import dbus
import dbus.service
import dbus.glib

import pygtk
pygtk.require('2.0')
import gtk
import pango
import gobject

import sugar.util
from sugar.chat.ChatWindow import ChatWindow
from sugar.chat.ActivityChat import ActivityChat
from sugar.chat.MeshChat import MeshChat
from sugar.LogWriter import LogWriter

from Owner import ShellOwner
from StartPage import StartPage
from WindowManager import WindowManager
from PresenceWindow import PresenceWindow

class ActivityHostSignalHelper(gobject.GObject):
	__gsignals__ = {
		'shared': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE, ([]))
	}

	def __init__(self, parent):
		gobject.GObject.__init__(self)
		self._parent = parent

	def emit_shared(self):
		self.emit('shared')

class ActivityHost(dbus.service.Object):
	def __init__(self, activity_container, activity_name, default_type, activity_id = None):
		self.peer_service = None

		self.activity_name = activity_name
		self.ellipsize_tab = False
		self._shared = False

		self._signal_helper = ActivityHostSignalHelper(self)

		self.activity_container = activity_container
		
		if activity_id is None:
			self.activity_id = sugar.util.unique_id()
		else:
			self.activity_id = activity_id
		self._default_type = default_type	
	
		self.dbus_object_name = "/com/redhat/Sugar/Shell/Activities/%s" % self.activity_id
		
		dbus.service.Object.__init__(self, activity_container.service, self.dbus_object_name)
		self.socket = gtk.Socket()
		self.socket.set_data("sugar-activity", self)
		self.socket.show()
		
		hbox = gtk.HBox(False, 4);

		self.tab_activity_image = gtk.Image()
		self.tab_activity_image.set_from_stock(gtk.STOCK_CONVERT, gtk.ICON_SIZE_MENU)
		hbox.pack_start(self.tab_activity_image)
		#self.tab_activity_image.show()		
		
		self.label_hbox = gtk.HBox(False, 4);
		self.label_hbox.connect("style-set", self.__tab_label_style_set_cb)
		hbox.pack_start(self.label_hbox)

		self.tab_label = gtk.Label(self.activity_name)
		self.tab_label.set_single_line_mode(True)
		self.tab_label.set_alignment(0.0, 0.5)
		self.tab_label.set_padding(0, 0)
		self.tab_label.show()
		
		close_image = gtk.Image()
		close_image.set_from_stock (gtk.STOCK_CLOSE, gtk.ICON_SIZE_MENU)
		close_image.show()
		
		self.tab_close_button = gtk.Button()
		rcstyle = gtk.RcStyle();
		rcstyle.xthickness = rcstyle.ythickness = 0;
		self.tab_close_button.modify_style (rcstyle);
		self.tab_close_button.add(close_image)
		self.tab_close_button.set_relief(gtk.RELIEF_NONE)
		self.tab_close_button.set_focus_on_click(False)
		self.tab_close_button.connect("clicked", self.tab_close_button_clicked)
		
		self.label_hbox.pack_start(self.tab_label)
		self.label_hbox.pack_start(self.tab_close_button, False, False, 0)
		self.label_hbox.show()
		
		hbox.show()

		self._create_chat()
				
		notebook = self.activity_container.notebook
		index = notebook.append_page(self.socket, hbox)
		notebook.set_current_page(index)
		
	def _create_chat(self):
		self._activity_chat = ActivityChat(self)

	def got_focus(self):
		if self.peer_service != None:
			self.peer_service.got_focus()
	
	def lost_focus(self):
		self.peer_service.lost_focus()

	def get_chat(self):
		return self._activity_chat

	def get_default_type(self):
		return self._default_type

	def __close_button_clicked_reply_cb(self):
		pass

	def __close_button_clicked_error_cb(self, error):
		pass
	
	def publish(self):
		self._activity_chat.publish()
		self.peer_service.publish()
	
	def tab_close_button_clicked(self, button):
		self.peer_service.close_from_user(reply_handler = self.__close_button_clicked_reply_cb, \
										  error_handler = self.__close_button_clicked_error_cb)

	@dbus.service.method("com.redhat.Sugar.Shell.ActivityHost", \
							 in_signature="", \
							 out_signature="t")
	def get_host_xembed_id(self):
		window_id = self.socket.get_id()
		#print "window_id = %d"%window_id
		return window_id

	def connect(self, signal, func):
		self._signal_helper.connect(signal, func)

	def get_shared(self):
		"""Return True if this activity is shared, False if
		it has not been shared yet."""
		return self._shared

	def _shared_signal(self):
		self._shared = True
		self._signal_helper.emit_shared()

	@dbus.service.method("com.redhat.Sugar.Shell.ActivityHost", \
			 in_signature="ss", \
			 out_signature="")
	def set_peer_service_name(self, peer_service_name, peer_object_name):
		#print "peer_service_name = %s, peer_object_name = %s"%(peer_service_name, peer_object_name)
		self.__peer_service_name = peer_service_name
		self.__peer_object_name = peer_object_name
		self.peer_service = dbus.Interface(self.activity_container.bus.get_object( \
				self.__peer_service_name, self.__peer_object_name), \
										   "com.redhat.Sugar.Activity")
		self.activity_container.bus.add_signal_receiver(self._shared_signal,
				signal_name="ActivityShared",
				dbus_interface="com.redhat.Sugar.Activity",
				named_service=self.__peer_service_name,
				path=self.__peer_object_name)

	@dbus.service.method("com.redhat.Sugar.Shell.ActivityHost", \
			 in_signature="b", \
			 out_signature="")
	def set_ellipsize_tab(self, ellipsize):
		self.ellipsize_tab = True
		self.update_tab_size()

	@dbus.service.method("com.redhat.Sugar.Shell.ActivityHost", \
			 in_signature="b", \
			 out_signature="")
	def set_can_close(self, can_close):
		if can_close:
			self.tab_close_button.show()
		else:
			self.tab_close_button.hide()

	@dbus.service.method("com.redhat.Sugar.Shell.ActivityHost", \
			 in_signature="b", \
			 out_signature="")
	def set_tab_show_icon(self, show_icon):
		if show_icon:
			self.tab_activity_image.show()
		else:
			self.tab_activity_image.hide()

	@dbus.service.method("com.redhat.Sugar.Shell.ActivityHost", \
			 in_signature="b", \
			 out_signature="")
	def set_has_changes(self, has_changes):
		if has_changes:
			attrs = pango.AttrList()
			attrs.insert(pango.AttrForeground(50000, 0, 0, 0, -1))
			attrs.insert(pango.AttrWeight(pango.WEIGHT_BOLD, 0, -1))
			self.tab_label.set_attributes(attrs)
		else:
			self.tab_label.set_attributes(pango.AttrList())

	@dbus.service.method("com.redhat.Sugar.Shell.ActivityHost", \
			 in_signature="s", \
			 out_signature="")
	def set_tab_text(self, text):
		self.tab_label.set_text(text)

	@dbus.service.method("com.redhat.Sugar.Shell.ActivityHost", \
			 in_signature="ayibiiii", \
			 out_signature="")
	def set_tab_icon(self, data, colorspace, has_alpha, bits_per_sample, width, height, rowstride):
	    #print "width=%d, height=%d"%(width, height)
		#print "  data = ", data
		pixstr = ""
		for c in data:
			# Work around for a bug in dbus < 0.61 where integers
			# are not correctly marshalled
			if c < 0:
				c += 256
			pixstr += chr(c)

		pixbuf = gtk.gdk.pixbuf_new_from_data(pixstr, colorspace, has_alpha, bits_per_sample, width, height, rowstride)
		#print pixbuf
		self.tab_activity_image.set_from_pixbuf(pixbuf)

	@dbus.service.method("com.redhat.Sugar.Shell.ActivityHost", \
						 in_signature="", \
						 out_signature="")
	def shutdown(self):
		#print "shutdown"
		for owner, activity in self.activity_container.activities[:]:
			if activity == self:
				self.activity_container.activities.remove((owner, activity))
				
		for i in range(self.activity_container.notebook.get_n_pages()):
			child = self.activity_container.notebook.get_nth_page(i)
			if child == self.socket:
				#print "found child"
				self.activity_container.notebook.remove_page(i)
				break

		del self

	def get_host_activity_id(self):
		"""Real function that the shell should use for getting the
		activity's ID."""
		return self.activity_id

	def get_id(self):
		"""Interface-type function to match activity.Activity's
		get_id() function."""
		return self.activity_id

	def default_type(self):
		"""Interface-type function to match activity.Activity's
		default_type() function."""
		return self._default_type

	def get_object_path(self):
		return self.dbus_object_name

	def update_tab_size(self):
		if self.ellipsize_tab:
			self.tab_label.set_ellipsize(pango.ELLIPSIZE_END)

			context = self.label_hbox.get_pango_context()
			font_desc = self.label_hbox.style.font_desc
			metrics = context.get_metrics(font_desc, context.get_language())
			char_width = metrics.get_approximate_digit_width()
			[w, h] = self.__get_close_icon_size()
			tab_width = 15 * pango.PIXELS(char_width) + 2 * w
			self.label_hbox.set_size_request(tab_width, -1);
		else:
			self.tab_label.set_ellipsize(pango.ELLIPSIZE_NONE)
			self.label_hbox.set_size_request(-1, -1)

	def __get_close_icon_size(self):
		settings = self.label_hbox.get_settings()
		return gtk.icon_size_lookup_for_settings(settings, gtk.ICON_SIZE_MENU)

	def __tab_label_style_set_cb(self, widget, previous_style):
		[w, h] = self.__get_close_icon_size()
		self.tab_close_button.set_size_request (w + 5, h + 2)
		self.update_tab_size()

class ActivityContainerSignalHelper(gobject.GObject):
	"""A gobject whose sole purpose is to distribute signals for
	an ActivityContainer object."""

	__gsignals__ = {
		'local-activity-started': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
						([gobject.TYPE_PYOBJECT, gobject.TYPE_PYOBJECT])),
		'local-activity-ended': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
						([gobject.TYPE_PYOBJECT, gobject.TYPE_PYOBJECT]))
	}

	def __init__(self, parent):
		gobject.GObject.__init__(self)
		self._parent = parent

	def activity_started(self, activity_id):
		self.emit('local-activity-started', self._parent, activity_id)

	def activity_ended(self, activity_id):
		self.emit('local-activity-ended', self._parent, activity_id)

class ActivityContainer(dbus.service.Object):

	def __init__(self, service, bus):
		self.activities = []

		self.bus = bus
		self.service = service

		self._signal_helper = ActivityContainerSignalHelper(self)

		dbus.service.Object.__init__(self, self.service, "/com/redhat/Sugar/Shell/ActivityContainer")
		bus.add_signal_receiver(self.name_owner_changed, dbus_interface = "org.freedesktop.DBus", signal_name = "NameOwnerChanged")

		self.window = gtk.Window()
		self.window.connect("key-press-event", self.__key_press_event_cb)
		self.window.set_title("OLPC Sugar")

		self._fullscreen = False

		self.notebook = gtk.Notebook()
		self.notebook.set_scrollable(True)

		tab_label = gtk.Label("Everyone")
		self._start_page = StartPage(self._signal_helper)
		self.notebook.append_page(self._start_page, tab_label)
		self._start_page.show()

		self.notebook.show()
		self.notebook.connect("switch-page", self.notebook_tab_changed)
		self.window.add(self.notebook)
		
		self.window.connect("destroy", lambda w: gtk.main_quit())
		
		self.current_activity = None

		# Create our owner service
		self._owner = ShellOwner()

		self._presence_window = PresenceWindow(self)
		self._presence_window.set_transient_for(self.window)
		self._presence_window.set_decorated(False)
		self._presence_window.set_type_hint(gtk.gdk.WINDOW_TYPE_HINT_DOCK)
		self._presence_window.set_skip_taskbar_hint(True)

		wm = WindowManager(self._presence_window)
	
		wm.set_width(170, WindowManager.ABSOLUTE)
		wm.set_height(1.0, WindowManager.SCREEN_RELATIVE)
		wm.set_position(WindowManager.LEFT)
		wm.manage()
		
		self._chat_window = ChatWindow()
		self._chat_window.set_transient_for(self.window)
		self._chat_window.set_type_hint(gtk.gdk.WINDOW_TYPE_HINT_DOCK)
		self._chat_window.set_decorated(False)
		self._chat_window.set_skip_taskbar_hint(True)

		self._chat_wm = WindowManager(self._chat_window)
		
		self._chat_wm.set_width(420, WindowManager.ABSOLUTE)
		self._chat_wm.set_height(380, WindowManager.ABSOLUTE)
		self._chat_wm.set_position(WindowManager.TOP)
		self._chat_wm.manage()
		
		self._mesh_chat = MeshChat()

	def show(self):
		self.window.show()

	def set_current_activity(self, activity):
		self.current_activity = activity
		self._presence_window.set_activity(activity)

		if activity:
			host_chat = activity.get_chat()
			self._chat_window.set_chat(host_chat)
		else:
			self._chat_window.set_chat(self._mesh_chat)

		# For some reason the substitution screw up window position
		self._chat_wm.update()

	def notebook_tab_changed(self, notebook, page, page_number):
		new_activity = notebook.get_nth_page(page_number).get_data("sugar-activity")

		if self.current_activity != None:
			self.current_activity.lost_focus()
		
		self.set_current_activity(new_activity)

		if self.current_activity != None:
			self.current_activity.got_focus()

	def name_owner_changed(self, service_name, old_service_name, new_service_name):
		#print "in name_owner_changed: svc=%s oldsvc=%s newsvc=%s"%(service_name, old_service_name, new_service_name)
		for owner, activity in self.activities[:]:
			if owner == old_service_name:
				activity_id = activity.get_host_activity_id()
				self._signal_helper.activity_ended(activity_id)
				self.activities.remove((owner, activity))
		#self.__print_activities()


	@dbus.service.method("com.redhat.Sugar.Shell.ActivityContainer", \
			 in_signature="ss", \
			 out_signature="s", \
			 sender_keyword="sender")
	def add_activity(self, activity_name, default_type, sender):
		#print "hello world, activity_name = '%s', sender = '%s'"%(activity_name, sender)
		activity = ActivityHost(self, activity_name, default_type)
		self.activities.append((sender, activity))

		activity_id = activity.get_host_activity_id()
		self._signal_helper.activity_started(activity_id)

		self.current_activity = activity
		return activity_id

	@dbus.service.method("com.redhat.Sugar.Shell.ActivityContainer", \
			 in_signature="sss", \
			 sender_keyword="sender")
	def add_activity_with_id(self, activity_name, default_type, activity_id, sender):
		activity = ActivityHost(self, activity_name, default_type, activity_id)
		self.activities.append((sender, activity))
		activity_id = activity.get_host_activity_id()
		self._signal_helper.activity_started(activity_id)
		self.current_activity = activity
		
	def __print_activities(self):
		print "__print_activities: %d activities registered" % len(self.activities)
		i = 0
		for owner, activity in self.activities:
			print "  %d: owner=%s activity_object_name=%s" % (i, owner, activity.dbus_object_name)
			i += 1
	
	def __key_press_event_cb(self, window, event):
		if event.keyval == gtk.keysyms.F11:
			if self._fullscreen:
				window.unfullscreen()
				self._fullscreen = False
			else:
				window.fullscreen()
				self._fullscreen = True			

class ConsoleLogger(dbus.service.Object):
	def __init__(self):
		session_bus = dbus.SessionBus()
		bus_name = dbus.service.BusName('com.redhat.Sugar.Logger', bus=session_bus)
		object_path = '/com/redhat/Sugar/Logger'
		dbus.service.Object.__init__(self, bus_name, object_path)

		self._window = gtk.Window()
		self._window.set_title("Console")
		self._window.set_type_hint(gtk.gdk.WINDOW_TYPE_HINT_DOCK)
		self._window.set_decorated(False)
		self._window.set_skip_taskbar_hint(True)
		self._window.connect("delete_event", lambda w, e: w.hide_on_delete())

		self._nb = gtk.Notebook()
		self._window.add(self._nb)
		self._nb.show()
				
		self._consoles = {}

		console_wm = WindowManager(self._window)
		
		console_wm.set_width(0.7, WindowManager.SCREEN_RELATIVE)
		console_wm.set_height(0.9, WindowManager.SCREEN_RELATIVE)
		console_wm.set_position(WindowManager.BOTTOM)
		console_wm.manage()

	def _create_console(self, application):
		sw = gtk.ScrolledWindow()
		sw.set_policy(gtk.POLICY_AUTOMATIC,
					  gtk.POLICY_AUTOMATIC)
		
		console = gtk.TextView()
		console.set_wrap_mode(gtk.WRAP_WORD)
		
		sw.add(console)
		console.show()
		
		self._nb.append_page(sw, gtk.Label(application))
		sw.show()
		
		return console

	@dbus.service.method('com.redhat.Sugar.Logger')
	def log(self, application, message):
		if self._consoles.has_key(application):
			console = self._consoles[application]
		else:
			console = self._create_console(application)
			self._consoles[application] = console
	
		buf = console.get_buffer() 
		buf.insert(buf.get_end_iter(), message)

class Shell(gobject.GObject):
	__gsignals__ = {
		'close': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
				 ([])),
	}

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

	def start(self):
		console = ConsoleLogger()

		log_writer = LogWriter("Shell", False)
		log_writer.start()

		session_bus = dbus.SessionBus()
		service = dbus.service.BusName("com.redhat.Sugar.Shell", bus=session_bus)

		activity_container = ActivityContainer(service, session_bus)
		activity_container.window.connect('destroy', self.__activity_container_destroy_cb)
		activity_container.show()

		wm = WindowManager(activity_container.window)
		wm.set_width(640, WindowManager.ABSOLUTE)
		wm.set_height(480, WindowManager.ABSOLUTE)
		wm.set_position(WindowManager.CENTER)
		wm.show()
		wm.manage()
		
	def __activity_container_destroy_cb(self, activity_container):
		self.emit('close')

if __name__ == "__main__":
	shell = Shell()
	shell.start()
	try:
		gtk.main()
	except KeyboardInterrupt:
		print 'Ctrl+c pressed, exiting...'