import sys
import dbus

import core.module
import core.widget
import core.input
import core.decorators
import util.format

"""Displays the current song being played and allows pausing, skipping ahead, and skipping back.

Requires the following library:
    * python-dbus

Parameters:
    * spotify-buttons.format:   Format string (defaults to '{artist} - {title}')
      Available values are: {album}, {title}, {artist}, {trackNumber}
    * spotify-buttons.layout:   Order in which widgets appear (defaults to song, previous, pause, next)
      Widget names are: spotify-buttons.song, spotify-buttons.prev, spotify-buttons.pause, spotify-buttons.next
"""


class Module(core.module.Module):
    def __init__(self, config, theme):
        super().__init__(config, theme, [])

        self.__layout = self.parameter(
            "layout",
            util.format.aslist("spotify-buttons.song,spotify-buttons.prev,spotify-buttons.pause,spotify-buttons.next"),
        )

        self.__song = ""
        self.__pause = ""
        self.__format = self.parameter("format", "{artist} - {title}")

        self.__cmd = "dbus-send --session --type=method_call --dest=org.mpris.MediaPlayer2.spotify \
                /org/mpris/MediaPlayer2 org.mpris.MediaPlayer2.Player."

    def hidden(self):
        return self.string_song == ""

    def update(self):
        try:
            self.clear_widgets()
            bus = dbus.SessionBus()
            spotify = bus.get_object(
                "org.mpris.MediaPlayer2.spotify", "/org/mpris/MediaPlayer2"
            )
            spotify_iface = dbus.Interface(spotify, "org.freedesktop.DBus.Properties")
            props = spotify_iface.Get("org.mpris.MediaPlayer2.Player", "Metadata")
            playback_status = str(
                spotify_iface.Get("org.mpris.MediaPlayer2.Player", "PlaybackStatus")
            )
            if playback_status == "Playing":
                self.__pause = "\u258D\u258D"
            else:
                self.__pause = "\u25B6"
            self.__song = self.__format.format(
                album=str(props.get("xesam:album")),
                title=str(props.get("xesam:title")),
                artist=",".join(props.get("xesam:artist")),
                trackNumber=str(props.get("xesam:trackNumber")),
            )

            #add widgets
            widget_map = {}
            for widget_name in self.__layout:
                widget = self.add_widget(name=widget_name)
                if widget_name == "spotify-buttons.prev":
                    widget_map[widget] = {
                        "button": core.input.LEFT_MOUSE,
                        "cmd": self.__cmd + "Previous",
                    }
                    widget.full_text("\u258F\u25C0")
                elif widget_name == "spotify-buttons.pause":
                    widget_map[widget] = {
                        "button": core.input.LEFT_MOUSE,
                        "cmd": self.__cmd + "PlayPause",
                    }
                    widget.full_text(self.__pause)
                elif widget_name == "spotify-buttons.next":
                    widget_map[widget] = {
                        "button": core.input.LEFT_MOUSE,
                        "cmd": self.__cmd + "Next",
                    }
                    widget.full_text("\u25B6\u2595")
                elif widget_name == "spotify-buttons.song":
                    widget.full_text(self.__song)
                else:
                    raise KeyError(
                        "The spotify module does not have a {widget_name!r} widget".format(
                            widget_name=widget_name
                        )
                    )
            for widget, callback_options in widget_map.items():
                core.input.register(widget, **callback_options)

        except Exception:
            self.__song = ""

    @property
    def string_song(self):
        if sys.version_info.major < 3:
            return unicode(self.__song)
        return str(self.__song)