'''
Task Coach - Your friendly task manager
Copyright (C) 2004-2013 Task Coach developers <developers@taskcoach.org>

Task Coach 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.

Task Coach 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, see <http://www.gnu.org/licenses/>.
'''

from taskcoachlib import patterns
from taskcoachlib.i18n import _
from taskcoachlib.domain import note
import base


class NewNoteCommand(base.NewItemCommand):
    singular_name = _('New note')
    
    def __init__(self, *args, **kwargs):
        subject = kwargs.pop('subject', _('New note'))
        description = kwargs.pop('description', '')
        attachments = kwargs.pop('attachments', [])
        categories = kwargs.get('categories',  None)
        super(NewNoteCommand, self).__init__(*args, **kwargs)
        self.items = self.notes = [note.Note(subject=subject,
            description=description, categories=categories, 
            attachments=attachments)]
        

class NewSubNoteCommand(base.NewSubItemCommand):
    plural_name = _('New subnotes')
    singular_name = _('New subnote of "%s"')

    def __init__(self, *args, **kwargs):
        subject = kwargs.pop('subject', _('New subnote'))
        description = kwargs.pop('description', '')
        attachments = kwargs.pop('attachments', [])
        categories = kwargs.get('categories',  None)
        super(NewSubNoteCommand, self).__init__(*args, **kwargs)
        self.items = self.notes = [parent.newChild(subject=subject,
            description=description, categories=categories,
            attachments=attachments) for parent in self.items]
        self.save_modification_datetimes()
                

class DeleteNoteCommand(base.DeleteCommand):
    plural_name = _('Delete notes')
    singular_name = _('Delete note "%s"')
    
    
class DragAndDropNoteCommand(base.DragAndDropCommand):
    plural_name = _('Drag and drop notes')
    singular_name = _('Drag and drop note "%s"')


class AddNoteCommand(base.BaseCommand):
    plural_name = _('Add note')
    singular_name = _('Add note to "%s"')

    def __init__(self, *args, **kwargs):
        self.owners = []
        super(AddNoteCommand, self).__init__(*args, **kwargs)
        self.owners = self.items
        self.items = self.__notes = [note.Note(subject=_('New note')) \
                                   for dummy in self.items]
        self.save_modification_datetimes()
        
    def modified_items(self):
        return self.owners

    def name_subject(self, newNote): # pylint: disable=W0613
        # Override to use the subject of the owner of the new note instead
        # of the subject of the new note itself, which wouldn't be very
        # interesting because it's something like 'New note'.
        return self.owners[0].subject()
    
    @patterns.eventSource
    def addNotes(self, event=None):
        for owner, note in zip(self.owners, self.__notes): # pylint: disable=W0621
            owner.addNote(note, event=event)

    @patterns.eventSource
    def removeNotes(self, event=None):
        for owner, note in zip(self.owners, self.__notes): # pylint: disable=W0621
            owner.removeNote(note, event=event)
    
    def do_command(self):
        super(AddNoteCommand, self).do_command()
        self.addNotes()
        
    def undo_command(self):
        super(AddNoteCommand, self).undo_command()
        self.removeNotes()
        
    def redo_command(self):
        super(AddNoteCommand, self).redo_command()
        self.addNotes()    


class AddSubNoteCommand(base.BaseCommand):
    plural_name = _('Add subnote')
    singular_name = _('Add subnote to "%s"')
    
    def __init__(self, *args, **kwargs):
        self.__owner = kwargs.pop('owner')
        self.__parents = []
        super(AddSubNoteCommand, self).__init__(*args, **kwargs)
        self.__parents = self.items
        self.__notes = kwargs.get('notes', [note.Note(subject=_('New subnote'),
                                                      parent=parent) \
                                            for parent in self.__parents])
        self.items = self.__notes
        self.save_modification_datetimes()
        
    def modified_items(self):
        return self.__parents + [self.__owner]
    
    @patterns.eventSource
    def addNotes(self, event=None):
        for parent, subnote in zip(self.__parents, self.__notes):
            parent.addChild(subnote, event=event)
            self.__owner.addNote(subnote, event=event)

    @patterns.eventSource
    def removeNotes(self, event=None):
        for parent, subnote in zip(self.__parents, self.__notes):
            parent.removeChild(subnote, event=event)
            self.__owner.removeNote(subnote, event=event)
    
    def do_command(self):
        super(AddSubNoteCommand, self).do_command()
        self.addNotes()
        
    def undo_command(self):
        super(AddSubNoteCommand, self).undo_command()
        self.removeNotes()
        
    def redo_command(self):
        super(AddSubNoteCommand, self).redo_command()
        self.addNotes()


class RemoveNoteCommand(base.BaseCommand):
    plural_name = _('Remove note')
    singular_name = _('Remove note from "%s"')
    
    def __init__(self, *args, **kwargs):
        self.__notes = kwargs.pop('notes')
        super(RemoveNoteCommand, self).__init__(*args, **kwargs)

    @patterns.eventSource
    def addNotes(self, event=None):
        kwargs = dict(event=event)
        for item in self.items:
            item.addNotes(*self.__notes, **kwargs) # pylint: disable=W0142
        
    @patterns.eventSource
    def removeNotes(self, event=None):
        # pylint: disable=W0142
        kwargs = dict(event=event)
        for item in self.items:
            for eachNote in self.__notes:
                if eachNote.parent():
                    eachNote.parent().removeChild(eachNote, **kwargs)
            item.removeNotes(*self.__notes, **kwargs) 
                
    def do_command(self):
        super(RemoveNoteCommand, self).do_command()
        self.removeNotes()
        
    def undo_command(self):
        super(RemoveNoteCommand, self).undo_command()
        self.addNotes()

    def redo_command(self):
        super(RemoveNoteCommand, self).redo_command()
        self.removeNotes()
