import {Decimal} from "decimal.js";
// args第一位为被操作数据

//保留小数向上取整
function formatUp(num, len) {
  return new Decimal(num).toDecimalPlaces(len, Decimal.ROUND_UP).toString()
}


//保留小数向下取整
function formatDown(num, len) {
  return new Decimal(num).toDecimalPlaces(len, Decimal.ROUND_DOWN).toNumber()
}

//加法
function add(...args) {
  let result = new Decimal(args[0]);
  for (let i = 1; i < args.length; i++) {
    result = result.add(new Decimal(args[i]));
  }
  return result.toNumber();
}

//减法
function sub(...args) {
  let result = new Decimal(args[0]);
  for (let i = 1; i < args.length; i++) {
    result = result.sub(new Decimal(args[i]));
  }
  return result.toNumber();
}

//乘法
function mul(...args) {
  let result = new Decimal(args[0]);
  for (let i = 1; i < args.length; i++) {
    result = result.mul(new Decimal(args[i]));
  }
  return result.toNumber();
}

//除法
function div(...args) {
  let result = new Decimal(args[0]);
  for (let i = 1; i < args.length; i++) {
    result = result.div(new Decimal(args[i]));
  }
  return result.toNumber();
}

//取余
function mod(...args) {
  let result = new Decimal(args[0]);
  for (let i = 1; i < args.length; i++) {
    result = result.modulo(new Decimal(args[i]));
  }
  return result.toNumber();
}

export default {
  formatUp,
  formatDown,
  add,
  sub,
  mul,
  div,
  mod
};