import pjson from '/package.json'

function guid() {
	function S4() {
		return (((1 + Math.random()) * 0x10000) | 0).toString(16).substring(1)
	}
	return (`${S4() + S4() + S4() + S4() + S4() + S4() + S4() + S4()}`)
}

function getStorage(name){
    let value = window.localStorage.getItem(pjson.name+'_'+name);
    
    try {
        const temp = JSON.parse(value);
        
        let nowDate = new Date();
        let expireDate = new Date(temp.expire);
        if (temp) {
            if (temp.expire) {
                if (nowDate < expireDate) {
                    return temp.token
                } else {
                    return null;
                }
            } else {
                return temp
            }
        } else {
            return null;
        }
    } catch(e) {
        return value;
    }
}
function setStorage(name, value){
    if (value.expire) {
        value.expire = new Date().getTime() + value.expire * 1000;
    }
    window.localStorage.setItem(pjson.name+'_'+name, JSON.stringify(value));
}

//格式化日期
function formatDate(str){
    let date = new Date(str*1000);
    const year = date.getFullYear();
    const month = date.getMonth() + 1;
    const day = date.getDate();
    return [year, month, day].map(formatNumber).join('-');
}

//格式化时间
function formatTime(str){
    let date = new Date(str*1000);
    const year = date.getFullYear();
    const month = date.getMonth() + 1;
    const day = date.getDate();
    const hour = date.getHours();
    const minute = date.getMinutes();
    const second = date.getSeconds();
    return [year, month, day].map(formatNumber).join('-') + ' ' + [hour, minute, second].map(formatNumber).join(':');
}

function formatFileTime(){
	let date = new Date();
	const year = date.getFullYear();
	const month = date.getMonth() + 1;
	const day = date.getDate();
	const hour = date.getHours();
	const minute = date.getMinutes();
	const second = date.getSeconds();
	return [year, month, day, hour, minute, second].map(formatNumber).join('-');
}

//加0
function formatNumber(n) {
    n = n.toString();
    return n[1] ? n : '0' + n;
}

//验证手机号
const validateMobile = (rule, value, callback) => {
    if (!value) {
        return callback(new Error('手机号不能为空'));
    } else if (!/^1[3456789]\d{9}$/.test(value)) {
        callback('手机号格式不正确');
    } else {
        callback();
    }   
};

//验证手机号不返回内容
const validateMobileNo = (rule, value, callback) => {
    if (!value) {
        return callback(new Error(' '));
    } else if (!/^1[3456789]\d{9}$/.test(value)) {
        callback(' ');
    } else {
        callback();
    }   
};


function getBase64Image(img) {
    var canvas = document.createElement("canvas");
    canvas.width = img.width;
    canvas.height = img.height;
    var ctx = canvas.getContext("2d");
    ctx.drawImage(img, 0, 0, img.width, img.height);
    var dataURL = canvas.toDataURL("image/png");  // 可选其他值 image/jpeg
    return dataURL;
}

function main(src, cb) {
    var image = new Image();
    image.src = src + '?v=' + Math.random(); // 处理缓存
    image.crossOrigin = "*";  // 支持跨域图片
    image.onload = function(){
        var base64 = getBase64Image(image);
        cb && cb(base64);
    }
}

// 处理文件大小
function handleSize(size) {
	let number = '';
	let outStr = '';
	if ((size / 1024 / 1024) < 1) {
		number = (size / 1024).toFixed(2);
		outStr = (size / 1024).toFixed(2) + 'KB';
	} else {
		number = (size / 1024 / 1024).toFixed(2);
		outStr = (size / 1024 / 1024).toFixed(2) + 'MB';
	}
	
	if(isNaN(number)){
		return '-';
	}else{
		return outStr;
	}
}

export default{
    guid,
    formatDate,
    formatTime,
	formatFileTime,
    validateMobile,
    validateMobileNo,
    main,
    getStorage,
    setStorage,
	handleSize
}