# -*- coding: utf-8 -*-

#Copyright (C) 2009  Georg Bischoff

#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 3 of the License, or 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, see <http://www.gnu.org/licenses/>.

from anbieter import anbieter

from sipgate import  NoValidStatusCode

from telnumber import telnumber, NotATelNumber

import ConfigParser

import xmlrpclib

import base64

import urllib, httplib

class smstrade(anbieter):

    """

    s. auch http://kundencenter.smstrade.de/sites/smstrade.de.kundencenter/__pdf/SMS-Gateway_HTTP_API_v2.pdf

    """

    section="smstrade"

    url="https://gateway.smstrade.de"

    def __init__(self):       

        self.domain = "smstrade.de" # website of the sms service

        self.gateway = "gateway.smstrade.de" # gateway where the request will be sent

        self.gatewayPort = 80 # port of the gateway

        self.script = "/"  # full path to the script that will handle the request

        self.method = "POST" # method that will be used. Currently only POST is supported

        self.maxMessageLength = None # maximum length of message; None if should not be set

        self.smsCanBeSendDelayed = True # True if sms can be sent delayed by the sms service. Otherwise False

        self.senderRe = r"^.{0,11}|[0-9]{0,15}" # RegEx for the sender-input-field

        self.routes = ("basicplus", "economy", "gold", "direct") # possible routes that can be used

        self.routesWithSourceIdentifier = ("gold", "direct") # routes where a sender can be defined

        # statusCodes that the sms service returns on requests

        self.statusCodes = {10 : "Empfaengernummer nicht korrekt",

            20 : "Absenderkennung nicht korrekt",

            30 : "Nachrichtentext nicht korrekt",

            31 : "Messagetyp nicht korrekt",

            40 : "SMS Route nicht korrekt",

            50 : "Identifikation fehlgeschlagen",

            60 : "nicht genuegend Guthaben",

            70 : "Netz wird von Route nicht abgedeckt",

            71 : "Feature nicht ueber diese Route moeglich",

            80 : "Uebergabe an SMS-C fehlgeschlagen",

            90 : "Versand nicht moeglich",

            100 : "SMS wurde versendet",

            999 : "SMS wird zeitversetzt verschickt"}

        self.parameters = {} # don't write anything into this dict! Don't delete it!                   

    def read_basic_config(self,filename):

        """Read basic options from the config file"""

        cp = ConfigParser.ConfigParser()

        cp.read([filename])

        self.key=cp.get(self.section, 'key')

        self.route=cp.get(self.section, 'route')

        self.from_=cp.get(self.section, 'from')

        self.debug=cp.get(self.section, 'debug')

    def sendSMS(self,sms,recipients):

        """send SMS with $sms to $recipients"""

        sended = []

        key = self.key

        route = unicode(self.route)

        message = unicode(sms.content)

        from_ = unicode(self.from_)

        timestamp = None

        for recipient in recipients:

            try:

                tel = telnumber(recipient)                

                if tel in sended:                                                                           #only send message once per recipient

                    continue

                sended.append(tel)	

                to = unicode((tel.number)).strip()						                

                code, smsSendStatus = self.__send(key, route, to, message, from_, timestamp)	

                if code in(100, 999):

                    self.updateStatus(arranged=recipient)

            except (NotATelNumber,NoValidStatusCode,InternetConnectionError):

                self.updateStatus(failed=recipient)

    def __send(self, key, route, to, message, from_=None, timestamp=None):

        """ This function is the main part of the request to the sms service.    

        The function has to return a unicode formated string that will represent the answer of the sms service

        to the request."""

        self.parameters["key"] = key        

        self.parameters["route"] = route

        self.parameters["to"] = to

        self.parameters["message"] = message

        self.parameters["debug"] = self.debug				

        if from_ is not None:

            self.parameters["from"] = from_

        else:

            if "from" in self.parameters.keys():

                del(self.parameters["from"])

        if timestamp is not None:

            self.parameters["senddate"] = unicode(timestamp)

        else:

            if "senddate" in self.parameters.keys():

                del(self.parameters["senddate"])

        self.parameters["concat_sms"] = "1" if len(message) > 160 else "0"

        params = urllib.urlencode(dict([k, v.encode('iso-8859-1')] for k, v in self.parameters.items()))

        headers = {"Content-type": "application/x-www-form-urlencoded",

            "Accept": "text/plain"}

        conn = httplib.HTTPConnection("%s:%i" % (self.gateway, self.gatewayPort))

        try:

            conn.request(self.method, self.script, params, headers)

            response = conn.getresponse()

            data = response.read()

        except socket.gaierror:

            raise InternetConnectionError("%s:%i" % (self.gateway, self.gatewayPort))

        else:

            conn.close()

        try:

            return int(data), self.statusCodes[int(data)]

        except ValueError:

            # this happens if the sms will be send delayed

            return 999, self.statusCodes[999]

    def updateStatus(self, arranged=None, failed=None):

        """is a function that is called, if a new SMS/FAX was send

        -arranged is non None, if SMS/FAX was sended successfully

        -failed is non None, if SMS/FAX sending failed

        the content will be the recipent"""

        pass

class InternetConnectionError(Exception):

	def __init__(self, url):

		self.url = url

	def __str__(self):

		return "InternetConnectionError: It is not possible to open 'http://%s'. Please check your connection to the Internet!" % self.url