/**
 * Created by PanJiaChen on 16/11/18.
 */

/**
 * Parse the time to string
 * @param {(Object|string|number)} time
 * @param {string} cFormat
 * @returns {string | null}
 */
export function parseTime(time, cFormat) {
    if (arguments.length === 0 || !time) {
        return null
    }
    const format = cFormat || '{y}-{m}-{d} {h}:{i}:{s}'
    let date
    if (typeof time === 'object') {
        date = time
    } else {
        if ((typeof time === 'string')) {
            if ((/^[0-9]+$/.test(time))) {
                // support "1548221490638"
                time = parseInt(time)
            } else {
                // support safari
                // https://stackoverflow.com/questions/4310953/invalid-date-in-safari
                time = time.replace(new RegExp(/-/gm), '/')
            }
        }

        if ((typeof time === 'number') && (time.toString().length === 10)) {
            time = time * 1000
        }
        date = new Date(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(/{([ymdhisa])+}/g, (result, key) => {
        const value = formatObj[key]
            // Note: getDay() returns 0 on Sunday
        if (key === 'a') { return ['日', '一', '二', '三', '四', '五', '六'][value] }
        return value.toString().padStart(2, '0')
    })
    return time_str
}

/**
 * @param {number} time
 * @param {string} option
 * @returns {string}
 */
export function formatTime(time, option) {
    if (('' + time).length === 10) {
        time = parseInt(time) * 1000
    } else {
        time = +time
    }
    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'
        )
    }
}

/**
 * @param {string} url
 * @returns {Object}
 */
export function param2Obj(url) {
    const search = decodeURIComponent(url.split('?')[1]).replace(/\+/g, ' ')
    if (!search) {
        return {}
    }
    const obj = {}
    const searchArr = search.split('&')
    searchArr.forEach(v => {
        const index = v.indexOf('=')
        if (index !== -1) {
            const name = v.substring(0, index)
            const val = v.substring(index + 1, v.length)
            obj[name] = val
        }
    })
    return obj
}





/**
 * @param {Function} func
 * @param {number} wait
 * @param {boolean} immediate
 * @return {*}
 */
export function debounce(func, wait, immediate) {
    let timeout, args, context, timestamp, result

    const later = function() {
        // 据上一次触发时间间隔
        const last = +new Date() - timestamp

        // 上次被包装函数被调用时间间隔 last 小于设定时间间隔 wait
        if (last < wait && last > 0) {
            timeout = setTimeout(later, wait - last)
        } else {
            timeout = null
                // 如果设定为immediate===true，因为开始边界已经调用过了此处无需调用
            if (!immediate) {
                result = func.apply(context, args)
                if (!timeout) context = args = null
            }
        }
    }

    return function(...args) {
        context = this
        timestamp = +new Date()
        const callNow = immediate && !timeout
            // 如果延时不存在，重新设定延时
        if (!timeout) timeout = setTimeout(later, wait)
        if (callNow) {
            result = func.apply(context, args)
            context = args = null
        }

        return result
    }
}


//时间格式化 2021-01-21T05:53:00.000+0000
export function renderTime(date) {

    var dateee = new Date(date).toJSON();
    return new Date(+new Date(dateee) + 8 * 3600 * 1000)
        .toISOString()
        .replace(/T/g, " ")
        .replace(/\.[\d]{3}Z/, "");

}