendered,
            idRoot = series.rootNode,
            idPreviousRoot = series.idPreviousRoot,
            nodeMap = series.nodeMap,
            nodePreviousRoot = nodeMap[idPreviousRoot],
            shapePreviousRoot = nodePreviousRoot && nodePreviousRoot.shapeArgs,
            points = series.points,
            radians = series.startAndEndRadians,
            chart = series.chart,
            optionsChart = chart && chart.options && chart.options.chart || {},
            animation = (
                isBoolean(optionsChart.animation) ?
                optionsChart.animation :
                true
            ),
            positions = series.center,
            center = {
                x: positions[0],
                y: positions[1]
            },
            innerR = positions[3] / 2,
            renderer = series.chart.renderer,
            animateLabels,
            animateLabelsCalled = false,
            addedHack = false,
            hackDataLabelAnimation = !!(
                animation &&
                hasRendered &&
                idRoot !== idPreviousRoot &&
                series.dataLabelsGroup
            );

        if (hackDataLabelAnimation) {
            series.dataLabelsGroup.attr({ opacity: 0 });
            animateLabels = function () {
                var s = series;
                animateLabelsCalled = true;
                if (s.dataLabelsGroup) {
                    s.dataLabelsGroup.animate({
                        opacity: 1,
                        visibility: 'visible'
                    });
                }
            };
        }
        each(points, function (point) {
            var node = point.node,
                level = mapOptionsToLevel[node.level],
                shapeExisting = point.shapeExisting || {},
                shape = node.shapeArgs || {},
                animationInfo,
                onComplete,
                visible = !!(node.visible && node.shapeArgs);
            if (hasRendered && animation) {
                animationInfo = getAnimation(shape, {
                    center: center,
                    point: point,
                    radians: radians,
                    innerR: innerR,
                    idRoot: idRoot,
                    idPreviousRoot: idPreviousRoot,
                    shapeExisting: shapeExisting,
                    shapeRoot: shapeRoot,
                    shapePreviousRoot: shapePreviousRoot,
                    visible: visible
                });
            } else {
                // When animation is disabled, attr is called from animation.
                animationInfo = {
                    to: shape,
                    from: {}
                };
            }
            extend(point, {
                shapeExisting: shape, // Store for use in animation
                tooltipPos: [shape.plotX, shape.plotY],
                drillId: getDrillId(point, idRoot, nodeMap),
                name: '' + (point.name || point.id || point.index),
                plotX: shape.plotX, // used for data label position
                plotY: shape.plotY, // used for data label position
                value: node.val,
                isNull: !visible // used for dataLabels & point.draw
            });
            point.dlOptions = getDlOptions({
                point: point,
                level: level,
                optionsPoint: point.options,
                shapeArgs: shape
            });
            if (!addedHack && visible) {
                addedHack = true;
                onComplete = animateLabels;
            }
            point.draw({
                animate: animationInfo.to,
                attr: extend(
                    animationInfo.from,
                    series.pointAttribs && series.pointAttribs(
                        point,
                        point.selected && 'select'
                    )
                ),
                onComplete: onComplete,
                group: group,
                renderer: renderer,
                shapeType: 'arc',
                shapeArgs: shape
            });
        });
        // Draw data labels after points
        // TODO draw labels one by one to avoid addtional looping
        if (hackDataLabelAnimation && addedHack) {
            series.hasRendered = false;
            series.options.dataLabels.defer = true;
            Series.prototype.drawDataLabels.call(series);
            series.hasRendered = true;
            // If animateLabels is called before labels were hidden, then call
            // it again.
            if (animateLabelsCalled) {
                animateLabels();
            }
        } else {
            Series.prototype.drawDataLabels.call(series);
        }
    },
    
    pointAttribs: seriesTypes.column.prototype.pointAttribs,
    

    /*
     * The layout algorithm for the levels
     */
    layoutAlgorithm: layoutAlgorithm,
    /*
     * Set the shape arguments on the nodes. Recursive from root down.
     */
    setShapeArgs: function (parent, parentValues, mapOptionsToLevel) {
        var childrenValues = [],
            level = parent.level + 1,
            options = mapOptionsToLevel[level],
            // Collect all children which should be included
            children = grep(parent.children, function (n) {
                return n.visible;
            }),
            twoPi = 6.28; // Two times Pi.
        childrenValues = this.layoutAlgorithm(parentValues, children, options);
        each(children, function (child, index) {
            var values = childrenValues[index],
                angle = values.start + ((values.end - values.start) / 2),
                radius = values.innerR + ((values.r - values.innerR) / 2),
                radians = (values.end - values.start),
                isCircle = (values.innerR === 0 && radians > twoPi),
                center = (
                    isCircle ?
                    { x: values.x, y: values.y } :
                    getEndPoint(values.x, values.y, angle, radius)
                ),
                val = (
                    child.val ?
                    (
                        child.childrenTotal > child.val ?
                        child.childrenTotal :
                        child.val
                    ) :
                    child.childrenTotal
                );
            // The inner arc length is a convenience for data label filters.
            if (this.points[child.i]) {
                this.points[child.i].innerArcLength = radians * values.innerR;
                this.points[child.i].outerArcLength = radians * values.r;
            }

            child.shapeArgs = merge(values, {
                plotX: center.x,
                plotY: center.y + 4 * Math.abs(Math.cos(angle))
            });
            child.values = merge(values, {
                val: val
            });
            // If node has children, then call method recursively
            if (child.children.length) {
                this.setShapeArgs(child, child.values, mapOptionsToLevel);
            }
        }, this);
    },


    translate: function translate() {
        var series = this,
            options = series.options,
            positions = series.center = getCenter.call(series),
            radians = series.startAndEndRadians = getStartAndEndRadians(
                options.startAngle,
                options.endAngle
            ),
            innerRadius = positions[3] / 2,
            outerRadius = positions[2] / 2,
            diffRadius = outerRadius - innerRadius,
            // NOTE: updateRootId modifies series.
            rootId = updateRootId(series),
            mapIdToNode = series.nodeMap,
            mapOptionsToLevel,
            idTop,
            nodeRoot = mapIdToNode && mapIdToNode[rootId],
            nodeTop,
            tree,
            values;
        series.shapeRoot = nodeRoot && nodeRoot.shapeArgs;
        // Call prototype function
        Series.prototype.translate.call(series);
        // @todo Only if series.isDirtyData is true
        tree = series.tree = series.getTree();
        mapIdToNode = series.nodeMap;
        nodeRoot = mapIdToNode[rootId];
        idTop = isString(nodeRoot.parent) ? nodeRoot.parent : '';
        nodeTop = mapIdToNode[idTop];
        mapOptionsToLevel = getLevelOptions({
            from: nodeRoot.level > 0 ? nodeRoot.level : 1,
            levels: series.options.levels,
            to: tree.height,
            defaults: {
                colorByPoint: options.colorByPoint,
                dataLabels: options.dataLabels,
                levelIsConstant: options.levelIsConstant,
                levelSize: options.levelSize,
                slicedOffset: options.slicedOffset
            }
        });
        // NOTE consider doing calculateLevelSizes in a callback to
        // getLevelOptions
        mapOptionsToLevel = calculateLevelSizes(mapOptionsToLevel, {
            diffRadius: diffRadius,
            from: nodeRoot.level > 0 ? nodeRoot.level : 1,
            to: tree.height
        });
        // TODO Try to combine setTreeValues & setColorRecursive to avoid
        //  unnecessary looping.
        setTreeValues(tree, {
            before: cbSetTreeValuesBefore,
            idRoot: rootId,
            levelIsConstant: options.levelIsConstant,
            mapOptionsToLevel: mapOptionsToLevel,
            mapIdToNode: mapIdToNode,
            points: series.points,
            series: series
        });
        values = mapIdToNode[''].shapeArgs = {
            end: radians.end,
            r: innerRadius,
            start: radians.start,
            val: nodeRoot.val,
            x: positions[0],
            y: positions[1]
        };
        this.setShapeArgs(nodeTop, values, mapOptionsToLevel);
        // Set mapOptionsToLevel on series for use in drawPoints.
        series.mapOptionsToLevel = mapOptionsToLevel;
    },

    /**
     * Animate the slices in. Similar to the animation of polar charts.
     */
    animate: function (init) {
        var chart = this.chart,
            center = [
                chart.plotWidth / 2,
                chart.plotHeight / 2
            ],
            plotLeft = chart.plotLeft,
            plotTop = chart.plotTop,
            attribs,
            group = this.group;

        // Initialize the animation
        if (init) {

            // Scale down the group and place it in the center
            attribs = {
                translateX: center[0] + plotLeft,
                translateY: center[1] + plotTop,
                scaleX: 0.001, // #1499
                scaleY: 0.001,
                rotation: 10,
                opacity: 0.01
            };

            group.attr(attribs);

        // Run the animation
        } else {
            attribs = {
                translateX: plotLeft,
                translateY: plotTop,
                scaleX: 1,
                scaleY: 1,
                rotation: 0,
                opacity: 1
            };
            group.animate(attribs, this.options.animation);

            // Delete this function to allow it only once
            this.animate = null;
        }
    },
    utils: {
        calculateLevelSizes: calculateLevelSizes,
        range: range
    }
};

/**
 * Properties of the Sunburst series.
 */
var sunburstPoint = {
    draw: drawPoint,
    shouldDraw: function shouldDraw() {
        var point = this;
        return !point.isNull;
    }
};

/**
 * A `sunburst` series. If the [type](#series.sunburst.type) option is
 * not specified, it is inherited from [chart.type](#chart.type).
 *
 * @type {Object}
 * @extends series,plotOptions.sunburst
 * @excluding dataParser,dataURL,stack
 * @product highcharts
 * @apioption series.sunburst
 */

/**
 * @type {Array<Object|Number>}
 * @extends series.treemap.data
 * @excluding x,y
 * @product highcharts
 * @apioption series.sunburst.data
 */

/**
* The value of the point, resulting in a relative area of the point
* in the sunburst.
*
* @type {Number}
* @default undefined
* @since 6.0.0
* @product highcharts
* @apioption series.sunburst.data.value
*/

/**
 * Use this option to build a tree structure. The value should be the id of the
 * point which is the parent. If no points has a matching id, or this option is
 * undefined, then the parent will be set to the root.
 *
 * @type {String|undefined}
 * @default undefined
 * @since 6.0.0
 * @product highcharts
 * @apioption series.treemap.data.parent
 */

 /**
  * Whether to display a slice offset from the center. When a sunburst point is
  * sliced, its children are also offset.
  *
  * @type {Boolean}
  * @default false
  * @since 6.0.4
  * @sample highcharts/plotoptions/sunburst-sliced Sliced sunburst
  * @product highcharts
  * @apioption series.sunburst.data.sliced
  */
seriesType(
    'sunburst',
    'treemap',
    sunburstOptions,
    sunburstSeries,
    sunburstPoint
);
