#!/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.i18n import _
from sat.core import log as logging
log = logging.getLogger(__name__)
from cagou.core.constants import Const as C
from cagou.core.common import JidToggle
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.label import Label
from kivy.uix.popup import Popup
from cagou.core.utils import FilterBehavior
from kivy import properties
from kivy.garden import contextmenu
from sat_frontends.quick_frontend import quick_menus
from kivy.core.window import Window
from kivy.animation import Animation
from kivy.metrics import dp
from cagou import G
import webbrowser

ABOUT_TITLE = _(u"About {}".format(C.APP_NAME))
ABOUT_CONTENT = _(u"""Cagou (Salut à Toi) v{version}

Cagou is a libre communication tool based on libre standard XMPP.

Cagou is part of the "Salut à Toi" project
more informations at [color=5500ff][ref=website]salut-a-toi.org[/ref][/color]
""").format(version=C.APP_VERSION)


class AboutContent(Label):

    def on_ref_press(self, value):
        if value == "website":
            webbrowser.open("https://salut-a-toi.org")


class AboutPopup(Popup):

    def on_touch_down(self, touch):
        if self.collide_point(*touch.pos):
            self.dismiss()
        return super(AboutPopup, self).on_touch_down(touch)


class MainMenu(contextmenu.AppMenu):
    pass


class MenuItem(contextmenu.ContextMenuTextItem):
    item = properties.ObjectProperty()

    def on_item(self, instance, item):
        self.text = item.name

    def on_release(self):
        super(MenuItem, self).on_release()
        self.parent.hide()
        selected = G.host.selected_widget
        profile = None
        if selected is not None:
            try:
                profile = selected.profile
            except AttributeError:
                pass

        if profile is None:
            try:
                profile = list(selected.profiles)[0]
            except (AttributeError, IndexError):
                try:
                    profile = list(G.host.profiles)[0]
                except IndexError:
                    log.warning(u"Can't find profile")
        self.item.call(selected, profile)


class MenuSeparator(contextmenu.ContextMenuDivider):
    pass


class RootMenuContainer(contextmenu.AppMenuTextItem):
    pass


class MenuContainer(contextmenu.ContextMenuTextItem):
    pass


class MenusWidget(BoxLayout):

    def update(self, type_, caller=None):
        """Method to call when menus have changed

        @param type_(unicode): menu type like in sat.core.sat_main.importMenu
        @param caller(Widget): instance linked to the menus
        """
        self.menus_container = G.host.menus.getMainContainer(type_)
        self.createMenus(caller)

    def _buildMenus(self, container, caller=None):
        """Recursively build menus of the container

        @param container(quick_menus.MenuContainer): menu container
        @param caller(Widget): instance linked to the menus
        """
        if caller is None:
            main_menu = MainMenu()
            self.add_widget(main_menu)
            caller = main_menu
        else:
            context_menu = contextmenu.ContextMenu()
            caller.add_widget(context_menu)
            # FIXME: next line is needed after parent is set to avoid a display bug in contextmenu
            # TODO: fix this upstream
            context_menu._on_visible(False)

            caller = context_menu

        for child in container.getActiveMenus():
            if isinstance(child, quick_menus.MenuContainer):
                if isinstance(caller, MainMenu):
                    menu_container = RootMenuContainer()
                else:
                    menu_container = MenuContainer()
                menu_container.text = child.name
                caller.add_widget(menu_container)
                self._buildMenus(child, caller=menu_container)
            elif isinstance(child, quick_menus.MenuSeparator):
                wid = MenuSeparator()
                caller.add_widget(wid)
            elif isinstance(child, quick_menus.MenuItem):
                wid = MenuItem(item=child)
                caller.add_widget(wid)
            else:
                log.error(u"Unknown child type: {}".format(child))

    def createMenus(self, caller):
        self.clear_widgets()
        self._buildMenus(self.menus_container, caller)

    def onAbout(self):
        about = AboutPopup()
        about.title = ABOUT_TITLE
        about.content = AboutContent(text=ABOUT_CONTENT, markup=True)
        about.open()


class TransferItem(BoxLayout):
    plug_info = properties.DictProperty()

    def on_touch_up(self, touch):
        if not self.collide_point(*touch.pos):
            return super(TransferItem, self).on_touch_up(touch)
        else:
            transfer_menu = self.parent
            while not isinstance(transfer_menu, TransferMenu):
                transfer_menu = transfer_menu.parent
            transfer_menu.do_callback(self.plug_info)
            return True


class SideMenu(BoxLayout):
    base_size_hint_close = (0, 1)
    base_size_hint_open = (0.4, 1)
    bg_color = properties.ListProperty([0, 0, 0, 1])
    # callback will be called with arguments relevant to menu
    callback = properties.ObjectProperty()
    # call do_callback even when menu is cancelled
    callback_on_close = properties.BooleanProperty(False)
    # cancel callback need to remove the widget for UI
    # will be called with the widget to remove as argument
    cancel_cb = properties.ObjectProperty()

    def __init__(self, **kwargs):
        super(SideMenu, self).__init__(**kwargs)
        if self.cancel_cb is None:
            self.cancel_cb = self.onMenuCancelled

    def show(self, caller_wid=None):
        Window.bind(on_keyboard=self.key_input)
        G.host.app.root.add_widget(self)
        Animation(size_hint=self.base_size_hint_open, d=0.3, t='out_back').start(self)

    def hide(self):
        Window.unbind(on_keyboard=self.key_input)
        anim = Animation(size_hint=self.base_size_hint_close, d=0.2)
        anim.bind(on_complete=lambda anim, menu: self.parent.remove_widget(self))
        anim.start(self)
        if self.callback_on_close:
            self.do_callback()

    def on_touch_down(self, touch):
        # we remove the menu if we click outside
        # else we want to handle the event, but not
        # transmit it to parents
        if not self.collide_point(*touch.pos):
            self.hide()
        else:
            return super(SideMenu, self).on_touch_down(touch)
        return True

    def key_input(self, window, key, scancode, codepoint, modifier):
        if key == 27:
            self.hide()
            return True

    def onMenuCancelled(self, wid, cleaning_cb=None):
        self._closeUI(wid)
        if cleaning_cb is not None:
            cleaning_cb()

    def _closeUI(self, wid):
        G.host.closeUI()

    def do_callback(self, *args, **kwargs):
        log.warning(u"callback not implemented")


class TransferMenu(SideMenu):
    """transfer menu which handle display and callbacks"""
    # callback will be called with path to file to transfer
    # profiles if set will be sent to transfer widget, may be used to get specific files
    profiles = properties.ObjectProperty()
    transfer_txt = _(u"Beware! The file will be sent to your server and stay unencrypted there\nServer admin(s) can see the file, and they choose how, when and if it will be deleted")
    send_txt = _(u"The file will be sent unencrypted directly to your contact (without transiting by the server), except in some cases")
    items_layout = properties.ObjectProperty()
    base_size_hint_close = (1, 0)
    base_size_hint_open = (1, 0.5)

    def __init__(self, **kwargs):
        super(TransferMenu, self).__init__(**kwargs)
        if self.profiles is None:
            self.profiles = iter(G.host.profiles)
        for plug_info in G.host.getPluggedWidgets(type_=C.PLUG_TYPE_TRANSFER):
            item = TransferItem(
                plug_info = plug_info
                )
            self.items_layout.add_widget(item)

    def do_callback(self, plug_info):
        self.parent.remove_widget(self)
        if self.callback is None:
            log.warning(u"TransferMenu callback is not set")
        else:
            wid = None
            external = plug_info.get('external', False)
            def onTransferCb(file_path, cleaning_cb=None):
                if not external:
                    self._closeUI(wid)
                self.callback(
                    file_path,
                    cleaning_cb,
                    transfer_type = C.TRANSFER_UPLOAD if self.ids['upload_btn'].state == "down" else C.TRANSFER_SEND)
            wid = plug_info['factory'](plug_info, onTransferCb, self.cancel_cb, self.profiles)
            if not external:
                G.host.showExtraUI(wid)


class EntitiesSelectorMenu(SideMenu, FilterBehavior):
    """allow to select entities from roster"""
    profiles = properties.ObjectProperty()
    layout = properties.ObjectProperty()
    instructions = properties.StringProperty(_(u"Please select entities"))
    filter_input = properties.ObjectProperty()

    def __init__(self, **kwargs):
        super(EntitiesSelectorMenu, self).__init__(**kwargs)
        self.filter_input.bind(text=self.do_filter_input)
        if self.profiles is None:
            self.profiles = iter(G.host.profiles)
        for profile in self.profiles:
            for jid_, jid_data in G.host.contact_lists[profile].all_iter:
                jid_wid = JidToggle(
                    jid=jid_,
                    profile=profile)
                self.layout.add_widget(jid_wid)

    def do_callback(self):
        if self.callback is not None:
            jids = [c.jid for c in self.layout.children if c.state == 'down']
            self.callback(jids)

    def do_filter_input(self, filter_input, text):
        self.layout.spacing = 0 if text else dp(5)
        self.do_filter(self.layout.children,
                       text,
                       lambda c: c.jid,
                       width_cb=lambda c: c.width,
                       height_cb=lambda c: dp(70))