# -*- coding: utf-8 -*-
#
# Copyright (C) 2008 Andrew Resch <andrewresch@gmail.com>
#
# This file is part of Deluge and is licensed under GNU General Public License 3.0, or later, with
# the additional special exception to link portions of this program with the OpenSSL library.
# See LICENSE for more details.
#

from __future__ import division, unicode_literals

import json
import logging
import os.path

import gi  # isort:skip (Required before Gtk import).

gi.require_version('Gtk', '3.0')  # NOQA: E402

# isort:imports-thirdparty
from gi.repository import Gio, Gtk
from gi.repository.Gdk import DragAction, ModifierType, keyval_name
from gi.repository.GObject import TYPE_UINT64

# isort:imports-firstparty
import deluge.component as component
from deluge.common import open_file, show_file
from deluge.ui.client import client
from deluge.ui.common import FILE_PRIORITY

# isort:imports-localfolder
from .common import (
    listview_replace_treestore,
    load_pickled_state_file,
    reparent_iter,
    save_pickled_state_file,
)
from .torrentdetails import Tab
from .torrentview_data_funcs import cell_data_size

log = logging.getLogger(__name__)

CELL_PRIORITY_ICONS = {
    FILE_PRIORITY['Skip']: 'action-unavailable-symbolic',
    FILE_PRIORITY['Low']: 'go-down-symbolic',
    FILE_PRIORITY['Normal']: 'go-next-symbolic',
    FILE_PRIORITY['High']: 'go-up-symbolic',
}

G_ICON_DIRECTORY = Gio.content_type_get_icon('inode/directory')


def cell_priority(column, cell, model, row, data):
    if model.get_value(row, 5) == -1:
        # This is a folder, so lets just set it blank for now
        cell.set_property('text', '')
        return
    priority = model.get_value(row, data)
    cell.set_property('text', _(FILE_PRIORITY[priority]))


def cell_priority_icon(column, cell, model, row, data):
    if model.get_value(row, 5) == -1:
        # This is a folder, so lets just set it blank for now
        cell.set_property('icon-name', None)
        return
    priority = model.get_value(row, data)
    cell.set_property('icon-name', CELL_PRIORITY_ICONS[priority])


def cell_filename(column, cell, model, row, data):
    """Only show the tail portion of the file path"""
    filepath = model.get_value(row, data)
    cell.set_property('text', os.path.split(filepath)[1])


def cell_progress(column, cell, model, row, data):
    text = model.get_value(row, data[0])
    value = model.get_value(row, data[1])
    cell.set_property('visible', True)
    cell.set_property('text', text)
    cell.set_property('value', value)


class FilesTab(Tab):
    def __init__(self):
        super(FilesTab, self).__init__('Files', 'files_tab', 'files_tab_label')

        self.listview = self.main_builder.get_object('files_listview')
        # filename, size, progress string, progress value, priority, file index, icon id
        self.treestore = Gtk.TreeStore(str, TYPE_UINT64, str, float, int, int, Gio.Icon)
        self.treestore.set_sort_column_id(0, Gtk.SortType.ASCENDING)

        # We need to store the row that's being edited to prevent updating it until
        # it's been done editing
        self._editing_index = None

        # Filename column
        self.filename_column_name = _('Filename')
        column = Gtk.TreeViewColumn(self.filename_column_name)
        render = Gtk.CellRendererPixbuf()
        column.pack_start(render, False)
        column.add_attribute(render, 'gicon', 6)
        render = Gtk.CellRendererText()
        render.set_property('editable', True)
        render.connect('edited', self._on_filename_edited)
        render.connect('editing-started', self._on_filename_editing_start)
        render.connect('editing-canceled', self._on_filename_editing_canceled)
        column.pack_start(render, True)
        column.add_attribute(render, 'text', 0)
        column.set_sort_column_id(0)
        column.set_clickable(True)
        column.set_resizable(True)
        column.set_expand(False)
        column.set_min_width(200)
        column.set_reorderable(True)
        self.listview.append_column(column)

        # Size column
        column = Gtk.TreeViewColumn(_('Size'))
        render = Gtk.CellRendererText()
        column.pack_start(render, False)
        column.set_cell_data_func(render, cell_data_size, 1)
        column.set_sort_column_id(1)
        column.set_clickable(True)
        column.set_resizable(True)
        column.set_expand(False)
        column.set_min_width(50)
        column.set_reorderable(True)
        self.listview.append_column(column)

        # Progress column
        column = Gtk.TreeViewColumn(_('Progress'))
        render = Gtk.CellRendererProgress()
        render.set_padding(0, 1)
        column.pack_start(render, True)
        column.set_cell_data_func(render, cell_progress, (2, 3))
        column.set_sort_column_id(3)
        column.set_clickable(True)
        column.set_resizable(True)
        column.set_expand(False)
        column.set_min_width(100)
        column.set_reorderable(True)
        self.listview.append_column(column)

        # Priority column
        column = Gtk.TreeViewColumn(_('Priority'))
        render = Gtk.CellRendererPixbuf()
        column.pack_start(render, False)
        column.set_cell_data_func(render, cell_priority_icon, 4)
        render = Gtk.CellRendererText()
        column.pack_start(render, False)
        column.set_cell_data_func(render, cell_priority, 4)
        column.set_sort_column_id(4)
        column.set_clickable(True)
        column.set_resizable(True)
        column.set_expand(False)
        column.set_min_width(100)
        # Bugfix: Last column needs max_width set to stop scrollbar appearing
        column.set_max_width(200)
        column.set_reorderable(True)
        self.listview.append_column(column)

        self.listview.set_model(self.treestore)

        self.listview.get_selection().set_mode(Gtk.SelectionMode.MULTIPLE)

        self.file_menu = self.main_builder.get_object('menu_file_tab')
        self.file_menu_priority_items = [
            self.main_builder.get_object('menuitem_skip'),
            self.main_builder.get_object('menuitem_low'),
            self.main_builder.get_object('menuitem_normal'),
            self.main_builder.get_object('menuitem_high'),
            self.main_builder.get_object('menuitem_priority_sep'),
        ]

        self.localhost_widgets = [
            self.main_builder.get_object('menuitem_open_file'),
            self.main_builder.get_object('menuitem_show_file'),
            self.main_builder.get_object('menuitem3'),
        ]

        self.listview.connect('row-activated', self._on_row_activated)
        self.listview.connect('key-press-event', self._on_key_press_event)
        self.listview.connect('button-press-event', self._on_button_press_event)

        self.listview.enable_model_drag_source(
            ModifierType.BUTTON1_MASK,
            [('text/plain', 0, 0)],
            DragAction.DEFAULT | DragAction.MOVE,
        )
        self.listview.enable_model_drag_dest([('text/plain', 0, 0)], DragAction.DEFAULT)

        self.listview.connect('drag_data_get', self._on_drag_data_get_data)
        self.listview.connect('drag_data_received', self._on_drag_data_received_data)

        component.get('MainWindow').connect_signals(self)

        # Connect to various events from the daemon
        client.register_event_handler(
            'TorrentFileRenamedEvent', self._on_torrentfilerenamed_event
        )
        client.register_event_handler(
            'TorrentFolderRenamedEvent', self._on_torrentfolderrenamed_event
        )
        client.register_event_handler(
            'TorrentRemovedEvent', self._on_torrentremoved_event
        )

        # Attempt to load state
        self.load_state()

        # torrent_id: (filepath, size)
        self.files_list = {}

        self.torrent_id = None

    def start(self):
        attr = 'hide' if not client.is_localhost() else 'show'
        for widget in self.localhost_widgets:
            getattr(widget, attr)()

    def save_state(self):
        # Get the current sort order of the view
        column_id, sort_order = self.treestore.get_sort_column_id()

        # Setup state dict
        state = {
            'columns': {},
            'sort_id': int(column_id) if column_id >= 0 else None,
            'sort_order': int(sort_order) if sort_order >= 0 else None,
        }

        for index, column in enumerate(self.listview.get_columns()):
            state['columns'][column.get_title()] = {
                'position': index,
                'width': column.get_width(),
            }

        save_pickled_state_file('files_tab.state', state)

    def load_state(self):
        state = load_pickled_state_file('files_tab.state')

        if not state:
            return

        if state['sort_id'] is not None and state['sort_order'] is not None:
            self.treestore.set_sort_column_id(state['sort_id'], state['sort_order'])

        for (index, column) in enumerate(self.listview.get_columns()):
            cname = column.get_title()
            if cname in state['columns']:
                cstate = state['columns'][cname]
                column.set_sizing(Gtk.TreeViewColumnSizing.FIXED)
                column.set_fixed_width(cstate['width'] if cstate['width'] > 0 else 10)
                if state['sort_id'] == index and state['sort_order'] is not None:
                    column.set_sort_indicator(True)
                    column.set_sort_order(state['sort_order'])
                if cstate['position'] != index:
                    # Column is in wrong position
                    if cstate['position'] == 0:
                        self.listview.move_column_after(column, None)
                    elif (
                        self.listview.get_columns()[cstate['position'] - 1].get_title()
                        != cname
                    ):
                        self.listview.move_column_after(
                            column, self.listview.get_columns()[cstate['position'] - 1]
                        )

    def update(self):
        # Get the first selected torrent
        torrent_id = component.get('TorrentView').get_selected_torrents()

        # Only use the first torrent in the list or return if None selected
        if len(torrent_id) != 0:
            torrent_id = torrent_id[0]
        else:
            # No torrent is selected in the torrentview
            self.clear()
            return

        status_keys = ['file_progress', 'file_priorities']
        if torrent_id != self.torrent_id:
            # We only want to do this if the torrent_id has changed
            self.treestore.clear()
            self.torrent_id = torrent_id
            status_keys += ['storage_mode', 'is_seed']

            if self.torrent_id in self.files_list:
                # We already have the files list stored, so just update the view
                self.update_files()

        if (
            self.torrent_id not in self.files_list
            or not self.files_list[self.torrent_id]
        ):
            # We need to get the files list
            log.debug('Getting file list from core..')
            status_keys += ['files']

        component.get('SessionProxy').get_torrent_status(
            self.torrent_id, status_keys
        ).addCallback(self._on_get_torrent_status, self.torrent_id)

    def clear(self):
        self.treestore.clear()
        self.torrent_id = None

    def _on_row_activated(self, tree, path, view_column):
        self.on_menuitem_open_file_activate(None)

    def get_file_path(self, row, path=''):
        if not row:
            return path

        path = self.treestore.get_value(row, 0) + path
        return self.get_file_path(self.treestore.iter_parent(row), path)

    def _on_open_file(self, status):
        paths = self.listview.get_selection().get_selected_rows()[1]
        selected = []
        for path in paths:
            selected.append(self.treestore.get_iter(path))

        for select in selected:
            path = self.get_file_path(select).split('/')
            filepath = os.path.join(status['download_location'], *path)
            log.debug('Open file: %s', filepath)
            timestamp = component.get('MainWindow').get_timestamp()
            open_file(filepath, timestamp=timestamp)

    def _on_show_file(self, status):
        paths = self.listview.get_selection().get_selected_rows()[1]
        selected = []
        for path in paths:
            selected.append(self.treestore.get_iter(path))

        for select in selected:
            path = self.get_file_path(select).split('/')
            filepath = os.path.join(status['download_location'], *path)
            log.debug('Show file: %s', filepath)
            timestamp = component.get('MainWindow').get_timestamp()
            show_file(filepath, timestamp=timestamp)

    # The following 3 methods create the folder/file view in the treeview
    def prepare_file_store(self, torrent_files):
        split_files = {}
        for index, torrent_file in enumerate(torrent_files):
            self.prepare_file(torrent_file, torrent_file['path'], index, split_files)
        self.add_files(None, split_files)

    def prepare_file(self, torrent_file, file_name, file_num, files_storage):
        first_slash_index = file_name.find('/')
        if first_slash_index == -1:
            files_storage[file_name] = (file_num, torrent_file)
        else:
            file_name_chunk = file_name[: first_slash_index + 1]
            if file_name_chunk not in files_storage:
                files_storage[file_name_chunk] = {}
            self.prepare_file(
                torrent_file,
                file_name[first_slash_index + 1 :],
                file_num,
                files_storage[file_name_chunk],
            )

    def add_files(self, parent_iter, split_files):
        chunk_size_total = 0
        for key, value in split_files.items():
            if key.endswith('/'):
                chunk_iter = self.treestore.append(
                    parent_iter, [key, 0, '', 0, 0, -1, G_ICON_DIRECTORY]
                )
                chunk_size = self.add_files(chunk_iter, value)
                self.treestore.set(chunk_iter, 1, chunk_size)
                chunk_size_total += chunk_size
            else:
                mime_type, uncertain = Gio.content_type_guess(key, None)
                if not uncertain and mime_type:
                    mime_icon = Gio.content_type_get_symbolic_icon(mime_type)
                else:
                    mime_icon = Gio.content_type_get_symbolic_icon('text/plain')
                self.treestore.append(
                    parent_iter, [key, value[1]['size'], '', 0, 0, value[0], mime_icon]
                )
                chunk_size_total += value[1]['size']
        return chunk_size_total

    def update_files(self):
        with listview_replace_treestore(self.listview):
            self.prepare_file_store(self.files_list[self.torrent_id])
        root = Gtk.TreePath.new_first()
        self.listview.expand_row(root, False)

    def get_selected_files(self):
        """Returns a list of file indexes that are selected."""

        def get_iter_children(itr, selected):
            i = self.treestore.iter_children(itr)
            while i:
                selected.append(self.treestore[i][5])
                if self.treestore.iter_has_child(i):
                    get_iter_children(i, selected)
                i = self.treestore.iter_next(i)

        selected = []
        paths = self.listview.get_selection().get_selected_rows()[1]
        for path in paths:
            i = self.treestore.get_iter(path)
            selected.append(self.treestore[i][5])
            if self.treestore.iter_has_child(i):
                get_iter_children(i, selected)

        return selected

    def get_files_from_tree(self, rows, files_list, indent):
        if not rows:
            return None

        for row in rows:
            if row[5] > -1:
                files_list.append((row[5], row))
            self.get_files_from_tree(row.iterchildren(), files_list, indent + 1)
        return None

    def update_folder_percentages(self):
        """Go through the tree and update the folder complete percentages."""
        root = self.treestore.get_iter_first()
        if root is None or self.treestore[root][5] != -1:
            return

        def get_completed_bytes(row):
            completed_bytes = 0
            parent = self.treestore.iter_parent(row)
            while row:
                if self.treestore.iter_children(row):
                    completed_bytes += get_completed_bytes(
                        self.treestore.iter_children(row)
                    )
                else:
                    completed_bytes += (
                        self.treestore[row][1] * self.treestore[row][3] / 100
                    )

                row = self.treestore.iter_next(row)

            try:
                value = completed_bytes / self.treestore[parent][1] * 100
            except ZeroDivisionError:
                # Catch the unusal error found when moving folders around
                value = 0
            self.treestore[parent][3] = value
            self.treestore[parent][2] = '%i%%' % value
            return completed_bytes

        get_completed_bytes(self.treestore.iter_children(root))

    def _on_get_torrent_status(self, status, torrent_id):
        # Check stored torrent id matches the callback id
        if self.torrent_id != torrent_id:
            return

        if 'is_seed' in status:
            self.__is_seed = status['is_seed']

        if 'files' in status:
            self.files_list[self.torrent_id] = status['files']
            self.update_files()

        # (index, iter)
        files_list = []
        self.get_files_from_tree(self.treestore, files_list, 0)
        files_list.sort()
        for index, row in files_list:
            # Do not update a row that is being edited
            if self._editing_index == row[5]:
                continue

            try:
                progress_string = '%i%%' % (status['file_progress'][index] * 100)
            except IndexError:
                continue
            if row[2] != progress_string:
                row[2] = progress_string
            progress_value = status['file_progress'][index] * 100
            if row[3] != progress_value:
                row[3] = progress_value
            file_priority = status['file_priorities'][index]
            if row[4] != file_priority:
                row[4] = file_priority
        if self._editing_index != -1:
            # Only update if no folder is being edited
            self.update_folder_percentages()

    def _on_button_press_event(self, widget, event):
        """This is a callback for showing the right-click context menu."""
        log.debug('on_button_press_event')
        # We only care about right-clicks
        if event.button == 3:
            x, y = event.get_coords()
            cursor_path = self.listview.get_path_at_pos(int(x), int(y))
            if not cursor_path:
                return

            paths = self.listview.get_selection().get_selected_rows()[1]
            if cursor_path[0] not in paths:
                row = self.treestore.get_iter(cursor_path[0])
                self.listview.get_selection().unselect_all()
                self.listview.get_selection().select_iter(row)

            for widget in self.file_menu_priority_items:
                widget.set_sensitive(not self.__is_seed)

            self.file_menu.popup(None, None, None, None, event.button, event.time)
            return True

    def _on_key_press_event(self, widget, event):
        keyname = keyval_name(event.keyval)
        if keyname is not None:
            func = getattr(self, 'keypress_' + keyname.lower(), None)
            selected_rows = self.listview.get_selection().get_selected_rows()[1]
            if func and selected_rows:
                return func(event)

    def keypress_menu(self, event):
        self.file_menu.popup(None, None, None, None, 3, event.time)
        return True

    def keypress_f2(self, event):
        path, col = self.listview.get_cursor()
        for column in self.listview.get_columns():
            if column.get_title() == self.filename_column_name:
                self.listview.set_cursor(path, column, True)
                return True

    def on_menuitem_open_file_activate(self, menuitem):
        if client.is_localhost:
            component.get('SessionProxy').get_torrent_status(
                self.torrent_id, ['download_location']
            ).addCallback(self._on_open_file)

    def on_menuitem_show_file_activate(self, menuitem):
        if client.is_localhost:
            component.get('SessionProxy').get_torrent_status(
                self.torrent_id, ['download_location']
            ).addCallback(self._on_show_file)

    def _set_file_priorities_on_user_change(self, selected, priority):
        """Sets the file priorities in the core. It will change the selected with the 'priority'"""
        file_priorities = []

        def set_file_priority(model, path, _iter, data):
            index = model.get_value(_iter, 5)
            if index in selected and index != -1:
                file_priorities.append((index, priority))
            elif index != -1:
                file_priorities.append((index, model.get_value(_iter, 4)))

        self.treestore.foreach(set_file_priority, None)
        file_priorities.sort()
        priorities = [p[1] for p in file_priorities]
        log.debug('priorities: %s', priorities)
        client.core.set_torrent_options(
            [self.torrent_id], {'file_priorities': priorities}
        )

    def on_menuitem_skip_activate(self, menuitem):
        self._set_file_priorities_on_user_change(
            self.get_selected_files(), FILE_PRIORITY['Skip']
        )

    def on_menuitem_low_activate(self, menuitem):
        self._set_file_priorities_on_user_change(
            self.get_selected_files(), FILE_PRIORITY['Low']
        )

    def on_menuitem_normal_activate(self, menuitem):
        self._set_file_priorities_on_user_change(
            self.get_selected_files(), FILE_PRIORITY['Normal']
        )

    def on_menuitem_high_activate(self, menuitem):
        self._set_file_priorities_on_user_change(
            self.get_selected_files(), FILE_PRIORITY['High']
        )

    def on_menuitem_expand_all_activate(self, menuitem):
        self.listview.expand_all()

    def _on_filename_edited(self, renderer, path, new_text):
        index = self.treestore[path][5]
        log.debug('new_text: %s', new_text)

        # Don't do anything if the text hasn't changed
        if new_text == self.treestore[path][0]:
            self._editing_index = None
            return

        if index > -1:
            # We are renaming a file
            itr = self.treestore.get_iter(path)
            # Recurse through the treestore to get the actual path of the file

            def get_filepath(i):
                ip = self.treestore.iter_parent(i)
                fp = ''
                while ip:
                    fp = self.treestore[ip][0] + fp
                    ip = self.treestore.iter_parent(ip)
                return fp

            # Only recurse if file is in a folder..
            if self.treestore.iter_parent(itr):
                filepath = get_filepath(itr) + new_text
            else:
                filepath = new_text

            log.debug('filepath: %s', filepath)

            client.core.rename_files(self.torrent_id, [(index, filepath)])
        else:
            # We are renaming a folder
            folder = self.treestore[path][0]

            parent_path = ''
            itr = self.treestore.iter_parent(self.treestore.get_iter(path))
            while itr:
                parent_path = self.treestore[itr][0] + parent_path
                itr = self.treestore.iter_parent(itr)

            client.core.rename_folder(
                self.torrent_id, parent_path + folder, parent_path + new_text
            )

        self._editing_index = None

    def _on_filename_editing_start(self, renderer, editable, path):
        self._editing_index = self.treestore[path][5]

    def _on_filename_editing_canceled(self, renderer):
        self._editing_index = None

    def _on_torrentfilerenamed_event(self, torrent_id, index, name):
        log.debug('index: %s name: %s', index, name)

        if torrent_id not in self.files_list:
            return

        old_name = self.files_list[torrent_id][index]['path']
        self.files_list[torrent_id][index]['path'] = name

        # We need to update the filename displayed if we're currently viewing
        # this torrents files.
        if torrent_id != self.torrent_id:
            return

        old_name_parent = old_name.split('/')[:-1]
        parent_path = name.split('/')[:-1]

        if old_name_parent != parent_path:
            if parent_path:
                for i, p in enumerate(parent_path):
                    p_itr = self.get_iter_at_path('/'.join(parent_path[: i + 1]) + '/')
                    if not p_itr:
                        p_itr = self.get_iter_at_path('/'.join(parent_path[:i]) + '/')
                        p_itr = self.treestore.append(
                            p_itr,
                            [parent_path[i] + '/', 0, '', 0, 0, -1, G_ICON_DIRECTORY],
                        )
                p_itr = self.get_iter_at_path('/'.join(parent_path) + '/')
                old_name_itr = self.get_iter_at_path(old_name)
                self.treestore.append(
                    p_itr,
                    self.treestore.get(
                        old_name_itr, *range(self.treestore.get_n_columns())
                    ),
                )
                self.treestore.remove(old_name_itr)

                # Remove old parent path
                p_itr = self.get_iter_at_path('/'.join(old_name_parent) + '/')
                self.remove_childless_folders(p_itr)
            else:
                new_folders = name.split('/')[:-1]
                parent_iter = None
                for f in new_folders:
                    parent_iter = self.treestore.append(
                        parent_iter, [f + '/', 0, '', 0, 0, -1, G_ICON_DIRECTORY]
                    )
                child = self.get_iter_at_path(old_name)
                self.treestore.append(
                    parent_iter,
                    self.treestore.get(child, *range(self.treestore.get_n_columns())),
                )
                self.treestore.remove(child)

        else:
            # This is just changing a filename without any folder changes
            def set_file_name(model, path, itr, user_data):
                if model[itr][5] == index:
                    model[itr][0] = os.path.split(name)[-1]
                    return True

            self.treestore.foreach(set_file_name, None)

    def get_iter_at_path(self, filepath):
        """Returns the gtkTreeIter for filepath."""
        log.debug('get_iter_at_path: %s', filepath)
        is_dir = False
        if filepath[-1] == '/':
            is_dir = True

        filepath = filepath.split('/')
        if '' in filepath:
            filepath.remove('')

        path_iter = None
        itr = self.treestore.iter_children(None)
        level = 0
        while itr:
            ipath = self.treestore[itr][0]
            if (level + 1) != len(filepath) and ipath == filepath[level] + '/':
                # We're not at the last index, but we do have a match
                itr = self.treestore.iter_children(itr)
                level += 1
                continue
            elif (level + 1) == len(filepath) and ipath == (
                filepath[level] + '/' if is_dir else filepath[level]
            ):
                # This is the iter we've been searching for
                path_iter = itr
                break
            else:
                itr = self.treestore.iter_next(itr)
                continue
        return path_iter

    def remove_childless_folders(self, itr):
        """Goes up the tree removing childless itrs starting at itr."""
        while not self.treestore.iter_children(itr):
            parent = self.treestore.iter_parent(itr)
            self.treestore.remove(itr)
            itr = parent

    def _on_torrentfolderrenamed_event(self, torrent_id, old_folder, new_folder):
        log.debug('on_torrent_folder_renamed_signal')
        log.debug('old_folder: %s new_folder: %s', old_folder, new_folder)

        if torrent_id not in self.files_list:
            return

        if old_folder[-1] != '/':
            old_folder += '/'

        if len(new_folder) > 0 and new_folder[-1] != '/':
            new_folder += '/'

        for fd in self.files_list[torrent_id]:
            if fd['path'].startswith(old_folder):
                fd['path'] = fd['path'].replace(old_folder, new_folder, 1)

        if torrent_id == self.torrent_id:

            old_split = old_folder.split('/')
            try:
                old_split.remove('')
            except ValueError:
                pass

            new_split = new_folder.split('/')
            try:
                new_split.remove('')
            except ValueError:
                pass

            old_folder_iter = self.get_iter_at_path(old_folder)
            old_folder_iter_parent = self.treestore.iter_parent(old_folder_iter)

            new_folder_iter = self.get_iter_at_path(new_folder) if new_folder else None

            if len(new_split) == len(old_split):
                # These are at the same tree depth, so it's a simple rename
                self.treestore[old_folder_iter][0] = new_split[-1] + '/'
                return
            if new_folder_iter:
                # This means that a folder by this name already exists
                reparent_iter(
                    self.treestore,
                    self.treestore.iter_children(old_folder_iter),
                    new_folder_iter,
                )
            else:
                parent = old_folder_iter_parent
                if new_split:
                    for ns in new_split[:-1]:
                        parent = self.treestore.append(
                            parent, [ns + '/', 0, '', 0, 0, -1, G_ICON_DIRECTORY]
                        )

                    self.treestore[old_folder_iter][0] = new_split[-1] + '/'
                    reparent_iter(self.treestore, old_folder_iter, parent)
                else:
                    child_itr = self.treestore.iter_children(old_folder_iter)
                    reparent_iter(
                        self.treestore,
                        child_itr,
                        old_folder_iter_parent,
                        move_siblings=True,
                    )

            # We need to check if the old_folder_iter no longer has children
            # and if so, we delete it
            self.remove_childless_folders(old_folder_iter)

    def _on_torrentremoved_event(self, torrent_id):
        if torrent_id in self.files_list:
            del self.files_list[torrent_id]

    def _on_drag_data_get_data(self, treeview, context, selection, target_id, etime):
        paths = self.listview.get_selection().get_selected_rows()[1]
        selection.set_text(json.dumps([str(path) for path in paths]), -1)

    def _on_drag_data_received_data(
        self, treeview, context, x, y, selection, info, etime
    ):
        try:
            selected = json.loads(selection.get_data())
        except TypeError:
            log.debug('Invalid selection data: %s', selection.get_data())
            return
        log.debug('selection.data: %s', selected)
        drop_info = treeview.get_dest_row_at_pos(x, y)
        model = treeview.get_model()
        if drop_info:
            itr = model.get_iter(drop_info[0])
            parent_iter = model.iter_parent(itr)
            parent_path = ''
            if model[itr][5] == -1:
                parent_path += model[itr][0]

            while parent_iter:
                parent_path = model[parent_iter][0] + parent_path
                parent_iter = model.iter_parent(parent_iter)

            if model[selected[0]][5] == -1:
                log.debug('parent_path: %s', parent_path)
                log.debug('rename_to: %s', parent_path + model[selected[0]][0])
                # Get the full path of the folder we want to rename
                pp = ''
                itr = self.treestore.iter_parent(self.treestore.get_iter(selected[0]))
                while itr:
                    pp = self.treestore[itr][0] + pp
                    itr = self.treestore.iter_parent(itr)
                client.core.rename_folder(
                    self.torrent_id,
                    pp + model[selected[0]][0],
                    parent_path + model[selected[0]][0],
                )
            else:
                # [(index, filepath), ...]
                to_rename = []
                for s in selected:
                    to_rename.append((model[s][5], parent_path + model[s][0]))
                log.debug('to_rename: %s', to_rename)
                client.core.rename_files(self.torrent_id, to_rename)
