-- Battery widget

local awful = require("awful")
local gears = require("gears")
local wibox = require("wibox")

local timer = gears.timer or timer
local watch = awful.spawn and awful.spawn.with_line_callback

------------------------------------------
-- Private utility functions
------------------------------------------

------------------------------------------
-- Battery widget interface
------------------------------------------

local clipdate_widget= {}

function clipdate_widget:new(args)
    return setmetatable({}, {__index = self}):init(args)
end

function clipdate_widget:init(args)
    self.widget = wibox.widget.textbox()
    self.widget.set_align("right")
    self.tooltip = awful.tooltip({objects={self.widget}})

    self.widget:buttons(awful.util.table.join(
        awful.button({ }, 1, function() self:update() end),
        awful.button({ }, 3, function() self:update() end)
    ))

    self.timer = timer({ timeout = 1 })
    self.timer:connect_signal("timeout", function() self:update() end)
    self.timer:start()
    self:update()

    awesome.connect_signal("exit", function()
        awesome.kill(self.listener, 9)
    end)

    return self
end

function run(cmd)
  local f = io.popen(cmd,'r')
  local s = f:read('*a')
  f:close()
  return s
end

function getDate(cmd)
  local clipboard = run(cmd)
  local match = string.match(clipboard,'^%d%d%d%d%d%d%d%d%d%d%d%d%d$')
  if ( match == nil ) then
    return nil
  else
    local ms = tonumber(match)
    local s = math.floor((ms+500)/1000)
    return os.date("%Y-%m-%d %H:%M:%S",s)
  end
end

function clipdate_widget:update()
    local text = ""
    local tooltip = ""

    local s = getDate("xsel -o")
    if ( s == nil ) then
      s = getDate("xsel -o -b")
    end
    if ( s == nil ) then
    else
      text = "["..s.."]"
      tooltip = s
    end

    self.widget:set_markup(text)
    self.tooltip:set_text(tooltip)
end

return setmetatable(clipdate_widget, {
    __call = clipdate_widget.new,
})