# -*- 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 telnumber import telnumber, NotATelNumber
import ConfigParser
import xmlrpclib
import base64

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.toPlainText())
	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()						                
			smsSendStatus = self.__sendSms( 
						key, route, to, message, from_, timestamp)									            
		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 self.statusCodes[int(data)]
	except ValueError:
		# this happens if the sms will be send delayed
		return 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