import Big from 'big.js';
import * as R from 'ramda';
import { formatDecimalNoRound } from './formatDecimalNoRound';
import { RestParams } from './interface';

/**
 * 小数字转大数字
 * @param translateUnit 
 */
export const smallToBig = (translateUnit: number) => {
  return (num: number | string, params?: RestParams) => {

    if (R.isEmpty(num) || R.isNil(num)) return num;
    if (isNaN(Number(num))) {
      return NaN;
    }

    const newNumber = Number(new Big(Number(num)).mul(translateUnit));
    if (R.isNil(params?.decimalNumber) && R.isNil(params?.fn)) {
      return newNumber;
    }

    if (!R.isNil(params?.decimalNumber) && R.isNil(params?.fn)) {
      return Number(newNumber.toFixed(params?.decimalNumber));
    }

    if (!R.isNil(params?.decimalNumber) && !R.isNil(params?.fn)) {
      if (params?.fn === 'toFixed') {
        return Number(newNumber.toFixed(params?.decimalNumber));
      } else if (params?.fn === 'floor') {
        return formatDecimalNoRound(newNumber, params?.decimalNumber);
      }
    }
  }
}