# -*- coding: utf-8 -*-

#   This file is part of emesene.
#
#    Emesene 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; either version 2 of the License, or
#    (at your option) any later version.
#
#    emesene 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 emesene; if not, write to the Free Software
#    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

'''module that implements abstract.ConfigDialog using Gtk'''

import gtk

from abstract.ConfigDialog import *
import dialog

BUILDERS = {}

def build_generic(element):
    '''build and return the element'''
    if type(element) in BUILDERS:
        return BUILDERS[type(element)](element)
    else:
        raise ValueError("unknown type of element")

def _text_cb(widget, element):
    '''method called when the value of the widget is changed, set the value
    of the text to the element'''
    element.value = widget.get_text()

def _checkbox_cb(widget, element):
    '''method called when the element is toggled, change the value of the 
    element'''
    element.value = widget.get_active()

def _radio_cb(widget, element):
    '''method called when a radio element is toggled, change the selected
    value to the identifier of that radio'''
    if not widget.get_active():
        return

    index = list(element.labels).index(widget.get_label())
    element.value = element.identifiers[index]

def build_text(element, spacing=2, border=2, visibility=True):
    '''build a Text object'''
    hbox = gtk.HBox(spacing=spacing)
    hbox.set_border_width(border)
    label = gtk.Label(element.label)
    entry = gtk.Entry()
    entry.set_text(element.value)
    entry.set_visibility(visibility)
    entry.connect("changed", _text_cb, element)

    hbox.pack_start(label, True, True)
    hbox.pack_start(entry, True, True)

    return hbox

def build_password(element, spacing=2, border=2):
    '''build a Text object'''
    return build_text(element, spacing, border, False) 

def build_checkbox(element):
    '''build a checkbox'''
    checkbox = gtk.CheckButton(element.label)
    checkbox.set_active(element.value)
    checkbox.connect("toggled", _checkbox_cb, element)

    return checkbox

def build_radiogroup(element, spacing=2, border=2):
    '''build a radio group'''
    first_radio = gtk.RadioButton(None, element.labels[0])
    first_radio.connect("toggled", _radio_cb, element)
    vbox = gtk.VBox(spacing=spacing)
    vbox.set_border_width(border)
    vbox.pack_start(first_radio, True, True)

    if element.selected_index == 0:
        first_radio.set_selected(True)

    for (index, label) in enumerate(element.labels[1:]):
        radio = gtk.RadioButton(first_radio, label)
        radio.connect("toggled", _radio_cb, element)

        if index + 1 == element.selected_index:
            radio.set_active(True)

        vbox.pack_start(radio, True, True)

    return vbox

def build_group(element, spacing=2, border=2):
    '''build a group'''
    vbox = gtk.VBox(spacing=spacing)
    vbox.set_border_width(border)

    for elem in element.items:
        vbox.pack_start(build_generic(elem))

    if element.label:
        frame = gtk.Frame(element.label)
        frame.add(vbox)
        return frame
    else:
        return vbox

def build_tab(element, spacing=2, border=2):
    '''build a tab'''
    vbox = gtk.VBox(spacing=spacing)
    vbox.set_border_width(border)

    for elem in element.items:
        vbox.pack_start(build_generic(elem))

    return vbox

def build_tabgroup(element, spacing=2, border=2):
    '''build a tabgroup'''
    notebook = gtk.Notebook()

    for tab in element.items:
        notebook.append_page(build_generic(tab), gtk.Label(tab.label))

    return notebook

def _ok_clicked_cb(button, window, element):
    '''called when the ok button is clicked'''
    if _on_close(element):
        window.hide()

def _close_cb(window, event, element):
    '''called when the dialog is closed, element is the root container
    will call to on_last_change to inform that is the last change'''
    if _on_close(element):
        window.hide()

    return True # stop the window from being destroyed (you can reuse the 
    # window if you mantain a reference to it)

def _on_close(element):
    '''calidate the fields and display a dialog if something is not 
    valid and return False, if all validated, return True'''
    (validated, message, element) = element.validate()

    if not validated:
        tmp = {
            'identifier': element.identifier,
            'value': element.value,
            'message': message,
        }
        dialog.error(_("Field '%(identifier)s ('%(value)s') not valid\n" \
            "'%(message)s'" % tmp))
        return False
    else:
        element.on_last_change()
        return True

def build(element, spacing=2, border=2):
    '''build a window and return it'''

    window = gtk.Window()
    vbox = gtk.VBox(spacing=spacing)
    vbox.set_border_width(border)

    button_box = gtk.HButtonBox()
    button_box.set_layout(gtk.BUTTONBOX_END)
    ok_button = gtk.Button(stock=gtk.STOCK_OK)
    ok_button.connect("clicked", _ok_clicked_cb, window, element)
    button_box.pack_start(ok_button)

    vbox.pack_start(build_generic(element), True, True)
    vbox.pack_start(button_box, False)

    window.add(vbox)
    vbox.show_all()
    window.connect("delete-event", _close_cb, element)

    return window

BUILDERS[Text] = build_text
BUILDERS[Password] = build_password
BUILDERS[CheckBox] = build_checkbox
BUILDERS[RadioGroup] = build_radiogroup
BUILDERS[Group] = build_group
BUILDERS[Tab] = build_tab
BUILDERS[TabGroup] = build_tabgroup