# -*- coding:utf-8 -*-
## src/advanced.py
##
## Copyright (C) 2005 Travis Shirk <travis AT pobox.com>
##                    Vincent Hanquez <tab AT snarc.org>
## Copyright (C) 2005-2012 Yann Leboulanger <asterix AT lagaule.org>
## Copyright (C) 2005-2007 Nikos Kouremenos <kourem AT gmail.com>
## Copyright (C) 2006 Dimitur Kirov <dkirov AT gmail.com>
## Copyright (C) 2006-2007 Jean-Marie Traissard <jim AT lapin.org>
##
## 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/>.
##

import gtk
import gtkgui_helpers
import gobject

from common import gajim

(
OPT_TYPE,
OPT_VAL
) = range(2)

(
C_PREFNAME,
C_VALUE,
C_TYPE
) = range(3)

GTKGUI_GLADE = 'manage_accounts_window.ui'

def rate_limit(rate):
    """
    Call func at most *rate* times per second
    """
    def decorator(func):
        timeout = [None]
        def f(*args, **kwargs):
            if timeout[0] is not None:
                gobject.source_remove(timeout[0])
                timeout[0] = None
            def timeout_func():
                func(*args, **kwargs)
                timeout[0] = None
            timeout[0] = gobject.timeout_add(int(1000.0 / rate), timeout_func)
        return f
    return decorator

def tree_model_iter_children(model, treeiter):
    it = model.iter_children(treeiter)
    while it:
        yield it
        it = model.iter_next(it)

def tree_model_pre_order(model, treeiter):
    yield treeiter
    for childiter in tree_model_iter_children(model, treeiter):
        for it in tree_model_pre_order(model, childiter):
            yield it


class AdvancedConfigurationWindow(object):
    def __init__(self):
        self.xml = gtkgui_helpers.get_gtk_builder('advanced_configuration_window.ui')
        self.window = self.xml.get_object('advanced_configuration_window')
        self.window.set_transient_for(
                gajim.interface.instances['preferences'].window)
        self.entry = self.xml.get_object('advanced_entry')
        self.desc_label = self.xml.get_object('advanced_desc_label')
        self.restart_label = self.xml.get_object('restart_label')

        # Format:
        # key = option name (root/subopt/opt separated by \n then)
        # value = array(oldval, newval)
        self.changed_opts = {}

        # For i18n
        self.right_true_dict = {True: _('Activated'), False: _('Deactivated')}
        self.types = {
                'boolean': _('Boolean'),
                'integer': _('Integer'),
                'string': _('Text'),
                'color': _('Color')}

        treeview = self.xml.get_object('advanced_treeview')
        self.treeview = treeview
        self.model = gtk.TreeStore(str, str, str)
        self.fill_model()
        self.model.set_sort_column_id(0, gtk.SORT_ASCENDING)
        self.modelfilter = self.model.filter_new()
        self.modelfilter.set_visible_func(self.visible_func)

        renderer_text = gtk.CellRendererText()
        col = treeview.insert_column_with_attributes(-1, _('Preference Name'),
                renderer_text, text = 0)
        col.set_resizable(True)

        renderer_text = gtk.CellRendererText()
        renderer_text.connect('edited', self.on_config_edited)
        col = treeview.insert_column_with_attributes(-1, _('Value'),
                renderer_text, text = 1)
        col.set_cell_data_func(renderer_text, self.cb_value_column_data)

        col.props.resizable = True
        col.set_max_width(250)

        renderer_text = gtk.CellRendererText()
        treeview.insert_column_with_attributes(-1, _('Type'),
                renderer_text, text = 2)

        treeview.set_model(self.modelfilter)

        # connect signal for selection change
        treeview.get_selection().connect('changed',
                self.on_advanced_treeview_selection_changed)

        self.xml.connect_signals(self)
        self.window.show_all()
        self.restart_label.hide()
        gajim.interface.instances['advanced_config'] = self

    def cb_value_column_data(self, col, cell, model, iter_):
        """
        Check if it's boolen or holds password stuff and if yes  make the
        cellrenderertext not editable, else - it's editable
        """
        optname = model[iter_][C_PREFNAME]
        opttype = model[iter_][C_TYPE]
        if opttype == self.types['boolean'] or optname == 'password':
            cell.set_property('editable', False)
        else:
            cell.set_property('editable', True)

    def get_option_path(self, model, iter_):
        # It looks like path made from reversed array
        # path[0] is the true one optname
        # path[1] is the key name
        # path[2] is the root of tree
        # last two is optional
        path = [model[iter_][0].decode('utf-8')]
        parent = model.iter_parent(iter_)
        while parent:
            path.append(model[parent][0].decode('utf-8'))
            parent = model.iter_parent(parent)
        return path

    def on_advanced_treeview_selection_changed(self, treeselection):
        model, iter_ = treeselection.get_selected()
        # Check for GtkTreeIter
        if iter_:
            opt_path = self.get_option_path(model, iter_)
            # Get text from first column in this row
            desc = None
            if len(opt_path) == 3:
                desc = gajim.config.get_desc_per(opt_path[2], opt_path[1],
                        opt_path[0])
            elif len(opt_path) == 1:
                desc = gajim.config.get_desc(opt_path[0])
            if desc:
                self.desc_label.set_text(desc)
            else:
                #we talk about option description in advanced configuration editor
                self.desc_label.set_text(_('(None)'))

    def remember_option(self, option, oldval, newval):
        if option in self.changed_opts:
            self.changed_opts[option] = (self.changed_opts[option][0], newval)
        else:
            self.changed_opts[option] = (oldval, newval)

    def on_advanced_treeview_row_activated(self, treeview, path, column):
        modelpath = self.modelfilter.convert_path_to_child_path(path)
        modelrow = self.model[modelpath]
        option = modelrow[0].decode('utf-8')
        if modelrow[2] == self.types['boolean']:
            for key in self.right_true_dict.keys():
                if self.right_true_dict[key] == modelrow[1]:
                    modelrow[1] = key
            newval = {'False': True, 'True': False}[modelrow[1]]
            if len(modelpath) > 1:
                optnamerow = self.model[modelpath[0]]
                optname = optnamerow[0].decode('utf-8')
                keyrow = self.model[modelpath[:2]]
                key = keyrow[0].decode('utf-8')
                gajim.config.get_desc_per(optname, key, option)
                self.remember_option(option + '\n' + key + '\n' + optname,
                        modelrow[1], newval)
                gajim.config.set_per(optname, key, option, newval)
            else:
                self.remember_option(option, modelrow[1], newval)
                gajim.config.set(option, newval)
            gajim.interface.save_config()
            modelrow[1] = self.right_true_dict[newval]
            self.check_for_restart()

    def check_for_restart(self):
        self.restart_label.hide()
        for opt in self.changed_opts:
            opt_path = opt.split('\n')
            if len(opt_path)==3:
                restart = gajim.config.get_restart_per(opt_path[2], opt_path[1],
                        opt_path[0])
            else:
                restart = gajim.config.get_restart(opt_path[0])
            if restart:
                if self.changed_opts[opt][0] != self.changed_opts[opt][1]:
                    self.restart_label.show()
                    break

    def on_config_edited(self, cell, path, text):
        # convert modelfilter path to model path
        modelpath = self.modelfilter.convert_path_to_child_path(path)
        modelrow = self.model[modelpath]
        option = modelrow[0].decode('utf-8')
        text = text.decode('utf-8')
        if len(modelpath) > 1:
            optnamerow = self.model[modelpath[0]]
            optname = optnamerow[0].decode('utf-8')
            keyrow = self.model[modelpath[:2]]
            key = keyrow[0].decode('utf-8')
            self.remember_option(option + '\n' + key + '\n' + optname, modelrow[1],
                    text)
            gajim.config.set_per(optname, key, option, text)
        else:
            self.remember_option(option, modelrow[1], text)
            gajim.config.set(option, text)
        gajim.interface.save_config()
        modelrow[1] = text
        self.check_for_restart()

    def on_advanced_configuration_window_destroy(self, widget):
        del gajim.interface.instances['advanced_config']

    def on_advanced_close_button_clicked(self, widget):
        self.window.destroy()

    def fill_model(self, node=None, parent=None):
        for item, option in gajim.config.get_children(node):
            name = item[-1]
            if option is None: # Node
                newparent = self.model.append(parent, [name, '', ''])
                self.fill_model(item, newparent)
            else: # Leaf
                type_ = self.types[option[OPT_TYPE][0]]
                if name == 'password':
                    value = _('Hidden')
                else:
                    if type_ == self.types['boolean']:
                        value = self.right_true_dict[option[OPT_VAL]]
                    else:
                        value = option[OPT_VAL]
                self.model.append(parent, [name, value, type_])

    def visible_func(self, model, treeiter):
        search_string  = self.entry.get_text().decode('utf-8').lower()
        for it in tree_model_pre_order(model, treeiter):
            if model[it][C_TYPE] != '':
                opt_path = self.get_option_path(model, it)
                if len(opt_path) == 3:
                    desc = gajim.config.get_desc_per(opt_path[2], opt_path[1],
                            opt_path[0])
                elif len(opt_path) == 1:
                    desc = gajim.config.get_desc(opt_path[0])
                if search_string in model[it][C_PREFNAME] or (desc and \
                search_string in desc.lower()):
                    return True
        return False

    @rate_limit(3)
    def on_advanced_entry_changed(self, widget):
        self.modelfilter.refilter()
        if not widget.get_text():
            # Maybe the expanded rows should be remembered here ...
            self.treeview.collapse_all()
        else:
            # ... and be restored correctly here
            self.treeview.expand_all()
