class ChaMenu < UIView
	attr_accessor :delegate, :data, :selected_index, :scroll_view
	attr_accessor :font_size, :normal_color, :selected_color, :highlight_color
	attr_accessor :background_color
	attr_accessor :selected_index

	def setup
		self.autoresizingMask = UIViewAutoresizingFlexibleWidth
		@font_size ||= 16
		@normal_color 	||= UIColor.blackColor
		@highlight_color||= UIColor.grayColor
		@selected_color ||= UIColor.blueColor
		@selected_index ||= 0
		@scroll_view = UIScrollView.alloc.initWithFrame(self.bounds)
		@scroll_view.backgroundColor  = @background_color || UIColor.whiteColor
		@scroll_view.autoresizingMask = UIViewAutoresizingFlexibleWidth
		@scroll_view.showsVerticalScrollIndicator 	= false
		@scroll_view.showsHorizontalScrollIndicator = false
		@scroll_view.delegate = self

		self.addSubview @scroll_view
		reload_data
	end

	def set_select_index(index)
		return if @selected_index == index
		@selected_index = index
	end

	def reload_data
		@scroll_view.subviews.each {|v| v.removeFromSuperview }
		
		x = 0
		padding = 10

		selected_frame = [[0,0], [0,0]]
		@data.each_with_index do |text, index|
			x += padding
			font 	= UIFont.systemFontOfSize(@font_size)
			size 	= text.sizeWithFont(font, constrainedToSize:[10000, 300], lineBreakMode:NSLineBreakByCharWrapping)
    		frame 	= [[x, padding], [size.width, size.height]]
    		selected_frame = frame if index == @selected_index
    		@scroll_view.addSubview menu_button(text, index, frame)
    		x += size.width
    	end

    	content_width = x + padding
		@scroll_view.setContentSize([content_width, @scroll_view.frame.size.height])
		if @selected_index > 0
			@scroll_view.scrollRectToVisibleCenteredOn(selected_frame, animated:false)
		end
    end
			
	def menu_button(text, index, frame)
		button = UIButton.alloc.initWithFrame(frame)
		button.titleLabel.textAlignment = UITextAlignmentCenter
		button.titleLabel.font 		 	= UIFont.systemFontOfSize(@font_size) 
		button.setTitle(text, forState:UIControlStateNormal)
		if index == @selected_index
			button.setTitleColor(@selected_color, forState:UIControlStateNormal)
		else
			button.setTitleColor(@normal_color, forState:UIControlStateNormal)
		end
		button.setTitleColor(@highlight_color, forState:UIControlStateHighlighted)
		#button.setTitleColor(@selected_color, forState:UIControlStateSelected)
		button.addTarget(self, action: 'menu_select:', forControlEvents:UIControlEventTouchUpInside)
		button.tag = index
		button
	end

	def menu_select(sender)
    	UIView.animateWithDuration(0.2, delay:0, options:UIViewAnimationOptionCurveLinear, animations: -> {
    		@scroll_view.scrollRectToVisibleCenteredOn(sender.frame, animated:false)
    	}, completion:nil)

    	@selected_index = sender.tag
    	reload_data
    	if @delegate.respond_to?(:selected_menu)
    		@delegate.selected_menu(@selected_index)
    	else
    		NSLog("Warning: Did not find selected_menu method.")
    	end
    end

    def delegate=(parent)
    	@delegate = WeakRef.new(parent)
    end

	def scrollViewDidScroll(scrollView)

	end

end