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

# Copyright (c) 2012 - 2014 Detlev Offenbach <detlev@die-offenbachs.de>
#

"""
Module implementing a dialog to configure the AdBlock exceptions.
"""

from __future__ import unicode_literals

from PyQt4.QtCore import pyqtSlot
from PyQt4.QtGui import QDialog

from .Ui_AdBlockExceptionsDialog import Ui_AdBlockExceptionsDialog

import UI.PixmapCache


class AdBlockExceptionsDialog(QDialog, Ui_AdBlockExceptionsDialog):
    """
    Class implementing a dialog to configure the AdBlock exceptions.
    """
    def __init__(self, parent=None):
        """
        Constructor
        
        @param parent reference to the parent widget (QWidget)
        """
        super(AdBlockExceptionsDialog, self).__init__(parent)
        self.setupUi(self)
        
        self.iconLabel.setPixmap(
            UI.PixmapCache.getPixmap("adBlockPlusGreen48.png"))
        
        self.hostEdit.setInactiveText(self.tr("Enter host to be added..."))
        
        self.buttonBox.setFocus()
    
    def load(self, hosts):
        """
        Public slot to load the list of excepted hosts.
        
        @param hosts list of excepted hosts
        """
        self.hostList.clear()
        self.hostList.addItems(hosts)
    
    @pyqtSlot(str)
    def on_hostEdit_textChanged(self, txt):
        """
        Private slot to handle changes of the host edit.
        
        @param txt text of the edit (string)
        """
        self.addButton.setEnabled(bool(txt))
    
    @pyqtSlot()
    def on_addButton_clicked(self):
        """
        Private slot to handle a click of the add button.
        """
        self.hostList.addItem(self.hostEdit.text())
        self.hostEdit.clear()
    
    @pyqtSlot()
    def on_hostList_itemSelectionChanged(self):
        """
        Private slot handling a change of the number of selected items.
        """
        self.deleteButton.setEnabled(len(self.hostList.selectedItems()) > 0)
    
    @pyqtSlot()
    def on_deleteButton_clicked(self):
        """
        Private slot handling a click of the delete button.
        """
        for itm in self.hostList.selectedItems():
            row = self.hostList.row(itm)
            removedItem = self.hostList.takeItem(row)
            del removedItem
    
    def accept(self):
        """
        Public slot handling the acceptance of the dialog.
        """
        hosts = []
        for row in range(self.hostList.count()):
            hosts.append(self.hostList.item(row).text())
        
        import Helpviewer.HelpWindow
        Helpviewer.HelpWindow.HelpWindow.adBlockManager().setExceptions(hosts)
        
        super(AdBlockExceptionsDialog, self).accept()
