local P = {}
P.__index = P

function P:set_value(value)
	-- Set widget value. (0 - 100)
	self.progressbar.value = value

	if value > 60 then
		self.progressbar.color = beautiful.color.battery.good
	elseif value > 40 then
		self.progressbar.color = beautiful.color.battery.low
	elseif value <= 40 then
		self.progressbar.color = beautiful.color.battery.danger
	end

	if (self.state == "discharging") then
		self.rotator.direction = "east"
	else
		self.rotator.direction = "west"
	end

	if (self.state == "charging") and (value > 90) then
		self.progressbar.border_color = beautiful.color.battery.good
	elseif (self.state == "discharging") and (value <= 25) then
		self.progressbar.border_color = beautiful.color.battery.danger
	else
		self.progressbar.border_color = beautiful.color.bar.active
	end

end

function P:set_state(state)
	if (state == "discharging") then
		self.state = "discharging"
	elseif (state == "charging") then
		self.state = "charging"
	elseif (state == "error") then
		self.state = "error"
	else
		error("Invalid state " .. state)
	end
end

function P:set_tooltip(text)
	-- Set widget value. (0 - 100)
	self.tooltip.text = text
end

function P:new()
	local widget = {
		state = "error"
	}
	setmetatable(widget, self)

	widget.progressbar = wibox.widget {
		max_value = 100,
		widget = wibox.widget.progressbar,
		paddings = beautiful.dpi(2),
		color = beautiful.color.bar.active,
		background_color = beautiful.color.transparent,
		border_color = beautiful.color.bar.active,
		border_width = beautiful.dpi(1),
		margins = beautiful.dpi(3)
	}

	widget.rotator = wibox.widget {
		widget.progressbar,
		forced_width = beautiful.dpi(15),
		direction = "east",
		layout = wibox.container.rotate,
	}

	widget.widget = wibox.widget {
		{
			{   -- Right space
				widget = wibox.widget.separator,
				color = beautiful.color.transparent,
				forced_width = beautiful.dpi(3)
			},
			{
				widget.rotator,
				top = beautiful.dpi(2),
				bottom = beautiful.dpi(2),
				layout = wibox.container.margin,
			},
			{   -- Left space
				widget = wibox.widget.separator,
				color = beautiful.color.transparent,
				forced_width = beautiful.dpi(3)
			},

			layout = wibox.layout.align.horizontal,
		},
		layout = wibox.container.background,
	}

	widget.tooltip = awful.tooltip {
		objects = { widget.widget },
		text = ""
	}

	widget.widget:connect_signal("mouse::enter", function(result)
		widget.widget.bg = beautiful.color.bar.hover_bg
	end)

	widget.widget:connect_signal("mouse::leave", function(result)
		widget.widget.bg = beautiful.color.transparent
	end)

	return widget
end

return P