#!/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_frontends.jp.constants import Const as C
from functools import partial

__commands__ = ["Pubsub"]


class NodeCommon(object):
    node_required = True

    def __init__(self, node_required=True):
        self.node_required = node_required

    def add_parser_options(self):
        self.parser.add_argument("-s", "--service", type=base.unicode_decoder, default=u'',
                                 help=_(u"JID of the PubSub service (default: PEP service)"))
        if self.node_required:
            self.parser.add_argument("node", type=base.unicode_decoder, help=_(u"node to request"))
        else:
            self.parser.add_argument("-n", "--node", type=base.unicode_decoder, default=u'', help=_(u"node to request"))


class NodeInfo(base.CommandBase, NodeCommon):

    def __init__(self, host):
        base.CommandBase.__init__(self, host, 'info', use_output=C.OUTPUT_DICT, 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"))
        NodeCommon.add_parser_options(self)

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


class NodeCreate(base.CommandBase, NodeCommon):

    def __init__(self, host):
        NodeCommon.__init__(self, node_required=False)
        base.CommandBase.__init__(self, host, 'create', use_output=C.OUTPUT_DICT, 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',
                                 required=True, metavar=(u"KEY", u"VALUE"), help=_(u"configuration field to set (required)"))
        self.parser.add_argument("-F", "--full-prefix", action="store_true", help=_(u"don't prepend \"pubsub#\" prefix to field names"))
        NodeCommon.add_parser_options(self)

    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, NodeCommon):

    def __init__(self, host):
        base.CommandBase.__init__(self, host, 'delete', 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'))
        NodeCommon.add_parser_options(self)

    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, NodeCommon):

    def __init__(self, host):
        base.CommandBase.__init__(self, host, 'set', use_output=C.OUTPUT_DICT, 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)"))
        NodeCommon.add_parser_options(self)

    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):
        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, NodeCommon):

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

    def add_parser_options(self):
        NodeCommon.add_parser_options(self)

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


class NodeAffiliationsSet(base.CommandBase, NodeCommon):

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

    def add_parser_options(self):
        NodeCommon.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):
        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 Node(base.CommandBase):
    subcommands = (NodeInfo, NodeCreate, NodeDelete, NodeSet, NodeAffiliations)

    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, 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
        self.parser.add_argument("-s", "--service", type=base.unicode_decoder, default=u'',
                                 help=_(u"JID of the PubSub service (default: request profile own pubsub)"))
        self.parser.add_argument("node", type=base.unicode_decoder, help=_(u"node to request"))
        # TODO: add MAM filters


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

    def psItemGetEb(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):
        self.host.bridge.psItemGet(
            self.args.service,
            self.args.node,
            self.args.max,
            self.args.items,
            self.args.sub_id,
            {},
            self.profile,
            callback=self.psItemGetCb,
            errback=self.psItemGetEb)


class Affiliations(base.CommandBase):

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

    def add_parser_options(self):
        self.parser.add_argument("-n", "--node", type=base.unicode_decoder, default=u'', help=_(u"node to request"))
        self.parser.add_argument("-s", "--service", type=base.unicode_decoder, default=u'',
                                 help=_(u"JID of the PubSub service (default: request profile own pubsub)"))

    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 Pubsub(base.CommandBase):
    subcommands = (Get, Node, Affiliations)

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