/* *
 * Highcharts funnel module
 *
 * (c) 2010-2019 Torstein Honsi
 *
 * License: www.highcharts.com/license
 */

/* eslint indent: 0 */

'use strict';

import Highcharts from '../parts/Globals.js';
import '../parts/Utilities.js';
import '../parts/Options.js';
import '../parts/Series.js';

// create shortcuts
var seriesType = Highcharts.seriesType,
    seriesTypes = Highcharts.seriesTypes,
    noop = Highcharts.noop,
    pick = Highcharts.pick;

/**
 * @private
 * @class
 * @name Highcharts.seriesTypes.funnel
 *
 * @augments Highcharts.Series
 */
seriesType('funnel', 'pie',
/**
 * Funnel charts are a type of chart often used to visualize stages in a sales
 * project, where the top are the initial stages with the most clients.
 * It requires that the modules/funnel.js file is loaded.
 *
 * @sample highcharts/demo/funnel/
 *         Funnel demo
 *
 * @extends      plotOptions.pie
 * @excluding    size
 * @product      highcharts
 * @optionparent plotOptions.funnel
 */
{

    /**
     * Initial animation is by default disabled for the funnel chart.
     */
    animation: false,

    /**
     * The center of the series. By default, it is centered in the middle
     * of the plot area, so it fills the plot area height.
     *
     * @type    {Array<number|string>}
     * @default ["50%", "50%"]
     * @since   3.0
     */
    center: ['50%', '50%'],

    /**
     * The width of the funnel compared to the width of the plot area,
     * or the pixel width if it is a number.
     *
     * @type  {number|string}
     * @since 3.0
     */
    width: '90%',

    /**
     * The width of the neck, the lower part of the funnel. A number defines
     * pixel width, a percentage string defines a percentage of the plot
     * area width.
     *
     * @sample {highcharts} highcharts/demo/funnel/
     *         Funnel demo
     *
     * @type  {number|string}
     * @since 3.0
     */
    neckWidth: '30%',

    /**
     * The height of the funnel or pyramid. If it is a number it defines
     * the pixel height, if it is a percentage string it is the percentage
     * of the plot area height.
     *
     * @sample {highcharts} highcharts/demo/funnel/
     *         Funnel demo
     *
     * @type  {number|string}
     * @since 3.0
     */
    height: '100%',

    /**
     * The height of the neck, the lower part of the funnel. A number defines
     * pixel width, a percentage string defines a percentage of the plot
     * area height.
     *
     * @type {number|string}
     */
    neckHeight: '25%',

    /**
     * A reversed funnel has the widest area down. A reversed funnel with
     * no neck width and neck height is a pyramid.
     *
     * @since 3.0.10
     */
    reversed: false,

    /** @ignore */
    size: true, // to avoid adapting to data label size in Pie.drawDataLabels

    dataLabels: {
        connectorWidth: 1
    },

    /**
     * Options for the series states.
     */
    states: {
        /**
         * @excluding halo, marker, lineWidth, lineWidthPlus
         * @apioption plotOptions.funnel.states.hover
         */

        /**
         * Options for a selected funnel item.
         *
         * @excluding halo, marker, lineWidth, lineWidthPlus
         */
        select: {
            /**
             * A specific color for the selected point.
             *
             * @type {Highcharts.ColorString|Highcharts.GradientColorObject|Highcharts.PatternObject}
             */
            color: '#cccccc',

            /**
             * A specific border color for the selected point.
             *
             * @type {Highcharts.ColorString}
             */
            borderColor: '#000000'
        }
    }
},

// Properties
{
    animate: noop,

    // Overrides the pie translate method
    translate: function () {

        var
            // Get positions - either an integer or a percentage string
            // must be given
            getLength = function (length, relativeTo) {
                return (/%$/).test(length) ?
                    relativeTo * parseInt(length, 10) / 100 :
                    parseInt(length, 10);
            },

            sum = 0,
            series = this,
            chart = series.chart,
            options = series.options,
            reversed = options.reversed,
            ignoreHiddenPoint = options.ignoreHiddenPoint,
            plotWidth = chart.plotWidth,
            plotHeight = chart.plotHeight,
            cumulative = 0, // start at top
            center = options.center,
            centerX = getLength(center[0], plotWidth),
            centerY = getLength(center[1], plotHeight),
            width = getLength(options.width, plotWidth),
            tempWidth,
            getWidthAt,
            height = getLength(options.height, plotHeight),
            neckWidth = getLength(options.neckWidth, plotWidth),
            neckHeight = getLength(options.neckHeight, plotHeight),
            neckY = (centerY - height / 2) + height - neckHeight,
            data = series.data,
            path,
            fraction,
            half = options.dataLabels.position === 'left' ? 1 : 0,

            x1,
            y1,
            x2,
            x3,
            y3,
            x4,
            y5;

        // Return the width at a specific y coordinate
        series.getWidthAt = getWidthAt = function (y) {
            var top = (centerY - height / 2);

            return (y > neckY || height === neckHeight) ?
                neckWidth :
                neckWidth + (width - neckWidth) *
                    (1 - (y - top) / (height - neckHeight));
        };
        series.getX = function (y, half, point) {
            return centerX + (half ? -1 : 1) *
                ((getWidthAt(reversed ? 2 * centerY - y : y) / 2) +
                point.labelDistance);
        };

        // Expose
        series.center = [centerX, centerY, height];
        series.centerX = centerX;

        /*
           Individual point coordinate naming:

           x1,y1 _________________ x2,y1
            \                         /
             \                       /
              \                     /
               \                   /
                \                 /
               x3,y3 _________ x4,y3

           Additional for the base of the neck:

                 |               |
                 |               |
                 |               |
               x3,y5 _________ x4,y5

         */

        // get the total sum
        data.forEach(function (point) {
            if (!ignoreHiddenPoint || point.visible !== false) {
                sum += point.y;
            }
        });

        data.forEach(function (point) {
            // set start and end positions
            y5 = null;
            fraction = sum ? point.y / sum : 0;
            y1 = centerY - height / 2 + cumulative * height;
            y3 = y1 + fraction * height;
            tempWidth = getWidthAt(y1);
            x1 = centerX - tempWidth / 2;
            x2 = x1 + tempWidth;
            tempWidth = getWidthAt(y3);
            x3 = centerX - tempWidth / 2;
            x4 = x3 + tempWidth;

            // the entire point is within the neck
            if (y1 > neckY) {
                x1 = x3 = centerX - neckWidth / 2;
                x2 = x4 = centerX + neckWidth / 2;

            // the base of the neck
            } else if (y3 > neckY) {
                y5 = y3;

                tempWidth = getWidthAt(neckY);
                x3 = centerX - tempWidth / 2;
                x4 = x3 + tempWidth;

                y3 = neckY;
            }

            if (reversed) {
                y1 = 2 * centerY - y1;
                y3 = 2 * centerY - y3;
                if (y5 !== null) {
                    y5 = 2 * centerY - y5;
                }
            }

            // save the path
            path = [
                'M',
                x1, y1,
                'L',
                x2, y1,
                x4, y3
            ];
            if (y5 !== null) {
                path.push(x4, y5, x3, y5);
            }
            path.push(x3, y3, 'Z');

            // prepare for using shared dr
            point.shapeType = 'path';
            point.shapeArgs = { d: path };


            // for tooltips and data labels
            point.percentage = fraction * 100;
            point.plotX = centerX;
            point.plotY = (y1 + (y5 || y3)) / 2;

            // Placement of tooltips and data labels
            point.tooltipPos = [
                centerX,
                point.plotY
            ];

            // Slice is a noop on funnel points
            point.slice = noop;

            // Mimicking pie data label placement logic
            point.half = half;

            if (!ignoreHiddenPoint || point.visible !== false) {
                cumulative += fraction;
            }
        });
    },

    // Funnel items don't have angles (#2289)
    sortByAngle: function (points) {
        points.sort(function (a, b) {
            return a.plotY - b.plotY;
        });
    },

    // Extend the pie data label method
    drawDataLabels: function () {
        var series = this,
            data = series.data,
            labelDistance = series.options.dataLabels.distance,
            leftSide,
            sign,
            point,
            i = data.length,
            x,
            y;

        // In the original pie label anticollision logic, the slots are
        // distributed from one labelDistance above to one labelDistance below
        // the pie. In funnels we don't want this.
        series.center[2] -= 2 * labelDistance;

        // Set the label position array for each point.
        while (i--) {
            point = data[i];
            leftSide = point.half;
            sign = leftSide ? 1 : -1;
            y = point.plotY;
            point.labelDistance = pick(
                point.options.dataLabels && point.options.dataLabels.distance,
                labelDistance
            );

            series.maxLabelDistance = Math.max(
                point.labelDistance,
                series.maxLabelDistance || 0
            );
            x = series.getX(y, leftSide, point);

            // set the anchor point for data labels
            point.labelPosition = {
                // initial position of the data label - it's utilized for
                // finding the final position for the label
                natural: {
                    x: 0,
                    y: y
                },
                'final': {
                    // used for generating connector path -
                    // initialized later in drawDataLabels function
                    // x: undefined,
                    // y: undefined
                },
                // left - funnel on the left side of the data label
                // right - funnel on the right side of the data label
                alignment: leftSide ? 'right' : 'left',
                connectorPosition: {
                    breakAt: { // used in connectorShapes.fixedOffset
                        x: x + (point.labelDistance - 5) * sign,
                        y: y
                    },
                    touchingSliceAt: {
                        x: x + point.labelDistance * sign,
                        y: y
                    }
                }
            };
        }

        seriesTypes.pie.prototype.drawDataLabels.call(this);
    }

});


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

/**
 * An array of data points for the series. For the `funnel` series type,
 * points can be given in the following ways:
 *
 * 1.  An array of numerical values. In this case, the numerical values
 * will be interpreted as `y` options. Example:
 *
 *  ```js
 *  data: [0, 5, 3, 5]
 *  ```
 *
 * 2.  An array of objects with named values. The following snippet shows only a
 * few settings, see the complete options set below. If the total number of data
 * points exceeds the series' [turboThreshold](#series.funnel.turboThreshold),
 * this option is not available.
 *
 *  ```js
 *     data: [{
 *         y: 3,
 *         name: "Point2",
 *         color: "#00FF00"
 *     }, {
 *         y: 1,
 *         name: "Point1",
 *         color: "#FF00FF"
 *     }]
 *  ```
 *
 * @sample {highcharts} highcharts/chart/reflow-true/
 *         Numerical values
 * @sample {highcharts} highcharts/series/data-array-of-arrays/
 *         Arrays of numeric x and y
 * @sample {highcharts} highcharts/series/data-array-of-arrays-datetime/
 *         Arrays of datetime x and y
 * @sample {highcharts} highcharts/series/data-array-of-name-value/
 *         Arrays of point.name and y
 * @sample {highcharts} highcharts/series/data-array-of-objects/
 *         Config objects
 *
 * @type      {Array<number|*>}
 * @extends   series.pie.data
 * @excluding sliced
 * @product   highcharts
 * @apioption series.funnel.data
 */

/**
 * Pyramid series type.
 *
 * @private
 * @class
 * @name Highcharts.seriesTypes.pyramid
 *
 * @augments Highcharts.Series
 */
seriesType('pyramid', 'funnel',
/**
 * A pyramid series is a special type of funnel, without neck and reversed by
 * default. Requires the funnel module.
 *
 * @sample highcharts/demo/pyramid/
 *         Pyramid chart
 *
 * @extends      plotOptions.funnel
 * @product      highcharts
 * @optionparent plotOptions.pyramid
 */
{
    /**
     * The pyramid neck width is zero by default, as opposed to the funnel,
     * which shares the same layout logic.
     *
     * @since 3.0.10
     */
    neckWidth: '0%',

    /**
     * The pyramid neck width is zero by default, as opposed to the funnel,
     * which shares the same layout logic.
     *
     * @since 3.0.10
     */
    neckHeight: '0%',

    /**
     * The pyramid is reversed by default, as opposed to the funnel, which
     * shares the layout engine, and is not reversed.
     *
     * @since 3.0.10
     */
    reversed: true
});

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

/**
 * An array of data points for the series. For the `pyramid` series
 * type, points can be given in the following ways:
 *
 * 1. An array of numerical values. In this case, the numerical values will be
 *    interpreted as `y` options. Example:
 *    ```js
 *    data: [0, 5, 3, 5]
 *    ```
 *
 * 2. An array of objects with named values. The following snippet shows only a
 *    few settings, see the complete options set below. If the total number of
 *    data points exceeds the series'
 *    [turboThreshold](#series.pyramid.turboThreshold), this option is not
 *    available.
 *    ```js
 *    data: [{
 *        y: 9,
 *        name: "Point2",
 *        color: "#00FF00"
 *    }, {
 *        y: 6,
 *        name: "Point1",
 *        color: "#FF00FF"
 *    }]
 *    ```
 *
 * @sample {highcharts} highcharts/chart/reflow-true/
 *         Numerical values
 * @sample {highcharts} highcharts/series/data-array-of-objects/
 *         Config objects
 *
 * @type      {Array<number|*>}
 * @extends   series.pie.data
 * @excluding sliced
 * @product   highcharts
 * @apioption series.pyramid.data
 */