#!/bin/bash
# This script counts down the time to March 1, 2013. This is the month Ouya is supposed to be released to Kickstarter backers.
# Press ^C to quit.
# Date format yyyy-mm-dd
#


# $release and $now variables.
# They represent the number of seconds since 1970-01-01 00:00:00 UTC,
# for present time and release date respectively.
now=$(date "+%s")
release=$(date --date="2013-03-01" "+%s")

function tleft {

	# Check the current date/time and compare with release date.
	now=$(date "+%s")
	diff=$(( release - now ))

	# This for loop takes care of dividing the total number of seconds into days, hours, minutes and seconds.
	for t in d h m s; do
		case $t in
			'd')
				n=86400
				d=$(( diff / n ))
				printf 'days:\t%12ds\n' $(( d * n ))
			;;
			'h')
				n=3600
				h=$(( diff / n ))
				printf 'hrs:\t%12ds\n' $(( h * n ))
			;;
			'm')
				n=60
				m=$(( diff / n ))
				printf 'min:\t%12ds\n' $(( m * n ))
			;;
			's')
				s=$diff
				printf 'sec:\t%12ds\n' $s
			;;
		esac

		# Sets the diff to the remainder after each run of the loop.
		diff=$(( diff % n ))
	done

	# Prints out the time left.
	printf '\n%s days, %02d:%02d:%02d left\n' $d $h $m $s
}

# Quit if the current date is greater than the release date.
if [[ $now -ge $release ]]; then
	echo "OUYA! It's released any time now!"
	exit
else
	# While the current date is less than the release date, check the time left once every 0.5 seconds.
	while [[ $now -lt $release ]]; do
		clear
		tleft
		sleep 0.5
	done

	echo "OUYA! It's released any time now!"
	exit
fi