#!/usr/bin/env python2
# -*- coding: utf-8 -*-

# jp: a SàT command line tool
# Copyright (C) 2009-2016 Jérôme Poisson (goffi@goffi.org)

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero 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 Affero General Public License for more details.

# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.


import base
from sat.core.i18n import _
from sat.core import exceptions
from sat_frontends.jp.constants import Const as C
from sat_frontends.jp import common
from sat_frontends.jp import arg_tools
from functools import partial
from sat.tools.common import uri
from sat.tools.common.ansi import ANSI as A
from sat_frontends.tools import jid, strings
import argparse
import os.path
import re
import subprocess
import sys

__commands__ = ["Pubsub"]

PUBSUB_TMP_DIR = u"pubsub"
PUBSUB_SCHEMA_TMP_DIR = PUBSUB_TMP_DIR + "_schema"
ALLOWED_SUBSCRIPTIONS_OWNER = ('subscribed', 'pending', 'none')

# TODO: need to split this class in several modules, plugin should handle subcommands


class NodeInfo(base.CommandBase):

    def __init__(self, host):
        base.CommandBase.__init__(self, host, 'info', use_output=C.OUTPUT_DICT, use_pubsub_node_req=True, help=_(u'retrieve node configuration'))
        self.need_loop=True

    def add_parser_options(self):
        self.parser.add_argument("-k", "--key", type=base.unicode_decoder, action='append', dest='keys',
                                 help=_(u"data key to filter"))

    def removePrefix(self, key):
        return key[7:] if key.startswith(u"pubsub#") else key

    def filterKey(self, key):
        return any((key == k or key == u'pubsub#' + k) for k in self.args.keys)

    def psNodeConfigurationGetCb(self, config_dict):
        key_filter = (lambda k: True) if not self.args.keys else self.filterKey
        config_dict = {self.removePrefix(k):v for k,v in config_dict.iteritems() if key_filter(k)}
        self.output(config_dict)
        self.host.quit()

    def psNodeConfigurationGetEb(self, failure_):
        self.disp(u"can't get node configuration: {reason}".format(
            reason=failure_), error=True)
        self.host.quit(C.EXIT_BRIDGE_ERRBACK)

    def start(self):
        common.checkURI(self.args)
        self.host.bridge.psNodeConfigurationGet(
            self.args.service,
            self.args.node,
            self.profile,
            callback=self.psNodeConfigurationGetCb,
            errback=self.psNodeConfigurationGetEb)


class NodeCreate(base.CommandBase):

    def __init__(self, host):
        base.CommandBase.__init__(self, host, 'create', use_output=C.OUTPUT_DICT, use_pubsub_node_req=True, use_verbose=True, help=_(u'create a node'))
        self.need_loop=True

    def add_parser_options(self):
        self.parser.add_argument("-f", "--field", type=base.unicode_decoder, action='append', nargs=2, dest='fields',
                                 default={}, metavar=(u"KEY", u"VALUE"), help=_(u"configuration field to set"))
        self.parser.add_argument("-F", "--full-prefix", action="store_true", help=_(u"don't prepend \"pubsub#\" prefix to field names"))

    def psNodeCreateCb(self, node_id):
        if self.host.verbosity:
            announce = _(u'node created successfully: ')
        else:
            announce = u''
        self.disp(announce + node_id)
        self.host.quit()

    def psNodeCreateEb(self, failure_):
        self.disp(u"can't create: {reason}".format(
            reason=failure_), error=True)
        self.host.quit(C.EXIT_BRIDGE_ERRBACK)

    def start(self):
        if not self.args.full_prefix:
            options = {u'pubsub#' + k: v for k,v in self.args.fields}
        else:
            options = dict(self.args.fields)
        self.host.bridge.psNodeCreate(
            self.args.service,
            self.args.node,
            options,
            self.profile,
            callback=self.psNodeCreateCb,
            errback=partial(self.errback,
                            msg=_(u"can't create node: {}"),
                            exit_code=C.EXIT_BRIDGE_ERRBACK))


class NodeDelete(base.CommandBase):

    def __init__(self, host):
        base.CommandBase.__init__(self, host, 'delete', use_pubsub_node_req=True, help=_(u'delete a node'))
        self.need_loop=True

    def add_parser_options(self):
        self.parser.add_argument('-f', '--force', action='store_true', help=_(u'delete node without confirmation'))

    def psNodeDeleteCb(self):
        self.disp(_(u'node deleted successfully'))
        self.host.quit()

    def start(self):
        if not self.args.force:
            if not self.args.service:
                message = _(u"Are you sure to delete pep node [{node_id}] ?").format(
                    node_id=self.args.node)
            else:
                message = _(u"Are you sure to delete node [{node_id}] on service [{service}] ?").format(
                    node_id=self.args.node, service=self.args.service)

            res = raw_input("{} (y/N)? ".format(message))
            if res not in ("y", "Y"):
                self.disp(_(u"node deletion cancelled"))
                self.host.quit(2)

        self.host.bridge.psNodeDelete(
            self.args.service,
            self.args.node,
            self.profile,
            callback=self.psNodeDeleteCb,
            errback=partial(self.errback,
                            msg=_(u"can't delete node: {}"),
                            exit_code=C.EXIT_BRIDGE_ERRBACK))


class NodeSet(base.CommandBase):

    def __init__(self, host):
        base.CommandBase.__init__(self, host, 'set', use_output=C.OUTPUT_DICT, use_pubsub_node_req=True, use_verbose=True, help=_(u'set node configuration'))
        self.need_loop=True

    def add_parser_options(self):
        self.parser.add_argument("-f", "--field", type=base.unicode_decoder, action='append', nargs=2, dest='fields',
                                 required=True, metavar=(u"KEY", u"VALUE"), help=_(u"configuration field to set (required)"))

    def psNodeConfigurationSetCb(self):
        self.disp(_(u'node configuration successful'), 1)
        self.host.quit()

    def psNodeConfigurationSetEb(self, failure_):
        self.disp(u"can't set node configuration: {reason}".format(
            reason=failure_), error=True)
        self.host.quit(C.EXIT_BRIDGE_ERRBACK)

    def getKeyName(self, k):
        if not k.startswith(u'pubsub#'):
            return u'pubsub#' + k
        else:
            return k

    def start(self):
        common.checkURI(self.args)
        self.host.bridge.psNodeConfigurationSet(
            self.args.service,
            self.args.node,
            {self.getKeyName(k): v for k,v in self.args.fields},
            self.profile,
            callback=self.psNodeConfigurationSetCb,
            errback=self.psNodeConfigurationSetEb)


class NodeAffiliationsGet(base.CommandBase):

    def __init__(self, host):
        base.CommandBase.__init__(self, host, 'get', use_output=C.OUTPUT_DICT, use_pubsub_node_req=True, help=_(u'retrieve node affiliations (for node owner)'))
        self.need_loop=True

    def add_parser_options(self):
        pass

    def psNodeAffiliationsGetCb(self, affiliations):
        self.output(affiliations)
        self.host.quit()

    def psNodeAffiliationsGetEb(self, failure_):
        self.disp(u"can't get node affiliations: {reason}".format(
            reason=failure_), error=True)
        self.host.quit(C.EXIT_BRIDGE_ERRBACK)

    def start(self):
        common.checkURI(self.args)
        self.host.bridge.psNodeAffiliationsGet(
            self.args.service,
            self.args.node,
            self.profile,
            callback=self.psNodeAffiliationsGetCb,
            errback=self.psNodeAffiliationsGetEb)


class NodeAffiliationsSet(base.CommandBase):

    def __init__(self, host):
        base.CommandBase.__init__(self, host, 'set', use_pubsub_node_req=True, use_verbose=True, help=_(u'set affiliations (for node owner)'))
        self.need_loop=True

    def add_parser_options(self):
        # XXX: we use optional argument syntax for a required one because list of list of 2 elements
        #      (uses to construct dicts) don't work with positional arguments
        self.parser.add_argument("-a",
                                 "--affiliation",
                                 dest="affiliations",
                                 metavar=('JID', 'AFFILIATION'),
                                 required=True,
                                 type=base.unicode_decoder,
                                 action="append",
                                 nargs=2,
                                 help=_(u"entity/affiliation couple(s)"))

    def psNodeAffiliationsSetCb(self):
        self.disp(_(u"affiliations have been set"), 1)
        self.host.quit()

    def psNodeAffiliationsSetEb(self, failure_):
        self.disp(u"can't set node affiliations: {reason}".format(
            reason=failure_), error=True)
        self.host.quit(C.EXIT_BRIDGE_ERRBACK)

    def start(self):
        common.checkURI(self.args)
        affiliations = dict(self.args.affiliations)
        self.host.bridge.psNodeAffiliationsSet(
            self.args.service,
            self.args.node,
            affiliations,
            self.profile,
            callback=self.psNodeAffiliationsSetCb,
            errback=self.psNodeAffiliationsSetEb)


class NodeAffiliations(base.CommandBase):
    subcommands = (NodeAffiliationsGet, NodeAffiliationsSet)

    def __init__(self, host):
        super(NodeAffiliations, self).__init__(host, 'affiliations', use_profile=False, help=_(u'set or retrieve node affiliations'))


class NodeSubscriptionsGet(base.CommandBase):

    def __init__(self, host):
        base.CommandBase.__init__(self, host, 'get', use_output=C.OUTPUT_DICT, use_pubsub_node_req=True, help=_(u'retrieve node subscriptions (for node owner)'))
        self.need_loop=True

    def add_parser_options(self):
        pass

    def psNodeSubscriptionsGetCb(self, subscriptions):
        self.output(subscriptions)
        self.host.quit()

    def psNodeSubscriptionsGetEb(self, failure_):
        self.disp(u"can't get node subscriptions: {reason}".format(
            reason=failure_), error=True)
        self.host.quit(C.EXIT_BRIDGE_ERRBACK)

    def start(self):
        common.checkURI(self.args)
        self.host.bridge.psNodeSubscriptionsGet(
            self.args.service,
            self.args.node,
            self.profile,
            callback=self.psNodeSubscriptionsGetCb,
            errback=self.psNodeSubscriptionsGetEb)


class StoreSubscriptionAction(argparse.Action):
    """Action which handle subscription parameter for owner

    list is given by pairs: jid and subscription state
    if subscription state is not specified, it default to "subscribed"
    """

    def __call__(self, parser, namespace, values, option_string):
        dest_dict = getattr(namespace, self.dest)
        while values:
            jid_s = values.pop(0)
            try:
                subscription = values.pop(0)
            except IndexError:
                subscription = 'subscribed'
            if subscription not in ALLOWED_SUBSCRIPTIONS_OWNER:
                parser.error(_(u"subscription must be one of {}").format(u', '.join(ALLOWED_SUBSCRIPTIONS_OWNER)))
            dest_dict[jid_s] = subscription


class NodeSubscriptionsSet(base.CommandBase):

    def __init__(self, host):
        base.CommandBase.__init__(self, host, 'set', use_pubsub_node_req=True, use_verbose=True, help=_(u'set/modify subscriptions (for node owner)'))
        self.need_loop=True

    def add_parser_options(self):
        # XXX: we use optional argument syntax for a required one because list of list of 2 elements
        #      (uses to construct dicts) don't work with positional arguments
        self.parser.add_argument("-S",
                                 "--subscription",
                                 dest="subscriptions",
                                 default={},
                                 nargs='+',
                                 metavar=('JID [SUSBSCRIPTION]'),
                                 required=True,
                                 type=base.unicode_decoder,
                                 action=StoreSubscriptionAction,
                                 help=_(u"entity/subscription couple(s)"))

    def psNodeSubscriptionsSetCb(self):
        self.disp(_(u"subscriptions have been set"), 1)
        self.host.quit()

    def psNodeSubscriptionsSetEb(self, failure_):
        self.disp(u"can't set node subscriptions: {reason}".format(
            reason=failure_), error=True)
        self.host.quit(C.EXIT_BRIDGE_ERRBACK)

    def start(self):
        common.checkURI(self.args)
        self.host.bridge.psNodeSubscriptionsSet(
            self.args.service,
            self.args.node,
            self.args.subscriptions,
            self.profile,
            callback=self.psNodeSubscriptionsSetCb,
            errback=self.psNodeSubscriptionsSetEb)


class NodeSubscriptions(base.CommandBase):
    subcommands = (NodeSubscriptionsGet, NodeSubscriptionsSet)

    def __init__(self, host):
        super(NodeSubscriptions, self).__init__(host, 'subscriptions', use_profile=False, help=_(u'get or modify node subscriptions'))


class NodeSchemaSet(base.CommandBase):

    def __init__(self, host):
        base.CommandBase.__init__(self, host, 'set', use_pubsub_node_req=True, use_verbose=True, help=_(u'set/replace a schema'))
        self.need_loop = True

    def add_parser_options(self):
        self.parser.add_argument('schema', help=_(u"schema to set (must be XML)"))

    def psSchemaSetCb(self):
        self.disp(_(u'schema has been set'), 1)
        self.host.quit()

    def start(self):
        self.host.bridge.psSchemaSet(
            self.args.service,
            self.args.node,
            self.args.schema,
            self.profile,
            callback=self.psSchemaSetCb,
            errback=partial(self.errback,
                            msg=_(u"can't set schema: {}"),
                            exit_code=C.EXIT_BRIDGE_ERRBACK))


class NodeSchemaEdit(base.CommandBase, common.BaseEdit):
    use_items=False

    def __init__(self, host):
        base.CommandBase.__init__(self, host, 'edit', use_pubsub_node_req=True, use_verbose=True, help=_(u'edit a schema'))
        common.BaseEdit.__init__(self, self.host, PUBSUB_SCHEMA_TMP_DIR)
        self.need_loop=True

    def add_parser_options(self):
        common.BaseEdit.add_parser_options(self)

    def psSchemaSetCb(self):
        self.disp(_(u'schema has been set'), 1)
        self.host.quit()

    def publish(self, schema):
        self.host.bridge.psSchemaSet(
            self.args.service,
            self.args.node,
            schema,
            self.profile,
            callback=self.psSchemaSetCb,
            errback=partial(self.errback,
                            msg=_(u"can't set schema: {}"),
                            exit_code=C.EXIT_BRIDGE_ERRBACK))

    def psSchemaGetCb(self, schema):
        try:
            from lxml import etree
        except ImportError:
            self.disp(u"lxml module must be installed to use edit, please install it with \"pip install lxml\"", error=True)
            self.host.quit(1)
        parser = etree.XMLParser(remove_blank_text=True)
        schema_elt = etree.fromstring(schema, parser)
        content_file_obj, content_file_path = self.getTmpFile()
        content_file_obj.write(etree.tostring(schema_elt, encoding="utf-8", pretty_print=True))
        content_file_obj.seek(0)
        self.runEditor("pubsub_schema_editor_args", content_file_path, content_file_obj)

    def start(self):
        common.checkURI(self.args)
        self.host.bridge.psSchemaGet(
            self.args.service,
            self.args.node,
            self.profile,
            callback=self.psSchemaGetCb,
            errback=partial(self.errback,
                            msg=_(u"can't edit schema: {}"),
                            exit_code=C.EXIT_BRIDGE_ERRBACK))


class NodeSchemaGet(base.CommandBase):

    def __init__(self, host):
        base.CommandBase.__init__(self, host, 'get', use_output=C.OUTPUT_XML, use_pubsub_node_req=True, use_verbose=True, help=_(u'get schema'))
        self.need_loop=True

    def add_parser_options(self):
        pass

    def psSchemaGetCb(self, schema):
        if not schema:
            self.disp(_(u'no schema found'), 1)
            self.host.quit(1)
        self.output(schema)
        self.host.quit()

    def start(self):
        common.checkURI(self.args)
        self.host.bridge.psSchemaGet(
            self.args.service,
            self.args.node,
            self.profile,
            callback=self.psSchemaGetCb,
            errback=partial(self.errback,
                            msg=_(u"can't get schema: {}"),
                            exit_code=C.EXIT_BRIDGE_ERRBACK))


class NodeSchema(base.CommandBase):
    subcommands = (NodeSchemaSet, NodeSchemaEdit, NodeSchemaGet)

    def __init__(self, host):
        super(NodeSchema, self).__init__(host, 'schema', use_profile=False, help=_(u"data schema manipulation"))


class Node(base.CommandBase):
    subcommands = (NodeInfo, NodeCreate, NodeDelete, NodeSet, NodeAffiliations, NodeSubscriptions, NodeSchema)

    def __init__(self, host):
        super(Node, self).__init__(host, 'node', use_profile=False, help=_('node handling'))


class Get(base.CommandBase):

    def __init__(self, host):
        base.CommandBase.__init__(self, host, 'get', use_output=C.OUTPUT_LIST_XML, use_pubsub_node_req=True, help=_(u'get pubsub item(s)'))
        self.need_loop=True

    def add_parser_options(self):
        self.parser.add_argument("-i", "--item", type=base.unicode_decoder, action='append', default=[], dest='items',
                                 help=_(u"item(s) id(s) to get (default: request all items)"))
        self.parser.add_argument("-S", "--sub-id", type=base.unicode_decoder, default=u'',
                                 help=_(u"subscription id"))
        self.parser.add_argument("-m", "--max", type=int, default=10, help=_(u"maximum number of items to get ({} to get all items)".format(C.NO_LIMIT)))
        # TODO: a key(s) argument to select keys to display
        # TODO: add MAM filters


    def psItemsGetCb(self, ps_result):
        self.output(ps_result[0])
        self.host.quit(C.EXIT_OK)

    def psItemsGetEb(self, failure_):
        self.disp(u"can't get pubsub items: {reason}".format(
            reason=failure_), error=True)
        self.host.quit(C.EXIT_BRIDGE_ERRBACK)

    def start(self):
        common.checkURI(self.args)
        self.host.bridge.psItemsGet(
            self.args.service,
            self.args.node,
            self.args.max,
            self.args.items,
            self.args.sub_id,
            {},
            self.profile,
            callback=self.psItemsGetCb,
            errback=self.psItemsGetEb)

class Delete(base.CommandBase):

    def __init__(self, host):
        base.CommandBase.__init__(self, host, 'delete', use_pubsub_node_req=True, help=_(u'delete an item'))
        self.need_loop=True

    def add_parser_options(self):
        self.parser.add_argument("item", nargs='?', type=base.unicode_decoder, help=_(u"item to delete"))
        self.parser.add_argument("-f", "--force", action='store_true', help=_(u"delete without confirmation"))
        self.parser.add_argument("-n", "--notify", action='store_true', help=_(u"notify deletion"))

    def psItemsDeleteCb(self):
        self.disp(_(u'item {item_id} has been deleted').format(item_id=self.args.item))
        self.host.quit(C.EXIT_OK)

    def start(self):
        common.checkURI(self.args)
        if not self.args.item:
            self.parser.error(_(u"You need to specify an item to delete"))
        if not self.args.force:
            message = _(u"Are you sure to delete item {item_id} ?").format(item_id=self.args.item)
            res = raw_input("{} (y/N)? ".format(message))
            if res not in ("y", "Y"):
                self.disp(_(u"Item deletion cancelled"))
                self.host.quit(2)
        self.host.bridge.psRetractItem(
            self.args.service,
            self.args.node,
            self.args.item,
            self.args.notify,
            self.profile,
            callback=self.psItemsDeleteCb,
            errback=partial(self.errback,
                            msg=_(u"can't delete item: {}"),
                            exit_code=C.EXIT_BRIDGE_ERRBACK))


class Edit(base.CommandBase, common.BaseEdit):

    def __init__(self, host):
        base.CommandBase.__init__(self, host, 'edit', use_verbose=True, use_pubsub_node_req=True, help=_(u'edit an existing or new pubsub item'))
        common.BaseEdit.__init__(self, self.host, PUBSUB_TMP_DIR)

    def add_parser_options(self):
        self.parser.add_argument("item", type=base.unicode_decoder, nargs='?', default=u'new', help=_(u"URL of the item to edit, or keyword"))
        common.BaseEdit.add_parser_options(self)

    def edit(self, content_file_path, content_file_obj):
        # we launch editor
        self.runEditor("pubsub_editor_args", content_file_path, content_file_obj)

    def publish(self, content):
        published_id = self.host.bridge.psItemSend(self.pubsub_service, self.pubsub_node, content, self.pubsub_item or '', {}, self.profile)
        if published_id:
            self.disp(u"Item published at {pub_id}".format(pub_id=published_id))
        else:
            self.disp(u"Item published")

    def getItemData(self, service, node, item):
        try:
            from lxml import etree
        except ImportError:
            self.disp(u"lxml module must be installed to use edit, please install it with \"pip install lxml\"", error=True)
            self.host.quit(1)
        items = [item] if item is not None else []
        item_raw =  self.host.bridge.psItemsGet(service, node, 1, items, "", {}, self.profile)[0][0]
        parser = etree.XMLParser(remove_blank_text=True)
        item_elt = etree.fromstring(item_raw, parser)
        item_id = item_elt.get('id')
        try:
            payload = item_elt[0]
        except IndexError:
            self.disp(_(u'Item has not payload'), 1)
            return  u''
        return etree.tostring(payload, encoding="unicode", pretty_print=True), item_id

    def start(self):
        self.pubsub_service, self.pubsub_node, self.pubsub_item, content_file_path, content_file_obj = self.getItemPath(self.args.item)

        self.edit(content_file_path, content_file_obj)


class Subscribe(base.CommandBase):

    def __init__(self, host):
        base.CommandBase.__init__(self, host, 'subscribe', use_pubsub_node_req=True, use_verbose=True, help=_(u'subscribe to a node'))
        self.need_loop=True

    def add_parser_options(self):
        pass

    def psSubscribeCb(self):
        self.disp(_(u'subscription done'), 1)
        self.host.quit()

    def start(self):
        self.host.bridge.psSubscribe(
            self.args.service,
            self.args.node,
            self.profile,
            callback=self.psSubscribeCb,
            errback=partial(self.errback,
                            msg=_(u"can't subscribe to node: {}"),
                            exit_code=C.EXIT_BRIDGE_ERRBACK))


class Unsubscribe(base.CommandBase):
    # TODO: voir pourquoi NodeNotFound sur subscribe juste après unsubscribe

    def __init__(self, host):
        base.CommandBase.__init__(self, host, 'unsubscribe', use_pubsub_node_req=True, use_verbose=True, help=_(u'unsubscribe from a node'))
        self.need_loop=True

    def add_parser_options(self):
        pass

    def psUnsubscribeCb(self):
        self.disp(_(u'subscription removed'), 1)
        self.host.quit()

    def start(self):
        self.host.bridge.psUnsubscribe(
            self.args.service,
            self.args.node,
            self.profile,
            callback=self.psUnsubscribeCb,
            errback=partial(self.errback,
                            msg=_(u"can't unsubscribe from node: {}"),
                            exit_code=C.EXIT_BRIDGE_ERRBACK))


class Subscriptions(base.CommandBase):

    def __init__(self, host):
        base.CommandBase.__init__(self, host, 'subscriptions', use_output=C.OUTPUT_LIST_DICT, use_pubsub=True, help=_(u'retrieve all subscriptions on a service'))
        self.need_loop=True

    def add_parser_options(self):
        pass

    def psSubscriptionsGetCb(self, subscriptions):
        self.output(subscriptions)
        self.host.quit()

    def start(self):
        self.host.bridge.psSubscriptionsGet(
            self.args.service,
            self.args.node,
            self.profile,
            callback=self.psSubscriptionsGetCb,
            errback=partial(self.errback,
                            msg=_(u"can't retrieve subscriptions: {}"),
                            exit_code=C.EXIT_BRIDGE_ERRBACK))


class Affiliations(base.CommandBase):

    def __init__(self, host):
        base.CommandBase.__init__(self, host, 'affiliations', use_output=C.OUTPUT_DICT, use_pubsub=True, help=_(u'retrieve all affiliations on a service'))
        self.need_loop=True

    def add_parser_options(self):
        pass

    def psAffiliationsGetCb(self, affiliations):
        self.output(affiliations)
        self.host.quit()

    def psAffiliationsGetEb(self, failure_):
        self.disp(u"can't get node affiliations: {reason}".format(
            reason=failure_), error=True)
        self.host.quit(C.EXIT_BRIDGE_ERRBACK)

    def start(self):
        self.host.bridge.psAffiliationsGet(
            self.args.service,
            self.args.node,
            self.profile,
            callback=self.psAffiliationsGetCb,
            errback=self.psAffiliationsGetEb)


class Search(base.CommandBase):
    """this command to a search without using MAM, i.e. by checking every items if dound by itself, so it may be heavy in resources both for server and client"""
    RE_FLAGS = re.MULTILINE | re.UNICODE
    EXEC_ACTIONS = (u'exec', u'external')

    def __init__(self, host):
        base.CommandBase.__init__(self, host, 'search', use_output=C.OUTPUT_XML, use_pubsub=True, use_verbose=True, help=_(u'search items corresponding to filters'))
        self.need_loop=True

    @property
    def etree(self):
        """load lxml.etree only if needed"""
        if self._etree is None:
            from lxml import etree
            self._etree = etree
        return self._etree

    def filter_opt(self, value, type_):
        value = base.unicode_decoder(value)
        return (type_, value)

    def filter_flag(self, value, type_):
        value = C.bool(value)
        return (type_, value)

    def add_parser_options(self):
        self.parser.add_argument("-i", "--item", action="append", default=[], dest='items', type=base.unicode_decoder, help=_(u"item id(s)"))
        self.parser.add_argument("-D", "--max-depth", type=int, default=0, help=_(u"maximum depth of recursion (will search linked nodes if > 0, default: 0)"))
        self.parser.add_argument("-m", "--max", type=int, default=30, help=_(u"maximum number of items to get per node ({} to get all items, default: 30)".format(C.NO_LIMIT)))
        self.parser.add_argument("-N", "--namespace", action='append', nargs=2, default=[],
                                 metavar="NAME NAMESPACE", help=_(u"namespace to use for xpath"))

        # filters
        filter_text = partial(self.filter_opt, type_=u'text')
        filter_re = partial(self.filter_opt, type_=u'regex')
        filter_xpath = partial(self.filter_opt, type_=u'xpath')
        filter_python = partial(self.filter_opt, type_=u'python')
        filters = self.parser.add_argument_group(_(u'filters'), _(u'only items corresponding to following filters will be kept'))
        filters.add_argument("-t", "--text",
                             action='append', dest='filters', type=filter_text,
                             metavar='TEXT',
                             help=_(u"full text filter, item must contain this string (XML included)"))
        filters.add_argument("-r", "--regex",
                             action='append', dest='filters', type=filter_re,
                             metavar='EXPRESSION',
                             help=_(u"like --text but using a regular expression"))
        filters.add_argument("-x", "--xpath",
                             action='append', dest='filters', type=filter_xpath,
                             metavar='XPATH',
                             help=_(u"filter items which has elements matching this xpath"))
        filters.add_argument("-P", "--python",
                             action='append', dest='filters', type=filter_python,
                             metavar='PYTHON_CODE',
                             help=_(u'Python expression which much return a bool (True to keep item, False to reject it). "item" is raw text item, "item_xml" is lxml\'s etree.Element'))

        # filters flags
        flag_case = partial(self.filter_flag, type_=u'ignore-case')
        flag_invert = partial(self.filter_flag, type_=u'invert')
        flag_dotall = partial(self.filter_flag, type_=u'dotall')
        flag_matching = partial(self.filter_flag, type_=u'only-matching')
        flags = self.parser.add_argument_group(_(u'filters flags'), _(u'filters modifiers (change behaviour of following filters)'))
        flags.add_argument("-C", "--ignore-case",
                           action='append', dest='filters', type=flag_case,
                           const=('ignore-case', True), nargs='?',
                           metavar='BOOLEAN',
                           help=_(u"(don't) ignore case in following filters (default: case sensitive)"))
        flags.add_argument("-I", "--invert",
                           action='append', dest='filters', type=flag_invert,
                           const=('invert', True), nargs='?',
                           metavar='BOOLEAN',
                           help=_(u"(don't) invert effect of following filters (default: don't invert)"))
        flags.add_argument("-A", "--dot-all",
                           action='append', dest='filters', type=flag_dotall,
                           const=('dotall', True), nargs='?',
                           metavar='BOOLEAN',
                           help=_(u"(don't) use DOTALL option for regex (default: don't use)"))
        flags.add_argument("-o", "--only-matching",
                           action='append', dest='filters', type=flag_matching,
                           const=('only-matching', True), nargs='?',
                           metavar='BOOLEAN',
                           help=_(u"keep only the matching part of the item"))

        # action
        self.parser.add_argument("action",
                                 default="print",
                                 nargs='?',
                                 choices=('print', 'exec', 'external'),
                                 help=_(u"action to do on found items (default: print)"))
        self.parser.add_argument("command", nargs=argparse.REMAINDER)

    def psItemsGetEb(self, failure_, service, node):
        self.disp(u"can't get pubsub items at {service} (node: {node}): {reason}".format(
            service=service,
            node=node,
            reason=failure_), error=True)
        self.to_get -= 1

    def getItems(self, depth, service, node, items):
        search = partial(self.search, depth=depth)
        errback = partial(self.psItemsGetEb, service=service, node=node)
        self.host.bridge.psItemsGet(
            service,
            node,
            self.args.max,
            [],
            "",
            {},
            self.profile,
            callback=search,
            errback=errback
            )
        self.to_get += 1

    def _checkPubsubURL(self, match, found_nodes):
        """check that the matched URL is an xmpp: one

        @param found_nodes(list[unicode]): found_nodes
            this list will be filled while xmpp: URIs are discovered
        """
        url = match.group(0)
        if url.startswith(u'xmpp'):
            try:
                url_data = uri.parseXMPPUri(url)
            except ValueError:
                return
            if url_data[u'type'] == u'pubsub':
                found_node = {u'service': url_data[u'path'],
                              u'node': url_data[u'node']}
                if u'item' in url_data:
                    found_node[u'item'] = url_data[u'item']
                found_nodes.append(found_node)

    def getSubNodes(self, item, depth):
        """look for pubsub URIs in item, and getItems on the linked nodes"""
        found_nodes = []
        checkURI = partial(self._checkPubsubURL, found_nodes=found_nodes)
        strings.RE_URL.sub(checkURI, item)
        for data in found_nodes:
            self.getItems(depth+1,
                          data[u'service'],
                          data[u'node'],
                          [data[u'item']] if u'item' in data else []
                          )

    def parseXml(self, item):
        try:
            return self.etree.fromstring(item)
        except self.etree.XMLSyntaxError:
            self.disp(_(u"item doesn't looks like XML, you have probably used --only-matching somewhere before and we have no more XML"), error=True)
            self.host.quit(C.EXIT_BAD_ARG)

    def filter(self, item):
        """apply filters given on command line

        if only-matching is used, item may be modified
        @return (tuple[bool, unicode]): a tuple with:
            - keep: True if item passed the filters
            - item: it is returned in case of modifications
        """
        ignore_case = False
        invert = False
        dotall = False
        only_matching = False
        item_xml = None
        for type_, value in self.args.filters:
            keep = True

            ## filters

            if type_ == u'text':
                if ignore_case:
                    if value.lower() not in item.lower():
                        keep = False
                else:
                    if value not in item:
                        keep = False
                if keep and only_matching:
                    # doesn't really make sens to keep a fixed string
                    # so we raise an error
                    self.host.disp(_(u"--only-matching used with fixed --text string, are you sure?"), error=True)
                    self.host.quit(C.EXIT_BAD_ARG)
            elif type_ == u'regex':
                flags = self.RE_FLAGS
                if ignore_case:
                    flags |= re.IGNORECASE
                if dotall:
                    flags |= re.DOTALL
                match = re.search(value, item, flags)
                keep = match != None
                if keep and only_matching:
                    item = match.group()
                    item_xml = None
            elif type_ == u'xpath':
                if item_xml is None:
                    item_xml = self.parseXml(item)
                try:
                    elts = item_xml.xpath(value, namespaces=self.args.namespace)
                except self.etree.XPathEvalError as e:
                    self.disp(_(u"can't use xpath: {reason}").format(reason=e), error=True)
                    self.host.quit(C.EXIT_BAD_ARG)
                keep = bool(elts)
                if keep and only_matching:
                    item_xml = elts[0]
                    try:
                        item = self.etree.tostring(item_xml, encoding='unicode')
                    except TypeError:
                        # we have a string only, not an element
                        item = unicode(item_xml)
                        item_xml = None
            elif type_ == u'python':
                if item_xml is None:
                    item_xml = self.parseXml(item)
                cmd_ns = {u'item': item,
                          u'item_xml': item_xml
                         }
                try:
                    keep = eval(value, cmd_ns)
                except SyntaxError as e:
                    self.disp(unicode(e), error=True)
                    self.host.quit(C.EXIT_BAD_ARG)

            ## flags

            elif type_ == u'ignore-case':
                ignore_case = value
            elif type_ == u'invert':
                invert = value
                # we need to continue, else loop would end here
                continue
            elif type_ == u'dotall':
                dotall = value
            elif type_ == u'only-matching':
                only_matching = value
            else:
                raise exceptions.InternalError(_(u"unknown filter type {type}").format(type=type_))

            if invert:
                keep = not keep
            if not keep:
                return False, item

        return True, item

    def doItemAction(self, item, metadata):
        """called when item has been kepts and the action need to be done

        @param item(unicode): accepted item
        """
        action = self.args.action
        if action == u'print' or self.host.verbosity > 0:
            try:
                self.output(item)
            except self.etree.XMLSyntaxError:
                # item is not valid XML, but a string
                # can happen when --only-matching is used
                self.disp(item)
        if action in self.EXEC_ACTIONS:
            item_elt = self.parseXml(item)
            if action == u'exec':
                use = {'service': metadata[u'service'],
                       'node': metadata[u'node'],
                       'item': item_elt.get('id'),
                       'profile': self.profile
                       }
                # we need to send a copy of self.args.command
                # else it would be modified
                parser_args, use_args = arg_tools.get_use_args(self.host,
                    self.args.command,
                    use,
                    verbose=self.host.verbosity > 1
                    )
                cmd_args = sys.argv[0:1] + parser_args + use_args
            else:
                cmd_args = self.args.command


            self.disp(u'COMMAND: {command}'.format(
                command = u' '.join([arg_tools.escape(a) for a in cmd_args])), 2)
            if action == u'exec':
                ret = subprocess.call(cmd_args)
            else:
                p = subprocess.Popen(cmd_args, stdin=subprocess.PIPE)
                p.communicate(item.encode('utf-8'))
                ret = p.wait()
            if ret != 0:
                self.disp(A.color(C.A_FAILURE, _(u"executed command failed with exit code {code}").format(code=ret)))

    def search(self, items_data, depth):
        """callback of getItems

        this method filters items, get sub nodes if needed,
        do the requested action, and exit the command when everything is done
        @param items_data(tuple): result of getItems
        @param depth(int): current depth level
            0 for first node, 1 for first children, and so on
        """
        items, metadata = items_data
        for item in items:
            if depth < self.args.max_depth:
                self.getSubNodes(item, depth)
            keep, item = self.filter(item)
            if not keep:
                continue
            self.doItemAction(item, metadata)

        # we check if we got all getItems results
        self.to_get -= 1
        if self.to_get == 0:
            # yes, we can quit
            self.host.quit()
        assert self.to_get > 0

    def start(self):
        if self.args.command:
            if self.args.action not in self.EXEC_ACTIONS:
                self.parser.error(_(u"Command can only be used with {actions} actions").format(
                    actions=u', '.join(self.EXEC_ACTIONS)))
        else:
            if self.args.action in self.EXEC_ACTIONS:
                self.parser.error(_(u"you need to specify a command to execute"))
        if not self.args.node:
            # TODO: handle get service affiliations when node is not set
            self.parser.error(_(u"empty node is not handled yet"))
        # to_get is increased on each get and decreased on each answer
        # when it reach 0 again, the command is finished
        self.to_get = 0
        self._etree = None
        if self.args.filters is None:
            self.args.filters = []
        self.args.namespace = dict(self.args.namespace + [('pubsub', "http://jabber.org/protocol/pubsub")])
        common.checkURI(self.args)
        self.getItems(0, self.args.service, self.args.node, self.args.items)


class Uri(base.CommandBase):

    def __init__(self, host):
        base.CommandBase.__init__(self, host, 'uri', use_profile=False, use_pubsub_node_req=True, help=_(u'build URI'))
        self.need_loop=True

    def add_parser_options(self):
        self.parser.add_argument("-i", "--item", type=base.unicode_decoder, help=_(u"item to link"))
        self.parser.add_argument("-p", "--profile", type=base.unicode_decoder, default=C.PROF_KEY_DEFAULT, help=_(u"profile (used when no server is specified)"))

    def display_uri(self, jid_):
        uri_args = {}
        if not self.args.service:
            self.args.service = jid.JID(jid_).bare

        for key in ('node', 'service', 'item'):
            value = getattr(self.args, key)
            if key == 'service':
                key = 'path'
            if value:
                uri_args[key] = value
        self.disp(uri.buildXMPPUri(u'pubsub', **uri_args))
        self.host.quit()

    def start(self):
        if not self.args.service:
            self.host.bridge.asyncGetParamA(
                u'JabberID',
                u'Connection',
                profile_key=self.args.profile,
                callback=self.display_uri,
                errback=partial(self.errback,
                                msg=_(u"can't retrieve jid: {}"),
                                exit_code=C.EXIT_BRIDGE_ERRBACK))
        else:
            self.display_uri(None)


class HookCreate(base.CommandBase):

    def __init__(self, host):
        base.CommandBase.__init__(self, host, 'create', use_pubsub_node_req=True, help=_(u'create a Pubsub hook'))
        self.need_loop=True

    def add_parser_options(self):
        self.parser.add_argument('-t', '--type', default=u'python', choices=('python', 'python_file', 'python_code'), help=_(u"hook type"))
        self.parser.add_argument('-P', '--persistent', action='store_true', help=_(u"make hook persistent across restarts"))
        self.parser.add_argument("hook_arg", type=base.unicode_decoder, help=_(u"argument of the hook (depend of the type)"))

    @staticmethod
    def checkArgs(self):
        if self.args.type == u'python_file':
            self.args.hook_arg = os.path.abspath(self.args.hook_arg)
            if not os.path.isfile(self.args.hook_arg):
                self.parser.error(_(u"{path} is not a file").format(path=self.args.hook_arg))

    def start(self):
        common.checkURI(self.args)
        self.checkArgs(self)
        self.host.bridge.psHookAdd(
            self.args.service,
            self.args.node,
            self.args.type,
            self.args.hook_arg,
            self.args.persistent,
            self.profile,
            callback=self.host.quit,
            errback=partial(self.errback,
                            msg=_(u"can't create hook: {}"),
                            exit_code=C.EXIT_BRIDGE_ERRBACK))


class HookDelete(base.CommandBase):

    def __init__(self, host):
        base.CommandBase.__init__(self, host, 'delete', use_pubsub_node_req=True, help=_(u'delete a Pubsub hook'))
        self.need_loop=True

    def add_parser_options(self):
        self.parser.add_argument('-t', '--type', default=u'', choices=('', 'python', 'python_file', 'python_code'), help=_(u"hook type to remove, empty to remove all (default: remove all)"))
        self.parser.add_argument('-a', '--arg', dest='hook_arg', type=base.unicode_decoder, default=u'', help=_(u"argument of the hook to remove, empty to remove all (default: remove all)"))

    def psHookRemoveCb(self, nb_deleted):
        self.disp(_(u'{nb_deleted} hook(s) have been deleted').format(
            nb_deleted = nb_deleted))
        self.host.quit()

    def start(self):
        common.checkURI(self.args)
        HookCreate.checkArgs(self)
        self.host.bridge.psHookRemove(
            self.args.service,
            self.args.node,
            self.args.type,
            self.args.hook_arg,
            self.profile,
            callback=self.psHookRemoveCb,
            errback=partial(self.errback,
                            msg=_(u"can't delete hook: {}"),
                            exit_code=C.EXIT_BRIDGE_ERRBACK))


class HookList(base.CommandBase):

    def __init__(self, host):
        base.CommandBase.__init__(self, host, 'list', use_output=C.OUTPUT_LIST_DICT, help=_(u'list hooks of a profile'))
        self.need_loop = True

    def add_parser_options(self):
        pass

    def psHookListCb(self, data):
        if not data:
            self.disp(_(u'No hook found.'))
        self.output(data)
        self.host.quit()

    def start(self):
        self.host.bridge.psHookList(
            self.profile,
            callback=self.psHookListCb,
            errback=partial(self.errback,
                            msg=_(u"can't list hooks: {}"),
                            exit_code=C.EXIT_BRIDGE_ERRBACK))


class Hook(base.CommandBase):
    subcommands = (HookCreate, HookDelete, HookList)

    def __init__(self, host):
        super(Hook, self).__init__(host, 'hook', use_profile=False, use_verbose=True, help=_('trigger action on Pubsub notifications'))


class Pubsub(base.CommandBase):
    subcommands = (Get, Delete, Edit, Subscribe, Unsubscribe, Subscriptions, Node, Affiliations, Search, Hook, Uri)

    def __init__(self, host):
        super(Pubsub, self).__init__(host, 'pubsub', use_profile=False, help=_('PubSub nodes/items management'))