// Copyright 2019 github.com. All rights reserved.
// Use of this source code is governed by github.com.

package util

import (
	"time"
)

// IsToday 是否为今天, ts：秒时间戳
func IsToday(ts int64) bool {
	that := time.Unix(ts, 0)
	now := time.Now()

	if that.Year() == now.Year() && that.Month() == now.Month() && that.Day() == now.Day() {
		return true
	}
	return false
}

// DayInternal 计算两个时间间隔的自然天数
//  输入：begin、end 为开始与截止的时间戳
//  返回：自然天数，2001-01-01 23:23:59 与 2001-01-02 00:00:00 间隔为1天
func DayInternal(begin, end int64) int {
	if end <= begin {
		return 0
	}

	bt := time.Unix(begin, 0)
	et := time.Unix(end, 0)

	bt = time.Date(bt.Year(), bt.Month(), bt.Day(), 0, 0, 0, 0, time.Local)
	et = time.Date(et.Year(), et.Month(), et.Day(), 0, 0, 0, 0, time.Local)

	return int(et.Sub(bt).Hours() / 24)
}

// DayBeginInfo 一天的开始时间信息
//  输入：ts 为输入的时间信息
//  返回：978278410 => 978278400, 2001-01-01
func DayBeginTimestamp(ts int64) (int64, string) {
	if ts < 0 {
		return 0, ""
	}

	t := time.Unix(ts, 0)
	t = time.Date(t.Year(), t.Month(), t.Day(), 0, 0, 0, 0, time.Local)

	return t.Unix(), t.Format("2006-01-02")
}