local awful = require "awful"
local wibox = require("wibox")
local gears = require("gears")
local beautiful = require("beautiful")
local longpress = require("awesome-longpress")
local powermenu = {
 buttonsize = 128,
 spacing = 5,
 iconPath = gears.filesystem.get_configuration_dir() .. "/awesome-powermenu/",
 lock = function()
  error("Lock requested, but no function specified")
 end,
 suspend = function()
  error("Suspend requested, but no function specified")
 end,
 logout = function()
  error("Logout requested, but no function specified")
 end,
 poweroff = function()
  error("Power off requested, but no function specified")
 end,
 reboot = function()
  error("Reboot requested, but no function specified")
 end,
 fullscreen = function(self)
  self.screen.navbar.visible = not self.screen.navbar.visible
 end,
 rotateLeft = function(self)
  for k,v in pairs(self.screen.outputs) do
   awful.spawn(gears.filesystem.get_configuration_dir() .. "/awesome-powermenu/rotate.lua left " .. tostring(k))
  end
  awesome.restart()
 end,
 rotateRight = function(self)
  for k,v in pairs(self.screen.outputs) do
   awful.spawn(gears.filesystem.get_configuration_dir() .. "/awesome-powermenu/rotate.lua right " .. tostring(k))
  end
  awesome.restart()
 end,
 brightnessUp = function()
  awful.spawn.easy_async_with_shell("ls /sys/class/backlight/",function(stdout,stderr,_,_)
   local devices = {}
   for line in stdout:gmatch("%S+") do
    local f = io.open(string.format("/sys/class/backlight/%s/brightness",line),"rb")
    if not f then error("wtf") end
    local brightness = tonumber(f:read("*a"))
    f:close()
    local f = io.open(string.format("/sys/class/backlight/%s/max_brightness",line),"rb")
    local max_brightness = tonumber(f:read("*a"))
    f:close()
    devices[line]={["brightness"]=brightness,["max_brightness"]=max_brightness}
   end
   for k,v in pairs(devices) do
    v.stepsize = math.floor(v.max_brightness / 10)
    v.currentstep = math.floor(v.brightness / v.stepsize)
    local f = io.open(string.format("/sys/class/backlight/%s/brightness",k),"wb")
    f:write(v.stepsize * math.min(10,(v.currentstep+1)))
    f:close()
   end
  end)
 end,
 brightnessDown = function()
  awful.spawn.easy_async_with_shell("ls /sys/class/backlight/",function(stdout,stderr,_,_)
   local devices = {}
   for line in stdout:gmatch("%S+") do
    local f = io.open(string.format("/sys/class/backlight/%s/brightness",line),"rb")
    if not f then error("wtf") end
    local brightness = tonumber(f:read("*a"))
    f:close()
    local f = io.open(string.format("/sys/class/backlight/%s/max_brightness",line),"rb")
    local max_brightness = tonumber(f:read("*a"))
    f:close()
    devices[line]={["brightness"]=brightness,["max_brightness"]=max_brightness}
   end
   for k,v in pairs(devices) do
    v.stepsize = math.floor(v.max_brightness / 10)
    v.currentstep = math.floor(v.brightness / v.stepsize)
    local f = io.open(string.format("/sys/class/backlight/%s/brightness",k),"wb")
    f:write(v.stepsize * math.max(1,(v.currentstep-1)))
    f:close()
   end
  end)
 end
}

function powermenu.new(s)
 local powermenuWidget = wibox.widget{
   layout = wibox.layout.grid.vertical(3),
   spacing = powermenu.spacing,
 }
 local powermenuPopup = awful.popup{
   layout = wibox.layout.fixed.vertical,
   widget = powermenuWidget,
   border_color = beautiful.border_focus,
   border_width = 2,
   ontop        = true,
   placement    = awful.placement.centered,
   screen = s,
   visible = false,
 }
 local function addButton(icon, fn, lfn, hide)
  if hide == nil then hide = true end
  local newButton = awful.widget.button{
   image = powermenu.iconPath .. "/" .. icon,
  }
  newButton:set_forced_width(powermenu.buttonsize)
  newButton:set_forced_height(powermenu.buttonsize)
  longpress.add(newButton,
   function()
    fn(powermenuPopup)
    if hide then
     powermenuPopup:hide()
    end
   end,
   function()
    lfn(powermenuPopup)
    if hide then
     powermenuPopup:hide()
    end
   end
  )

  powermenuWidget:add(newButton)
 end
 addButton("system-log-out.svg", powermenu.logout, powermenu.poweroff)
 addButton("system-lock-screen.svg", powermenu.lock)
 addButton("system-reboot.svg", awesome.restart, powermenu.reboot)
 addButton("object-rotate-left.svg", powermenu.rotateLeft)
 addButton("system-suspend.svg", powermenu.suspend)
 addButton("object-rotate-right.svg", powermenu.rotateRight)
 addButton("brightness-up.svg", powermenu.brightnessUp, nil, false)
 addButton("view-fullscreen.svg", powermenu.fullscreen)
 addButton("brightness-down.svg", powermenu.brightnessDown, nil, false)

 function powermenuPopup.show(self)
  self.visible = true
 end
 function powermenuPopup.hide(self)
  self.visible = false
 end
 function powermenuPopup.toggle(self)
  self.visible = not self.visible
 end
 return powermenuPopup
end

return powermenu