#!/usr/bin/python
# -*- coding: utf-8 -*-

# Cagou: desktop/mobile frontend for Salut à Toi XMPP client
# Copyright (C) 2016-2018 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/>.


from sat.core import log as logging
log = logging.getLogger(__name__)
from cagou.core.constants import Const as C
from sat.core.i18n import _
from sat_frontends.quick_frontend.quick_contact_list import QuickContactList
from sat_frontends.tools import jid
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.behaviors import ButtonBehavior
from cagou.core.utils import FilterBehavior
from cagou.core.menu import SideMenu
from kivy.metrics import dp
from kivy import properties
from cagou.core import cagou_widget
from cagou.core import image
from cagou import G
from functools import partial
import bisect
import re


PLUGIN_INFO = {
    "name": _(u"contacts"),
    "main": "ContactList",
    "description": _(u"list of contacts"),
    "icon_medium": u"{media}/icons/muchoslava/png/contact_list_no_border_blue_44.png"
}


class AddContactMenu(SideMenu):
    profile = properties.StringProperty()
    instructions = properties.StringProperty(_(u"Please enter new contact JID"))
    size_hint_close = (1, 0)
    size_hint_open = (1, 0.5)

    def __init__(self, **kwargs):
        super(AddContactMenu, self).__init__(**kwargs)
        if self.profile is None:
            log.warning(_(u"profile not set in AddContactMenu"))
            self.profile = next(iter(G.host.profiles))

    def addContact(self, contact_jid):
        """Actually add the contact

        @param contact_jid(unicode): jid of the contact to add
        """
        contact_jid = contact_jid.strip()
        # FIXME: trivial jid verification
        if not contact_jid or not re.match(r"[^@ ]+@[^@ ]+", contact_jid):
            return
        contact_jid = jid.JID(contact_jid).bare
        G.host.bridge.addContact(contact_jid,
            self.profile,
            callback=lambda: G.host.addNote(
                _(u"contact request"),
                _(u"a contact request has been sent to {contact_jid}").format(
                    contact_jid=contact_jid)),
            errback=partial(G.host.errback,
                title=_(u"can't add contact"),
                message=_(u"error while trying to add contact: {msg}")))
        self.hide()


class Avatar(image.Image):
    pass


class ContactItem(ButtonBehavior, BoxLayout):
    base_width = dp(150)
    profile = properties.StringProperty()
    data = properties.DictProperty()
    jid = properties.StringProperty('')

    def __init__(self, **kwargs):
        super(ContactItem, self).__init__(**kwargs)

    def on_release(self):
        assert self.profile
        # XXX: for now clicking on an item launch the corresponding Chat widget
        #      behaviour should change in the future
        try:
            # FIXME: Q&D way to get chat plugin, should be replaced by a clean method
            #        in host
            plg_infos = [p for p in G.host.getPluggedWidgets()
                         if 'chat' in p['import_name']][0]
        except IndexError:
            log.warning(u"No plugin widget found to display chat")
        else:
            factory = plg_infos['factory']
            G.host.switchWidget(self, factory(plg_infos,
                                              jid.JID(self.jid),
                                              profiles=[self.profile]))


class ContactList(QuickContactList, cagou_widget.CagouWidget, FilterBehavior):
    float_layout = properties.ObjectProperty()
    layout = properties.ObjectProperty()

    def __init__(self, host, target, profiles):
        QuickContactList.__init__(self, G.host, profiles)
        cagou_widget.CagouWidget.__init__(self)
        FilterBehavior.__init__(self)
        self._wid_map = {}  # (profile, bare_jid) to widget map
        self.postInit()
        if len(self.profiles) != 1:
            raise NotImplementedError('multi profiles is not implemented yet')
        self.update(profile=next(iter(self.profiles)))

    def addContactMenu(self):
        """Show the "add a contact" menu"""
        # FIXME: for now we add contact to the first profile we find
        profile = next(iter(self.profiles))
        AddContactMenu(profile=profile).show()

    def onHeaderInputComplete(self, wid, text):
        self.do_filter(self.layout.children,
                       text,
                       lambda c: c.jid,
                       width_cb=lambda c: c.base_width,
                       height_cb=lambda c: c.minimum_height,
                       )

    def _addContactItem(self, bare_jid, profile):
        """Create a new ContactItem instance, and add it

        item will be added in a sorted position
        @param bare_jid(jid.JID): entity bare JID
        @param profile(unicode): profile where the contact is
        """
        data = G.host.contact_lists[profile].getItem(bare_jid)
        wid = ContactItem(profile=profile, data=data, jid=bare_jid)
        child_jids = [c.jid for c in reversed(self.layout.children)]
        idx = bisect.bisect_right(child_jids, bare_jid)
        self.layout.add_widget(wid, -idx)
        self._wid_map[(profile, bare_jid)] = wid

    def update(self, entities=None, type_=None, profile=None):
        log.debug("update: %s %s %s" % (entities, type_, profile))
        if type_ == None or type_ == C.UPDATE_STRUCTURE:
            log.debug("full contact list update")
            self.layout.clear_widgets()
            for bare_jid, data in self.items_sorted.iteritems():
                wid = ContactItem(profile=profile, data=data, jid=bare_jid)
                self.layout.add_widget(wid)
                self._wid_map[(profile, bare_jid)] = wid
        elif type_ == C.UPDATE_MODIFY:
            for entity in entities:
                entity_bare = entity.bare
                wid = self._wid_map[(profile, entity_bare)]
                wid.data = G.host.contact_lists[profile].getItem(entity_bare)
        elif type_ == C.UPDATE_ADD:
            for entity in entities:
                self._addContactItem(entity.bare, profile)
        elif type_ == C.UPDATE_DELETE:
            for entity in entities:
                try:
                    self.layout.remove_widget(self._wid_map.pop((profile, entity.bare)))
                except KeyError:
                    log.debug("entity not found: {entity}".format(entity=entity.bare))
        else:
            log.debug("update type not handled: {update_type}".format(update_type=type_))