# -*- coding:utf-8 -*-
## src/common/gajim.py
##
## Copyright (C) 2003-2014 Yann Leboulanger <asterix AT lagaule.org>
## Copyright (C) 2005-2006 Dimitur Kirov <dkirov AT gmail.com>
##                         Travis Shirk <travis AT pobox.com>
##                         Nikos Kouremenos <kourem AT gmail.com>
## Copyright (C) 2006 Junglecow J <junglecow AT gmail.com>
##                    Stefan Bethge <stefan AT lanpartei.de>
## Copyright (C) 2006-2008 Jean-Marie Traissard <jim AT lapin.org>
## Copyright (C) 2007-2008 Brendan Taylor <whateley AT gmail.com>
##                         Stephan Erb <steve-e AT h3c.de>
## Copyright (C) 2008 Jonathan Schleifer <js-gajim AT webkeks.org>
##
## This file is part of Gajim.
##
## Gajim 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; version 3 only.
##
## Gajim 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 Gajim. If not, see <http://www.gnu.org/licenses/>.
##

import os
import logging
import locale
import gi
import uuid
from distutils.version import LooseVersion as V

from common import config
import nbxmpp
from common import ged as ged_module

interface = None # The actual interface (the gtk one for the moment)
thread_interface = None # Interface to run a thread and then a callback
config = config.Config()
version = config.get('version')
connections = {} # 'account name': 'account (connection.Connection) instance'
ipython_window = None
app = None  # Gtk.Application

ged = ged_module.GlobalEventsDispatcher() # Global Events Dispatcher
nec = None # Network Events Controller
plugin_manager = None # Plugins Manager

log = logging.getLogger('gajim')

logger = None

from common import configpaths
gajimpaths = configpaths.gajimpaths

VCARD_PATH = gajimpaths['VCARD']
AVATAR_PATH = gajimpaths['AVATAR']
MY_EMOTS_PATH = gajimpaths['MY_EMOTS']
MY_ICONSETS_PATH = gajimpaths['MY_ICONSETS']
MY_MOOD_ICONSETS_PATH = gajimpaths['MY_MOOD_ICONSETS']
MY_ACTIVITY_ICONSETS_PATH = gajimpaths['MY_ACTIVITY_ICONSETS']
MY_CACERTS = gajimpaths['MY_CACERTS']
MY_PEER_CERTS_PATH = gajimpaths['MY_PEER_CERTS']
TMP = gajimpaths['TMP']
DATA_DIR = gajimpaths['DATA']
ICONS_DIR = gajimpaths['ICONS']
HOME_DIR = gajimpaths['HOME']
PLUGINS_DIRS = [gajimpaths['PLUGINS_BASE'],
                gajimpaths['PLUGINS_USER']]
PLUGINS_CONFIG_DIR = gajimpaths['PLUGINS_CONFIG_DIR']
MY_CERT_DIR = gajimpaths['MY_CERT']

try:
    LANG = locale.getdefaultlocale()[0] # en_US, fr_FR, el_GR etc..
except (ValueError, locale.Error):
    # unknown locale, use en is better than fail
    LANG = None
if LANG is None:
    LANG = 'en'
else:
    LANG = LANG[:2] # en, fr, el etc..

os_info = None # used to cache os information

from common.contacts import LegacyContactsAPI
from common.events import Events

gmail_domains = ['gmail.com', 'googlemail.com']

transport_type = {} # list the type of transport

last_message_time = {} # list of time of the latest incomming message
                       # {acct1: {jid1: time1, jid2: time2}, }
encrypted_chats = {}   # list of encrypted chats {acct1: [jid1, jid2], ..}

contacts = LegacyContactsAPI()
gc_connected = {}    # tell if we are connected to the room or not
                     # {acct: {room_jid: True}}
gc_passwords = {}    # list of the pass required to enter a room
                     # {room_jid: password}
automatic_rooms = {} # list of rooms that must be automaticaly configured
                     # and for which we have a list of invities
                     #{account: {room_jid: {'invities': []}}}
new_room_nick = None # if it's != None, use this nick instead of asking for
                     # a new nickname when there is a conflict.

groups = {} # list of groups
newly_added = {} # list of contacts that has just signed in
to_be_removed = {} # list of contacts that has just signed out

events = Events()

notification = None

nicks = {} # list of our nick names in each account
# should we block 'contact signed in' notifications for this account?
# this is only for the first 30 seconds after we change our show
# to something else than offline
# can also contain account/transport_jid to block notifications for contacts
# from this transport
block_signed_in_notifications = {}
con_types = {} # type of each connection (ssl, tls, tcp, ...)

sleeper_state = {} # whether we pass auto away / xa or not
#'off': don't use sleeper for this account
#'online': online and use sleeper
#'autoaway': autoaway and use sleeper
#'autoxa': autoxa and use sleeper
status_before_autoaway = {}

# jid of transport contacts for which we need to ask avatar when transport will
# be online
transport_avatar = {} # {transport_jid: [jid_list]}

# Is Gnome configured to activate on single click ?
single_click = False
SHOW_LIST = ['offline', 'connecting', 'online', 'chat', 'away', 'xa', 'dnd',
        'invisible', 'error']

# zeroconf account name
ZEROCONF_ACC_NAME = 'Local'

# These will be set in gajim.gui_interface.
idlequeue = None
socks5queue = None

HAVE_ZEROCONF = True
try:
    __import__('avahi')
except ImportError:
    try:
        __import__('pybonjour')
    except Exception: # Linux raises ImportError, Windows raises WindowsError
        HAVE_ZEROCONF = False

HAVE_PYCRYPTO = True
try:
    __import__('Crypto')
except ImportError:
    HAVE_PYCRYPTO = False

HAVE_GPG = True
GPG_BINARY = 'gpg'
try:
    import gnupg
    '''
    We need https://pypi.python.org/pypi/python-gnupg
    but https://pypi.python.org/pypi/gnupg shares the same package name.
    It cannot be used as a drop-in replacement.
    We test with a version check if python-gnupg is installed as it is
    on a much lower version number than gnupg
    Also we need at least python-gnupg 0.3.8
    '''
    v_gnupg = gnupg.__version__
    if V(v_gnupg) < V('0.3.8') or V(v_gnupg) > V('1.0.0'):
        log.info('Gajim needs python-gnupg >= 0.3.8')
        HAVE_GPG = False
except ImportError:
    HAVE_GPG = False
else:
    import os
    import subprocess
    def test_gpg(binary='gpg'):
        if os.name == 'nt':
            gpg_cmd = binary + ' -h >nul 2>&1'
        else:
            gpg_cmd = binary + ' -h >/dev/null 2>&1'
        if subprocess.call(gpg_cmd, shell=True):
            return False
        return True
    if test_gpg(binary='gpg2'):
        GPG_BINARY = 'gpg2'
    if not test_gpg(binary='gpg'):
        HAVE_GPG = False

HAVE_PYOPENSSL = True
try:
    import OpenSSL.SSL
    import OpenSSL.crypto
    ver = OpenSSL.__version__
    ver_l = [int(i) for i in ver.split('.')]
    if ver_l < [0, 12]:
        raise ImportError
except Exception:
    HAVE_PYOPENSSL = False

HAVE_FARSTREAM = True
try:
    if os.name == 'nt':
        os.environ['FS_PLUGIN_PATH'] = 'gtk\\lib\\farstream-0.1'
        os.environ['GST_PLUGIN_PATH'] = 'gtk\\lib\\gstreamer-0.10'
    gi.require_version('Farstream', '0.2')
    from gi.repository import Farstream
    gi.require_version('Gst', '1.0')
    from gi.repository import Gst
    from gi.repository import GLib
    try:
        Gst.init(None)
        conference = Gst.ElementFactory.make('fsrtpconference', None)
        session = conference.new_session(Farstream.MediaType.AUDIO)
        del session
        del conference
    except GLib.GError:
        HAVE_FARSTREAM = False

except (ImportError, ValueError):
    HAVE_FARSTREAM = False

HAVE_UPNP_IGD = True
try:
    gi.require_version('GUPnPIgd', '1.0')
    from gi.repository import GUPnPIgd
    gupnp_igd = GUPnPIgd.SimpleIgd()
except ValueError:
    HAVE_UPNP_IGD = False

HAVE_PYCURL = True
try:
    __import__('pycurl')
except ImportError:
    HAVE_PYCURL = False


gajim_identity = {'type': 'pc', 'category': 'client', 'name': 'Gajim'}
gajim_common_features = [nbxmpp.NS_BYTESTREAM, nbxmpp.NS_SI, nbxmpp.NS_FILE,
    nbxmpp.NS_MUC, nbxmpp.NS_MUC_USER, nbxmpp.NS_MUC_ADMIN, nbxmpp.NS_MUC_OWNER,
    nbxmpp.NS_MUC_CONFIG, nbxmpp.NS_COMMANDS, nbxmpp.NS_DISCO_INFO, 'ipv6',
    'jabber:iq:gateway', nbxmpp.NS_LAST, nbxmpp.NS_PRIVACY, nbxmpp.NS_PRIVATE,
    nbxmpp.NS_REGISTER, nbxmpp.NS_VERSION, nbxmpp.NS_DATA, nbxmpp.NS_ENCRYPTED,
    'msglog', 'sslc2s', 'stringprep', nbxmpp.NS_PING, nbxmpp.NS_TIME_REVISED,
    nbxmpp.NS_SSN, nbxmpp.NS_MOOD, nbxmpp.NS_ACTIVITY, nbxmpp.NS_NICK,
    nbxmpp.NS_ROSTERX, nbxmpp.NS_SECLABEL, nbxmpp.NS_HASHES_2,
    nbxmpp.NS_HASHES_MD5, nbxmpp.NS_HASHES_SHA1, nbxmpp.NS_HASHES_SHA256,
    nbxmpp.NS_HASHES_SHA512, nbxmpp.NS_CONFERENCE, nbxmpp.NS_CORRECT]

# Optional features gajim supports per account
gajim_optional_features = {}

# Capabilities hash per account
caps_hash = {}

def get_an_id():
    return str(uuid.uuid4())

def get_nick_from_jid(jid):
    pos = jid.find('@')
    return jid[:pos]

def get_server_from_jid(jid):
    pos = jid.find('@') + 1 # after @
    return jid[pos:]

def get_name_and_server_from_jid(jid):
    name = get_nick_from_jid(jid)
    server = get_server_from_jid(jid)
    return name, server

def get_room_and_nick_from_fjid(jid):
    # fake jid is the jid for a contact in a room
    # gaim@conference.jabber.no/nick/nick-continued
    # return ('gaim@conference.jabber.no', 'nick/nick-continued')
    l = jid.split('/', 1)
    if len(l) == 1: # No nick
        l.append('')
    return l

def get_real_jid_from_fjid(account, fjid):
    """
    Return real jid or returns None, if we don't know the real jid
    """
    room_jid, nick = get_room_and_nick_from_fjid(fjid)
    if not nick: # It's not a fake_jid, it is a real jid
        return fjid # we return the real jid
    real_jid = fjid
    if interface.msg_win_mgr.get_gc_control(room_jid, account):
        # It's a pm, so if we have real jid it's in contact.jid
        gc_contact = contacts.get_gc_contact(account, room_jid, nick)
        if not gc_contact:
            return
        # gc_contact.jid is None when it's not a real jid (we don't know real jid)
        real_jid = gc_contact.jid
    return real_jid

def get_room_from_fjid(jid):
    return get_room_and_nick_from_fjid(jid)[0]

def get_contact_name_from_jid(account, jid):
    c = contacts.get_first_contact_from_jid(account, jid)
    return c.name

def get_jid_without_resource(jid):
    return jid.split('/')[0]

def construct_fjid(room_jid, nick):
    # fake jid is the jid for a contact in a room
    # gaim@conference.jabber.org/nick
    return room_jid + '/' + nick

def get_resource_from_jid(jid):
    jids = jid.split('/', 1)
    if len(jids) > 1:
        return jids[1] # abc@doremi.org/res/res-continued
    else:
        return ''

def get_number_of_accounts():
    """
    Return the number of ALL accounts
    """
    return len(connections.keys())

def get_number_of_connected_accounts(accounts_list = None):
    """
    Returns the number of CONNECTED accounts. Uou can optionally pass an
    accounts_list and if you do those will be checked, else all will be checked
    """
    connected_accounts = 0
    if accounts_list is None:
        accounts = connections.keys()
    else:
        accounts = accounts_list
    for account in accounts:
        if account_is_connected(account):
            connected_accounts = connected_accounts + 1
    return connected_accounts

def account_is_connected(account):
    if account not in connections:
        return False
    if connections[account].connected > 1: # 0 is offline, 1 is connecting
        return True
    else:
        return False

def account_is_disconnected(account):
    return not account_is_connected(account)

def zeroconf_is_connected():
    return account_is_connected(ZEROCONF_ACC_NAME) and \
            config.get_per('accounts', ZEROCONF_ACC_NAME, 'is_zeroconf')

def get_number_of_securely_connected_accounts():
    """
    Return the number of the accounts that are SSL/TLS connected
    """
    num_of_secured = 0
    for account in connections.keys():
        if account_is_securely_connected(account):
            num_of_secured += 1
    return num_of_secured

def account_is_securely_connected(account):
    if account_is_connected(account) and \
    account in con_types and con_types[account] in ('tls', 'ssl'):
        return True
    else:
        return False

def get_transport_name_from_jid(jid, use_config_setting = True):
    """
    Returns 'aim', 'gg', 'irc' etc

    If JID is not from transport returns None.
    """
    #FIXME: jid can be None! one TB I saw had this problem:
    # in the code block # it is a groupchat presence in handle_event_notify
    # jid was None. Yann why?
    if not jid or (use_config_setting and not config.get('use_transports_iconsets')):
        return

    host = get_server_from_jid(jid)
    if host in transport_type:
        return transport_type[host]

    # host is now f.e. icq.foo.org or just icq (sometimes on hacky transports)
    host_splitted = host.split('.')
    if len(host_splitted) != 0:
        # now we support both 'icq.' and 'icq' but not icqsucks.org
        host = host_splitted[0]

    if host in ('aim', 'irc', 'icq', 'msn', 'sms', 'tlen', 'weather', 'yahoo',
    'mrim', 'facebook'):
        return host
    elif host == 'gg':
        return 'gadu-gadu'
    elif host == 'jit':
        return 'icq'
    elif host == 'facebook':
        return 'facebook'
    else:
        return None

def jid_is_transport(jid):
    # if not '@' or '@' starts the jid then it is transport
    if jid.find('@') <= 0:
        return True
    return False

def get_jid_from_account(account_name, full=False):
    """
    Return the jid we use in the given account
    """
    name = config.get_per('accounts', account_name, 'name')
    hostname = config.get_per('accounts', account_name, 'hostname')
    jid = name + '@' + hostname
    if full:
        resource = connections[account_name].server_resource
        jid += '/' + resource
    return jid

def get_our_jids():
    """
    Returns a list of the jids we use in our accounts
    """
    our_jids = list()
    for account in contacts.get_accounts():
        our_jids.append(get_jid_from_account(account))
    return our_jids

def get_hostname_from_account(account_name, use_srv = False):
    """
    Returns hostname (if custom hostname is used, that is returned)
    """
    if use_srv and connections[account_name].connected_hostname:
        return connections[account_name].connected_hostname
    if config.get_per('accounts', account_name, 'use_custom_host'):
        return config.get_per('accounts', account_name, 'custom_host')
    return config.get_per('accounts', account_name, 'hostname')

def get_notification_image_prefix(jid):
    """
    Returns the prefix for the notification images
    """
    transport_name = get_transport_name_from_jid(jid)
    if transport_name in ('aim', 'icq', 'msn', 'yahoo', 'facebook'):
        prefix = transport_name
    else:
        prefix = 'jabber'
    return prefix

def get_name_from_jid(account, jid):
    """
    Return from JID's shown name and if no contact returns jids
    """
    contact = contacts.get_first_contact_from_jid(account, jid)
    if contact:
        actor = contact.get_shown_name()
    else:
        actor = jid
    return actor

def get_priority(account, show):
    """
    Return the priority an account must have
    """
    if not show:
        show = 'online'

    if show in ('online', 'chat', 'away', 'xa', 'dnd', 'invisible') and \
    config.get_per('accounts', account, 'adjust_priority_with_status'):
        prio = config.get_per('accounts', account, 'autopriority_' + show)
    else:
        prio = config.get_per('accounts', account, 'priority')
    if prio < -128:
        prio = -128
    elif prio > 127:
        prio = 127
    return prio