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

import gtk
import pygtk
import pango
import random
import copy
from sugar.graphics import style

from settings import Settings
from coach import Coach

from exercises import *
from exercises.exercise import Exercise


class Collection:

    def __init__(self, display, coach):
        self._sett = Settings()
        #WN.LV diese Daten via pickle.load(...) holen ############
        self._data = [(self._sett.get_setting('addsub_simp'), []),
                      (self._sett.get_setting('passten'),     []),
                      (self._sett.get_setting('times_div'),   [])]
        #WN.LV [] ist die vorlaeufige Liste der errors ###########
        self._display = display
        self._coach = coach
        self._active_exerc = None

    def select(self, key):
        """ Select an exercise by key. return instance of an exercise.
        Errors are retrieved for (future) use by Coach. """
        #WN.LV Code ersetzen: key ist dann fuer Listen von Listen !!
        (_sett, _errors) = self._data[key]
        exercise_label = _sett['topic']

        if not Exercise.EXERCISES.has_key(exercise_label):
            raise Exception('Collection#select: Wrong key. To register an exercise see exercises/__init__.py')
    
        klass = Exercise.EXERCISES[exercise_label]
        package = __import__("exercises." + klass)
        module = getattr(package, klass)
        return getattr(module, klass)(self._display, (_sett, _errors))    


    def define_coll_gui(self):
        """ Define gui-elements for presenting the collection.
        TODO: define once at startup of RP ?"""
        #WN.LV diesen Code ersetzen: collection_table.attach(self.colldata,...
        self.topic_box = gtk.HBox(True, 0)
        #self._display.collection_table.attach(self.topic_box, 0, 6, 0, 1)
        self._display.collection_table.attach(self.topic_box, 0, 9, 5, 6)

    def set_coll_gui(self, coll_data):
        """ Set gui-elements according to Collection.data. """
        #WN.LV diesen Code ersetzen !!!!!
        _i = 0
        for _t in ['addsub_simp','passten','times_div']:
            self.button = gtk.Button()
            self.image = gtk.Image()
            
            if(_t == 'addsub_simp'):
                self.image.set_from_file("img/addsub_simp.jpg")
            elif(_t == 'passten'):
                self.image.set_from_file("img/passten.jpg")
            elif(_t == 'times_div'):
                self.image.set_from_file("img/times_div.jpg")

            self.button.set_image(self.image)
            self.button.connect("clicked", self.select_exerc_callback, _i)
            self.topic_box.pack_start(self.button)
            self.button.show()
            _i = _i + 1
        self.topic_box.show()
         
    def select_exerc_callback(self, widget, coll_key):
        """ Callback telling the item from the collection selected. """
        #WN.LV diesen Code ersetzen> statt 1..n fuer Listen kommt coll_key
        print('in Collection.select_exerc_callback')
        if(self._active_exerc == None):
            # at startup
            self._active_exerc = coll_key
            self._display.set_select_exerc_semaphore(coll_key)
            #self._coach.notify(('exerc-selected', coll_key))
        elif(self._active_exerc == coll_key):
            # hit the same button once more
            pass
        elif(self._active_exerc != coll_key):
            # switched to another exercise
            self._active_exerc = coll_key
            self._display.switch_exercise() # TODO rename
            self._display.set_select_exerc_semaphore(coll_key)
            #self._coach.notify(('exerc-selected', coll_key))