"""
    Slixmpp: The Slick XMPP Library
    Copyright (C) 2011  Nathanael C. Fritz
    This file is part of Slixmpp.

    See the file LICENSE for copying permission.
"""

import logging

from slixmpp.xmlstream import JID
from slixmpp.xmlstream.handler import Callback
from slixmpp.xmlstream.matcher import StanzaPath
from slixmpp.plugins.base import BasePlugin
from slixmpp.plugins.xep_0060 import stanza


log = logging.getLogger(__name__)


class XEP_0060(BasePlugin):

    """
    XEP-0060 Publish Subscribe
    """

    name = 'xep_0060'
    description = 'XEP-0060: Publish-Subscribe'
    dependencies = {'xep_0030', 'xep_0004', 'xep_0082', 'xep_0131'}
    stanza = stanza

    def plugin_init(self):
        self.node_event_map = {}

        self.xmpp.register_handler(
                Callback('Pubsub Event: Items',
                    StanzaPath('message/pubsub_event/items'),
                    self._handle_event_items))
        self.xmpp.register_handler(
                Callback('Pubsub Event: Purge',
                    StanzaPath('message/pubsub_event/purge'),
                    self._handle_event_purge))
        self.xmpp.register_handler(
                Callback('Pubsub Event: Delete',
                    StanzaPath('message/pubsub_event/delete'),
                    self._handle_event_delete))
        self.xmpp.register_handler(
                Callback('Pubsub Event: Configuration',
                    StanzaPath('message/pubsub_event/configuration'),
                    self._handle_event_configuration))
        self.xmpp.register_handler(
                Callback('Pubsub Event: Subscription',
                    StanzaPath('message/pubsub_event/subscription'),
                    self._handle_event_subscription))

        self.xmpp['xep_0131'].supported_headers.add('SubID')

    def plugin_end(self):
        self.xmpp.remove_handler('Pubsub Event: Items')
        self.xmpp.remove_handler('Pubsub Event: Purge')
        self.xmpp.remove_handler('Pubsub Event: Delete')
        self.xmpp.remove_handler('Pubsub Event: Configuration')
        self.xmpp.remove_handler('Pubsub Event: Subscription')

    def _handle_event_items(self, msg):
        """Raise events for publish and retraction notifications."""
        node = msg['pubsub_event']['items']['node']

        multi = len(msg['pubsub_event']['items']) > 1
        values = {}
        if multi:
            values = msg.values
            del values['pubsub_event']

        for item in msg['pubsub_event']['items']:
            event_name = self.node_event_map.get(node, None)
            event_type = 'publish'
            if item.name == 'retract':
                event_type = 'retract'

            if multi:
                condensed = self.xmpp.Message()
                condensed.values = values
                condensed['pubsub_event']['items']['node'] = node
                condensed['pubsub_event']['items'].append(item)
                self.xmpp.event('pubsub_%s' % event_type, msg)
                if event_name:
                    self.xmpp.event('%s_%s' % (event_name, event_type),
                                    condensed)
            else:
                self.xmpp.event('pubsub_%s' % event_type, msg)
                if event_name:
                    self.xmpp.event('%s_%s' % (event_name, event_type), msg)

    def _handle_event_purge(self, msg):
        """Raise events for node purge notifications."""
        node = msg['pubsub_event']['purge']['node']
        event_name = self.node_event_map.get(node, None)

        self.xmpp.event('pubsub_purge', msg)
        if event_name:
            self.xmpp.event('%s_purge' % event_name, msg)

    def _handle_event_delete(self, msg):
        """Raise events for node deletion notifications."""
        node = msg['pubsub_event']['delete']['node']
        event_name = self.node_event_map.get(node, None)

        self.xmpp.event('pubsub_delete', msg)
        if event_name:
            self.xmpp.event('%s_delete' % event_name, msg)

    def _handle_event_configuration(self, msg):
        """Raise events for node configuration notifications."""
        node = msg['pubsub_event']['configuration']['node']
        event_name = self.node_event_map.get(node, None)

        self.xmpp.event('pubsub_config', msg)
        if event_name:
            self.xmpp.event('%s_config' % event_name, msg)

    def _handle_event_subscription(self, msg):
        """Raise events for node subscription notifications."""
        node = msg['pubsub_event']['subscription']['node']
        event_name = self.node_event_map.get(node, None)

        self.xmpp.event('pubsub_subscription', msg)
        if event_name:
            self.xmpp.event('%s_subscription' % event_name, msg)

    def map_node_event(self, node, event_name):
        """
        Map node names to events.

        When a pubsub event is received for the given node,
        raise the provided event.

        For example::

            map_node_event('http://jabber.org/protocol/tune',
                           'user_tune')

        will produce the events 'user_tune_publish' and 'user_tune_retract'
        when the respective notifications are received from the node
        'http://jabber.org/protocol/tune', among other events.

        Arguments:
            node       -- The node name to map to an event.
            event_name -- The name of the event to raise when a
                          notification from the given node is received.
        """
        self.node_event_map[node] = event_name

    def create_node(self, jid, node, config=None, ntype=None, ifrom=None,
                    timeout_callback=None, callback=None, timeout=None):
        """
        Create and configure a new pubsub node.

        A server MAY use a different name for the node than the one provided,
        so be sure to check the result stanza for a server assigned name.

        If no configuration form is provided, the node will be created using
        the server's default configuration. To get the default configuration
        use get_node_config().

        Arguments:
            jid      -- The JID of the pubsub service.
            node     -- Optional name of the node to create. If no name is
                        provided, the server MAY generate a node ID for you.
                        The server can also assign a different name than the
                        one you provide; check the result stanza to see if
                        the server assigned a name.
            config   -- Optional XEP-0004 data form of configuration settings.
            ntype    -- The type of node to create. Servers typically default
                        to using 'leaf' if no type is provided.
            ifrom    -- Specify the sender's JID.
            timeout  -- The length of time (in seconds) to wait for a response
                        before exiting the send call if blocking is used.
                        Defaults to slixmpp.xmlstream.RESPONSE_TIMEOUT
            callback -- Optional reference to a stream handler function. Will
                        be executed when a reply stanza is received.
        """
        iq = self.xmpp.Iq(sto=jid, sfrom=ifrom, stype='set')
        iq['pubsub']['create']['node'] = node

        if config is not None:
            form_type = 'http://jabber.org/protocol/pubsub#node_config'
            if 'FORM_TYPE' in config.get_fields():
                config.field['FORM_TYPE']['value'] = form_type
            else:
                config.add_field(var='FORM_TYPE',
                                 ftype='hidden',
                                 value=form_type)
            if ntype:
                if 'pubsub#node_type' in config.get_fields():
                    config.field['pubsub#node_type']['value'] = ntype
                else:
                    config.add_field(var='pubsub#node_type', value=ntype)
            iq['pubsub']['configure'].append(config)

        return iq.send(callback=callback, timeout=timeout, timeout_callback=timeout_callback)

    def subscribe(self, jid, node, bare=True, subscribee=None, options=None,
                  ifrom=None, timeout_callback=None, callback=None,
                  timeout=None):
        """
        Subscribe to updates from a pubsub node.

        The rules for determining the JID that is subscribing to the node are:
            1. If subscribee is given, use that as provided.
            2. If ifrom was given, use the bare or full version based on bare.
            3. Otherwise, use self.xmpp.boundjid based on bare.

        Arguments:
            jid        -- The pubsub service JID.
            node       -- The node to subscribe to.
            bare       -- Indicates if the subscribee is a bare or full JID.
                          Defaults to True for a bare JID.
            subscribee -- The JID that is subscribing to the node.
            options    --
            ifrom      -- Specify the sender's JID.
            timeout    -- The length of time (in seconds) to wait for a
                          response before exiting the send call if blocking
                          is used.
                          Defaults to slixmpp.xmlstream.RESPONSE_TIMEOUT
            callback   -- Optional reference to a stream handler function. Will
                          be executed when a reply stanza is received.
        """
        iq = self.xmpp.Iq(sto=jid, sfrom=ifrom, stype='set')
        iq['pubsub']['subscribe']['node'] = node

        if subscribee is None:
            if ifrom:
                if bare:
                    subscribee = JID(ifrom).bare
                else:
                    subscribee = ifrom
            else:
                if bare:
                    subscribee = self.xmpp.boundjid.bare
                else:
                    subscribee = self.xmpp.boundjid

        iq['pubsub']['subscribe']['jid'] = subscribee
        if options is not None:
            iq['pubsub']['options'].append(options)
        return iq.send(callback=callback, timeout=timeout, timeout_callback=timeout_callback)

    def unsubscribe(self, jid, node, subid=None, bare=True, subscribee=None,
                    ifrom=None, timeout_callback=None, callback=None,
                    timeout=None):
        """
        Unubscribe from updates from a pubsub node.

        The rules for determining the JID that is unsubscribing
        from the node are:
            1. If subscribee is given, use that as provided.
            2. If ifrom was given, use the bare or full version based on bare.
            3. Otherwise, use self.xmpp.boundjid based on bare.

        Arguments:
            jid        -- The pubsub service JID.
            node       -- The node to unsubscribe from.
            subid      -- The specific subscription, if multiple subscriptions
                          exist for this JID/node combination.
            bare       -- Indicates if the subscribee is a bare or full JID.
                          Defaults to True for a bare JID.
            subscribee -- The JID that is unsubscribing from the node.
            ifrom      -- Specify the sender's JID.
            timeout    -- The length of time (in seconds) to wait for a
                          response before exiting the send call if blocking
                          is used.
                          Defaults to slixmpp.xmlstream.RESPONSE_TIMEOUT
            callback   -- Optional reference to a stream handler function. Will
                          be executed when a reply stanza is received.
        """
        iq = self.xmpp.Iq(sto=jid, sfrom=ifrom, stype='set')
        iq['pubsub']['unsubscribe']['node'] = node

        if subscribee is None:
            if ifrom:
                if bare:
                    subscribee = JID(ifrom).bare
                else:
                    subscribee = ifrom
            else:
                if bare:
                    subscribee = self.xmpp.boundjid.bare
                else:
                    subscribee = self.xmpp.boundjid

        iq['pubsub']['unsubscribe']['jid'] = subscribee
        iq['pubsub']['unsubscribe']['subid'] = subid
        return iq.send(callback=callback, timeout=timeout, timeout_callback=timeout_callback)

    def get_subscriptions(self, jid, node=None, ifrom=None,
                          timeout_callback=None, callback=None,
                          timeout=None):
        iq = self.xmpp.Iq(sto=jid, sfrom=ifrom, stype='get')
        iq['pubsub']['subscriptions']['node'] = node
        return iq.send(callback=callback, timeout=timeout, timeout_callback=timeout_callback)

    def get_affiliations(self, jid, node=None, ifrom=None,
                         timeout_callback=None, callback=None, timeout=None):
        iq = self.xmpp.Iq(sto=jid, sfrom=ifrom, stype='get')
        iq['pubsub']['affiliations']['node'] = node
        return iq.send(callback=callback, timeout=timeout, timeout_callback=timeout_callback)

    def get_subscription_options(self, jid, node=None, user_jid=None,
                                 ifrom=None, timeout_callback=None,
                                 callback=None, timeout=None):
        iq = self.xmpp.Iq(sto=jid, sfrom=ifrom, stype='get')
        if user_jid is None:
            iq['pubsub']['default']['node'] = node
        else:
            iq['pubsub']['options']['node'] = node
            iq['pubsub']['options']['jid'] = user_jid
        return iq.send(callback=callback, timeout=timeout, timeout_callback=timeout_callback)

    def set_subscription_options(self, jid, node, user_jid, options,
                                 ifrom=None, timeout_callback=None,
                                 callback=None, timeout=None):
        iq = self.xmpp.Iq(sto=jid, sfrom=ifrom, stype='get')
        iq['pubsub']['options']['node'] = node
        iq['pubsub']['options']['jid'] = user_jid
        iq['pubsub']['options'].append(options)
        return iq.send(callback=callback, timeout=timeout, timeout_callback=timeout_callback)

    def get_node_config(self, jid, node=None, ifrom=None,
                        timeout_callback=None, callback=None, timeout=None):
        """
        Retrieve the configuration for a node, or the pubsub service's
        default configuration for new nodes.

        Arguments:
            jid      -- The JID of the pubsub service.
            node     -- The node to retrieve the configuration for. If None,
                        the default configuration for new nodes will be
                        requested. Defaults to None.
            ifrom    -- Specify the sender's JID.
            timeout  -- The length of time (in seconds) to wait for a response
                        before exiting the send call if blocking is used.
                        Defaults to slixmpp.xmlstream.RESPONSE_TIMEOUT
            callback -- Optional reference to a stream handler function. Will
                        be executed when a reply stanza is received.
        """
        iq = self.xmpp.Iq(sto=jid, sfrom=ifrom, stype='get')
        if node is None:
            iq['pubsub_owner']['default']
        else:
            iq['pubsub_owner']['configure']['node'] = node
        return iq.send(callback=callback, timeout=timeout, timeout_callback=timeout_callback)

    def get_node_subscriptions(self, jid, node, ifrom=None,
                               timeout_callback=None, callback=None,
                               timeout=None):
        """
        Retrieve the subscriptions associated with a given node.

        Arguments:
            jid      -- The JID of the pubsub service.
            node     -- The node to retrieve subscriptions from.
            ifrom    -- Specify the sender's JID.
            timeout  -- The length of time (in seconds) to wait for a response
                        before exiting the send call if blocking is used.
                        Defaults to slixmpp.xmlstream.RESPONSE_TIMEOUT
            callback -- Optional reference to a stream handler function. Will
                        be executed when a reply stanza is received.
        """
        iq = self.xmpp.Iq(sto=jid, sfrom=ifrom, stype='get')
        iq['pubsub_owner']['subscriptions']['node'] = node
        return iq.send(callback=callback, timeout=timeout, timeout_callback=timeout_callback)

    def get_node_affiliations(self, jid, node, ifrom=None, timeout_callback=None,
                              callback=None, timeout=None):
        """
        Retrieve the affiliations associated with a given node.

        Arguments:
            jid      -- The JID of the pubsub service.
            node     -- The node to retrieve affiliations from.
            ifrom    -- Specify the sender's JID.
            timeout  -- The length of time (in seconds) to wait for a response
                        before exiting the send call if blocking is used.
                        Defaults to slixmpp.xmlstream.RESPONSE_TIMEOUT
            callback -- Optional reference to a stream handler function. Will
                        be executed when a reply stanza is received.
        """
        iq = self.xmpp.Iq(sto=jid, sfrom=ifrom, stype='get')
        iq['pubsub_owner']['affiliations']['node'] = node
        return iq.send(callback=callback, timeout=timeout, timeout_callback=timeout_callback)

    def delete_node(self, jid, node, ifrom=None, timeout_callback=None, callback=None,
                    timeout=None):
        """
        Delete a a pubsub node.

        Arguments:
            jid      -- The JID of the pubsub service.
            node     -- The node to delete.
            ifrom    -- Specify the sender's JID.
            timeout  -- The length of time (in seconds) to wait for a response
                        before exiting the send call if blocking is used.
                        Defaults to slixmpp.xmlstream.RESPONSE_TIMEOUT
            callback -- Optional reference to a stream handler function. Will
                        be executed when a reply stanza is received.
        """
        iq = self.xmpp.Iq(sto=jid, sfrom=ifrom, stype='set')
        iq['pubsub_owner']['delete']['node'] = node
        return iq.send(callback=callback, timeout=timeout, timeout_callback=timeout_callback)

    def set_node_config(self, jid, node, config, ifrom=None,
                        timeout_callback=None, callback=None, timeout=None):
        iq = self.xmpp.Iq(sto=jid, sfrom=ifrom, stype='set')
        iq['pubsub_owner']['configure']['node'] = node
        iq['pubsub_owner']['configure'].append(config)
        return iq.send(callback=callback, timeout=timeout, timeout_callback=timeout_callback)

    def publish(self, jid, node, id=None, payload=None, options=None,
                ifrom=None, timeout_callback=None, callback=None,
                timeout=None):
        """
        Add a new item to a node, or edit an existing item.

        For services that support it, you can use the publish command
        as an event signal by not including an ID or payload.

        When including a payload and you do not provide an ID then
        the service will generally create an ID for you.

        Publish options may be specified, and how those options
        are processed is left to the service, such as treating
        the options as preconditions that the node's settings
        must match.

        Arguments:
            jid      -- The JID of the pubsub service.
            node     -- The node to publish the item to.
            id       -- Optionally specify the ID of the item.
            payload  -- The item content to publish.
            options  -- A form of publish options.
            ifrom    -- Specify the sender's JID.
            timeout  -- The length of time (in seconds) to wait for a response
                        before exiting the send call if blocking is used.
                        Defaults to slixmpp.xmlstream.RESPONSE_TIMEOUT
            callback -- Optional reference to a stream handler function. Will
                        be executed when a reply stanza is received.
        """
        iq = self.xmpp.Iq(sto=jid, sfrom=ifrom, stype='set')
        iq['pubsub']['publish']['node'] = node
        if id is not None:
            iq['pubsub']['publish']['item']['id'] = id
        if payload is not None:
            iq['pubsub']['publish']['item']['payload'] = payload
        iq['pubsub']['publish_options'] = options
        return iq.send(callback=callback, timeout=timeout, timeout_callback=timeout_callback)

    def retract(self, jid, node, id, notify=None, ifrom=None,
                timeout_callback=None, callback=None, timeout=None):
        """
        Delete a single item from a node.
        """
        iq = self.xmpp.Iq(sto=jid, sfrom=ifrom, stype='set')

        iq['pubsub']['retract']['node'] = node
        iq['pubsub']['retract']['notify'] = notify
        iq['pubsub']['retract']['item']['id'] = id
        return iq.send(callback=callback, timeout=timeout, timeout_callback=timeout_callback)

    def purge(self, jid, node, ifrom=None, timeout_callback=None, callback=None,
              timeout=None):
        """
        Remove all items from a node.
        """
        iq = self.xmpp.Iq(sto=jid, sfrom=ifrom, stype='set')
        iq['pubsub_owner']['purge']['node'] = node
        return iq.send(callback=callback, timeout=timeout, timeout_callback=timeout_callback)

    def get_nodes(self, *args, **kwargs):
        """
        Discover the nodes provided by a Pubsub service, using disco.
        """
        return self.xmpp['xep_0030'].get_items(*args, **kwargs)

    def get_item(self, jid, node, item_id, ifrom=None,
                 timeout_callback=None, callback=None, timeout=None):
        """
        Retrieve the content of an individual item.
        """
        iq = self.xmpp.Iq(sto=jid, sfrom=ifrom, stype='get')
        item = stanza.Item()
        item['id'] = item_id
        iq['pubsub']['items']['node'] = node
        iq['pubsub']['items'].append(item)
        return iq.send(callback=callback, timeout=timeout, timeout_callback=timeout_callback)

    def get_items(self, jid, node, item_ids=None, max_items=None,
                  iterator=False, ifrom=None, timeout_callback=None,
                  callback=None, timeout=None):
        """
        Request the contents of a node's items.

        The desired items can be specified, or a query for the last
        few published items can be used.

        Pubsub services may use result set management for nodes with
        many items, so an iterator can be returned if needed.
        """
        iq = self.xmpp.Iq(sto=jid, sfrom=ifrom, stype='get')
        iq['pubsub']['items']['node'] = node
        iq['pubsub']['items']['max_items'] = max_items

        if item_ids is not None:
            for item_id in item_ids:
                item = stanza.Item()
                item['id'] = item_id
                iq['pubsub']['items'].append(item)

        if iterator:
            return self.xmpp['xep_0059'].iterate(iq, 'pubsub')
        else:
            return iq.send(callback=callback, timeout=timeout, timeout_callback=timeout_callback)

    def get_item_ids(self, jid, node, ifrom=None, timeout_callback=None, callback=None,
                     timeout=None, iterator=False):
        """
        Retrieve the ItemIDs hosted by a given node, using disco.
        """
        self.xmpp['xep_0030'].get_items(jid, node, ifrom=ifrom,
                                        callback=callback, timeout=timeout,
                                        iterator=iterator,
                                        timeout_callback=timeout_callback)

    def modify_affiliations(self, jid, node, affiliations=None, ifrom=None,
                            timeout_callback=None, callback=None,
                            timeout=None):
        iq = self.xmpp.Iq(sto=jid, sfrom=ifrom, stype='set')
        iq['pubsub_owner']['affiliations']['node'] = node

        if affiliations is None:
            affiliations = []

        for jid, affiliation in affiliations:
            aff = stanza.OwnerAffiliation()
            aff['jid'] = jid
            aff['affiliation'] = affiliation
            iq['pubsub_owner']['affiliations'].append(aff)

        return iq.send(callback=callback, timeout=timeout, timeout_callback=timeout_callback)

    def modify_subscriptions(self, jid, node, subscriptions=None,
                             ifrom=None, timeout_callback=None,
                             callback=None, timeout=None):
        iq = self.xmpp.Iq(sto=jid, sfrom=ifrom, stype='set')
        iq['pubsub_owner']['subscriptions']['node'] = node

        if subscriptions is None:
            subscriptions = []

        for jid, subscription in subscriptions:
            sub = stanza.OwnerSubscription()
            sub['jid'] = jid
            sub['subscription'] = subscription
            iq['pubsub_owner']['subscriptions'].append(sub)

        return iq.send(callback=callback, timeout=timeout, timeout_callback=timeout_callback)
