/* *
 *
 *  A commercial license may be required depending on use.
 *  See www.highcharts.com/license
 *
 *
 * */
'use strict';
import SeriesRegistry from '../../../Core/Series/SeriesRegistry.js';
const { sma: SMAIndicator } = SeriesRegistry.seriesTypes;
import U from '../../../Core/Utilities.js';
const { extend, isArray, merge } = U;
/* *
 *
 *  Functions
 *
 * */
/**
 * @private
 */
function populateAverage(xVal, yVal, i, period, index) {
    const mmY = yVal[i - 1][index] - yVal[i - period - 1][index], mmX = xVal[i - 1];
    return [mmX, mmY];
}
/* *
 *
 *  Class
 *
 * */
/**
 * The Momentum series type.
 *
 * @private
 * @class
 * @name Highcharts.seriesTypes.momentum
 *
 * @augments Highcharts.Series
 */
class MomentumIndicator extends SMAIndicator {
    /* *
     *
     *  Functions
     *
     * */
    getValues(series, params) {
        const period = params.period, index = params.index, xVal = series.xData, yVal = series.yData, yValLen = yVal ? yVal.length : 0, MM = [], xData = [], yData = [];
        let i, MMPoint;
        if (xVal.length <= period) {
            return;
        }
        // Switch index for OHLC / Candlestick / Arearange
        if (!isArray(yVal[0])) {
            return;
        }
        // Calculate value one-by-one for each period in visible data
        for (i = (period + 1); i < yValLen; i++) {
            MMPoint = populateAverage(xVal, yVal, i, period, index);
            MM.push(MMPoint);
            xData.push(MMPoint[0]);
            yData.push(MMPoint[1]);
        }
        MMPoint = populateAverage(xVal, yVal, i, period, index);
        MM.push(MMPoint);
        xData.push(MMPoint[0]);
        yData.push(MMPoint[1]);
        return {
            values: MM,
            xData: xData,
            yData: yData
        };
    }
}
/* *
 *
 *  Static Properties
 *
 * */
/**
 * Momentum. This series requires `linkedTo` option to be set.
 *
 * @sample stock/indicators/momentum
 *         Momentum indicator
 *
 * @extends      plotOptions.sma
 * @since        6.0.0
 * @product      highstock
 * @requires     stock/indicators/indicators
 * @requires     stock/indicators/momentum
 * @optionparent plotOptions.momentum
 */
MomentumIndicator.defaultOptions = merge(SMAIndicator.defaultOptions, {
    params: {
        index: 3
    }
});
extend(MomentumIndicator.prototype, {
    nameBase: 'Momentum'
});
SeriesRegistry.registerSeriesType('momentum', MomentumIndicator);
/* *
 *
 *  Default Export
 *
 * */
export default MomentumIndicator;
/* *
 *
 *  API Options
 *
 * */
/**
 * A `Momentum` series. If the [type](#series.momentum.type) option is not
 * specified, it is inherited from [chart.type](#chart.type).
 *
 * @extends   series,plotOptions.momentum
 * @since     6.0.0
 * @excluding dataParser, dataURL
 * @product   highstock
 * @requires  stock/indicators/indicators
 * @requires  stock/indicators/momentum
 * @apioption series.momentum
 */
''; // To include the above in the js output
