# Copyright 2022 (c) Anna Schumaker.
"""A widget for selecting ReplayGain mode."""
from gi.repository import GObject
from gi.repository import Gtk


class Selector(Gtk.Grid):
    """Build up a widget for configuring ReplayGain settings."""

    enabled = GObject.Property(type=bool, default=False)
    mode = GObject.Property(type=str, default="auto")

    def __init__(self):
        """Initialize the ReplayGain selector."""
        super().__init__(column_spacing=6, margin_top=8)
        self._title = Gtk.Label(label="Volume Normalization", yalign=0.8,
                                hexpand=True, vexpand=True)
        self._switch = Gtk.Switch()
        self._auto = Gtk.CheckButton(label="Decide automatically",
                                     sensitive=False, active=True)
        self._album = Gtk.CheckButton(label="Albums have the same volume",
                                      sensitive=False, group=self._auto)
        self._track = Gtk.CheckButton(label="Tracks have the same volume",
                                      sensitive=False, group=self._auto)

        self.attach(self._title,  0, 0, 1, 1)
        self.attach(self._switch, 1, 0, 1, 1)
        self.attach(self._auto,   0, 1, 2, 1)
        self.attach(self._album,  0, 2, 2, 1)
        self.attach(self._track,  0, 3, 2, 1)

        self.connect("notify::mode", self.__notify_mode)
        self._auto.connect("toggled", self.__mode_toggled, "auto")
        self._album.connect("toggled", self.__mode_toggled, "album")
        self._track.connect("toggled", self.__mode_toggled, "track")

        self._switch.bind_property("state", self._auto, "sensitive")
        self._switch.bind_property("state", self._album, "sensitive")
        self._switch.bind_property("state", self._track, "sensitive")
        self.bind_property("enabled", self._switch, "state",
                           GObject.BindingFlags.BIDIRECTIONAL)

        self._title.add_css_class("title-4")

    def __notify_mode(self, selector: Gtk.Grid, param) -> None:
        match selector.get_property("mode"):
            case "album": self._album.set_active(True)
            case "track": self._track.set_active(True)
            case _: self._auto.set_active(True)

    def __mode_toggled(self, check: Gtk.CheckButton, new_mode: str) -> None:
        if check.get_active():
            self.mode = new_mode