# Copyright (C) 2006, 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

import gtk
import gobject
import wnck

import view.stylesheet
from sugar.graphics import style
from view.home.HomeWindow import HomeWindow
from sugar.presence import PresenceService
from view.ActivityHost import ActivityHost
from sugar.activity import ActivityFactory
from sugar.activity import Activity
from view.frame.Frame import Frame
from _sugar import KeyGrabber
import sugar

class Shell(gobject.GObject):
	__gsignals__ = {
		'activity-opened':  (gobject.SIGNAL_RUN_FIRST,
							 gobject.TYPE_NONE, ([gobject.TYPE_PYOBJECT])),
		'activity-changed': (gobject.SIGNAL_RUN_FIRST,
							 gobject.TYPE_NONE, ([gobject.TYPE_PYOBJECT])),
		'activity-closed':  (gobject.SIGNAL_RUN_FIRST,
							 gobject.TYPE_NONE, ([gobject.TYPE_PYOBJECT]))
	}

	def __init__(self, model):
		gobject.GObject.__init__(self)

		self._model = model
		self._hosts = {}
		self._screen = wnck.screen_get_default()
		self._current_host = None

		style.load_stylesheet(view.stylesheet)

		self._key_grabber = KeyGrabber()
		self._key_grabber.connect('key-pressed',
								  self.__global_key_pressed_cb)
		self._key_grabber.connect('key-released',
								  self.__global_key_released_cb)
		self._key_grabber.grab('F1')
		self._key_grabber.grab('F2')
		self._key_grabber.grab('F3')
		self._key_grabber.grab('F4')
		self._key_grabber.grab('F5')
		self._key_grabber.grab('F6')
		self._key_grabber.grab('F9')

		self._home_window = HomeWindow(self)
		self._home_window.show()
		self.set_zoom_level(sugar.ZOOM_HOME)

		self._screen.connect('window-opened', self.__window_opened_cb)
		self._screen.connect('window-closed', self.__window_closed_cb)
		self._screen.connect('active-window-changed',
							 self.__active_window_changed_cb)

		self._frame = Frame(self)
		self._frame.show_and_hide(3)

	def __global_key_pressed_cb(self, grabber, key):
		if key == 'F1':
			self.set_zoom_level(sugar.ZOOM_ACTIVITY)
		elif key == 'F2':
			self.set_zoom_level(sugar.ZOOM_HOME)
		elif key == 'F3':
			self.set_zoom_level(sugar.ZOOM_FRIENDS)
		elif key == 'F4':
			self.set_zoom_level(sugar.ZOOM_MESH)
		elif key == 'F5':
			self._frame.notify_key_press()
		elif key == 'F6':
			self.start_activity('org.sugar.Terminal')
		elif key == 'F9':
			self.toggle_chat_visibility()

	def __global_key_released_cb(self, grabber, key):
		if key == 'F5':
			self._frame.notify_key_release()

	def __window_opened_cb(self, screen, window):
		if window.get_window_type() == wnck.WINDOW_NORMAL:
			activity_host = ActivityHost(window)
			self._hosts[activity_host.get_xid()] = activity_host
			self.emit('activity-opened', activity_host)

	def __active_window_changed_cb(self, screen):
		window = screen.get_active_window()

		if window and window.get_window_type() == wnck.WINDOW_NORMAL:
			activity_host = self._hosts[window.get_xid()]
			current = self._model.get_current_activity()
			if activity_host.get_id() == current:
				return

			self._set_current_activity(activity_host)

	def __window_closed_cb(self, screen, window):
		if window.get_window_type() == wnck.WINDOW_NORMAL:
			if self._hosts.has_key(window.get_xid()):
				host = self._hosts[window.get_xid()]
				host.destroy()

				self.emit('activity-closed', host)
				del self._hosts[window.get_xid()]

		if len(self._hosts) == 0:
			self._set_current_activity(None)

	def _set_current_activity(self, host):
		if host:
			self._model.set_current_activity(host.get_id())
		else:
			self._model.set_current_activity(None)

		if self._current_host:
			self._current_host.set_active(False)

		self._current_host = host

		if self._current_host:
			self._current_host.set_active(True)

		self.emit('activity-changed', host)

	def get_model(self):
		return self._model

	def join_activity(self, bundle_id, activity_id):
		pservice = PresenceService.get_instance()

		activity = self._get_activity(activity_id)
		if activity:
			activity.present()
		else:
			activity_ps = pservice.get_activity(activity_id)

			if activity_ps:
				activity = ActivityFactory.create(bundle_id)
				activity.join(activity_ps.object_path())
			else:
				logging.error('Cannot start activity.')

	def start_activity(self, activity_type):
		activity = ActivityFactory.create(activity_type)
		activity.execute('test', [])
		return activity

	def set_zoom_level(self, level):
		if level == sugar.ZOOM_ACTIVITY:
			self._screen.toggle_showing_desktop(False)
		else:
			self._screen.toggle_showing_desktop(True)
			self._home_window.set_zoom_level(level)

	def get_current_activity(self):
		activity_id = self._model.get_current_activity()
		if activity_id:
			return self._get_activity(activity_id)
		else:
			return None

	def _get_activity(self, activity_id):
		for host in self._hosts.values():
			if host.get_id() == activity_id:
				return host
		return None

	def toggle_chat_visibility(self):
		act = self.get_current_activity()
		if not act:
			return
		is_visible = self._frame.is_visible()
		if act.is_chat_visible():
			frame_was_visible = act.chat_hide()
			if not frame_was_visible:
				self._frame.do_slide_out()
		else:
			if not is_visible:
				self._frame.do_slide_in()
			act.chat_show(is_visible)