local mpc = require("widgets/mpc")
local textbox = require("wibox.widget.textbox")
local gears = require("gears")
local awful = require("awful")
local naughty = require("naughty")
local timer = require("gears.timer")

--TODO remove
local dbg = require("gears.debug")

mpd_widget = textbox()

local function update_widget()
    local text = ""
    if state == "pause" then
        text = "|| "
    end
    text = text .. tostring(artist or "") .. " - " .. tostring(title or "")
    mpd_widget.text = text
end

local connection
local function error_handler(err)
    mpd_widget:set_text("Error: " .. tostring(err))
    timer.start_new(10, function()
        connection:send("ping")
    end)
end

connection = mpc.new(nil, nil, nil, error_handler,
    "status", function(_, result)
        state = result.state
    end,
    "currentsong", function(_, result)
        title, artist, file = result.title, result.artist, result.file
        pcall(update_widget)
    end
)

mpd_widget:buttons(gears.table.join(
  awful.button({}, 1, function() connection:toggle_play() end)
, awful.button({}, 4, function() connection:change_volume(5) end)
, awful.button({}, 5, function() connection:change_volume(-5) end))
)

local function sec_to_min(sec)
    m, s = math.modf((sec or 0.0) / 60)
    return string.format('%d:%02d', m, math.floor(s * 60))
end

local function song_duration(elapsed, duration)
    return sec_to_min(elapsed) .. "/" .. sec_to_min(duration)
end

local function get_info(callback)
    local status = nil
    connection:send("status", function(_, s) status = s end)

    local song = nil
    connection:send("currentsong", function(_, s) song = s end)

    timer.start_new(0.10, function()
        if status == nil or song == nil then return true end

        dbg.dump(status)
        dbg.dump(song)

        local info = {}
        info.title = status.state .. " " .. status.song .. "/" .. status.playlistlength .. " " .. song_duration(status.elapsed, status.duration)
        info.text = tostring(song.artist or "") .. " - " .. tostring(song.title or "") .. "\n"
            .. tostring(song.album or "")
        callback(info)
        return false
    end)
end

local popup = {}
function popup:show()
    get_info(function(table)
        if self._notification ~= nil then return end
        self._notification = naughty.notify(
            { title = table.title
            -- , icon = img
            , text = table.text
            , timeout = 0
            })
    end)
end

function popup:hide()
    if self._notification ~= nil then
        naughty.destroy(self._notification)
        self._notification = nil
    end
end

function popup:update()
    get_info(function(table)
        if self._notification == nil then return end
        naughty.replace_text(self._notification, table.title, table.text)
    end)
end

function popup:run()
    self._timer = timer({ timeout = 1 })
    self._timer:connect_signal("start",   function() self:show() end)
    self._timer:connect_signal("timeout", function() self:update() end)
    self._timer:connect_signal("stop",    function() self:hide() end)  --TODO delay

    mpd_widget:connect_signal("mouse::enter", function() self._timer:again() end)
    mpd_widget:connect_signal("mouse::leave", function() self._timer:stop() end)
end

popup:run()

globalkeys = gears.table.join(globalkeys,
    awful.key({ modkey }, "p", function() connection:toggle_play() end,
              { description = "toogle play", group = "mpd" }),
    awful.key({ modkey }, ",", function() connection:send("previous") end,
              { description = "previous track", group = "mpd" }),
    awful.key({ modkey }, ".", function() connection:send("next") end,
              { description = "next track", group = "mpd" })
)
return mpd_widget