const months = [

"January",

"February",

"March",

"April",

"May",

"June",

"July",

"August",

"September",

"October",

"November",

"December",

];

const weekdays = [

"Sunday",

"Monday",

"Tuesday",

"Wednesday",

"Thursday",

"Friday",

"Saturday",

];

const giveaway=document.querySelector('.giveaway')

const deadline=document.querySelector('.deadline')

const items=document.querySelectorAll('.deadline-format h4')

let tempDate = new Date();

let tempYear = tempDate.getFullYear();

let tempMonth = tempDate.getMonth();

let tempDay = tempDate.getDate();

// months are ZERO index based;

const futureDate = new Date(tempYear, tempMonth, tempDay + 10, 11, 30, 0);

// const futureDate=new Date(2021, 0, 15, 10, 5, 0)

const year=futureDate.getFullYear()

let month=futureDate.getMonth()

month=months[month]

const day=futureDate.getDate()

const weekday=weekdays[futureDate.getDay()]

const hours=futureDate.getHours()

const minutes=futureDate.getMinutes()

giveaway.textContent=`giveaway end on ${weekday}, ${day} ${month} ${year}, ${hours}:${minutes < 10 ? '0' : ''}${minutes}am`

function getRemainingTime(){

const today=new Date().getTime()

const t= futureDate- today

// 1s = 1000ms

// 1m = 60s

// 1h = 60m

// 1d = 24h

// values in ms

const oneDay = 24*60*60*1000

const oneHour = 60*60*1000

const oneMinutes = 60*1000

//calculate all values

let days = Math.floor(t / oneDay)

let hours = Math.floor((t % oneDay) / oneHour)

let minutes = Math.floor((t % oneHour) / oneMinutes)

let seconds = Math.floor((t % oneMinutes) / 1000)

// set values to array

const values=[days, hours, minutes, seconds]

function format(item){

if(item < 10){

return (item = `0${item}`)

}

return item

}

items.forEach((item, index)=>{

item.innerHTML=format(values[index])

})

document.title=`${values[0]}Days, ${values[1]}Hours, ${values[2]}Minutes, ${values[3]}Seconds`

if(t < 0){

clearInterval(coundown)

deadline.innerHTML=`<h4 class="expired"> Sorry this giveaway has expired </h4>`

document.title="Sorry this giveaway has expired"

}

}

let coundown=setInterval(getRemainingTime, 1000)

getRemainingTime()