local wibox = require('wibox')
local awful = require('awful')
local lgi = require('lgi')
local theme = require('src.theme')
local mpris = require('src.util.mpris')

local mpris_icon = wibox.widget.imagebox(theme.widget_pause)
local mpris_widget = wibox.widget.textbox()

local function variant_strip(v)
    if not tostring(v):find("GLib%.Variant$") then
        if type(v) == "table" and #v > 0 then
            v.n = nil
        end
        return v
    end

    if v:is_container() and not v:is_of_type(lgi.GLib.VariantType.VARIANT) then
        local out = {}
        local n_children = v:n_children()
        local idx = 0

        local is_dict = v:is_of_type(lgi.GLib.VariantType.DICTIONARY)
        while idx < n_children do
            local val = v:get_child_value(idx)
            idx = idx + 1
            if is_dict then
                local key = val[1]
                local value = variant_strip(val[2])
                out[key] = variant_strip(value)
            else
                out[idx] = variant_strip(val)
            end
        end

        return out
    else
        return variant_strip(v.value)
    end
end

local function signal_cbk(_conn, _sender, _object_path, _interface_name, _signal_name, params, _user_data)
    local data = variant_strip(params)
    if type(data) ~= 'table' or type(data[2]) ~= 'table' then return end
    data = data[2]
    if data['PlaybackStatus'] then
        if data['PlaybackStatus'] == 'Playing' then
            mpris_icon:set_image(theme.widget_play)
        elseif data['PlaybackStatus'] == 'Paused' then
            mpris_icon:set_image(theme.widget_pause)
        else
            mpris_icon:set_image(theme.widget_stop)
            mpris_widget.text = 'Nothing playing'
        end
    elseif data['Metadata'] then
        data = data['Metadata']
        local title = data['xesam:title'] or ''
        local artist = (data['xesam:artist'] or {})[1] or ''
        mpris_widget.text = artist .. ' | ' .. title
    end
end

lgi.Gio.bus_get_sync(lgi.Gio.BusType.SESSION):signal_subscribe(
    nil, 'org.freedesktop.DBus.Properties', 'PropertiesChanged', '/org/mpris/MediaPlayer2',
    nil, lgi.Gio.DBusSignalFlags.NONE, signal_cbk
)

local mpris_buttons = awful.util.table.join(
    awful.button({}, 1, mpris.play_pause),
    awful.button({}, 2, mpris.previous),
    awful.button({}, 3, mpris.skip)
)

mpris_icon:buttons(mpris_buttons)
mpris_widget:buttons(mpris_buttons)

return { wibox.layout.fixed.horizontal(mpris_icon, mpris_widget) }