# coding: UTF8
# Copyright 2009 Thomas Jourdan
#
# This program 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 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

import traceback
import sys
import ka_debug
from gettext import gettext as _

class GettingstartedController(object):
    """
    inv: self._widget_tree is not None
    inv: self._controller is not None
    """
    
    _getting_started_text = """Kandid is a system to evolve graphical forms and color combinations. In subsequent generations Kandid creates random images. These images are proposals. You must rank the automatically generated images.

Kandid uses a simulated evolution without a fitness function. A cybernetic system has no aesthetic feeling. Your select favorite images to give them a higher chance to reproduce. Over some generation you can  find 'cool' looking images.
    """

    def __init__(self, controller, init_widget_tree):
        """
        pre: init_widget_tree is not None
        """
        self._controller = controller
        self._widget_tree = init_widget_tree

    def autoconnect_events(self):
        """Auto connect status view."""
        #Create a dictionary to connect events
        events = {
                'on_readintro' : self.on_readintro,
                'on_startnew' : self.on_startnew,
                 }
        self._widget_tree.signal_autoconnect(events)

    def localize(self):
        try:
            local = {'startLabel' : _('Getting started'),
                     'readintroLinkbutton' : _('Read the Introduction'),
                     'startnewLinkbutton' : _('Show image population'),
                     }
            for key, label in local.iteritems():
                self._widget_tree.get_widget(key).set_label(label)
                
            textview = self._widget_tree.get_widget('gettingstarted_textview')
            buf = textview.get_buffer()
            translated = _('getting_started')
            translated = translated if not translated == 'getting_started' \
                            else GettingstartedController._getting_started_text
            buf.delete(buf.get_start_iter(), buf.get_end_iter())
            buf.insert(buf.get_end_iter(), translated)
        except:
            ka_debug.err('localizing page "getting started" failed [%s] [%s]' % \
                       (sys.exc_info()[0], sys.exc_info()[1]))
            traceback.print_exc(file=sys.__stderr__)

    def show(self):
        """A dummy"""
        pass

    def on_readintro(self, args):
        """Show introduction page.
        """
        self._controller.on_page_show(2) #Assume into page has position 2.

    def on_startnew(self, args):
        """Show population page.
        """
        self._controller.on_page_show(0) #Assume population page has position 0.