-----------------------------
-- Levak ©2011 --------------
-- http://levak.free.fr/ ----
-- levak92@gmail.com --------
-----------------------------

------ Menu

Menu = class(Screen)
Menu.__index = Menu

function Menu.create(items)
	local menu = class(Screen)
	setmetatable(menu, Menu)
	menu.items = items
	menu.depth = 1
	--format(menu.items)
	menu.selectedIndex = 1
	return menu
end

function Menu:format()
	local max = 0

	platform.gc():setFont("sansserif", "r", fxxsmall)
	
	-- Get the maximum width
	for i, button in ipairs(self.items) do
		button.text = tostring(i)..":"..button.text
		if platform.gc():getStringWidth(button.text) + button.h + 5 + 10 > max then
			max = platform.gc():getStringWidth(button.text) + button.h + 10 + (button.h+normal)/3
		end
	end

	local firstX = self.items[1].x
	local firstY = self.items[1].y
	for i, button in ipairs(self.items) do
		button.y = firstY + 2*i*xxsmall
		button.x = firstX
		button.w = max
		if button.child then
			if #button.child.items < 1 then
				button.child.items[1] = Button.create(0, 0, 0, 1.5, normal, function() end, "No saved game found", warningButton)
			end
			button.child.items[1].x = button.x + button.w + button.s
			button.child.items[1].y = button.y - button.h - button.s
			button.child.depth = self.depth + 1
			button.child:format()
		end
	end
end

function Menu:paint(gc)
	for i,button in ipairs(self.items) do
		button:paint(gc, i == self.selectedIndex)
	end
end

function Menu:charIn(ch)
	if ch >= "1" and ch <= "9" then
		if self.items[tonumber(ch)] then
			self.selectedIndex = tonumber(ch)
			self:enterKey()
		end
	end
	platform.window:invalidate()
end

function Menu:enterKey()
	if self.items[self.selectedIndex].child then
		local submenu = self.items[self.selectedIndex].child
		PushScreen(submenu)
	else
		print(self.depth)
		for i = 1, self.depth do
			PullScreen()
		end
		self.items[self.selectedIndex].fun()
	end
end

function Menu:escapeKey()
	PullScreen()
end

function Menu:arrowKey(key)
	if key == "up" then
		self.selectedIndex = self.selectedIndex - 1
		if self.selectedIndex < 1 then
			self.selectedIndex = #self.items
		end
	elseif key == "down" then
		self.selectedIndex = self.selectedIndex + 1
		if self.selectedIndex > #self.items then
			self.selectedIndex = 1
		end
	elseif key == "left" then
		self:escapeKey()
	elseif key == "right" then
		if self.items[self.selectedIndex].child then
			local submenu = self.items[self.selectedIndex].child
			PushScreen(submenu)
		end
	end
	platform.window:invalidate()
end

function Menu:mouseDown(x, y)
	for i, button in ipairs(self.items) do
		if button:isActive(x, y) then
			self.selectedIndex = i
			self:enterKey()
		end
	end
	platform.window:invalidate()
end

-- non used events
function Menu:tabKey() end
function Menu:backtabKey() end
function Menu:contextMenu() end
function Menu:help() end
function Menu:mouseUp() end