# Copyright 2021 (c) Anna Schumaker.
import audio
from gi.repository import Gtk
from gi.repository import Pango
from . import widgets

BoldAttr = Pango.AttrList.new()
BoldAttr.insert(Pango.attr_weight_new(Pango.Weight.BOLD))


class Label(Gtk.Label):
    def __init__(self):
        Gtk.Label.__init__(self)
        self.set_ellipsize(Pango.EllipsizeMode.MIDDLE)
        self.set_halign(Gtk.Align.START)
        self.set_hexpand(True)

    def set_bold(self, newval):
        self.set_attributes(BoldAttr if newval else None)


class Grid(Gtk.Grid):
    def __init__(self):
        Gtk.Grid.__init__(self)
        self.icon  = self.attach(Gtk.Image(), 0, 0, 1, 2)
        self.name  = self.attach(Label(),     1, 0, 1, 1)
        self.count = self.attach(Label(),     1, 1, 1, 1)
        self.set_column_spacing(5)
        self.cbid = None

    def attach(self, widget, x, y, w, h):
        super().attach(widget, x, y, w, h)
        return widget

    def plist_changed(self, player, old, new, this):
        self.name.set_bold(new == this)
        self.count.set_bold(new == this)

    def set_count(self, item, *args):
        n = item.get_n_tracks()
        self.count.set_text(f"{n} Track{'s' if n != 1 else ''}")

    def set_item(self, item):
        self.icon.set_from_icon_name(item.get_property("icon-name"))
        self.name.set_text(item.get_property("name"))
        self.plist_changed(None, None, audio.Player.playlist, item)
        self.set_count(item)

        item.connect("track-added", self.set_count)
        item.connect("track-removed", self.set_count)
        item.connect("refreshed", self.set_count)
        self.cbid = audio.Player.connect("playlist-changed",
                                          self.plist_changed, item)

    def unset_item(self, item):
        if item:
            self.cbid = audio.Player.disconnect(self.cbid)
            item.disconnect_by_func(self.set_count)
            item.disconnect_by_func(self.set_count)
            item.disconnect_by_func(self.set_count)


class UserGrid(Grid):
    def __init__(self):
        Grid.__init__(self)
        self.remove = self.attach(Gtk.Button(), 2, 0, 1, 2)
        self.remove.set_icon_name("list-remove")
        self.remove.add_css_class("flat")
        self.remove.set_halign(Gtk.Align.CENTER)
        self.remove.set_valign(Gtk.Align.CENTER)

    def set_item(self, item):
        system = [ "Collection", "Favorites", "New Tracks",
                   "Previous", "Queued Tracks" ]
        super().set_item(item)
        self.remove.set_visible(item.name not in system)
        self.remove.connect("clicked", self.clicked, item)

    def unset_item(self, item):
        self.remove.disconnect_by_func(self.clicked)

    def clicked(self, button, item):
        item.delete()


class LibraryGrid(Grid):
    def __init__(self):
        Grid.__init__(self)
        self.menu = self.attach(Gtk.MenuButton(), 2, 0, 1, 2)
        self.menu.add_css_class("flat")
        self.menu.get_first_child().add_css_class("flat")
        self.menu.set_direction(Gtk.ArrowType.LEFT)
        self.menu.set_halign(Gtk.Align.CENTER)
        self.menu.set_valign(Gtk.Align.CENTER)

    def set_item(self, item):
        super().set_item(item)
        self.menu.set_popover(widgets.LibraryPopover(item))

    def unset_item(self, item):
        super().unset_item(item)
        self.menu.set_popover(None)


class TreeRow(Gtk.TreeExpander):
    def __init__(self, child):
        Gtk.TreeExpander.__init__(self)
        self.set_child(child)

    def set_item(self, listitem):
        self.set_list_row(listitem)
        self.get_child().set_item(listitem.get_item())

    def unset_item(self, listitem):
        self.get_child().unset_item(listitem.get_item())
        self.set_list_row(None)


class TreeRowFactory(Gtk.SignalListItemFactory):
    def __init__(self):
        Gtk.SignalListItemFactory.__init__(self)
        self.connect("setup", self.setup)
        self.connect("bind", self.bind)
        self.connect("unbind", self.unbind)
        self.connect("teardown", self.teardown)

    def setup(self, factory, treeitem):
        treeitem.set_child(TreeRow(Grid()))

    def bind(self, factory, treeitem):
        treeitem.get_child().set_item(treeitem.get_item())

    def unbind(self, factory, treeitem):
        treeitem.get_child().unset_item(treeitem.get_item())

    def teardown(self, factory, treeitem):
        treeitem.set_child(None)
Factory = TreeRowFactory()


class UserTreeRowFactory(TreeRowFactory):
    def setup(self, factory, treeitem):
        treeitem.set_child(TreeRow(UserGrid()))
UserFactory = UserTreeRowFactory()


class LibraryTreeRowFactory(TreeRowFactory):
    def setup(self, factory, treeitem):
        treeitem.set_child(TreeRow(LibraryGrid()))
LibraryFactory = LibraryTreeRowFactory()


class UserRow(Gtk.Box):
    def __init__(self):
        Gtk.Box.__init__(self)
        self.icon = Gtk.Image()
        self.name = Label()
        self.set_spacing(5)
        self.append(self.icon)
        self.append(self.name)

    def set_item(self, item):
        self.icon.set_from_icon_name(item.get_property("icon-name"))
        self.name.set_text(item.get_property("name"))


class UserRowFactory(Gtk.SignalListItemFactory):
    def __init__(self):
        Gtk.SignalListItemFactory.__init__(self)
        self.connect("setup", self.setup)
        self.connect("bind", self.bind)
        self.connect("teardown", self.teardown)

    def setup(self, factory, item):
        item.set_child(UserRow())

    def bind(self, factory, item):
        item.get_child().set_item(item.get_item())

    def teardown(self, factory, item):
        item.set_child(None)