# Slixmpp: The Slick XMPP Library
# Copyright (C) 2010 Nathanael C. Fritz, Lance J.T. Stout
# This file is part of Slixmpp.
# See the file LICENSE for copying permission.
import logging
from slixmpp.plugins import BasePlugin
from .. xmlstream.handler.callback import Callback
from .. xmlstream.matcher.xpath import MatchXPath
from .. xmlstream.stanzabase import register_stanza_plugin, ElementBase, ET, JID
from .. stanza.iq import Iq


log = logging.getLogger(__name__)


class GmailQuery(ElementBase):
    namespace = 'google:mail:notify'
    name = 'query'
    plugin_attrib = 'gmail'
    interfaces = {'newer-than-time', 'newer-than-tid', 'q', 'search'}

    def get_search(self):
        return self['q']

    def set_search(self, search):
        self['q'] = search

    def del_search(self):
        del self['q']


class MailBox(ElementBase):
    namespace = 'google:mail:notify'
    name = 'mailbox'
    plugin_attrib = 'mailbox'
    interfaces = {'result-time', 'total-matched', 'total-estimate',
                  'url', 'threads', 'matched', 'estimate'}

    def get_threads(self):
        threads = []
        for threadXML in self.xml.findall('{%s}%s' % (MailThread.namespace,
                                                      MailThread.name)):
            threads.append(MailThread(xml=threadXML, parent=None))
        return threads

    def get_matched(self):
        return self['total-matched']

    def get_estimate(self):
        return self['total-estimate'] == '1'


class MailThread(ElementBase):
    namespace = 'google:mail:notify'
    name = 'mail-thread-info'
    plugin_attrib = 'thread'
    interfaces = {'tid', 'participation', 'messages', 'date',
                  'senders', 'url', 'labels', 'subject', 'snippet'}
    sub_interfaces = {'labels', 'subject', 'snippet'}

    def get_senders(self):
        senders = []
        sendersXML = self.xml.find('{%s}senders' % self.namespace)
        if sendersXML is not None:
            for senderXML in sendersXML.findall('{%s}sender' % self.namespace):
                senders.append(MailSender(xml=senderXML, parent=None))
        return senders


class MailSender(ElementBase):
    namespace = 'google:mail:notify'
    name = 'sender'
    plugin_attrib = 'sender'
    interfaces = {'address', 'name', 'originator', 'unread'}

    def get_originator(self):
        return self.xml.attrib.get('originator', '0') == '1'

    def get_unread(self):
        return self.xml.attrib.get('unread', '0') == '1'


class NewMail(ElementBase):
    namespace = 'google:mail:notify'
    name = 'new-mail'
    plugin_attrib = 'new-mail'


class gmail_notify(BasePlugin):
    """
    Google Talk: Gmail Notifications
    """

    def plugin_init(self):
        self.description = 'Google Talk: Gmail Notifications'

        self.xmpp.registerHandler(
            Callback('Gmail Result',
                     MatchXPath('{%s}iq/{%s}%s' % (self.xmpp.default_ns,
                                                   MailBox.namespace,
                                                   MailBox.name)),
                     self.handle_gmail))

        self.xmpp.registerHandler(
            Callback('Gmail New Mail',
                     MatchXPath('{%s}iq/{%s}%s' % (self.xmpp.default_ns,
                                                   NewMail.namespace,
                                                   NewMail.name)),
                     self.handle_new_mail))

        register_stanza_plugin(Iq, GmailQuery)
        register_stanza_plugin(Iq, MailBox)
        register_stanza_plugin(Iq, NewMail)

        self.last_result_time = None

    def handle_gmail(self, iq):
        mailbox = iq['mailbox']
        approx = ' approximately' if mailbox['estimated'] else ''
        log.info('Gmail: Received%s %s emails', approx, mailbox['total-matched'])
        self.last_result_time = mailbox['result-time']
        self.xmpp.event('gmail_messages', iq)

    def handle_new_mail(self, iq):
        log.info("Gmail: New emails received!")
        self.xmpp.event('gmail_notify')
        self.checkEmail()

    def getEmail(self, query=None):
        return self.search(query)

    def checkEmail(self):
        return self.search(newer=self.last_result_time)

    def search(self, query=None, newer=None):
        if query is None:
            log.info("Gmail: Checking for new emails")
        else:
            log.info('Gmail: Searching for emails matching: "%s"', query)
        iq = self.xmpp.Iq()
        iq['type'] = 'get'
        iq['to'] = self.xmpp.boundjid.bare
        iq['gmail']['q'] = query
        iq['gmail']['newer-than-time'] = newer
        return iq.send()