from django.shortcuts import get_object_or_404, redirect

from boards.abstracts.settingsmanager import get_settings_manager, \
        SETTING_FAVORITE_TAGS, SETTING_HIDDEN_TAGS
from boards.models import Tag
from boards.views.all_threads import AllThreadsView, DEFAULT_PAGE
from boards.views.mixins import DispatcherMixin
from boards.forms import ThreadForm, PlainErrorList

PARAM_HIDDEN_TAGS = 'hidden_tags'
PARAM_TAG = 'tag'
PARAM_IS_FAVORITE = 'is_favorite'
PARAM_IS_HIDDEN = 'is_hidden'

__author__ = 'neko259'


class TagView(AllThreadsView, DispatcherMixin):

    tag_name = None

    def get_threads(self):
        tag = get_object_or_404(Tag, name=self.tag_name)

        hidden_tags = self.settings_manager.get_hidden_tags()

        try:
            hidden_tags.remove(tag)
        except ValueError:
            pass

        return tag.get_threads().exclude(
            tags__in=hidden_tags)

    def get_context_data(self, **kwargs):
        params = super(TagView, self).get_context_data(**kwargs)

        settings_manager = get_settings_manager(kwargs['request'])

        tag = get_object_or_404(Tag, name=self.tag_name)
        params[PARAM_TAG] = tag

        fav_tag_names = settings_manager.get_setting(SETTING_FAVORITE_TAGS)
        hidden_tag_names = settings_manager.get_setting(SETTING_HIDDEN_TAGS)

        params[PARAM_IS_FAVORITE] = fav_tag_names is not None and tag.name in fav_tag_names
        params[PARAM_IS_HIDDEN] = hidden_tag_names is not None and tag.name in hidden_tag_names

        return params

    def get(self, request, tag_name, page=DEFAULT_PAGE, form=None):
        self.tag_name = tag_name

        return super(TagView, self).get(request, page, form)


    def post(self, request, tag_name, page=DEFAULT_PAGE):
        self.tag_name = tag_name

        if 'method' in request.POST:
            self.dispatch_method(request)
            form = None
        else:
            form = ThreadForm(request.POST, request.FILES,
                              error_class=PlainErrorList)
            form.session = request.session

            if form.is_valid():
                return self.create_thread(request, form)
            if form.need_to_ban:
                # Ban user because he is suspected to be a bot
                self._ban_current_user(request)

        return redirect('tag', tag_name)

    def subscribe(self, request):
        tag = get_object_or_404(Tag, name=self.tag_name)

        settings_manager = get_settings_manager(request)
        settings_manager.add_fav_tag(tag)

    def unsubscribe(self, request):
        tag = get_object_or_404(Tag, name=self.tag_name)

        settings_manager = get_settings_manager(request)
        settings_manager.del_fav_tag(tag)

    def hide(self, request):
        """
        Adds tag to user's hidden tags. Threads with this tag will not be
        shown.
        """

        tag = get_object_or_404(Tag, name=self.tag_name)

        settings_manager = get_settings_manager(request)
        settings_manager.add_hidden_tag(tag)

    def unhide(self, request):
        """
        Removed tag from user's hidden tags.
        """

        tag = get_object_or_404(Tag, name=self.tag_name)

        settings_manager = get_settings_manager(request)
        settings_manager.del_hidden_tag(tag)