# Copyright 2022 (c) Anna Schumaker.
"""A sidebar Section Header widget."""
from gi.repository import GObject
from gi.repository import Gtk
from gi.repository import Adw
from .title import Title


class Header(Gtk.Box):
    """The Section Header."""

    icon_name = GObject.Property(type=str)
    title = GObject.Property(type=str)
    subtitle = GObject.Property(type=str)
    pending = GObject.Property(type=bool, default=False)
    progress = GObject.Property(type=float)

    active = GObject.Property(type=bool, default=False)
    extra_widget = GObject.Property(type=Gtk.Widget)
    reveal_widget = GObject.Property(type=Gtk.Widget)
    animation = GObject.Property(type=Gtk.RevealerTransitionType,
                                 default=Gtk.RevealerTransitionType.SLIDE_UP)

    def __init__(self, icon_name: str = "image-missing",
                 title: str = "", subtitle: str = "",
                 extra_widget: Gtk.Widget = None, **kwargs):
        """Initialize a row Header widget."""
        super().__init__(icon_name=icon_name, extra_widget=extra_widget,
                         title=title, subtitle=subtitle,
                         orientation=Gtk.Orientation.VERTICAL, **kwargs)
        self._overlay = Gtk.Overlay(css_name="button")
        self._box = Gtk.Box.new(Gtk.Orientation.HORIZONTAL, spacing=12)
        self._icon = Gtk.Image(icon_name=self.icon_name,
                               icon_size=Gtk.IconSize.LARGE)
        self._title = Title(title=self.title, subtitle=self.subtitle)
        self._extra = Adw.Bin(child=self.extra_widget, valign=Gtk.Align.CENTER)
        self._arrow = Gtk.Image(icon_name="go-down-symbolic")
        self._progress = Gtk.ProgressBar(valign=Gtk.Align.END,
                                         visible=self.pending)
        self._revealer = Gtk.Revealer(transition_type=self.animation)
        self._clicked = Gtk.GestureClick()

        self._arrow.add_css_class("emmental-sidebar-arrow")
        self._progress.add_css_class("osd")

        self.bind_property("icon-name", self._icon, "icon-name")
        self.bind_property("title", self._title, "title")
        self.bind_property("subtitle", self._title, "subtitle")
        self.bind_property("extra-widget", self._extra, "child")
        self.bind_property("pending", self._progress, "visible")
        self.bind_property("progress", self._progress, "fraction")

        self.bind_property("active", self._revealer, "reveal-child")
        self.bind_property("active", self._revealer, "vexpand")
        self.bind_property("reveal-widget", self._revealer, "child")
        self.bind_property("animation", self._revealer, "transition-type")

        self._clicked.connect("released", self.activate)
        self.connect("notify::active", self.__notify_active)

        self._box.append(self._icon)
        self._box.append(self._title)
        self._box.append(self._extra)
        self._box.append(self._arrow)

        self._overlay.set_child(self._box)
        self._overlay.add_overlay(self._progress)
        self._overlay.add_controller(self._clicked)

        self.append(self._overlay)
        self.append(self._revealer)

    def __notify_active(self, header, param) -> None:
        if self.active:
            self._arrow.set_state_flags(Gtk.StateFlags.CHECKED, False)
        else:
            self._arrow.unset_state_flags(Gtk.StateFlags.CHECKED)

    def activate(self, *args) -> None:
        """Activate the Header."""
        self.active = True