# Copyright (C) 2006, Red Hat, Inc.
# Copyright (C) 2009 Martin Langhoff, Simon Schampijer, Daniel Drake,
#                    Tomeu Vizoso
#
# 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 logging
from gettext import gettext as _
from gettext import ngettext
import os

from gi.repository import GObject
GObject.threads_init()

from gi.repository import Gtk
from gi.repository import Gdk
from gi.repository import GdkPixbuf
from gi.repository import WebKit

import base64
import time
import shutil
import sqlite3
import json
from gi.repository import GConf
import locale
import cairo
import StringIO
from hashlib import sha1

from sugar3.activity import activity
from sugar3.graphics import style
import telepathy
import telepathy.client
from sugar3.presence import presenceservice
from sugar3.graphics.tray import HTray
from sugar3 import profile
from sugar3.graphics.alert import Alert
from sugar3.graphics.icon import Icon
from sugar3 import mime

from sugar3.graphics.toolbarbox import ToolbarButton

PROFILE_VERSION = 2

_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()


def _seed_xs_cookie():
    ''' Create a HTTP Cookie to authenticate with the Schoolserver
    '''
    client = GConf.Client.get_default()
    backup_url = client.get_string('/desktop/sugar/backup_url')
    if not backup_url:
        _logger.debug('seed_xs_cookie: Not registered with Schoolserver')
        return

    jabber_server = client.get_string(
        '/desktop/sugar/collaboration/jabber_server')

    pubkey = profile.get_profile().pubkey
    cookie_data = {'color': profile.get_color().to_string(),
                   'pkey_hash': sha1(pubkey).hexdigest()}

    db_path = os.path.join(_profile_path, 'cookies.sqlite')
    try:
        cookies_db = sqlite3.connect(db_path)
        c = cookies_db.cursor()

        c.execute('''CREATE TABLE IF NOT EXISTS
                     moz_cookies
                     (id INTEGER PRIMARY KEY,
                      name TEXT,
                      value TEXT,
                      host TEXT,
                      path TEXT,
                      expiry INTEGER,
                      lastAccessed INTEGER,
                      isSecure INTEGER,
                      isHttpOnly INTEGER)''')

        c.execute('''SELECT id
                     FROM moz_cookies
                     WHERE name=? AND host=? AND path=?''',
                  ('xoid', jabber_server, '/'))

        if c.fetchone():
            _logger.debug('seed_xs_cookie: Cookie exists already')
            return

        expire = int(time.time()) + 10 * 365 * 24 * 60 * 60
        c.execute('''INSERT INTO moz_cookies (name, value, host,
                                              path, expiry, lastAccessed,
                                              isSecure, isHttpOnly)
                     VALUES(?,?,?,?,?,?,?,?)''',
                  ('xoid', json.loads(cookie_data), jabber_server,
                   '/', expire, 0, 0, 0))
        cookies_db.commit()
        cookies_db.close()
    except sqlite3.Error:
        _logger.exception('seed_xs_cookie: could not write cookie')
    else:
        _logger.debug('seed_xs_cookie: Updated cookie successfully')


def _set_char_preference(name, value):
    cls = components.classes["@mozilla.org/preferences-service;1"]
    prefService = cls.getService(components.interfaces.nsIPrefService)
    branch = prefService.getBranch('')
    branch.setCharPref(name, value)


from browser import TabbedView
from webtoolbar import PrimaryToolbar
from edittoolbar import EditToolbar
from viewtoolbar import ViewToolbar
import downloadmanager

# TODO: make the registration clearer SL #3087
# import filepicker  # pylint: disable=W0611

from model import Model
from sugar3.presence.tubeconn import TubeConnection
from messenger import Messenger
from linkbutton import LinkButton

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

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


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

        _logger.debug('Starting the web activity')

        session = WebKit.get_default_session()
        session.set_property('accept-language-auto', True)

        # FIXME
        # downloadmanager.remove_old_parts()

        self._force_close = False
        self._tabbed_view = TabbedView()
        self._tabbed_view.connect('focus-url-entry', self._on_focus_url_entry)

        _seed_xs_cookie()

        # HACK
        # Currently, the multiple tabs feature crashes the Browse activity
        # on cairo versions 1.8.10 or later. The exact cause for this
        # isn't exactly known. Thus, disable the multiple tabs feature
        # if we come across cairo versions >= 1.08.10 and < 11000
        # More information can be found here:
        # http://lists.sugarlabs.org/archive/sugar-devel/2010-July/025187.html
        self._disable_multiple_tabs = cairo.cairo_version() >= 10810\
                        and cairo.cairo_version() < 11000
        if self._disable_multiple_tabs:
            logging.warning('Not enabling the multiple tabs feature due'
                ' to a bug in cairo/mozilla')

        self._tray = HTray()
        self.set_tray(self._tray, Gtk.PositionType.BOTTOM)
        self._tray.show()

        self._primary_toolbar = PrimaryToolbar(self._tabbed_view, self)
        self._edit_toolbar = EditToolbar(self)
        self._view_toolbar = ViewToolbar(self)

        self._primary_toolbar.connect('add-link', self._link_add_button_cb)

        self._primary_toolbar.connect('go-home', self._go_home_button_cb)

        self._edit_toolbar_button = ToolbarButton(
                page=self._edit_toolbar,
                icon_name='toolbar-edit')
        self._primary_toolbar.toolbar.insert(
                self._edit_toolbar_button, 1)

        view_toolbar_button = ToolbarButton(
                page=self._view_toolbar,
                icon_name='toolbar-view')
        self._primary_toolbar.toolbar.insert(
                view_toolbar_button, 2)

        self._primary_toolbar.show_all()
        self.set_toolbar_box(self._primary_toolbar)

        self.set_canvas(self._tabbed_view)
        self._tabbed_view.show()

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

        self.connect('key-press-event', self._key_press_cb)

        if handle.uri:
            self._tabbed_view.current_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._tabbed_view.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.get_shared_activity() is not None:
            _logger.debug('shared: %s', self.get_shared())
            # 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 _on_focus_url_entry(self, gobject):
        self._primary_toolbar.entry.grab_focus()

    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...')
        self.tubes_chan[telepathy.CHANNEL_TYPE_TUBES].OfferDBusTube(SERVICE,
                                                                    {})

    def _setup(self):
        if self.get_shared_activity() is None:
            _logger.debug('Failed to share or join activity')
            return

        bus_name, conn_path, channel_paths = \
                self.get_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.get_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, identifier, initiator, type, service, params,
                     state):
        _logger.debug('New tube: ID=%d initator=%d type=%d service=%s '
                      'params=%r state=%d', identifier, 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(
                        identifier)

            self.tube_conn = TubeConnection(self.conn,
                self.tubes_chan[telepathy.CHANNEL_TYPE_TUBES],
                identifier, group_iface=self.text_chan[
                    telepathy.CHANNEL_INTERFACE_GROUP])

            _logger.debug('Tube created')
            self.messenger = Messenger(self.tube_conn, self.initiating,
                                       self.model)

    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'])
            logging.debug('########## reading %s', data)
            self._tabbed_view.set_history(self.model.data['history'])
            for number, tab in enumerate(self.model.data['currents']):
                tab_page = self._tabbed_view.get_nth_page(number)
                tab_page.browser.set_history_index(tab['history_index'])

            self._tabbed_view.set_current_page(self.model.data['current_tab'])
        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._tabbed_view.props.current_browser.load_uri(uris[0])
            else:
                _logger.error('Open uri-list: Does not support'
                              'list of multiple uris by now.')
        else:
            file_uri = 'file://' + file_path
            self._tabbed_view.props.current_browser.load_uri(file_uri)

    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':

            browser = self._tabbed_view.current_browser

            if not self._jobject.metadata['title_set_by_user'] == '1':
                if browser.props.title is None:
                    self.metadata['title'] = _('Untitled')
                else:
                    self.metadata['title'] = browser.props.title

            self.model.data['history'] = self._tabbed_view.get_history()
            current_tab = self._tabbed_view.get_current_page()
            self.model.data['current_tab'] = current_tab

            self.model.data['currents'] = []
            for n in range(0, self._tabbed_view.get_n_pages()):
                tab_page = self._tabbed_view.get_nth_page(n)
                n_browser = tab_page.browser
                if n_browser != None:
                    uri = n_browser.get_uri()
                    history_index = n_browser.get_history_index()
                    info = {'title': n_browser.props.title, 'url': uri,
                            'history_index': history_index}

                    self.model.data['currents'].append(info)

            f = open(file_path, 'w')
            try:
                logging.debug('########## writing %s', self.model.serialize())
                f.write(self.model.serialize())
            finally:
                f.close()

    def _link_add_button_cb(self, button):
        self._add_link()

    def _go_home_button_cb(self, button):
        self._tabbed_view.load_homepage()

    def _key_press_cb(self, widget, event):
        key_name = Gdk.keyval_name(event.keyval)
        browser = self._tabbed_view.props.current_browser

        if event.get_state() & Gdk.ModifierType.CONTROL_MASK:

            if key_name == 'd':
                self._add_link()
            elif key_name == 'f':
                _logger.debug('keyboard: Find')
                self._edit_toolbar_button.set_expanded(True)
                self._edit_toolbar.search_entry.grab_focus()
            elif key_name == 'l':
                _logger.debug('keyboard: Focus url entry')
                self._primary_toolbar.entry.grab_focus()
            elif key_name == 'minus':
                _logger.debug('keyboard: Zoom out')
                browser.zoom_out()
            elif key_name in ['plus', 'equal']:
                _logger.debug('keyboard: Zoom in')
                browser.zoom_in()
            elif key_name == 'Left':
                _logger.debug('keyboard: Go back')
                browser.go_back()
            elif key_name == 'Right':
                _logger.debug('keyboard: Go forward')
                browser.go_forward()
            elif key_name == 'r':
                _logger.debug('keyboard: Reload')
                browser.reload()
            elif Gdk.keyval_name(event.keyval) == "t":
                if not self._disable_multiple_tabs:
                    self._tabbed_view.add_tab()
            else:
                return False

            return True

        return False

    def _add_link(self):
        ''' take screenshot and add link info to the model '''

        browser = self._tabbed_view.props.current_browser
        ui_uri = browser.get_uri()

        for link in self.model.data['shared_links']:
            if link['hash'] == sha1(ui_uri).hexdigest():
                _logger.debug('_add_link: link exist already a=%s b=%s',
                              link['hash'], sha1(ui_uri).hexdigest())
                return
        buf = self._get_screenshot()
        timestamp = time.time()
        self.model.add_link(ui_uri, browser.props.title, buf,
                            profile.get_nick_name(),
                            profile.get_color().to_string(), timestamp)

        if self.messenger is not None:
            self.messenger._add_link(ui_uri, browser.props.title,
                                     profile.get_color().to_string(),
                                     profile.get_nick_name(),
                                     base64.b64encode(buf), 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, buf, color, title, owner, index, hash):
        ''' add a link to the tray '''
        item = LinkButton(buf, color, title, owner, hash)
        item.connect('clicked', self._link_clicked_cb, url)
        item.connect('remove_link', self._link_removed_cb)
        # use index to add to the tray
        self._tray.add_item(item, index)
        item.show()
        if self._tray.props.visible is False:
            self._tray.show()
        self._view_toolbar.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._view_toolbar.traybutton.props.sensitive = False

    def _link_clicked_cb(self, button, url):
        ''' an item of the link tray has been clicked '''
        self._tabbed_view.props.current_browser.load_uri(url)

    def _get_screenshot(self):
        browser = self._tabbed_view.props.current_browser
        window = browser.get_window()
        width, height = window.get_width(), window.get_height()

        thumb_width, thumb_height = style.zoom(100), style.zoom(80)

        thumb_surface = Gdk.Window.create_similar_surface(window,
            cairo.CONTENT_COLOR, thumb_width, thumb_height)

        cairo_context = cairo.Context(thumb_surface)
        thumb_scale_w = thumb_width * 1.0 / width
        thumb_scale_h = thumb_height * 1.0 / height
        cairo_context.scale(thumb_scale_w, thumb_scale_h)
        Gdk.cairo_set_source_window(cairo_context, window, 0, 0)
        cairo_context.paint()

        thumb_str = StringIO.StringIO()
        thumb_surface.write_to_png(thumb_str)
        return thumb_str.getvalue()

    def can_close(self):
        if self._force_close:
            return True
        elif downloadmanager.can_quit():
            return True
        else:
            alert = Alert()
            alert.props.title = ngettext('Download in progress',
                                         'Downloads in progress',
                                         downloadmanager.num_downloads())
            message = ngettext('Stopping now will erase your download',
                               'Stopping now will erase your downloads',
                               downloadmanager.num_downloads())
            alert.props.msg = message
            cancel_icon = Icon(icon_name='dialog-cancel')
            cancel_label = ngettext('Continue download', 'Continue downloads',
                                    downloadmanager.num_downloads())
            alert.add_button(Gtk.ResponseType.CANCEL, cancel_label,
                             cancel_icon)
            stop_icon = Icon(icon_name='dialog-ok')
            alert.add_button(Gtk.ResponseType.OK, _('Stop'), stop_icon)
            stop_icon.show()
            self.add_alert(alert)
            alert.connect('response', self.__inprogress_response_cb)
            alert.show()
            self.present()
            return False

    def __inprogress_response_cb(self, alert, response_id):
        self.remove_alert(alert)
        if response_id is Gtk.ResponseType.CANCEL:
            logging.debug('Keep on')
        elif response_id == Gtk.ResponseType.OK:
            logging.debug('Stop downloads and quit')
            self._force_close = True
            downloadmanager.remove_all_downloads()
            self.close()

    def get_document_path(self, async_cb, async_err_cb):
        browser = self._tabbed_view.props.current_browser
        browser.get_source(async_cb, async_err_cb)

    def get_canvas(self):
        return self._tabbed_view