# Copyright (C) 2010 Matthew McGowan
#
# Authors:
#  Matthew McGowan
#  Michael Vogt
#
# 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; version 3.
#
# 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 Street, Fifth Floor, Boston, MA 02110-1301 USA

import dbus
import logging
from xdg import BaseDirectory as xdg
import os.path
import json
import sys
from random import random


class GwibberHelper(object):
    """ A helper class for gwibber. ideally we would just use
        from gi.repository import Gwibber
        accounts = Gwibbers.Accounts()
        accounts.list()
        ...
        instead of the dbus iface, but the gi stuff fails
        to export "Accounts.list()" (and possible more) currently
    """

    def accounts(self):
        """ returns accounts that are send_enabled """
        accounts = []
        try:
            bus = dbus.SessionBus()
            proxy_obj = bus.get_object("com.Gwibber.Accounts",
                                       "/com/gwibber/Accounts")
            accounts_iface = dbus.Interface(proxy_obj, "com.Gwibber.Accounts")
            for account in json.loads(accounts_iface.List()):
                if 'send_enabled' in account and account["send_enabled"]:
                    accounts.append(account)
            return accounts
        except:
            logging.exception("GwibberHelper.accounts() failed")
            return accounts

    def send_message(self, message, account_id=None):
        """ send message to all accounts with send_enabled """
        bus = dbus.SessionBus()
        proxy_obj = bus.get_object("com.Gwibber.Service",
                                   "/com/gwibber/Service")
        service_iface = dbus.Interface(proxy_obj, "com.Gwibber.Service")
        if account_id:
            json_str = json.dumps({'message': message,
                                   'accounts': [account_id],
                                   })
            service_iface.Send(json_str)
        else:
            service_iface.SendMessage(message)
        return True

    @staticmethod
    def has_accounts_in_sqlite():
        """ return if there are accounts for gwibber in sqlite """
        # don't use dbus, triggers a gwibber start each time we call this
        dbpath = "%s/gwibber/gwibber.sqlite" % xdg.xdg_config_home
        if not os.path.exists(dbpath):
            return False
        try:
            import sqlite3
            with sqlite3.connect(dbpath) as db:
                results = db.execute("SELECT data FROM accounts")
                if len(results.fetchall()) > 0:
                    return True
            return False
        except:
            logging.exception("GwibberHelper.has_accounts_in_sqlite() failed")
            return False


class GwibberHelperMock(object):

    fake_gwibber_accounts_one = [
        {u'username': u'randomuser',
         u'user_id': u'2323434224',
         u'service': u'twitter',
         u'secret_token': u':some-token',
         u'color': u'#729FCF',
         u'receive_enabled': True,
         u'access_token': u'some_access_token',
         u'send_enabled': True,
         u'id': u'twitter-id-random-15af8bddb6',
         }]
    fake_gwibber_accounts_multiple = [
        {u'username': u'random1 with a very long name',
         u'user_id': u'2342342313',
         u'service': u'twitter',
         u'secret_token': u':some-token',
         u'color': u'#729FCF',
         u'receive_enabled': True,
         u'access_token': u'some_access_token',
         u'send_enabled': True,
         u'id': u'twitter-id-rnadomuser-radfsdf'},
        {u'username': u'mpt',
         u'user_id': u'23safdsaf5',
         u'service': u'twitter',
         u'secret_token': u':some_otken',
         u'color': u'#729FCF',
         u'receive_enabled': True,
         u'access_token': u'some_access_token',
         u'send_enabled': True,
         u'id': u'twitter-id-mpt-afsdfsa'}]

    def accounts(self):
        import copy
        num = os.environ["SOFTWARE_CENTER_GWIBBER_MOCK_USERS"]
        if int(num) == 0:
            return []
        elif int(num) == 1:
            return copy.copy(self.fake_gwibber_accounts_one)
        else:
            return copy.copy(self.fake_gwibber_accounts_multiple)

    def send_message(self, message, account_id="all"):
        sys.stderr.write("sending '%s' to '%s'\n" % (message, account_id))
        # used for testing purposes, to emulate a gwibber failure for ~1 out
        # of every 5 attempts
        r = random()
        if (r < 0.2 and
                not "SOFTWARE_CENTER_GWIBBER_MOCK_NO_FAIL" in os.environ):
            return False
        return True

    def has_accounts_in_sqlite():
        return True


GWIBBER_SERVICE_AVAILABLE = (GwibberHelper.has_accounts_in_sqlite() and
                             os.path.exists("/usr/bin/gwibber-poster"))