local BasePowerD = require("ui/device/basepowerd")
-- liblipclua, see require below

local KindlePowerD = BasePowerD:new{
	fl_min = 0, fl_max = 24,
	kpw1_frontlight = "/sys/devices/system/fl_tps6116x/fl_tps6116x0/fl_intensity",
	kpw2_frontlight = "/sys/class/backlight/max77696-bl/brightness",
	kt_kpw_capacity = "/sys/devices/system/yoshi_battery/yoshi_battery0/battery_capacity",
	kpw_charging = "/sys/devices/platform/aplite_charger.0/charging",
	kt_charging = "/sys/devices/platform/fsl-usb2-udc/charging",
	
	flIntensity = nil,
	battCapacity = nil,
	is_charging = nil,
	lipc_handle = nil,
}

function KindlePowerD:new(o)
	local o = o or {}
	setmetatable(o, self)
	self.__index = self
	if o.init then o:init(o.model) end
	return o
end

function KindlePowerD:init(model)
	local lipc = require("liblipclua")
	if lipc then
		self.lipc_handle = lipc.init("com.github.koreader")
	end
	
	if model == "KindleTouch" then
		self.batt_capacity_file = self.kt_kpw_capacity
		self.is_charging_file = self.kt_charging
	elseif model == "KindlePaperWhite" then
		self.fl_intensity_file = self.kpw1_frontlight
		self.batt_capacity_file = self.kt_kpw_capacity
		self.is_charging_file = self.kpw_charging
	elseif model == "KindlePaperWhite2" then
		self.fl_intensity_file = self.kpw2_frontlight
		self.batt_capacity_file = self.kt_kpw_capacity
		self.is_charging_file = self.kpw_charging
	end
	if self.lipc_handle then
		self.flIntensity = self.lipc_handle:get_int_property("com.lab126.powerd", "flIntensity")
	else
		self.flIntensity = self:read_int_file(self.fl_intensity_file)
	end
end

function KindlePowerD:toggleFrontlight()
	local sysint = self:read_int_file(self.fl_intensity_file)
	if sysint == 0 then
		self:setIntensity(self.flIntensity)
	else
		os.execute("echo -n 0 > " .. self.fl_intensity_file)
	end
end

function KindlePowerD:setIntensityHW()
	if self.lipc_handle ~= nil then
		self.lipc_handle:set_int_property("com.lab126.powerd", "flIntensity", self.flIntensity)
	else
		os.execute("echo -n ".. self.flIntensity .." > " .. self.fl_intensity_file)
	end
end

function KindlePowerD:getCapacityHW()
	if self.lipc_handle ~= nil then
		self.battCapacity = self.lipc_handle:get_int_property("com.lab126.powerd", "battLevel")
	else
		self.battCapacity = self:read_int_file(self.batt_capacity_file)
	end
	return self.battCapacity
end

function KindlePowerD:isChargingHW()
	if self.lipc_handle ~= nil then
		self.is_charging = self.lipc_handle:get_int_property("com.lab126.powerd", "isCharging")
	else
		self.is_charging = self:read_int_file(self.is_charging_file)
	end
	return self.is_charging == 1
end

return KindlePowerD