# Copyright (C) 2006-2007 Red Hat, Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

from sugar.presence import presenceservice
from sugar.graphics.tray import VTray, TrayIcon

from jarabe.view.buddymenu import BuddyMenu
from jarabe.frame.frameinvoker import FrameWidgetInvoker
from jarabe.model import shell
from jarabe.model.buddy import BuddyModel

class FriendIcon(TrayIcon):
    def __init__(self, buddy):
        TrayIcon.__init__(self, icon_name='computer-xo',
                          xo_color=buddy.get_color())

        self.set_palette_invoker(FrameWidgetInvoker(self))
        self.palette = BuddyMenu(buddy)
        self.palette.props.icon_visible = False
        self.palette.set_group_id('frame')

class FriendsTray(VTray):
    def __init__(self):
        VTray.__init__(self)

        self._activity_ps = None
        self._joined_hid = -1
        self._left_hid = -1
        self._buddies = {}

        self._pservice = presenceservice.get_instance()
        self._pservice.connect('activity-appeared',
                               self.__activity_appeared_cb)

        self._owner = self._pservice.get_owner()

        # Add initial activities the PS knows about
        self._pservice.get_activities_async( \
                reply_handler=self._get_activities_cb)

        shell.get_model().connect('active-activity-changed',
                                  self._active_activity_changed_cb)

    def _get_activities_cb(self, activities_list):
        for act in activities_list:
            self.__activity_appeared_cb(self._pservice, act)

    def add_buddy(self, buddy):
        if self._buddies.has_key(buddy.props.key):
            return

        model = BuddyModel(buddy=buddy)

        icon = FriendIcon(model)
        self.add_item(icon)
        icon.show()

        self._buddies[buddy.props.key] = icon

    def remove_buddy(self, buddy):
        if not self._buddies.has_key(buddy.props.key):
            return

        self.remove_item(self._buddies[buddy.props.key])
        del self._buddies[buddy.props.key]

    def clear(self):
        for item in self.get_children():
            self.remove_item(item)
            item.destroy()
        self._buddies = {}

    def __activity_appeared_cb(self, pservice, activity_ps):
        activity = shell.get_model().get_active_activity()
        if activity and activity_ps.props.id == activity.get_activity_id():
            self._set_activity_ps(activity_ps, True)

    def _set_activity_ps(self, activity_ps, shared_activity):
        if self._activity_ps == activity_ps:
            return

        if self._joined_hid > 0:
            self._activity_ps.disconnect(self._joined_hid)
            self._joined_hid = -1
        if self._left_hid > 0:
            self._activity_ps.disconnect(self._left_hid)
            self._left_hid = -1

        self._activity_ps = activity_ps

        self.clear()

        # always display ourselves
        self.add_buddy(self._owner)

        if shared_activity is True:
            for buddy in activity_ps.get_joined_buddies():
                self.add_buddy(buddy)

            self._joined_hid = activity_ps.connect(
                            'buddy-joined', self.__buddy_joined_cb)
            self._left_hid = activity_ps.connect(
                            'buddy-left', self.__buddy_left_cb)

    def _active_activity_changed_cb(self, home_model, home_activity):
        if home_activity is None:
            return

        activity_id = home_activity.get_activity_id()
        if activity_id is None:
            return

        # check if activity is shared
        activity = None
        for act in self._pservice.get_activities():
            if activity_id == act.props.id:
                activity = act
                break
        if activity:
            self._set_activity_ps(activity, True)
        else:
            self._set_activity_ps(home_activity, False)

    def __buddy_joined_cb(self, activity, buddy):
        self.add_buddy(buddy)

    def __buddy_left_cb(self, activity, buddy):
        self.remove_buddy(buddy)