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"""
	SleekXMPP: The Sleek XMPP Library
	Copyright (C) 2010  Nathanael C. Fritz
	This file is part of SleekXMPP.

	See the file license.txt for copying permission.
"""
from __future__ import with_statement, unicode_literals


from xml.etree import cElementTree as ET
from . xmlstream.xmlstream import XMLStream
from . xmlstream.matcher.xmlmask import MatchXMLMask
from . xmlstream.matcher.many import MatchMany
from . xmlstream.handler.xmlcallback import XMLCallback
from . xmlstream.handler.xmlwaiter import XMLWaiter
from . xmlstream.handler.waiter import Waiter
from . xmlstream.handler.callback import Callback
from . import plugins
from . stanza.message import Message
from . stanza.iq import Iq
from . stanza.presence import Presence
from . stanza.roster import Roster
from . stanza.nick import Nick
from . stanza.htmlim import HTMLIM
from . stanza.error import Error

import logging
import threading

import sys

if sys.version_info < (3,0):
	reload(sys)
	sys.setdefaultencoding('utf8')


def stanzaPlugin(stanza, plugin):
	stanza.plugin_attrib_map[plugin.plugin_attrib] = plugin
	stanza.plugin_tag_map["{%s}%s" % (plugin.namespace, plugin.name)] = plugin


class basexmpp(object):
	def __init__(self):
		self.id = 0
		self.id_lock = threading.Lock()
		self.sentpresence = False
		self.fulljid = ''
		self.resource = ''
		self.jid = ''
		self.username = ''
		self.domain = ''
		self.plugin = {}
		self.auto_authorize = True
		self.auto_subscribe = True
		self.event_handlers = {}
		self.roster = {}
		self.registerHandler(Callback('IM', MatchXMLMask("<message xmlns='%s'><body /></message>" % self.default_ns), self._handleMessage))
		self.registerHandler(Callback('Presence', MatchXMLMask("<presence xmlns='%s' />" % self.default_ns), self._handlePresence))
		self.add_event_handler('presence_subscribe', self._handlePresenceSubscribe)
		self.registerStanza(Message)
		self.registerStanza(Iq)
		self.registerStanza(Presence)
		self.stanzaPlugin(Iq, Roster)
		self.stanzaPlugin(Message, Nick)
		self.stanzaPlugin(Message, HTMLIM)

	def stanzaPlugin(self, stanza, plugin):
		stanza.plugin_attrib_map[plugin.plugin_attrib] = plugin
		stanza.plugin_tag_map["{%s}%s" % (plugin.namespace, plugin.name)] = plugin
	
	def Message(self, *args, **kwargs):
		return Message(self, *args, **kwargs)

	def Iq(self, *args, **kwargs):
		return Iq(self, *args, **kwargs)

	def Presence(self, *args, **kwargs):
		return Presence(self, *args, **kwargs)
	
	def set_jid(self, jid):
		"""Rip a JID apart and claim it as our own."""
		self.fulljid = jid
		self.resource = self.getjidresource(jid)
		self.jid = self.getjidbare(jid)
		self.username = jid.split('@', 1)[0]
		self.domain = jid.split('@',1)[-1].split('/', 1)[0]
	
	def process(self, *args, **kwargs):
		for idx in self.plugin:
			if not self.plugin[idx].post_inited: self.plugin[idx].post_init()
		return super(basexmpp, self).process(*args, **kwargs)
		
	def registerPlugin(self, plugin, pconfig = {}, pluginModule = None):
		"""Register a plugin not in plugins.__init__.__all__ but in the plugins
		directory."""
		# discover relative "path" to the plugins module from the main app, and import it.
		# TODO:
		# gross, this probably isn't necessary anymore, especially for an installed module
		try: 
			if pluginModule:
				module = __import__(pluginModule, globals(), locals(), [plugin])
			else:
				module = __import__("%s.%s" % (globals()['plugins'].__name__, plugin), globals(), locals(), [plugin])
			# init the plugin class
			self.plugin[plugin] = getattr(module, plugin)(self, pconfig) # eek
			# all of this for a nice debug? sure.
			xep = ''
			if hasattr(self.plugin[plugin], 'xep'):
				xep = "(XEP-%s) " % self.plugin[plugin].xep
			logging.debug("Loaded Plugin %s%s" % (xep, self.plugin[plugin].description))
		except:
			logging.exception("Unable to load plugin: %s", plugin )


	def register_plugins(self):
		"""Initiates all plugins in the plugins/__init__.__all__"""
		if self.plugin_whitelist:
			plugin_list = self.plugin_whitelist
		else:
			plugin_list = plugins.__all__
		for plugin in plugin_list:
			if plugin in plugins.__all__:
				self.registerPlugin(plugin, self.plugin_config.get(plugin, {}), False)
			else:
				raise NameError("No plugin by the name of %s listed in plugins.__all__." % plugin)
		# run post_init() for cross-plugin interaction
		for plugin in self.plugin:
			self.plugin[plugin].post_init()
	
	def getNewId(self):
		with self.id_lock:
			self.id += 1
			return self.getId()
	
	def add_handler(self, mask, pointer, disposable=False, threaded=False, filter=False, instream=False):
		#logging.warning("Deprecated add_handler used for %s: %s." % (mask, pointer))
		self.registerHandler(XMLCallback('add_handler_%s' % self.getNewId(), MatchXMLMask(mask), pointer, threaded, disposable, instream))
	
	def getId(self):
		return "%X" % self.id

	def sendXML(self, data, mask=None, timeout=10):
		return self.send(self.tostring(data), mask, timeout)
	
	def send(self, data, mask=None, timeout=10):
		#logging.warning("Deprecated send used for \"%s\"" % (data,))
		#if not type(data) == type(''):
		#	data = self.tostring(data)
		if hasattr(mask, 'xml'):
			mask = mask.xml
		data = str(data)
		if mask is not None:
			logging.warning("Use of send mask waiters is deprecated")
			waitfor = Waiter('SendWait_%s' % self.getNewId(), MatchXMLMask(mask))
			self.registerHandler(waitfor)
		self.sendRaw(data)
		if mask is not None:
			return waitfor.wait(timeout)
	
	def makeIqGet(self, queryxmlns = None):
		# TODO this should take a 'to' param since more often than not you set 
		# iq['to']=whatever immediately after.
		iq = self.Iq().setValues({'type': 'get'})
		if queryxmlns:
			iq.append(ET.Element("{%s}query" % queryxmlns))
		return iq
	
	def makeIqResult(self, id):
		# TODO this should take a 'to' param since more often than not you set 
		# iq['to']=whatever immediately after.
		return self.Iq().setValues({'id': id, 'type': 'result'})
	
	def makeIqSet(self, sub=None):
		# TODO this should take a 'to' param since more often than not you set 
		# iq['to']=whatever immediately after.
		iq = self.Iq().setValues({'type': 'set'})
		if sub != None:
			iq.append(sub)
		return iq

	def makeIqError(self, id, type='cancel', condition='feature-not-implemented', text=None):
		# TODO not used.
		iq = self.Iq().setValues({'id': id})
		iq['error'].setValues({'type': type, 'condition': condition, 'text': text})
		return iq

	def add_event_handler(self, name, pointer, threaded=False, disposable=False):
		if not name in self.event_handlers:
			self.event_handlers[name] = []
		self.event_handlers[name].append((pointer, threaded, disposable))

	def del_event_handler(self, name, pointer):
		"""Remove a handler for an event."""
		if not name in self.event_handlers:
			return
		
		# Need to keep handlers that do not use
		# the given function pointer
		def filter_pointers(handler):
			return handler[0] != pointer

		self.event_handlers[name] = filter(filter_pointers, 
						   self.event_handlers[name])

	def event(self, name, eventdata = {}): # called on an event
		for handler in self.event_handlers.get(name, []):
			if handler[1]: #if threaded
				#thread.start_new(handler[0], (eventdata,))
				x = threading.Thread(name="Event_%s" % str(handler[0]), target=handler[0], args=(eventdata,))
				x.start()
			else:
				handler[0](eventdata)
			if handler[2]: #disposable
				with self.lock:
					self.event_handlers[name].pop(self.event_handlers[name].index(handler))
	
	def makeMessage(self, mto, mbody=None, msubject=None, mtype=None, mhtml=None, mfrom=None, mnick=None):
		message = self.Message(sto=mto, stype=mtype, sfrom=mfrom)
		message['body'] = mbody
		message['subject'] = msubject
		if mnick is not None: message['nick'] = mnick
		if mhtml is not None: message['html']['html'] = mhtml
		return message
	
	def makePresence(self, pshow=None, pstatus=None, ppriority=None, pto=None, ptype=None, pfrom=None):
		presence = self.Presence(stype=ptype, sfrom=pfrom, sto=pto)
		if pshow is not None: presence['type'] = pshow
		if pfrom is None: #maybe this should be done in stanzabase
			presence['from'] = self.fulljid
		presence['priority'] = ppriority
		presence['status'] = pstatus
		return presence
	
	def sendMessage(self, mto, mbody, msubject=None, mtype=None, mhtml=None, mfrom=None, mnick=None):
		self.send(self.makeMessage(mto,mbody,msubject,mtype,mhtml,mfrom,mnick))
	
	def sendPresence(self, pshow=None, pstatus=None, ppriority=None, pto=None, pfrom=None, ptype=None):
		self.send(self.makePresence(pshow,pstatus,ppriority,pto, ptype=ptype, pfrom=pfrom))
		if not self.sentpresence:
			self.event('sent_presence')
			self.sentpresence = True

	def sendPresenceSubscription(self, pto, pfrom=None, ptype='subscribe', pnick=None) :
		presence = self.makePresence(ptype=ptype, pfrom=pfrom, pto=self.getjidbare(pto))
		if pnick :
			nick = ET.Element('{http://jabber.org/protocol/nick}nick')
			nick.text = pnick
			presence.append(nick)
		self.send(presence)
	
	def getjidresource(self, fulljid):
		if '/' in fulljid:
			return fulljid.split('/', 1)[-1]
		else:
			return ''
	
	def getjidbare(self, fulljid):
		return fulljid.split('/', 1)[0]

	def _handleMessage(self, msg):
		self.event('message', msg)
	
	def _handlePresence(self, presence):
		"""Update roster items based on presence"""
		self.event("presence_%s" % presence['type'], presence)
		if presence['type'] in ('subscribe', 'subscribed', 'unsubscribe', 'unsubscribed'):
			self.event('changed_subscription', presence)
			return
		elif not presence['type'] in ('available', 'unavailable') and not presence['type'] in presence.showtypes:
			return
		jid = presence['from'].bare
		resource = presence['from'].resource
		show = presence['type']
		status = presence['status']
		priority = presence['priority']
		wasoffline = False
		oldroster = self.roster.get(jid, {}).get(resource, {})
		if not presence['from'].bare in self.roster:
			self.roster[jid] = {'groups': [], 'name': '', 'subscription': 'none', 'presence': {}, 'in_roster': False}
		if not resource in self.roster[jid]['presence']:
			if (show == 'available' or show in presence.showtypes):
				self.event("got_online", presence)
			wasoffline = True
			self.roster[jid]['presence'][resource] = {}
		if self.roster[jid]['presence'][resource].get('show', 'unavailable') == 'unavailable':
			wasoffline = True
		self.roster[jid]['presence'][resource] = {'show': show, 'status': status, 'priority': priority}
		name = self.roster[jid].get('name', '')
		if show == 'unavailable':
			logging.debug("%s %s got offline" % (jid, resource))
			del self.roster[jid]['presence'][resource]
			if len(self.roster[jid]['presence']) == 0 and not self.roster[jid]['in_roster']:
				del self.roster[jid]
			if not wasoffline:
				self.event("got_offline", presence)
			else:
				return False
		self.event("changed_status", presence)
		name = ''
		if name:
			name = "(%s) " % name
		logging.debug("STATUS: %s%s/%s[%s]: %s" % (name, jid, resource, show,status))
	
	def _handlePresenceSubscribe(self, presence):
		"""Handling subscriptions automatically."""
		if self.auto_authorize == True:
			self.send(self.makePresence(ptype='subscribed', pto=presence['from'].bare))
			if self.auto_subscribe:
				self.send(self.makePresence(ptype='subscribe', pto=presence['from'].bare))
		elif self.auto_authorize == False:
			self.send(self.makePresence(ptype='unsubscribed', pto=presence['from'].bare))