function pluralize(time, label) {
    if (time === 1) {
        return time + label
    }
    return time + label + 's'
}
/**
 * 日期格式化
 */
export function dateFormat(date) {
    let format = 'yyyy-MM-dd hh:mm:ss';
    if (date != 'Invalid Date') {
        var o = {
            "M+": date.getMonth() + 1, //month
            "d+": date.getDate(), //day
            "h+": date.getHours(), //hour
            "m+": date.getMinutes(), //minute
            "s+": date.getSeconds(), //second
            "q+": Math.floor((date.getMonth() + 3) / 3), //quarter
            "S": date.getMilliseconds() //millisecond
        }
        if (/(y+)/.test(format)) format = format.replace(RegExp.$1,
            (date.getFullYear() + "").substr(4 - RegExp.$1.length));
        for (var k in o)
            if (new RegExp("(" + k + ")").test(format))
                format = format.replace(RegExp.$1,
                    RegExp.$1.length == 1 ? o[k] :
                    ("00" + o[k]).substr(("" + o[k]).length));
        return format;
    }
    return '';

}
export function timeAgo(time) {
    const between = Date.now() / 1000 - Number(time)
    if (between < 3600) {
        return pluralize(~~(between / 60), ' minute')
    } else if (between < 86400) {
        return pluralize(~~(between / 3600), ' hour')
    } else {
        return pluralize(~~(between / 86400), ' day')
    }
}

export function parseTime(time, cFormat) {
    if (arguments.length === 0) {
        return null
    }

    if ((time + '').length === 10) {
        time = +time * 1000
    }

    const format = cFormat || '{y}-{m}-{d} {h}:{i}:{s}'
    let date
    if (typeof time === 'object') {
        date = time
    } else {
        date = new Date(parseInt(time))
    }
    const formatObj = {
        y: date.getFullYear(),
        m: date.getMonth() + 1,
        d: date.getDate(),
        h: date.getHours(),
        i: date.getMinutes(),
        s: date.getSeconds(),
        a: date.getDay()
    }
    const time_str = format.replace(/{(y|m|d|h|i|s|a)+}/g, (result, key) => {
        let value = formatObj[key]
        if (key === 'a') return ['一', '二', '三', '四', '五', '六', '日'][value - 1]
        if (result.length > 0 && value < 10) {
            value = '0' + value
        }
        return value || 0
    })
    return time_str
}

export function formatTime(time, option) {
    time = +time * 1000
    const d = new Date(time)
    const now = Date.now()

    const diff = (now - d) / 1000

    if (diff < 30) {
        return '刚刚'
    } else if (diff < 3600) { // less 1 hour
        return Math.ceil(diff / 60) + '分钟前'
    } else if (diff < 3600 * 24) {
        return Math.ceil(diff / 3600) + '小时前'
    } else if (diff < 3600 * 24 * 2) {
        return '1天前'
    }
    if (option) {
        return parseTime(time, option)
    } else {
        return d.getMonth() + 1 + '月' + d.getDate() + '日' + d.getHours() + '时' + d.getMinutes() + '分'
    }
}

/* 数字 格式化*/
export function nFormatter(num, digits) {
    const si = [
        { value: 1E18, symbol: 'E' },
        { value: 1E15, symbol: 'P' },
        { value: 1E12, symbol: 'T' },
        { value: 1E9, symbol: 'G' },
        { value: 1E6, symbol: 'M' },
        { value: 1E3, symbol: 'k' }
    ]
    for (let i = 0; i < si.length; i++) {
        if (num >= si[i].value) {
            return (num / si[i].value + 0.1).toFixed(digits).replace(/\.0+$|(\.[0-9]*[1-9])0+$/, '$1') + si[i].symbol
        }
    }
    return num.toString()
}

export function html2Text(val) {
    const div = document.createElement('div')
    div.innerHTML = val
    return div.textContent || div.innerText
}

export function toThousandslsFilter(num) {
    return (+num || 0).toString().replace(/^-?\d+/g, m => m.replace(/(?=(?!\b)(\d{3})+$)/g, ','))
}