TimeManager = {}

do
	function TimeManager:new(o)
		local o = o or {}
		setmetatable(o, self)
		self.__index = self
		return o
	end

	function TimeManager:setTime(t)
		if type(t) == 'table' then
			self._selftime = (t[1] or 0) + (t[2] or 0) * 60 + (t[3] or 0) * 60 * 24
		elseif type(t) == 'number' then
			self._selftime = t
		else
			error('Wrong parameter!')
		end
		
		return self
	end

	function TimeManager:asNumber()
		return self._selftime
	end
	
	function TimeManager:asAcademicNumber()
		return self._selftime / 0.75
	end

	function TimeManager:asTime()
		local tbl = {}
		
		tbl[1] = math.floor(self._selftime % 60)
		tbl[2] = math.floor(self._selftime / 60) % 24
		tbl[3] = math.floor(math.floor(self._selftime / 60) / 24)
		
		return tbl
	end

	function TimeManager:toStringFull()
		local tbl = self:asTime()
		d = tostring(tbl[3])
		h = tostring(tbl[2])
		m = tostring(tbl[1])
		return form(d) .. ':' .. form(h) .. ':' .. form(m)
	end
	
	function TimeManager:toString()
		local tbl = self:asTime()
		h = tostring(tbl[2])
		m = tostring(tbl[1])
		return form(h) .. ':' .. form(m)
	end

	function TimeManager:addTime(t)
		local mins = 0
		if type(t) == 'table' then
			mins = ((TimeManager:new()):setTime(t)):asNumber()
		elseif type(t) == 'number' then
			mins = t
		else
			error('Wrong parameter!')
		end
		
		self._selftime = self._selftime + mins
	end

	function TimeManager.__lt(op1, op2)
		if tostring(op1) == 'TimeManager' and tostring(op2) == 'TimeManager' then
			return op1._selftime < op2._selftime
		elseif tostring(op1) == 'TimeManager' and type(op2) == 'number' then
			return op1._selftime < op2
		end
		
		return false
	end
	
	function TimeManager.__gt(op1, op2)
		if tostring(op1) == 'TimeManager' and tostring(op2) == 'TimeManager' then
			return op1._selftime > op2._selftime
		elseif tostring(op1) == 'TimeManager' and type(op2) == 'number' then
			return op1._selftime > op2
		end
		
		return false
	end

	function TimeManager.__add(op1, op2)
		local res = TimeManager:new()
		if tostring(op1) == 'TimeManager' and tostring(op2) == 'TimeManager' then
			res:setTime(op1:asNumber() + op2:asNumber())
		elseif tostring(op1) == 'TimeManager' and type(op2) == 'number' then
			res:setTime(op1:asNumber() + op2)
		else
			error('Wrong operands')
		end
		
		return res
	end
	
	function TimeManager.__sub(op1, op2)
		local res = TimeManager:new()
		if tostring(op1) == 'TimeManager' and tostring(op2) == 'TimeManager' then
			res:setTime(op1:asNumber() - op2:asNumber())
		elseif tostring(op1) == 'TimeManager' and type(op2) == 'number' then
			res:setTime(op1:asNumber() - op2)
		else
			error('Wrong operands')
		end
		
		return res
	end

	function TimeManager.__tostring()
		return "TimeManager"
	end

	function form(str)
		return ((#str == 0) and '00' or ((#str == 1) and '0' or '')) .. str
	end

	function createManager(t)
		local mng = TimeManager:new()
		mng:setTime(t)
		return mng
	end
	
	function timeToMin(t)
		local mng = TimeManager:new()
		mng:setTime(t)
		return mng:asNumber()
	end

	function minToTime(t)
		local mng = TimeManager:new()
		mng:setTime(t)
		return mng:asTime()
	end

	function mtToString(t)
		local mng = TimeManager:new()
		mng:setTime(t)
		return mng:toString()
	end
end

course = {
	{"Brief", 							15},
	{"Java Technology", 				15},
	{"NetBeans Development + Exercise",	30},
	{"Java Specials", 					5 },
	{"Primitive types and literals", 	15},
	{"Variables", 						15},
	{"------------Exercise",			30},
	{"Operations", 						10},
	{"java.lang", 						10},
	{"------------Exercise",			30},
	{"Strings", 						10},
	{"Arrays", 							15},
	{"------------Exercise",			30},
	{"Input/Output", 					15},
	{"Branching", 						15},
	{"Cycles", 							15},
	{"------------Exercise",			30},
	{"Methods", 						15},
	{"Reference Types", 				5 },
	{"------------Exercise",			30},
	{"Class", 							15},
	{"------------Exercise",			30},
	{"Encapsulation", 					10},
	{"Static Members", 					10},
	{"Enumerations", 					10},
	{"------------Exercise",			60},
	{"Packages", 						15},
	{"Inheritance", 					15},
	{"Polymorphism", 					15},
	{"------------Exercise", 			60},
	{"Interfaces", 						15},
	{"Abstract classes", 				10},
	{"------------Exercise", 			60},
	{"Nested classes", 					10},
	{"Exceptions", 						10},
	{"Collections", 					10},
	{"------------Exercise",			60}
}

manager = TimeManager:new()
hours = timeToMin({0, 4});
cof_each = timeToMin({0, 2});
cof_max = 1
cof_time = 15;
start_time = timeToMin({0, 10})
delta_time = 0

do
	local last_break = start_time
	local cof_count = 0
	local time_count = 0
	local day_count = 1
	
	manager:setTime(start_time)
	print('---------' .. '[Day' .. day_count .. ']' .. '---------')
	for _, v in pairs(course) do
		if ((manager + (v[2] + (v[3] or 0) - delta_time)) - start_time):asNumber() > hours then
			time_count = time_count + manager:asNumber() - start_time
			manager:setTime(start_time)
			cof_count = 0
			last_break = start_time
			
			--add new day separator
			day_count = day_count + 1
			print('---------' .. '[Day' .. day_count .. ']' .. '---------')
			
			--add new day brief
			print(manager:toString() .. " - " .. (manager + 10):toString() .. " " .. "New day Brief")
			manager:addTime(10)
		end
	
		if (manager:asNumber() + v[2]) > last_break + cof_each and cof_count < cof_max then
			print(manager:toString() .. " - " .. (manager + cof_time):toString() .. " " .. "Coffe break")
			manager:addTime(cof_time)
			last_break = manager:asNumber()
			cof_count = cof_count + 1
		end
		
		if #v == 2 then
			print(manager:toString() .. " - " .. (manager + v[2]):toString() .. " " .. v[1])
			manager:addTime(v[2])
		elseif #v == 3 then --for a case when table have additional exercise time
			print(manager:toString() .. " - " .. (manager + v[2]):toString() .. " " .. v[1])
			manager:addTime(v[2])
			
			print(manager:toString() .. " – " .. (manager + v[3]):toString() .. " Exercise " .. v[1])
			manager:addTime(v[3])
		end
	end
	time_count = time_count + manager:asNumber() - start_time
	print("Total hours: " .. mtToString(time_count))
end