# 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 os
import logging
from gettext import gettext as _

import gtk
import sha
import base64
import time
import shutil
 
from sugar.activity import activity
from sugar.graphics import style
import telepathy
import telepathy.client
from sugar.presence import presenceservice
from sugar.graphics.tray import HTray
from sugar import profile
from sugar.graphics.alert import Alert
from sugar.graphics.icon import Icon
from sugar import mime

PROFILE_VERSION = 1

_profile_version = 0
_profile_path = os.path.join(activity.get_activity_root(), 'data/gecko')
_version_file = os.path.join(_profile_path, 'version')

if os.path.exists(_version_file):
    f = open(_version_file)
    _profile_version = int(f.read())
    f.close()

if _profile_version < PROFILE_VERSION:
    if not os.path.exists(_profile_path):
        os.mkdir(_profile_path)

    shutil.copy('cert8.db', _profile_path)
    os.chmod(os.path.join(_profile_path, 'cert8.db'), 0660)

    f = open(_version_file, 'w')
    f.write(str(PROFILE_VERSION))
    f.close()

import hulahop
hulahop.startup(_profile_path)

from browser import Browser
from webtoolbar import WebToolbar
from viewtoolbar import ViewToolbar
import downloadmanager
import sessionhistory 
import progresslistener

_LIBRARY_PATH = '/usr/share/library-common/index.html'

from model import Model
from sugar.presence.tubeconn import TubeConnection
from messenger import Messenger
from linkbutton import LinkButton

SERVICE = "org.laptop.WebActivity"
IFACE = SERVICE
PATH = "/org/laptop/WebActivity"

_TOOLBAR_BROWSE = 1

_logger = logging.getLogger('web-activity')

class WebActivity(activity.Activity):
    def __init__(self, handle):
        activity.Activity.__init__(self, handle)

        _logger.debug('Starting the web activity')

        self._browser = Browser()

        temp_path = os.path.join(self.get_activity_root(), 'instance')
        downloadmanager.init(self._browser, self, temp_path)
        sessionhistory.init(self._browser)
        progresslistener.init(self._browser)

        toolbox = activity.ActivityToolbox(self)
        activity_toolbar = toolbox.get_activity_toolbar()

        self.toolbar = WebToolbar(self._browser)
        toolbox.add_toolbar(_('Browse'), self.toolbar)
        self.toolbar.show()
       
        self._tray = HTray()
        self.set_tray(self._tray, gtk.POS_BOTTOM)
        self._tray.show()
        
        self.viewtoolbar = ViewToolbar(self)
        toolbox.add_toolbar(_('View'), self.viewtoolbar)
        self.viewtoolbar.show()

        self.set_toolbox(toolbox)
        toolbox.show()

        self.set_canvas(self._browser)
        self._browser.show()
                 
        self.session_history = sessionhistory.get_instance()
        self.session_history.connect('session-link-changed', self._session_history_changed_cb)
        self.toolbar.connect('add-link', self._link_add_button_cb)

        self._browser.connect("notify::title", self._title_changed_cb)

        self.model = Model()
        self.model.connect('add_link', self._add_link_model_cb)

        self.current = _('blank')
        self.webtitle = _('blank')
        self.connect('key-press-event', self._key_press_cb)
                     
        self.toolbox.set_current_toolbar(_TOOLBAR_BROWSE)
        
        if handle.uri:
            self._browser.load_uri(handle.uri)        
        elif not self._jobject.file_path:
            # TODO: we need this hack until we extend the activity API for
            # opening URIs and default docs.
            self._load_homepage()

        self.messenger = None
        self.connect('shared', self._shared_cb)

        # Get the Presence Service        
        self.pservice = presenceservice.get_instance()
        try:
            name, path = self.pservice.get_preferred_connection()
            self.tp_conn_name = name
            self.tp_conn_path = path
            self.conn = telepathy.client.Connection(name, path)
        except TypeError:
            _logger.debug('Offline')
        self.initiating = None
            
        if self._shared_activity is not None:
            _logger.debug('shared:  %s' %self._shared_activity.props.joined)

        if self._shared_activity is not None:
            # We are joining the activity
            _logger.debug('Joined activity')                      
            self.connect('joined', self._joined_cb)
            if self.get_shared():
                # We've already joined
                self._joined_cb()
        else:   
            _logger.debug('Created activity')
    
    def _shared_cb(self, activity):
        _logger.debug('My activity was shared')        
        self.initiating = True                        
        self._setup()

        _logger.debug('This is my activity: making a tube...')
        id = self.tubes_chan[telepathy.CHANNEL_TYPE_TUBES].OfferDBusTube(
                SERVICE, {})
                
    def _setup(self):
        if self._shared_activity is None:
            _logger.debug('Failed to share or join activity')
            return

        bus_name, conn_path, channel_paths = self._shared_activity.get_channels()

        # Work out what our room is called and whether we have Tubes already
        room = None
        tubes_chan = None
        text_chan = None
        for channel_path in channel_paths:
            channel = telepathy.client.Channel(bus_name, channel_path)
            htype, handle = channel.GetHandle()
            if htype == telepathy.HANDLE_TYPE_ROOM:
                _logger.debug('Found our room: it has handle#%d "%s"' 
                    %(handle, self.conn.InspectHandles(htype, [handle])[0]))
                room = handle
                ctype = channel.GetChannelType()
                if ctype == telepathy.CHANNEL_TYPE_TUBES:
                    _logger.debug('Found our Tubes channel at %s'%channel_path)
                    tubes_chan = channel
                elif ctype == telepathy.CHANNEL_TYPE_TEXT:
                    _logger.debug('Found our Text channel at %s'%channel_path)
                    text_chan = channel

        if room is None:
            _logger.debug("Presence service didn't create a room")
            return
        if text_chan is None:
            _logger.debug("Presence service didn't create a text channel")
            return

        # Make sure we have a Tubes channel - PS doesn't yet provide one
        if tubes_chan is None:
            _logger.debug("Didn't find our Tubes channel, requesting one...")
            tubes_chan = self.conn.request_channel(telepathy.CHANNEL_TYPE_TUBES, 
                                                   telepathy.HANDLE_TYPE_ROOM, room, True)

        self.tubes_chan = tubes_chan
        self.text_chan = text_chan

        tubes_chan[telepathy.CHANNEL_TYPE_TUBES].connect_to_signal('NewTube', 
                                                                   self._new_tube_cb)

    def _list_tubes_reply_cb(self, tubes):
        for tube_info in tubes:
            self._new_tube_cb(*tube_info)

    def _list_tubes_error_cb(self, e):
        _logger.debug('ListTubes() failed: %s'%e)

    def _joined_cb(self, activity):
        if not self._shared_activity:
            return

        _logger.debug('Joined an existing shared activity')
        
        self.initiating = False
        self._setup()
                
        _logger.debug('This is not my activity: waiting for a tube...')
        self.tubes_chan[telepathy.CHANNEL_TYPE_TUBES].ListTubes(
            reply_handler=self._list_tubes_reply_cb, 
            error_handler=self._list_tubes_error_cb)

    def _new_tube_cb(self, id, initiator, type, service, params, state):
        _logger.debug('New tube: ID=%d initator=%d type=%d service=%s '
                     'params=%r state=%d' %(id, initiator, type, service, 
                     params, state))

        if (type == telepathy.TUBE_TYPE_DBUS and
            service == SERVICE):
            if state == telepathy.TUBE_STATE_LOCAL_PENDING:
                self.tubes_chan[telepathy.CHANNEL_TYPE_TUBES].AcceptDBusTube(id)

            self.tube_conn = TubeConnection(self.conn, 
                self.tubes_chan[telepathy.CHANNEL_TYPE_TUBES], 
                id, group_iface=self.text_chan[telepathy.CHANNEL_INTERFACE_GROUP])
            
            _logger.debug('Tube created')
            self.messenger = Messenger(self.tube_conn, self.initiating, self.model)         

             
    def _load_homepage(self):
        if os.path.isfile(_LIBRARY_PATH):
            self._browser.load_uri('file://' + _LIBRARY_PATH)
        else:
            self._browser.load_uri('about:blank')

    def _session_history_changed_cb(self, session_history, link):
        _logger.debug('NewPage: %s.' %link)
        self.current = link
        
    def _title_changed_cb(self, embed, pspec):
        if embed.props.title is not '':
            _logger.debug('Title changed=%s' % embed.props.title)
            self.webtitle = embed.props.title

    def _get_data_from_file_path(self, file_path):
        fd = open(file_path, 'r')
        try:
            data = fd.read()
        finally:
            fd.close()
        return data

    def read_file(self, file_path):
        if self.metadata['mime_type'] == 'text/plain':
            data = self._get_data_from_file_path(file_path)
            self.model.deserialize(data)
            
            for link in self.model.data['shared_links']:
                _logger.debug('read: url=%s title=%s d=%s' % (link['url'],
                                                              link['title'],
                                                              link['color']))
                self._add_link_totray(link['url'],
                                      base64.b64decode(link['thumb']),
                                      link['color'], link['title'],
                                      link['owner'], -1, link['hash'])                                
            self._browser.set_session(self.model.data['history'])
        elif self.metadata['mime_type'] == 'text/uri-list':
            data = self._get_data_from_file_path(file_path)
            uris = mime.split_uri_list(data)
            if len(uris) == 1:
                self._browser.load_uri(uris[0])
            else:
                _logger.error('Open uri-list: Does not support' 
                              'list of multiple uris by now.') 
        else:
            self._browser.load_uri(file_path)
        
    def write_file(self, file_path):
        if not self.metadata['mime_type']:
            self.metadata['mime_type'] = 'text/plain'
        
        if self.metadata['mime_type'] == 'text/plain':
            if not self._jobject.metadata['title_set_by_user'] == '1':
                if self._browser.props.title:
                    self.metadata['title'] = self._browser.props.title

            self.model.data['history'] = self._browser.get_session()

            f = open(file_path, 'w')
            try:
                f.write(self.model.serialize())
            finally:
                f.close()

    def _link_add_button_cb(self, button):
        _logger.debug('button: Add link: %s.' % self.current)                
        self._add_link()
            
    def _key_press_cb(self, widget, event):
        if event.state & gtk.gdk.CONTROL_MASK:
            if gtk.gdk.keyval_name(event.keyval) == "l":
                _logger.debug('keyboard: Add link: %s.' % self.current)                
                self._add_link()                
                return True
            elif gtk.gdk.keyval_name(event.keyval) == "u":
                _logger.debug('keyboard: Show source of the current page')
                self._show_source()
                return True
            elif gtk.gdk.keyval_name(event.keyval) == "minus":
                _logger.debug('keyboard: Zoom out')
                self._browser.zoom_out()
                return True
            elif gtk.gdk.keyval_name(event.keyval) == "plus" \
                     or gtk.gdk.keyval_name(event.keyval) == "equal" :
                _logger.debug('keyboard: Zoom in')
                self._browser.zoom_in()
                return True
        elif gtk.gdk.keyval_name(event.keyval) == "XF86Start":
            _logger.debug('keyboard: Show source of the current page SHOW_KEY')
            self._show_source()
            return True
        return False

    def _add_link(self):
        ''' take screenshot and add link info to the model '''
        for link in self.model.data['shared_links']:
            if link['hash'] == sha.new(self.current).hexdigest():
                _logger.debug('_add_link: link exist already a=%s b=%s' %(
                    link['hash'], sha.new(self.current).hexdigest()))
                return
        buffer = self._get_screenshot()
        timestamp = time.time()
        self.model.add_link(self.current, self.webtitle, buffer,
                            profile.get_nick_name(),
                            profile.get_color().to_string(), timestamp)

        if self.messenger is not None:
            self.messenger._add_link(self.current, self.webtitle,                                     
                                     profile.get_color().to_string(),
                                     profile.get_nick_name(),
                                     base64.b64encode(buffer), timestamp)

    def _add_link_model_cb(self, model, index):
        ''' receive index of new link from the model '''
        link = self.model.data['shared_links'][index]
        self._add_link_totray(link['url'], base64.b64decode(link['thumb']),
                              link['color'], link['title'],
                              link['owner'], index, link['hash'])

    def _add_link_totray(self, url, buffer, color, title, owner, index, hash):
        ''' add a link to the tray '''
        item = LinkButton(url, buffer, color, title, owner, index, hash)
        item.connect('clicked', self._link_clicked_cb, url)
        item.connect('remove_link', self._link_removed_cb)
        self._tray.add_item(item, index) # use index to add to the tray
        item.show()
        if self._tray.props.visible is False:
            self._tray.show()        
        self.viewtoolbar.traybutton.props.sensitive = True
        
    def _link_removed_cb(self, button, hash):
        ''' remove a link from tray and delete it in the model '''
        self.model.remove_link(hash)
        self._tray.remove_item(button)
        if len(self._tray.get_children()) == 0:
            self.viewtoolbar.traybutton.props.sensitive = False

    def _link_clicked_cb(self, button, url):
        ''' an item of the link tray has been clicked '''
        self._browser.load_uri(url)
                
    def _show_source(self):
        self._browser.get_source()

    def _pixbuf_save_cb(self, buf, data):
        data[0] += buf
        return True

    def get_buffer(self, pixbuf):
        data = [""]
        pixbuf.save_to_callback(self._pixbuf_save_cb, "png", {}, data)
        return str(data[0])

    def _get_screenshot(self):
        window = self._browser.window
        width, height = window.get_size()

        screenshot = gtk.gdk.Pixbuf(gtk.gdk.COLORSPACE_RGB, has_alpha=False,
                                    bits_per_sample=8, width=width,
                                    height=height)
        screenshot.get_from_drawable(window, window.get_colormap(), 0, 0, 0, 0,
                                     width, height)

        screenshot = screenshot.scale_simple(style.zoom(100),
                                                 style.zoom(80),
                                                 gtk.gdk.INTERP_BILINEAR)

        buffer = self.get_buffer(screenshot)
        return buffer

    def close(self):
        if downloadmanager.can_quit():
            activity.Activity.close(self)        
        else:
            logging.debug('Close is called')
            alert = Alert()
            alert.props.title = _('Download in progress')
            alert.props.msg = _('Stopping now will cancel your download')
            cancel_icon = Icon(icon_name='dialog-cancel')
            alert.add_button(gtk.RESPONSE_CANCEL, _('Cancel'), cancel_icon)
            stop_icon = Icon(icon_name='dialog-ok')
            alert.add_button(gtk.RESPONSE_OK, _('Stop'), stop_icon)
            stop_icon.show()
            self.add_alert(alert)
            alert.connect('response', self.__inprogress_response_cb)
            alert.show()            
            self.present()
            
    def __inprogress_response_cb(self, alert, response_id):
        self.remove_alert(alert)
        if response_id is gtk.RESPONSE_CANCEL:
            logging.debug('Keep on')
        elif response_id == gtk.RESPONSE_OK:
            logging.debug('Stop downloads and quit')
            downloadmanager.remove_all_downloads()
            activity.Activity.close(self)