# This file is part of Gajim.
#
# Gajim is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published
# by the Free Software Foundation; version 3 only.
#
# Gajim 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Gajim. If not, see <http://www.gnu.org/licenses/>.

from typing import List  # pylint: disable=unused-import

from gi.repository import Gdk
from gi.repository import GLib
from gi.repository import Gtk

from gajim import vcard
from gajim.common import app
from gajim.common import helpers
from gajim.common.i18n import _
from gajim.common.connection_handlers_events import MessageOutgoingEvent

from gajim.conversation_textview import ConversationTextview

from gajim.gtk.dataform import DataFormWidget
from gajim.gtk.dialogs import ErrorDialog
from gajim.gtk.dialogs import AspellDictError
from gajim.gtk.util import get_builder
from gajim.gtk.util import get_icon_name
from gajim.gtk.util import get_completion_liststore
from gajim.gtk.util import move_window
from gajim.gtk.util import resize_window

if app.is_installed('GSPELL'):
    from gi.repository import Gspell  # pylint: disable=ungrouped-imports


class SingleMessageWindow(Gtk.ApplicationWindow):
    """
    SingleMessageWindow can send or show a received singled message depending on
    action argument which can be 'send' or 'receive'
    """
    def __init__(self, account, to='', action='', from_whom='', subject='',
            message='', resource='', session=None, form_node=None):
        Gtk.ApplicationWindow.__init__(self)
        self.set_application(app.app)
        self.set_title(_('Send Single Message'))
        self.set_name('SendSingleMessageWindow')
        self.account = account
        self.action = action

        self.subject = subject
        self.message = message
        self.to = to
        self.from_whom = from_whom
        self.resource = resource
        self.session = session

        self._ui = get_builder('single_message_window.ui')
        self.message_tv_buffer = self._ui.message_textview.get_buffer()
        self.conversation_textview = ConversationTextview(
            account, used_in_history_window=True)
        self.conversation_textview.tv.show()
        self.conversation_textview.tv.set_left_margin(6)
        self.conversation_textview.tv.set_right_margin(6)
        self.conversation_textview.tv.set_top_margin(6)
        self.conversation_textview.tv.set_bottom_margin(6)
        self.conversation_tv_buffer = self.conversation_textview.tv.get_buffer()
        self._ui.conversation_scrolledwindow.add(
            self.conversation_textview.tv)

        self.form_widget = None
        parent_box = self._ui.conversation_scrolledwindow.get_parent()
        if form_node:
            self.form_widget = DataFormWidget(form_node)
            self.form_widget.show_all()
            self._ui.conversation_scrolledwindow.hide()
            self._ui.message_label_received.hide()
            parent_box.add(self.form_widget)
            parent_box.child_set_property(self.form_widget, 'top-attach', 2)
            parent_box.child_set_property(self.form_widget, 'left-attach', 0)
            parent_box.child_set_property(self.form_widget, 'width', 2)
            self.action = 'form'

        self.message_tv_buffer.connect('changed', self.update_char_counter)
        if isinstance(to, list):
            jid = ', '.join([i[0].get_full_jid() for i in to])
            self._ui.to_entry.set_text(jid)
        else:
            self._ui.to_entry.set_text(to)

        if app.config.get('use_speller') and app.is_installed('GSPELL') and action == 'send':
            lang = app.config.get('speller_language')
            gspell_lang = Gspell.language_lookup(lang)
            if gspell_lang is None:
                AspellDictError(lang)
            else:
                spell_buffer = Gspell.TextBuffer.get_from_gtk_text_buffer(
                    self._ui.message_textview.get_buffer())
                spell_buffer.set_spell_checker(Gspell.Checker.new(gspell_lang))
                spell_view = Gspell.TextView.get_from_gtk_text_view(
                    self._ui.message_textview)
                spell_view.set_inline_spell_checking(True)
                spell_view.set_enable_language_menu(True)

        self.prepare_widgets_for(self.action)

        # set_text(None) raises TypeError exception
        if self.subject is None:
            self.subject = _('(No subject)')
        self._ui.subject_entry.set_text(self.subject)
        self._ui.subject_from_entry_label.set_text(self.subject)

        if to == '':
            liststore = get_completion_liststore(self._ui.to_entry)
            self.completion_dict = helpers.get_contact_dict_for_account(account)
            keys = sorted(self.completion_dict.keys())
            for jid in keys:
                contact = self.completion_dict[jid]
                status_icon = get_icon_name(contact.show)
                liststore.append((status_icon, jid))
        else:
            self.completion_dict = {}

        self._ui.to_entry.connect('changed', self.on_to_entry_changed)
        self._ui.connect_signals(self)

        # get window position and size from config
        resize_window(self._ui.single_message_window,
            app.config.get('single-msg-width'),
            app.config.get('single-msg-height'))
        move_window(self._ui.single_message_window,
            app.config.get('single-msg-x-position'),
            app.config.get('single-msg-y-position'))

        self._ui.single_message_window.show_all()

    def on_single_message_window_destroy(self, widget):
        c = app.contacts.get_contact_with_highest_priority(self.account,
                self.from_whom)
        if not c:
            # Groupchat is maybe already destroyed
            return
        if c.is_groupchat() and self.from_whom not in \
        app.interface.minimized_controls[self.account] and self.action == \
        'receive' and app.events.get_nb_roster_events(self.account,
        self.from_whom, types=['chat', 'normal']) == 0:
            app.interface.roster.remove_groupchat(self.from_whom, self.account)

    def set_cursor_to_end(self):
        end_iter = self.message_tv_buffer.get_end_iter()
        self.message_tv_buffer.place_cursor(end_iter)

    def save_pos(self):
        # save the window size and position
        x, y = self._ui.single_message_window.get_position()
        app.config.set('single-msg-x-position', x)
        app.config.set('single-msg-y-position', y)
        width, height = self._ui.single_message_window.get_size()
        app.config.set('single-msg-width', width)
        app.config.set('single-msg-height', height)

    def on_single_message_window_delete_event(self, window, ev):
        self.save_pos()

    def on_show_contact_info_button_clicked(self, widget):
        """
        Ask for vCard
        """
        entry = self._ui.to_entry.get_text().strip()

        keys = sorted(self.completion_dict.keys())
        for key in keys:
            contact = self.completion_dict[key]
            if entry in key:
                entry = contact.jid
                break

        if entry in app.interface.instances[self.account]['infos']:
            app.interface.instances[self.account]['infos'][entry].window.present()
        else:
            contact = app.contacts.create_contact(jid=entry, account=self.account)
            app.interface.instances[self.account]['infos'][entry] = \
                     vcard.VcardWindow(contact, self.account)
            # Remove xmpp page
            app.interface.instances[self.account]['infos'][entry].xml.\
                     get_object('information_notebook').remove_page(0)

    def on_to_entry_changed(self, widget):
        entry = self._ui.to_entry.get_text()
        is_empty = bool(not entry == '' and not ',' in entry)
        self._ui.show_contact_info_button.set_sensitive(is_empty)

    def prepare_widgets_for(self, action):
        if len(app.connections) > 1:
            if action == 'send':
                title = _('Single Message using account %s') % self.account
            else:
                title = _('Single Message in account %s') % self.account
        else:
            title = _('Single Message')

        if action == 'send': # prepare UI for Sending
            title = _('Send %s') % title
            self._ui.send_button.show()
            self._ui.send_and_close_button.show()
            self._ui.reply_button.hide()
            self._ui.close_button.hide()

            self._ui.send_grid.show()
            self._ui.received_grid.hide()

            if self.message: # we come from a reply?
                self._ui.show_contact_info_button.set_sensitive(True)
                self._ui.message_textview.grab_focus()
                self.message_tv_buffer.set_text(self.message)
                GLib.idle_add(self.set_cursor_to_end)
            else: # we write a new message (not from reply)
                if self.to: # do we already have jid?
                    self._ui.subject_entry.grab_focus()

        elif action == 'receive': # prepare UI for Receiving
            title = _('Received %s') % title
            self._ui.reply_button.show()
            self._ui.close_button.show()
            self._ui.send_button.hide()
            self._ui.send_and_close_button.hide()
            self._ui.reply_button.grab_focus()

            self._ui.received_grid.show()
            self._ui.send_grid.hide()

            if self.message:
                self.conversation_textview.print_real_text(self.message)
            fjid = self.from_whom
            if self.resource:
                fjid += '/' + self.resource # Full jid of sender (with resource)
            self._ui.from_entry_label.set_text(fjid)

        elif action == 'form': # prepare UI for Receiving
            title = self.form_widget.title
            title = _('Form: %s') % title
            self._ui.send_button.hide()
            self._ui.send_and_close_button.hide()
            self._ui.reply_button.show()
            self._ui.close_button.show()

            self._ui.send_grid.hide()
            self._ui.received_grid.show()

            fjid = self.from_whom
            if self.resource:
                fjid += '/' + self.resource # Full jid of sender (with resource)
            self._ui.from_entry_label.set_text(fjid)

        self._ui.single_message_window.set_title(title)

    def on_close_button_clicked(self, widget):
        self.save_pos()
        self._ui.single_message_window.destroy()

    def update_char_counter(self, widget):
        characters_no = self.message_tv_buffer.get_char_count()
        self._ui.count_chars_label.set_text(
            _('Characters typed: %s') % str(characters_no))

    def send_single_message(self):
        if app.connections[self.account].connected <= 1:
            # if offline or connecting
            ErrorDialog(_('Connection not available'),
                _('Please make sure you are connected with "%s".') % self.account)
            return True
        if isinstance(self.to, list):
            sender_list = []
            for i in self.to:
                if i[0].resource:
                    sender_list.append(i[0].jid + '/' + i[0].resource)
                else:
                    sender_list.append(i[0].jid)
        else:
            sender_list = [j.strip() for j in self._ui.to_entry.get_text().split(
                ',')]

        subject = self._ui.subject_entry.get_text()
        begin, end = self.message_tv_buffer.get_bounds()
        message = self.message_tv_buffer.get_text(begin, end, True)

        if self.form_widget:
            form_node = self.form_widget.get_submit_form()
        else:
            form_node = None

        recipient_list = []

        for to_whom_jid in sender_list:
            if to_whom_jid in self.completion_dict:
                to_whom_jid = self.completion_dict[to_whom_jid].jid
            try:
                to_whom_jid = helpers.parse_jid(to_whom_jid)
            except helpers.InvalidFormat:
                ErrorDialog(_('Invalid JID'),
                    _('It is not possible to send a message to %s, this JID '
                      'is not valid.') % to_whom_jid)
                return True

            if '/announce/' in to_whom_jid:
                con = app.connections[self.account]
                con.get_module('Announce').set_announce(
                    to_whom_jid, subject, message)
                continue

            recipient_list.append(to_whom_jid)

        app.nec.push_outgoing_event(MessageOutgoingEvent(None,
            account=self.account, jid=recipient_list, message=message,
            type_='normal', subject=subject, form_node=form_node))

        self._ui.subject_entry.set_text('') # we sent ok, clear the subject
        self.message_tv_buffer.set_text('') # we sent ok, clear the textview

    def on_send_button_clicked(self, widget):
        self.send_single_message()

    def on_reply_button_clicked(self, widget):
        # we create a new blank window to send and we preset RE: and to jid
        self.subject = _('RE: %s') % self.subject
        self.message = _('%s wrote:\n') % self.from_whom + self.message
        # add > at the begining of each line
        self.message = self.message.replace('\n', '\n> ') + '\n\n'
        self._ui.single_message_window.destroy()
        SingleMessageWindow(self.account, to=self.from_whom, action='send',
            from_whom=self.from_whom, subject=self.subject, message=self.message,
            session=self.session)

    def on_send_and_close_button_clicked(self, widget):
        if self.send_single_message():
            return
        self.save_pos()
        self._ui.single_message_window.destroy()

    def on_single_message_window_key_press_event(self, widget, event):
        if event.keyval == Gdk.KEY_Escape: # ESCAPE
            self.save_pos()
            self._ui.single_message_window.destroy()