#!/usr/bin/ruby
# '7/1 1:20'

$h = $m = $s = $j = $mm = $a = nil

def try_hour(s)
	case s
	when /^(\d+):(\d+):(\d+)$/
		$h, $m, $s = $1.to_i, $2.to_i, $3.to_i
	when /^(\d+)[:h](\d+)$/
		$h, $m, $s = $1.to_i, $2.to_i, 0
	when /^(\d+)h$/
		$h, $m, $s = $1.to_i, 0, 0
	end
end

def try_date(s)
	case s
	when /^(\d+)\/(\d+)\/(\d+)$/
		$j, $mm, $a = $1.to_i, $2.to_i, $3.to_i
	when /^(\d+)\/(\d+)$/
		$j, $mm, $a = $1.to_i, $2.to_i, Time.now.year
	when /^(\d+)$/
		$j, $mm, $a = $1.to_i, Time.now.month, Time.now.year
	end
end

if try_date(ARGV[0])
	try_hour(ARGV[1])
else
	try_date(ARGV[1])
	try_hour(ARGV[0])
end

raise "invalid date" unless $h

if not $j
	$j, $mm, $a = Time.now.day, Time.now.month, Time.now.year
	wakedate = Time.mktime($a, $mm, $j, $h, $m, $s)
	if wakedate < Time.now
		wakedate += 24*3600
	end
else
	wakedate = Time.mktime($a, $mm, $j, $h, $m, $s)
end

delay = wakedate.to_i - Time.now.to_i

puts "sleeping #{delay/3600}h#{delay/60%60} til #{wakedate.strftime('%d/%m %H:%M')}"
sleep delay