/**
 * 保留2位小数
 * @param value 
 */
var numberFormat = function (value) {
  var v = parseFloat(value)
  //强转Float，毕竟有可能返回是String类型的数字  
  return v.toFixed(2)
}
/**
 * 保留4位小数
 * @param value 
 */
var numberFormatFour = function (value) {
  var v = parseFloat(value)
  //强转Float，毕竟有可能返回是String类型的数字  
  return v.toFixed(4)
}
/**
 * 保留decimal位小数 
 * @param value  值
 * @param decimal 位数
 */
function toFixed(value, decimal) {
  decimal = decimal || 0;
  if (!value) return '0.00';
  return parseFloat(value).toFixed(decimal);
}
//取整
function toIntFixed(value) {
  if (value == undefined) {
    value = 0
  }
  return parseInt(value);
}
//千分符
function toThousandCents(num) {
  if (num == undefined) {
    return 0;
  }
  var num = num + '';
  var d = '';
  if (num.slice(0, 1) == '-') {
    d = num.slice(0, 1);
    num = num.slice(1);
  }
  var len = num.length;
  var index = num.indexOf('.');
  if (index == -1) {
    num = num + '.00';
  } else if ((index + 2) == len) {
    num = num + '0';
  }
  var index = num.indexOf('.'); // 字符出现的位置
  var num2 = num.slice(-3);
  num = num.slice(0, index)
  var result = '';
  while (num.length > 3) {
    result = ',' + num.slice(-3) + result;
    num = num.slice(0, num.length - 3);
  }
  if (num) {
    result = num + result;
  }
  return d + (result + num2)
}

function toPercent(point) {
  var percent = parseFloat(point * 100).toFixed(2);
  return percent;
}

function toThousandCents2(num) {
  if (num == undefined) {
    num = 0
  }
  num.toLocaleString()
}

/**
 * //暴露接口调用
 */
module.exports = {
  toIntFixed: toIntFixed,
  toFixed: toFixed,
  numberFormat: numberFormat,
  numberFormatFour: numberFormatFour,
  toThousandCents: toThousandCents,
  toPercent: toPercent
}