/**
 * @license Highstock JS v7.2.0 (2019-09-03)
 *
 * Indicator series type for Highstock
 *
 * (c) 2010-2019 Paweł Fus
 *
 * License: www.highcharts.com/license
 */
'use strict';
(function (factory) {
    if (typeof module === 'object' && module.exports) {
        factory['default'] = factory;
        module.exports = factory;
    } else if (typeof define === 'function' && define.amd) {
        define('highcharts/indicators/rsi', ['highcharts', 'highcharts/modules/stock'], function (Highcharts) {
            factory(Highcharts);
            factory.Highcharts = Highcharts;
            return factory;
        });
    } else {
        factory(typeof Highcharts !== 'undefined' ? Highcharts : undefined);
    }
}(function (Highcharts) {
    var _modules = Highcharts ? Highcharts._modules : {};
    function _registerModule(obj, path, args, fn) {
        if (!obj.hasOwnProperty(path)) {
            obj[path] = fn.apply(null, args);
        }
    }
    _registerModule(_modules, 'indicators/rsi.src.js', [_modules['parts/Globals.js'], _modules['parts/Utilities.js']], function (H, U) {
        /* *
         *
         *  License: www.highcharts.com/license
         *
         * */



        var isArray = U.isArray;

        // Utils:
        function toFixed(a, n) {
            return parseFloat(a.toFixed(n));
        }

        /**
         * The RSI series type.
         *
         * @private
         * @class
         * @name Highcharts.seriesTypes.rsi
         *
         * @augments Highcharts.Series
         */
        H.seriesType(
            'rsi',
            'sma',
            /**
             * Relative strength index (RSI) technical indicator. This series
             * requires the `linkedTo` option to be set and should be loaded after
             * the `stock/indicators/indicators.js` file.
             *
             * @sample stock/indicators/rsi
             *         RSI indicator
             *
             * @extends      plotOptions.sma
             * @since        6.0.0
             * @product      highstock
             * @optionparent plotOptions.rsi
             */
            {
                /**
                 * @excluding index
                 */
                params: {
                    period: 14,
                    /**
                     * Number of maximum decimals that are used in RSI calculations.
                     */
                    decimals: 4
                }
            },
            /**
             * @lends Highcharts.Series#
             */
            {
                getValues: function (series, params) {
                    var period = params.period,
                        xVal = series.xData,
                        yVal = series.yData,
                        yValLen = yVal ? yVal.length : 0,
                        decimals = params.decimals,
                        // RSI starts calculations from the second point
                        // Cause we need to calculate change between two points
                        range = 1,
                        RSI = [],
                        xData = [],
                        yData = [],
                        index = 3,
                        gain = 0,
                        loss = 0,
                        RSIPoint, change, avgGain, avgLoss, i;

                    // RSI requires close value
                    if (
                        (xVal.length < period) || !isArray(yVal[0]) ||
                        yVal[0].length !== 4
                    ) {
                        return false;
                    }

                    // Calculate changes for first N points
                    while (range < period) {
                        change = toFixed(
                            yVal[range][index] - yVal[range - 1][index],
                            decimals
                        );

                        if (change > 0) {
                            gain += change;
                        } else {
                            loss += Math.abs(change);
                        }

                        range++;
                    }

                    // Average for first n-1 points:
                    avgGain = toFixed(gain / (period - 1), decimals);
                    avgLoss = toFixed(loss / (period - 1), decimals);

                    for (i = range; i < yValLen; i++) {
                        change = toFixed(yVal[i][index] - yVal[i - 1][index], decimals);

                        if (change > 0) {
                            gain = change;
                            loss = 0;
                        } else {
                            gain = 0;
                            loss = Math.abs(change);
                        }

                        // Calculate smoothed averages, RS, RSI values:
                        avgGain = toFixed(
                            (avgGain * (period - 1) + gain) / period,
                            decimals
                        );
                        avgLoss = toFixed(
                            (avgLoss * (period - 1) + loss) / period,
                            decimals
                        );
                        // If average-loss is equal zero, then by definition RSI is set
                        // to 100:
                        if (avgLoss === 0) {
                            RSIPoint = 100;
                        // If average-gain is equal zero, then by definition RSI is set
                        // to 0:
                        } else if (avgGain === 0) {
                            RSIPoint = 0;
                        } else {
                            RSIPoint = toFixed(
                                100 - (100 / (1 + (avgGain / avgLoss))),
                                decimals
                            );
                        }

                        RSI.push([xVal[i], RSIPoint]);
                        xData.push(xVal[i]);
                        yData.push(RSIPoint);
                    }

                    return {
                        values: RSI,
                        xData: xData,
                        yData: yData
                    };
                }
            }
        );

        /**
         * A `RSI` series. If the [type](#series.rsi.type) option is not
         * specified, it is inherited from [chart.type](#chart.type).
         *
         * @extends   series,plotOptions.rsi
         * @since     6.0.0
         * @product   highstock
         * @excluding dataParser, dataURL
         * @apioption series.rsi
         */

    });
    _registerModule(_modules, 'masters/indicators/rsi.src.js', [], function () {


    });
}));