# Copyright 2022 (c) Anna Schumaker.
"""Displays user and system playlists."""
import collections
from gi.repository import Gtk
from .. import db
from .. import buttons
from . import row
from . import section

ATTR_NAMES = ["icon_name", "activatable", "modifiable"]
Attrs = collections.namedtuple("Attrs", ATTR_NAMES)

PLAYLIST_ATTRS = {
    "Collection": Attrs("library-music", True, False),
    "Favorite Tracks": Attrs("heart-filled", True, False),
    "Most Played Tracks": Attrs("right-large", True, False),
    "New Tracks": Attrs("music-note-single", True, False),
    "Previous Tracks": Attrs("media-skip-backward", False, False),
    "Queued Tracks": Attrs("music-queue", True, False),
    "Unplayed Tracks": Attrs("circle-outline-thick", True, False),
}
FALLBACK_ATTR = Attrs("playlist2", True, True)


class PlaylistRow(row.TreeRow):
    """A factory for making PlaylistRows."""

    def __init__(self, *args, **kwargs):
        """Initialize a PlaylistRow."""
        super().__init__(*args, indented=False, **kwargs)
        self.child = row.PlaylistRow()

    def do_bind(self) -> None:
        """Bind a Playlist to this Row."""
        super().do_bind()
        attr = PLAYLIST_ATTRS.get(self.item.name, FALLBACK_ATTR)
        self.listitem.set_activatable(attr.activatable)
        self.child.icon_name = f"{attr.icon_name}-symbolic"
        self.child.modifiable = attr.modifiable
        self.bind_and_set_property("image", "filepath", bidirectional=True)


class Section(section.Section):
    """A sidebar Section for user and system playlists."""

    def __init__(self, table: db.playlists.Table):
        """Initialize our playlist section."""
        super().__init__(table, PlaylistRow, icon_name="playlist2",
                         title="Playlists", subtitle="0 playlists")
        self._entry = Gtk.Entry(placeholder_text="add new playlist",
                                primary_icon_name="list-add")
        self.extra_widget = buttons.PopoverButton(icon_name="document-new",
                                                  tooltip_text=("add new "
                                                                "playlist"),
                                                  has_frame=False,
                                                  popover_child=self._entry)

        self._entry.connect("activate", self.__add_new_playlist)
        self._entry.connect("changed", self.__entry_changed)
        self._entry.connect("icon-release", self.__entry_icon_release)
        self._entry.add_css_class("card")

    def __add_new_playlist(self, entry: Gtk.Entry) -> None:
        if self.table.create(entry.get_text()) is not None:
            self.table.sql.commit()
            self.extra_widget.popdown()

    def __entry_changed(self, entry: Gtk.Entry) -> None:
        icon_name = "edit-clear-symbolic" if entry.get_text() != "" else ""
        self._entry.set_icon_from_icon_name(Gtk.EntryIconPosition.SECONDARY,
                                            icon_name)

    def __entry_icon_release(self, entry: Gtk.Entry,
                             pos: Gtk.EntryIconPosition) -> None:
        if pos == Gtk.EntryIconPosition.PRIMARY:
            self.__add_new_playlist(entry)
        else:
            entry.set_text("")

    def do_get_subtitle(self, n_playlists: int) -> str:
        """Return a subtitle for this section."""
        s_playlists = "s" if n_playlists != 1 else ""
        return f"{n_playlists} playlist{s_playlists}"