<?php
/**
 * 时间处理类
 *
 * @author Coeus <r.anerg@gmail.com>
 */

namespace huolib\tool;
class Time {
    /**
     * 计算与现在时间差
     *
     * @param $time
     *
     * @return false|string
     */
    public static function optimization($time) {
        if (!is_numeric($time)) {
            $time = strtotime($time);
        }
        $_now_time = time();
        $d1 = date('d', $time);
        $d2 = date('d', $_now_time);
        $y1 = date('Y', $time);
        $y2 = date('Y', $_now_time);
        $htime = date('H:i', $time);
        $dif = abs($_now_time - $time);
        if ($dif < 10) {
            $return = '刚刚';
        } else if ($dif < 3600) {
            $return = floor($dif / 60).'分钟前';
        } else if ($dif < 10800) {
            $return = floor($dif / 3600).'小时前';
        } else if ($d1 == $d2) {
            $return = '今天 '.$htime;
        } else if ($dif < 86400) {
            $return = '昨天 '.$htime;
        } else if ($dif < 172800) {
            $return = '前天 '.$htime;
        } else if ($y1 == $y2) {
            $return = date('m-d H:i', $time);
        } else {
            $return = date('Y-m-d H:i', $time);
        }

        return $return;
    }

    /**
     * 返回今日开始和结束的时间戳
     *
     * @return array
     */
    public static function today() {
        return [
            mktime(0, 0, 0, date('m'), date('d'), date('Y')),
            mktime(23, 59, 59, date('m'), date('d'), date('Y'))
        ];
    }

    /**
     * 返回昨日开始和结束的时间戳
     *
     * @return array
     */
    public static function yesterday() {
        $yesterday = date('d') - 1;

        return [
            mktime(0, 0, 0, date('m'), $yesterday, date('Y')),
            mktime(23, 59, 59, date('m'), $yesterday, date('Y'))
        ];
    }

    /**
     * 返回本周开始和结束的时间戳
     *
     * @return array
     */
    public static function week() {
        $timestamp = time();

        return [
            strtotime(date('Y-m-d', strtotime("this week Monday", $timestamp))),
            strtotime(date('Y-m-d', strtotime("this week Sunday", $timestamp))) + 24 * 3600 - 1
        ];
    }

    /**
     * 返回最近七天开始和结束的时间戳
     *
     * @return array
     */
    public static function lastSeven() {
        return [
            strtotime(date('Y-m-d', strtotime('-6 days'))),
            mktime(23, 59, 59, date('m'), date('d'), date('Y'))
        ];
    }

    /**
     * 返回上周开始和结束的时间戳
     *
     * @return array
     */
    public static function lastWeek() {
        $timestamp = time();

        return [
            strtotime(date('Y-m-d', strtotime("last week Monday", $timestamp))),
            strtotime(date('Y-m-d', strtotime("last week Sunday", $timestamp))) + 24 * 3600 - 1
        ];
    }

    /**
     * 返回本月开始和结束的时间戳
     *
     * @return array
     */
    public static function month() {
        return [
            mktime(0, 0, 0, date('m'), 1, date('Y')),
            mktime(23, 59, 59, date('m'), date('t'), date('Y'))
        ];
    }

    /**
     * 返回上个月开始和结束的时间戳
     *
     * @return array
     */
    public static function lastMonth() {
        $begin = mktime(0, 0, 0, date('m') - 1, 1, date('Y'));
        $end = mktime(23, 59, 59, date('m') - 1, date('t', $begin), date('Y'));

        return [$begin, $end];
    }

    /**
     * 最近30天开始和结束的时间戳
     *
     * @return array
     */
    public static function lastThirty() {
        $begin = strtotime(date('Y-m-d', strtotime('-30 days')));
        $end = mktime(23, 59, 59, date('m'), date('d'), date('Y'));

        return [$begin, $end];
    }

    /**
     * 返回今年开始和结束的时间戳
     *
     * @return array
     */
    public static function year() {
        return [
            mktime(0, 0, 0, 1, 1, date('Y')),
            mktime(23, 59, 59, 12, 31, date('Y'))
        ];
    }

    /**
     * 返回去年开始和结束的时间戳
     *
     * @return array
     */
    public static function lastYear() {
        $year = date('Y') - 1;

        return [
            mktime(0, 0, 0, 1, 1, $year),
            mktime(23, 59, 59, 12, 31, $year)
        ];
    }

    /***
     * 获得任意一天的开始时间，结束时间
     *
     * @param $date
     *
     * @return array
     */
    public static function day($date) {
        return array(strtotime($date), strtotime($date) + 24 * 3600 - 1);
    }

    public static function dayOf() {
    }

    /**
     * 获取几天前零点到现在/昨日结束的时间戳
     *
     * @param int  $day 天数
     * @param bool $now 返回现在或者昨天结束时间戳
     *
     * @return array
     */
    public static function dayToNow($day = 1, $now = true) {
        $end = time();
        if (!$now) {
            list($foo, $end) = self::yesterday();
        }

        return [
            mktime(0, 0, 0, date('m'), date('d') - $day, date('Y')),
            $end
        ];
    }

    /**
     * 返回几天前的时间戳
     *
     * @param int $day
     *
     * @return int
     */
    public static function daysAgo($day = 1) {
        $nowTime = time();

        return $nowTime - self::daysToSecond($day);
    }

    /**
     * 返回几天后的时间戳
     *
     * @param int $day
     *
     * @return int
     */
    public static function daysAfter($day = 1) {
        $nowTime = time();

        return $nowTime + self::daysToSecond($day);
    }

    /**
     * 天数转换成秒数
     *
     * @param int $day
     *
     * @return int
     */
    public static function daysToSecond($day = 1) {
        return $day * 86400;
    }

    /**
     * 周数转换成秒数
     *
     * @param int $week
     *
     * @return int
     */
    public static function weekToSecond($week = 1) {
        return self::daysToSecond() * 7 * $week;
    }

    /**
     * 时间相差天数
     *
     * @param $start_time
     * @param $end_time
     *
     * @return float
     */
    public static function timeDateDiff($start_time, $end_time) {
        $_start_time = strtotime(date('Y-m-d', $start_time));
        $_end_time = strtotime(date('Y-m-d', $end_time));

        return round(abs($_end_time - $_start_time) / 86400);
    }
}