#!/usr/bin/env python3
"""
Syncthing-GTK - RIBar

Infobar wrapped in Revealer, for greater justice
"""

from gi.repository import GLib, GObject, Gtk


RevealerClass = None
if hasattr(Gtk, "Revealer"):
    RevealerClass = Gtk.Revealer
else:
    from syncthing_gtk.fakerevealer import FakeRevealer
    RevealerClass = FakeRevealer


class RIBar(RevealerClass):
    """
    Infobar wrapped in Revealer

    Signals:
            Everything from Gtk.Revealer, plus:
            close()
                    emitted when the user dismisses the info bar
            response(response_id)
                    Emitted when an action widget (button) is clicked
    """
    __gsignals__ = {
        "response": (GObject.SIGNAL_RUN_FIRST, None, (int,)),
        "close": (GObject.SIGNAL_RUN_FIRST, None, ()),
    }

    # Initialization
    def __init__(self, label, message_type=Gtk.MessageType.INFO, *buttons):
        """
        ... where label can be Gtk.Widget or str and buttons are tuples
        of (Gtk.Button, response_id)
        """
        # Init
        RevealerClass.__init__(self)
        self._infobar = Gtk.InfoBar()
        self._values = {}
        self._label = None
        # Icon
        icon_name = "dialog-information"
        if message_type == Gtk.MessageType.ERROR:
            icon_name = "dialog-error"
        elif message_type == Gtk.MessageType.WARNING:
            icon_name = "dialog-warning"
        icon = Gtk.Image()
        icon.set_from_icon_name(icon_name, Gtk.IconSize.DIALOG)
        self._infobar.get_content_area().pack_start(icon, False, False, 1)
        # Label
        if isinstance(label, Gtk.Widget):
            self._infobar.get_content_area().pack_start(label, True, True, 0)
            self._label = label
        else:
            self._label = Gtk.Label()
            self._label.set_size_request(300, -1)
            self._label.set_markup(label)
            self._label.set_alignment(0, 0.5)
            self._label.set_line_wrap(True)
            self._infobar.get_content_area().add(self._label)
        # Buttons
        for button, response_id in buttons:
            self.add_button(button, response_id)
        # Signals
        self._infobar.connect("close", self._cb_close)
        self._infobar.connect("response", self._cb_response)
        # Settings
        self._infobar.set_message_type(message_type)
        if hasattr(self._infobar, "set_show_close_button"):
            # GTK >3.8
            self._infobar.set_show_close_button(True)
        else:
            self.add_button(Gtk.Button("X"), 0)
        self.set_reveal_child(False)
        # Packing
        self.add(self._infobar)
        self.show_all()

    def _cb_close(self, ib):
        self.emit("close")

    def _cb_response(self, ib, response_id):
        self.emit("response", response_id)

    def disable_close_button(self):
        if hasattr(self._infobar, "set_show_close_button"):
            self._infobar.set_show_close_button(False)

    def add_widget(self, widget, expand=False, fill=True):
        self._infobar.get_content_area().pack_start(widget, expand, fill, 1)
        widget.show()

    def add_button(self, button, response_id):
        self._infobar.add_action_widget(button, response_id)
        self._infobar.show_all()

    def get_label(self):
        """ Returns label widget """
        return self._label

    def close_on_close(self):
        """
        Setups revealer so it will be automatically closed, removed and
        destroyed when user clicks to any button, including 'X'
        """
        self.connect("close", self.close)
        self.connect("response", self.close)

    def close(self, *a):
        """
        Closes revealer (with animation), removes it from parent and
        calls destroy()
        """
        self.set_reveal_child(False)
        GLib.timeout_add(self.get_transition_duration() + 50, self._cb_destroy)

    def _cb_destroy(self, *a):
        """ Callback used by _cb_close method """
        if not self.get_parent() is None:
            self.get_parent().remove(self)
        self.destroy()

    def set_value(self, key, value):
        """ Stores some metadata """
        self._values[key] = value

    def get_value(self, key):
        """ Retrieves some metadata """
        return self._values[key]

    def __getitem__(self, key):
        """ Shortcut to get_value """
        return self._values[key]

    def __setitem__(self, key, value):
        """ Shortcut to set_value """
        self.set_value(key, value)

    @staticmethod
    def build_button(label, icon_name=None, icon_widget=None, use_stock=False):
        """ Builds button suitable for action area """
        b = Gtk.Button.new_from_stock(label) if use_stock \
            else Gtk.Button.new_with_label(label)
        b.set_use_underline(True)
        if icon_name is not None:
            icon_widget = Gtk.Image()
            icon_widget.set_from_icon_name(icon_name, Gtk.IconSize.BUTTON)
        if icon_widget is not None:
            b.set_image(icon_widget)
            b.set_always_show_image(True)
        return b