#!/usr/bin/python
# -*- coding: utf-8 -*-

"""
SAT plugin for managing xep-0077
Copyright (C) 2009  Jérôme Poisson (goffi@goffi.org)

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
(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, see <http://www.gnu.org/licenses/>.
"""

from logging import debug, info, error
from twisted.words.protocols.jabber import client, jid, xmlstream
from twisted.words.protocols.jabber import error as jab_error
from twisted.words.protocols.jabber.xmlstream import IQ
from twisted.internet import reactor
from tools.xml_tools import XMLTools
import pdb

from wokkel import data_form

NS_REG = 'jabber:iq:register'

PLUGIN_INFO = {
"name": "XEP 0077 Plugin",
"import_name": "XEP_0077",
"type": "XEP",
"dependencies": [],
"main": "XEP_0077",
"description": """Implementation of in-band registration"""
}

class XEP_0077():
 
    def __init__(self, host):
        info("Plugin XEP_0077 initialization")
        self.host = host
        self.triggers = {}  #used by other protocol (e.g. XEP-0100) to finish registration. key = target_jid
        host.bridge.addMethod("in_band_register", ".communication", in_sign='s', out_sign='s', method=self.in_band_register)
        host.bridge.addMethod("in_band_submit", ".request", in_sign='sa(ss)', out_sign='s', method=self.in_band_submit)
   
    def addTrigger(self, target, cb):
        """Add a callback which is called when registration to target is successful"""
        self.triggers[target] = cb
    
    def reg_ok(self, answer):
        """Called after the first get IQ"""
        try:
            x_elem = filter (lambda x:x.name == "x", answer.firstChildElement().elements())[0] #We only want the "x" element (data form)
        except IndexError:
            info("No data form found")
            #TODO: manage registration without data form
            answer_data = {}
            answer_data={"reason": "unmanaged", "message":"This gateway can't be managed by SàT, sorry :("}
            answer_type = "ERROR"
            self.host.bridge.actionResult(answer_type, answer['id'], answer_data)
            return
        
        form = data_form.Form.fromElement(x_elem)
        xml_data = XMLTools.dataForm2xml(form)
        self.host.bridge.actionResult("FORM", answer['id'], {"target":answer["from"], "type":"registration", "xml":xml_data})

    def reg_err(self, failure):
        """Called when something is wrong with registration"""
        info ("Registration failure: %s" % str(failure.value))
        answer_data = {}
        answer_data['reason'] = 'unknown'
        answer_data={"message":"%s [code: %s]" % (failure.value.condition, failure.value.code)}
        answer_type = "ERROR"
        self.host.bridge.actionResult(answer_type, failure.value.stanza['id'], answer_data)
   
    def unregistrationAnswer(self, answer):
        debug ("registration answer: %s" % answer.toXml())
        answer_type = "SUCCESS"
        answer_data={"message":"Your are now unregistred"}
        self.host.bridge.actionResult(answer_type, answer['id'], answer_data)
        
    def unregistrationFailure(self, failure):
        info ("Unregistration failure: %s" % str(failure.value))
        answer_type = "ERROR"
        answer_data = {}
        answer_data['reason'] = 'unknown'
        answer_data={"message":"Unregistration failed: %s" % failure.value.condition}
        self.host.bridge.actionResult(answer_type, failure.value.stanza['id'], answer_data)
    
    def registrationAnswer(self, answer):
        debug ("registration answer: %s" % answer.toXml())
        answer_type = "SUCCESS"
        answer_data={"message":"Registration successfull"}
        self.host.bridge.actionResult(answer_type, answer['id'], answer_data)
        if self.triggers.has_key(answer["from"]):
            self.triggers[answer["from"]](answer["from"])
            del self.triggers[answer["from"]]
        
    def registrationFailure(self, failure):
        info ("Registration failure: %s" % str(failure.value))
        print failure.value.stanza.toXml()
        answer_type = "ERROR"
        answer_data = {}
        if failure.value.condition == 'conflict':
            answer_data['reason'] = 'conflict'
            answer_data={"message":"Username already exists, please choose an other one"}
        else:
            answer_data['reason'] = 'unknown'
            answer_data={"message":"Registration failed"}
        self.host.bridge.actionResult(answer_type, failure.value.stanza['id'], answer_data)
        if self.triggers.has_key(answer["from"]):
            del self.triggers[answer["from"]]

    def in_band_submit(self, action, target, fields):
        """Submit a form for registration, using data_form"""
        id, deferred = self.host.submitForm(action, target, fields)
        if action == 'CANCEL':
            deferred.addCallbacks(self.unregistrationAnswer, self.unregistrationFailure)
        else:    
            deferred.addCallbacks(self.registrationAnswer, self.registrationFailure)
        return id
    
    def in_band_register(self, target):
        """register to a target JID"""
        to_jid = jid.JID(target)
        debug("Asking registration for [%s]" % to_jid.full())
        reg_request=IQ(self.host.xmlstream,'get')
        reg_request["from"]=self.host.me.full()
        reg_request["to"] = to_jid.full()
        query=reg_request.addElement('query', NS_REG)
        reg_request.send(to_jid.full()).addCallbacks(self.reg_ok, self.reg_err)
        return reg_request["id"]