const ksort = obj => {
    let keys = Object.keys(obj).sort()
        , sortedObj = {};

    for (let i in keys) {
        sortedObj[keys[i]] = obj[keys[i]];
    }

    return sortedObj;
}
const checkNullObj = (obj) => {
    if (Object.keys(obj).length === 0) {
        return false
    }
    return true
}


const checkArrayNotNullNumber = (array,notNullNumber = 2) => {
    let num = 0
    for (const item in array) {
       if(array[item]) num++;
    }
    return num >= notNullNumber;
}

// 正切
const tan = angle => {
    return Math.tan(angle * Math.PI / 180)
}
// 余切
const cot = angle => {
    return 1 / tan(angle)
}
// 余弦
const cos = angle => {
    return Math.cos(angle * Math.PI / 180)
}
// 余割
const csc = angle => {
    return 1 / sin(angle)
}
// 正弦
const sin = angle => {
    return Math.sin(angle * Math.PI / 180)
}
// 正割
const sec = angle => {
    return 1 / cos(angle)
}

// 反正弦
const asin = value => {
    return Math.asin(value) * 180 / Math.PI;
}
// 反余弦
const acos = value => {
    return Math.acos(value) * 180 / Math.PI;
}
// 反正切
const atan = value => {
    return Math.atan(value) * 180 / Math.PI;
}

const checkTriangle = (a,b,c) => {
    a = parseInt(a);
    b= parseInt(b);
    c = parseInt(c);
    return a + b > c && a + c > b && b + c > a;
}

const round = (number,percent) => {
    if(!number) return  number
    let flag = number < 0 ? '-' : '';
    let arr = number.toString().split(".");
    if(arr.length > 1 && arr[1].length === 2)  return  number
    let i = Number('1'.padEnd(percent+1,'0'))
    number = Math.floor(Math.abs(Number(number)) * i) / i
    if(arr.length > 1 ){
        let str = arr[1]
        if(str.length > 2 && str[2] >= 5){
            number = Math.ceil(number * i)
            number += 1;
            number = number / i;
        }
    }
    if(number.toString().indexOf(".") === -1) number += ".0"
    arr = number.toString().split(".");
    arr[1] = arr[1].toString().padEnd(2,'0')
    number = arr.join(".")
    return flag+number;
}


export {
    ksort,
    checkNullObj,
    checkArrayNotNullNumber,
    tan,
    cot,
    cos,
    csc,
    sin,
    sec,
    asin,
    acos,
    atan,
    checkTriangle,
    round,
}