/* eslint-disable max-len */
import * as DG from 'datagrok-api/dg';
import * as ui from 'datagrok-api/ui';

export const ERROR_CLASS = 'd4-viewer-error';

export namespace ts {
  /** A type guard function.
   * See https://stackoverflow.com/questions/64616994/typescript-type-narrowing-not-working-for-in-when-key-is-stored-in-a-variable*/
  export function hasProp<T extends object>(obj: T, key: PropertyKey): key is keyof T {
    return key in obj;
  }
}

export namespace data {
  export function mapToRange(x: number, min1: number, max1: number, min2: number, max2: number): number {
    const range1 = max1 - min1;
    const range2 = max2 - min2;
    if (range1 === 0)
      return Math.min(Math.max(x, min2), max2);
    return (((x - min1) * range2) / range1) + min2;
  }

  export function aggToStat(dataframe: DG.DataFrame, columnName: string,
    aggregation: DG.AggregationType): number | null {
    const colStatsCall = 'dataframe.getCol(columnName).stats.';
    const stats = {
      'avg': colStatsCall + 'avg',
      'count': colStatsCall + 'totalCount',
      'kurt': colStatsCall + 'kurt',
      'max': colStatsCall + 'max',
      'med': colStatsCall + 'med',
      'min': colStatsCall + 'min',
      'nulls': colStatsCall + 'missingValueCount',
      'q1': colStatsCall + 'q1',
      'q2': colStatsCall + 'q2',
      'q3': colStatsCall + 'q3',
      'skew': colStatsCall + 'skew',
      'stdev': colStatsCall + 'stdev',
      'sum': colStatsCall + 'sum',
      'unique': colStatsCall + 'uniqueCount',
      'values': colStatsCall + 'valuesCount',
      'variance': colStatsCall + 'variance',
      '#selected': 'dataframe.selection.trueCount',
      'first': 'dataframe.getCol(columnName).get(0)',
    };
    return ts.hasProp(stats, aggregation) ? eval(stats[aggregation]) : null;
  }
}

export namespace MessageHandler {
  export function _showMessage(root: HTMLElement, msg: string, className: string) {
    root.appendChild(ui.divText(msg, className));
  }

  export function _removeMessage(root: HTMLElement, className: string) {
    const divTextElement = root.getElementsByClassName(className)[0];
    if (divTextElement)
      root.removeChild(divTextElement);
  }
}