import sys, os
import gtk
from Workshop import WorkshopListItem
from Rating import Rating
import operator
import logging


class TutorialStoreResults(gtk.VBox):
    def __init__(self,controller):
        """Constructor
        
        @param controller The controller to attach the view to
        """
        gtk.VBox.__init__(self,False,10)
        
        back_image = gtk.Image()
        back_image.set_from_file('arrow_back.png')
        self.back_button = gtk.Button("Prev")
        self.back_button.set_image(back_image)
        
        next_image = gtk.Image()
        next_image.set_from_file('arrow_next.png')
        self.next_button = gtk.Button("Next")
        self.next_button.set_image(next_image)
        
        self.arrow_box = gtk.HBox()
        self.arrow_box.pack_start(self.back_button,False,False)
        self.arrow_box.pack_end(self.next_button,False,False)
        self.back_button.set_sensitive(False)

        self.controller = controller
        self.tutorial_list = []
        
        #by default tutorials are sorted by name
        self.sorting_key = 'Name'

        self.set_border_width(10)
        
        #create the list item container with a scroll bar if necessary
        self.main_container = gtk.ScrolledWindow()
        self.main_container.set_policy(gtk.POLICY_AUTOMATIC,gtk.POLICY_AUTOMATIC)

        self.list_container= gtk.VBox()

        self.main_container.add_with_viewport(self.list_container)
        self.pack_start(self.main_container)
        self.pack_end(self.arrow_box,False,False)
        
        self.back_button.connect("clicked",self.controller.prev_page,None)
        self.next_button.connect("clicked",self.controller.next_page,None)

        #Show the components
        self.list_container.show()
        self.main_container.show()
        self.arrow_box.show_all()
        
    def set_button_sensitive(self,back,next):
        self.back_button.set_sensitive(back)
        self.next_button.set_sensitive(next)

    def change_sorting(self,sorting):
        """
        Changes the property by which tutorial are sorted
        
        @param sorting The property by which tutorials will be sorted
        """
        logging.info("Change_sorting was called")
        self.sorting_key = sorting
        self.sort_tutorial()
    
    def sort_tutorial(self):
        """
        Sorts the tutorials
        """
        #if tutorials are sorted by rating they are in the reverse order
        self.tutorial_list.sort(key=operator.attrgetter(self.sorting_key.lower()))
        self.refresh_tutorial_display()
        
    def set_tutorial_list(self,tutorial_list):
        """
        Set the list of tutorial to display
        
        @param tutorial_list the tutorial list
        """
        self.tutorial_list = tutorial_list
        self.sort_tutorial()
        
    def refresh_tutorial_display(self):
        """
        Refresh the tutorial content by deleting every item and recreating them
        """
        #delete every tutorial list item
        for child in self.list_container.get_children():
            self.list_container.remove(child)
            
        #Creates and add a new item for every tutorial
        for tuto in self.tutorial_list:
            item = TutorialStoreListItem(tuto,self.controller)
            self.list_container.pack_start(item)
            item.show()
            if self.tutorial_list[-1] != tuto:
                sep = gtk.HSeparator()
                self.list_container.pack_start(sep)
                sep.show()
            
class TutorialStoreListItem(WorkshopListItem):
    def __init__(self,tutorial,controller):
        WorkshopListItem.__init__(self,tutorial,controller)

        self.last_row = gtk.HBox(False,15)
        self.btn_detail = gtk.Button('Details')
        self.last_row.pack_end(self.btn_detail,False,False)

        self.table.attach(self.last_row,1,3,2,3,yoptions = 0)

        self.last_row.show_all()
        
        #connect the buttons
        self.btn_detail.connect("clicked",self.controller.show_details,self.tutorial)