import round from 'lodash/round';

import { ColumnInfo } from '../../../../interfaces';
import { EBarDisplayType, EBarGroupingType } from '../../enums';

/**
 * Calculates and returns the rounded absolute or normalized value, dependending on the config value.
 * Enabled grouping always returns the absolute value. The normalized value is only calculated for stacked bars.
 * @param config Bar chart configuration
 * @param value Absolute value
 * @param total Number of values in the category
 * @returns Returns the rounded absolute value. Otherwise returns the rounded normalized value.
 */
export function normalizedValue(
  config: { group: ColumnInfo | null; groupType: EBarGroupingType; display: EBarDisplayType },
  value: number,
  total: number,
): number | null {
  // NOTE: @dv-usama-ansari: Filter out Infinity and -Infinity values. This is required for proper display of minimum and maximum aggregations.
  if ([Infinity, -Infinity, NaN, null, undefined].includes(value)) {
    return null;
  }
  return config.group && config.groupType === EBarGroupingType.STACK && config.display === EBarDisplayType.NORMALIZED
    ? round((value / total) * 100, 2)
    : round(value, 4);
}