# -*- coding:utf-8 -*
#
# Copyright 2016,2017
# - Skia <skia@libskia.so>
#
# Ce fichier fait partie du site de l'Association des Étudiants de l'UTBM,
# http://ae.utbm.fr.
#
# This program is free software; you can redistribute it and/or modify it under
# the terms of the GNU General Public License a published by the Free Software
# Foundation; either version 3 of the License, or (at your option) any later
# version.
#
# This program 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, write to the Free Sofware Foundation, Inc., 59 Temple
# Place - Suite 330, Boston, MA 02111-1307, USA.
#
#

from django.shortcuts import redirect
from django.http import HttpResponse
from django.core.urlresolvers import reverse_lazy, reverse
from django.views.generic import DetailView, TemplateView
from django.views.generic.edit import UpdateView, FormMixin, FormView
from django.utils.translation import ugettext_lazy as _
from django.conf import settings
from django import forms
from django.core.exceptions import PermissionDenied

from ajax_select import make_ajax_field
from ajax_select.fields import AutoCompleteSelectMultipleField

from core.views import CanViewMixin, CanEditMixin
from core.views.files import send_file, FileView
from core.models import SithFile, User, Notification, RealGroup

from sas.models import Picture, Album, PeoplePictureRelation


class SASForm(forms.Form):
    album_name = forms.CharField(label=_("Add a new album"), max_length=30, required=False)
    images = forms.ImageField(widget=forms.ClearableFileInput(attrs={'multiple': True}), label=_("Upload images"),
                              required=False)

    def process(self, parent, owner, files, automodere=False):
        notif = False
        try:
            if self.cleaned_data['album_name'] != "":
                album = Album(parent=parent, name=self.cleaned_data['album_name'], owner=owner, is_moderated=automodere)
                album.clean()
                album.save()
                notif = not automodere
        except Exception as e:
            self.add_error(None, _("Error creating album %(album)s: %(msg)s") %
                           {'album': self.cleaned_data['album_name'], 'msg': repr(e)})
        for f in files:
            new_file = Picture(parent=parent, name=f.name, file=f, owner=owner, mime_type=f.content_type, size=f._size,
                               is_folder=False, is_moderated=automodere)
            if automodere:
                new_file.moderator = owner
            try:
                new_file.clean()
                new_file.generate_thumbnails()
                new_file.save()
                notif = not automodere
            except Exception as e:
                self.add_error(None, _("Error uploading file %(file_name)s: %(msg)s") % {'file_name': f, 'msg': repr(e)})
        if notif:
            for u in RealGroup.objects.filter(id=settings.SITH_GROUP_SAS_ADMIN_ID).first().users.all():
                if not u.notifications.filter(type="SAS_MODERATION", viewed=False).exists():
                    Notification(user=u, url=reverse("sas:moderation"), type="SAS_MODERATION").save()


class RelationForm(forms.ModelForm):
    class Meta:
        model = PeoplePictureRelation
        fields = ['picture']
        widgets = {'picture': forms.HiddenInput}
    users = AutoCompleteSelectMultipleField('users', show_help_text=False, help_text="", label=_("Add user"), required=False)


class SASMainView(FormView):
    form_class = SASForm
    template_name = "sas/main.jinja"
    success_url = reverse_lazy('sas:main')

    def post(self, request, *args, **kwargs):
        self.form = self.get_form()
        parent = SithFile.objects.filter(id=settings.SITH_SAS_ROOT_DIR_ID).first()
        files = request.FILES.getlist('images')
        root = User.objects.filter(username="root").first()
        if request.user.is_authenticated() and request.user.is_in_group(settings.SITH_GROUP_SAS_ADMIN_ID):
            if self.form.is_valid():
                self.form.process(parent=parent, owner=root, files=files, automodere=True)
                if self.form.is_valid():
                    return super(SASMainView, self).form_valid(self.form)
        else:
            self.form.add_error(None, _("You do not have the permission to do that"))
        return self.form_invalid(self.form)

    def get_context_data(self, **kwargs):
        kwargs = super(SASMainView, self).get_context_data(**kwargs)
        kwargs['root_file'] = SithFile.objects.filter(id=settings.SITH_SAS_ROOT_DIR_ID).first()
        kwargs['latest'] = SithFile.objects.filter(is_in_sas=True, is_folder=True, is_moderated=True).order_by('-id')[:5]
        return kwargs


class PictureView(CanViewMixin, DetailView, FormMixin):
    model = Picture
    form_class = RelationForm
    pk_url_kwarg = "picture_id"
    template_name = "sas/picture.jinja"

    def get_initial(self):
        return {'picture': self.object}

    def get(self, request, *args, **kwargs):
        self.object = self.get_object()
        self.form = self.get_form()
        if 'rotate_right' in request.GET.keys():
            self.object.rotate(270)
        if 'rotate_left' in request.GET.keys():
            self.object.rotate(90)
        if 'remove_user' in request.GET.keys():
            try:
                user = User.objects.filter(id=int(request.GET['remove_user'])).first()
                if user.id == request.user.id or request.user.is_in_group(settings.SITH_GROUP_SAS_ADMIN_ID):
                    r = PeoplePictureRelation.objects.filter(user=user, picture=self.object).delete()
            except:
                pass
        if 'ask_removal' in request.GET.keys():
            self.object.is_moderated = False
            self.object.asked_for_removal = True
            self.object.save()
            return redirect("sas:album", album_id=self.object.parent.id)
        return super(PictureView, self).get(request, *args, **kwargs)

    def post(self, request, *args, **kwargs):
        self.object = self.get_object()
        self.form = self.get_form()
        if request.user.is_authenticated() and request.user.is_in_group('ae-membres'):
            if self.form.is_valid():
                for uid in self.form.cleaned_data['users']:
                    u = User.objects.filter(id=uid).first()
                    PeoplePictureRelation(user=u,
                                          picture=self.form.cleaned_data['picture']).save()
                    if not u.notifications.filter(type="NEW_PICTURES", viewed=False).exists():
                        Notification(user=u, url=reverse("core:user_pictures", kwargs={'user_id': u.id}), type="NEW_PICTURES").save()
                return super(PictureView, self).form_valid(self.form)
        else:
            self.form.add_error(None, _("You do not have the permission to do that"))
        return self.form_invalid(self.form)

    def get_context_data(self, **kwargs):
        kwargs = super(PictureView, self).get_context_data(**kwargs)
        kwargs['form'] = self.form
        return kwargs

    def get_success_url(self):
        return reverse('sas:picture', kwargs={'picture_id': self.object.id})


def send_pict(request, picture_id):
    return send_file(request, picture_id, Picture)


def send_compressed(request, picture_id):
    return send_file(request, picture_id, Picture, "compressed")


def send_thumb(request, picture_id):
    return send_file(request, picture_id, Picture, "thumbnail")


class AlbumUploadView(CanViewMixin, DetailView, FormMixin):
    model = Album
    form_class = SASForm
    pk_url_kwarg = "album_id"

    def post(self, request, *args, **kwargs):
        self.object = self.get_object()
        if not self.object.file:
            self.object.generate_thumbnail()
        self.form = self.get_form()
        parent = SithFile.objects.filter(id=self.object.id).first()
        files = request.FILES.getlist('images')
        if request.user.is_authenticated() and request.user.is_subscribed:
            if self.form.is_valid():
                self.form.process(parent=parent, owner=request.user, files=files,
                                  automodere=request.user.is_in_group(settings.SITH_GROUP_SAS_ADMIN_ID))
                if self.form.is_valid():
                    return HttpResponse(str(self.form.errors), status=200)
        return HttpResponse(str(self.form.errors), status=500)


class AlbumView(CanViewMixin, DetailView, FormMixin):
    model = Album
    form_class = SASForm
    pk_url_kwarg = "album_id"
    template_name = "sas/album.jinja"

    def get(self, request, *args, **kwargs):
        self.form = self.get_form()
        if 'clipboard' not in request.session.keys():
            request.session['clipboard'] = []
        return super(AlbumView, self).get(request, *args, **kwargs)

    def post(self, request, *args, **kwargs):
        self.object = self.get_object()
        if not self.object.file:
            self.object.generate_thumbnail()
        self.form = self.get_form()
        if 'clipboard' not in request.session.keys():
            request.session['clipboard'] = []
        if request.user.can_edit(self.object):  # Handle the copy-paste functions
            FileView.handle_clipboard(request, self.object)
        parent = SithFile.objects.filter(id=self.object.id).first()
        files = request.FILES.getlist('images')
        if request.user.is_authenticated() and request.user.is_subscribed:
            if self.form.is_valid():
                self.form.process(parent=parent, owner=request.user, files=files,
                                  automodere=request.user.is_in_group(settings.SITH_GROUP_SAS_ADMIN_ID))
                if self.form.is_valid():
                    return super(AlbumView, self).form_valid(self.form)
        else:
            self.form.add_error(None, _("You do not have the permission to do that"))
        return self.form_invalid(self.form)

    def get_success_url(self):
        return reverse('sas:album', kwargs={'album_id': self.object.id})

    def get_context_data(self, **kwargs):
        kwargs = super(AlbumView, self).get_context_data(**kwargs)
        kwargs['form'] = self.form
        kwargs['clipboard'] = SithFile.objects.filter(id__in=self.request.session['clipboard'])
        return kwargs

# Admin views


class ModerationView(TemplateView):
    template_name = "sas/moderation.jinja"

    def get(self, request, *args, **kwargs):
        if request.user.is_in_group(settings.SITH_GROUP_SAS_ADMIN_ID):
            return super(ModerationView, self).get(request, *args, **kwargs)
        raise PermissionDenied

    def post(self, request, *args, **kwargs):
        if request.user.is_in_group(settings.SITH_GROUP_SAS_ADMIN_ID):
            try:
                a = Album.objects.filter(id=request.POST['album_id']).first()
                if 'moderate' in request.POST.keys():
                    a.moderator = request.user
                    a.is_moderated = True
                    a.save()
                elif 'delete' in request.POST.keys():
                    a.delete()
            except:
                pass
        return super(ModerationView, self).get(request, *args, **kwargs)

    def get_context_data(self, **kwargs):
        kwargs = super(ModerationView, self).get_context_data(**kwargs)
        kwargs['albums_to_moderate'] = Album.objects.filter(is_moderated=False, is_in_sas=True,
                                                            is_folder=True).order_by('id')
        kwargs['pictures'] = Picture.objects.filter(is_moderated=False, is_in_sas=True, is_folder=False)
        kwargs['albums'] = Album.objects.filter(id__in=kwargs['pictures'].values('parent').distinct('parent'))
        return kwargs


class PictureEditForm(forms.ModelForm):
    class Meta:
        model = Picture
        fields = ['name', 'parent']
    parent = make_ajax_field(Picture, 'parent', 'files', help_text="")


class AlbumEditForm(forms.ModelForm):
    class Meta:
        model = Album
        fields = ['name', 'date', 'file', 'parent', 'edit_groups']
    date = forms.DateField(label=_("Date"), widget=SelectDate, required=True)
    parent = make_ajax_field(Album, 'parent', 'files', help_text="")
    edit_groups = make_ajax_field(Album, 'edit_groups', 'groups', help_text="")
    recursive = forms.BooleanField(label=_("Apply rights recursively"), required=False)


class PictureEditView(CanEditMixin, UpdateView):
    model = Picture
    form_class = PictureEditForm
    template_name = 'core/edit.jinja'
    pk_url_kwarg = "picture_id"


class AlbumEditView(CanEditMixin, UpdateView):
    model = Album
    form_class = AlbumEditForm
    template_name = 'core/edit.jinja'
    pk_url_kwarg = "album_id"

    def form_valid(self, form):
        ret = super(AlbumEditView, self).form_valid(form)
        if form.cleaned_data['recursive']:
            self.object.apply_rights_recursively(True)
        return ret