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

# jp: a SàT command line tool
# Copyright (C) 2009-2018 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.tools.common.ansi import ANSI as A
from sat_frontends.jp.constants import Const as C
from sat_frontends.jp import common
from functools import partial
from dateutil import parser as du_parser
import calendar
import time

__commands__ = ["Event"]

OUTPUT_OPT_TABLE = u'table'

# TODO: move date parsing to base, it may be useful for other commands


class Get(base.CommandBase):

    def __init__(self, host):
        base.CommandBase.__init__(self,
                                  host,
                                  'get',
                                  use_output=C.OUTPUT_DICT,
                                  use_pubsub=True, pubsub_flags={C.NODE, C.ITEM, C.SINGLE_ITEM},
                                  use_verbose=True,
                                  help=_(u'get event data'))
        self.need_loop=True

    def add_parser_options(self):
        pass

    def eventInviteeGetCb(self, result):
        event_date, event_data = result
        event_data['date'] = event_date
        self.output(event_data)
        self.host.quit()

    def start(self):
        self.host.bridge.eventGet(
            self.args.service,
            self.args.node,
            self.args.item,
            self.profile,
            callback=self.eventInviteeGetCb,
            errback=partial(self.errback,
                            msg=_(u"can't get event data: {}"),
                            exit_code=C.EXIT_BRIDGE_ERRBACK))


class EventBase(object):

    def add_parser_options(self):
        self.parser.add_argument("-i", "--id", type=base.unicode_decoder, default=u'', help=_(u"ID of the PubSub Item"))
        self.parser.add_argument("-d", "--date", type=unicode, help=_(u"date of the event"))
        self.parser.add_argument("-f", "--field", type=base.unicode_decoder, action='append', nargs=2, dest='fields',
                                 metavar=(u"KEY", u"VALUE"), help=_(u"configuration field to set"))

    def parseFields(self):
        return dict(self.args.fields) if self.args.fields else {}

    def parseDate(self):
        if self.args.date:
            try:
                date = int(self.args.date)
            except ValueError:
                try:
                    date_time = du_parser.parse(self.args.date, dayfirst=not (u'-' in self.args.date))
                except ValueError as e:
                    self.parser.error(_(u"Can't parse date: {msg}").format(msg=e))
                if date_time.tzinfo is None:
                    date = calendar.timegm(date_time.timetuple())
                else:
                    date = time.mktime(date_time.timetuple())
        else:
            date = -1
        return date


class Create(EventBase, base.CommandBase):
    def __init__(self, host):
        super(Create, self).__init__(host, 'create', use_pubsub=True, pubsub_flags={C.NODE}, help=_('create or replace event'))
        EventBase.__init__(self)
        self.need_loop=True

    def eventCreateCb(self, node):
        self.disp(_(u'Event created successfuly on node {node}').format(node=node))
        self.host.quit()

    def start(self):
        fields = self.parseFields()
        date = self.parseDate()
        self.host.bridge.eventCreate(
            date,
            fields,
            self.args.service,
            self.args.node,
            self.args.id,
            self.profile,
            callback=self.eventCreateCb,
            errback=partial(self.errback,
                            msg=_(u"can't create event: {}"),
                            exit_code=C.EXIT_BRIDGE_ERRBACK))


class Modify(EventBase, base.CommandBase):
    def __init__(self, host):
        super(Modify, self).__init__(host, 'modify', use_pubsub=True, pubsub_flags={C.NODE}, help=_('modify an existing event'))
        EventBase.__init__(self)
        self.need_loop=True

    def start(self):
        fields = self.parseFields()
        date = 0 if not self.args.date else self.parseDate()
        self.host.bridge.eventModify(
            self.args.service,
            self.args.node,
            self.args.id,
            date,
            fields,
            self.profile,
            callback=self.host.quit,
            errback=partial(self.errback,
                            msg=_(u"can't update event data: {}"),
                            exit_code=C.EXIT_BRIDGE_ERRBACK))


class InviteeGet(base.CommandBase):

    def __init__(self, host):
        base.CommandBase.__init__(self,
                                  host,
                                  'get',
                                  use_output=C.OUTPUT_DICT,
                                  use_pubsub=True, pubsub_flags={C.NODE, C.ITEM, C.SINGLE_ITEM},
                                  use_verbose=True,
                                  help=_(u'get event attendance'))
        self.need_loop=True

    def add_parser_options(self):
        pass

    def eventInviteeGetCb(self, event_data):
        self.output(event_data)
        self.host.quit()

    def start(self):
        self.host.bridge.eventInviteeGet(
            self.args.service,
            self.args.node,
            self.profile,
            callback=self.eventInviteeGetCb,
            errback=partial(self.errback,
                            msg=_(u"can't get event data: {}"),
                            exit_code=C.EXIT_BRIDGE_ERRBACK))


class InviteeSet(base.CommandBase):
    def __init__(self, host):
        super(InviteeSet, self).__init__(host, 'set', use_output=C.OUTPUT_DICT, use_pubsub=True, pubsub_flags={C.NODE}, help=_('set event attendance'))
        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',
                                 metavar=(u"KEY", u"VALUE"), help=_(u"configuration field to set"))

    def start(self):
        fields = dict(self.args.fields) if self.args.fields else {}
        self.host.bridge.eventInviteeSet(
            self.args.service,
            self.args.node,
            fields,
            self.profile,
            callback=self.host.quit,
            errback=partial(self.errback,
                            msg=_(u"can't set event data: {}"),
                            exit_code=C.EXIT_BRIDGE_ERRBACK))


class InviteesList(base.CommandBase):

    def __init__(self, host):
        extra_outputs = {'default': self.default_output}
        base.CommandBase.__init__(self,
                                  host,
                                  'list',
                                  use_output=C.OUTPUT_DICT_DICT,
                                  extra_outputs=extra_outputs,
                                  use_pubsub=True, pubsub_flags={C.NODE},
                                  use_verbose=True,
                                  help=_(u'get event attendance'))
        self.need_loop=True

    def add_parser_options(self):
        self.parser.add_argument('-m', '--missing', action='store_true', help=_(u'show missing people (invited but no R.S.V.P. so far)'))
        self.parser.add_argument('-R', '--no-rsvp', action='store_true', help=_(u"don't show people which gave R.S.V.P."))

    def _attend_filter(self, attend, row):
        if attend == u'yes':
            attend_color = C.A_SUCCESS
        elif attend == u'no':
            attend_color = C.A_FAILURE
        else:
            attend_color = A.FG_WHITE
        return A.color(attend_color, attend)

    def _guests_filter(self, guests):
        return u'(' + unicode(guests) + ')' if guests else u''

    def default_output(self, event_data):
        data = []
        attendees_yes = 0
        attendees_maybe = 0
        attendees_no = 0
        attendees_missing = 0
        guests = 0
        guests_maybe = 0
        for jid_, jid_data in event_data.iteritems():
            jid_data[u'jid'] = jid_
            try:
                guests_int = int(jid_data['guests'])
            except (ValueError, KeyError):
                pass
            attend = jid_data.get(u'attend',u'')
            if attend == 'yes':
                attendees_yes += 1
                guests += guests_int
            elif attend == 'maybe':
                attendees_maybe += 1
                guests_maybe += guests_int
            elif attend == 'no':
                attendees_no += 1
                jid_data[u'guests'] = ''
            else:
                attendees_missing += 1
                jid_data[u'guests'] = ''
            data.append(jid_data)

        show_table = OUTPUT_OPT_TABLE in self.args.output_opts

        table = common.Table.fromDict(self.host,
            data,
            (u'nick',) + ((u'jid',) if self.host.verbosity else ()) +  (u'attend', 'guests'),
            headers=None,
            filters = { u'nick': A.color(C.A_HEADER, u'{}' if show_table else u'{} '),
                        u'jid': u'{}' if show_table else u'{} ',
                        u'attend': self._attend_filter,
                        u'guests': u'{}' if show_table else self._guests_filter,
                      },
            defaults = { u'nick': u'',
                         u'attend': u'',
                         u'guests': 1
                       }
            )
        if show_table:
            table.display()
        else:
            table.display_blank(show_header=False, col_sep=u'')

        if not self.args.no_rsvp:
            self.disp(u'')
            self.disp(A.color(
                C.A_SUBHEADER,
                _(u'Attendees: '),
                A.RESET,
                unicode(len(data)),
                _(u' ('),
                C.A_SUCCESS,
                _(u'yes: '),
                unicode(attendees_yes),
                A.FG_WHITE,
                _(u', maybe: '),
                unicode(attendees_maybe),
                u', ',
                C.A_FAILURE,
                _(u'no: '),
                unicode(attendees_no),
                A.RESET,
                u')'
                ))
            self.disp(A.color(C.A_SUBHEADER, _(u'confirmed guests: '), A.RESET, unicode(guests)))
            self.disp(A.color(C.A_SUBHEADER, _(u'unconfirmed guests: '), A.RESET, unicode(guests_maybe)))
            self.disp(A.color(C.A_SUBHEADER, _(u'total: '), A.RESET, unicode(guests+guests_maybe)))
        if attendees_missing:
            self.disp('')
            self.disp(A.color(C.A_SUBHEADER, _(u'missing people (no reply): '), A.RESET, unicode(attendees_missing)))

    def eventInviteesListCb(self, event_data, prefilled_data):
        """fill nicknames and keep only requested people

        @param event_data(dict): R.S.V.P. answers
        @param prefilled_data(dict): prefilled data with all people
            only filled if --missing is used
        """
        if self.args.no_rsvp:
            for jid_ in event_data:
                # if there is a jid in event_data
                # it must be there in prefilled_data too
                # so no need to check for KeyError
                del prefilled_data[jid_]
        else:
            # we replace empty dicts for existing people with R.S.V.P. data
            prefilled_data.update(event_data)

        # we get nicknames for everybody, make it easier for organisers
        for jid_, data in prefilled_data.iteritems():
            id_data = self.host.bridge.identityGet(jid_, self.profile)
            data[u'nick'] = id_data.get(u'nick', u'')

        self.output(prefilled_data)
        self.host.quit()

    def getList(self, prefilled_data={}):
        self.host.bridge.eventInviteesList(
            self.args.service,
            self.args.node,
            self.profile,
            callback=partial(self.eventInviteesListCb,
                             prefilled_data=prefilled_data),
            errback=partial(self.errback,
                            msg=_(u"can't get event data: {}"),
                            exit_code=C.EXIT_BRIDGE_ERRBACK))

    def psNodeAffiliationsGetCb(self, affiliations):
        # we fill all affiliations with empty data
        # answered one will be filled in eventInviteesListCb
        # we only consider people with "publisher" affiliation as invited, creators are not, and members can just observe
        prefilled = {jid_: {} for jid_, affiliation in affiliations.iteritems() if affiliation in (u'publisher',)}
        self.getList(prefilled)

    def start(self):
        if self.args.no_rsvp and not self.args.missing:
            self.parser.error(_(u"you need to use --missing if you use --no-rsvp"))
        if self.args.missing:
            self.host.bridge.psNodeAffiliationsGet(
                self.args.service,
                self.args.node,
                self.profile,
                callback=self.psNodeAffiliationsGetCb,
                errback=partial(self.errback,
                                msg=_(u"can't get event data: {}"),
                                exit_code=C.EXIT_BRIDGE_ERRBACK))
        else:
            self.getList()


class InviteeInvite(base.CommandBase):

    def __init__(self, host):
        base.CommandBase.__init__(self, host, 'invite', use_pubsub=True, pubsub_flags={C.NODE, C.SINGLE_ITEM}, help=_(u'invite someone to the event through email'))
        self.need_loop=True

    def add_parser_options(self):
        self.parser.add_argument("-e", "--email", action="append", type=base.unicode_decoder, default=[], help='email(s) to send the invitation to')
        self.parser.add_argument("-N", "--name", type=base.unicode_decoder, default='', help='name of the invitee')
        self.parser.add_argument("-H", "--host-name", type=base.unicode_decoder, default='', help='name of the host')
        self.parser.add_argument("-l", "--lang", type=base.unicode_decoder, default='', help='main language spoken by the invitee')
        self.parser.add_argument("-U", "--url-template", type=base.unicode_decoder, default='', help='template to construct the URL')
        self.parser.add_argument("-S", "--subject", type=base.unicode_decoder, default='', help='subject of the invitation email (default: generic subject)')
        self.parser.add_argument("-b", "--body", type=base.unicode_decoder, default='', help='body of the invitation email (default: generic body)')

    def start(self):
        email = self.args.email[0] if self.args.email else None
        emails_extra = self.args.email[1:]

        self.host.bridge.eventInvite(
            self.args.service,
            self.args.node,
            self.args.item,
            email,
            emails_extra,
            self.args.name,
            self.args.host_name,
            self.args.lang,
            self.args.url_template,
            self.args.subject,
            self.args.body,
            self.args.profile,
            callback=self.host.quit,
            errback=partial(self.errback,
                            msg=_(u"can't create invitation: {}"),
                            exit_code=C.EXIT_BRIDGE_ERRBACK))


class Invitee(base.CommandBase):
    subcommands = (InviteeGet, InviteeSet, InviteesList, InviteeInvite)

    def __init__(self, host):
        super(Invitee, self).__init__(host, 'invitee', use_profile=False, help=_(u'manage invities'))


class Event(base.CommandBase):
    subcommands = (Get, Create, Modify, Invitee)

    def __init__(self, host):
        super(Event, self).__init__(host, 'event', use_profile=False, help=_('event management'))