import json

from django.conf import settings
from django.shortcuts import HttpResponse, get_object_or_404
from django.views.generic import ListView, FormView
from django.http import HttpResponseRedirect

from .models import Gallery, Photo
from .forms import PhotoForm, GalleryForm

from sorl.thumbnail import get_thumbnail

MULTISITE = getattr(settings, 'PHOTOLOGUE_MULTISITE', False)
ENABLE_TAGS = getattr(settings, 'PHOTOLOGUE_ENABLE_TAGS', False)


class AdminViewObject(FormView):
    """
    need overwrite get_form method for every class
    """
    form_class = None
    model = None
    template_name = None
    success_url = None
    obj = None

    def set_obj(self):
        """
        this method must be called in get_form method
         to determine if we changing or creating

        """
        slug = self.kwargs.get('slug')
        if slug:
            obj = get_object_or_404(self.model, slug=slug)
            self.obj =obj
        else:
            self.obj = None

    def form_valid(self, form):
        self.set_obj()
        form.save(obj=self.obj)
        return HttpResponseRedirect(self.success_url)

    def get_context_data(self, **kwargs):
        context = super(AdminViewObject, self).get_context_data(**kwargs)
        context['object'] = self.obj
        context['languages'] = settings.LANGUAGES
        return context


class PhotoView(AdminViewObject):
    model = Photo
    form_class = PhotoForm
    template_name = 'c_admin/photogallery/admin_photo.html'
    success_url = '/admin/photogallery/photo/all/'

    def get_form(self, form_class):

        if self.request.POST:
            return super(PhotoView, self).get_form(form_class)

        self.set_obj()

        if self.obj:
            photo = self.obj
            data = {}
            data['image'] = photo.image.url
            data['sort'] = photo.sort

            for code, name in settings.LANGUAGES:
                obj = Photo._meta.translations_model.objects.get(language_code=code, master__id=getattr(photo, 'id'))  # access to translated fields
                data['title_%s' % code] = obj.title
                data['caption_%s' % code] = obj.caption
            return form_class(data)
        else:
            return form_class()


class GalleryView(AdminViewObject):
    model = Gallery
    form_class = GalleryForm
    template_name = 'c_admin/photogallery/admin_gallery.html'
    success_url = '/admin/photogallery/gallery/all/'

    def get_form(self, form_class):

        if self.request.POST:
            return super(GalleryView, self).get_form(form_class)

        self.set_obj()

        if self.obj:
            gallery = self.obj
            data = {}

            for code, name in settings.LANGUAGES:
                obj = Gallery._meta.translations_model.objects.get(language_code=code, master__id=getattr(gallery, 'id'))  # access to translated fields
                data['title_%s' % code] = obj.title
                data['description_%s' % code] = obj.description
            return form_class(data)
        else:
            return form_class()


class PhotoListView(ListView):
    paginate_by = settings.ADMIN_PAGINATION
    model = Photo
    template_name = 'c_admin/photogallery/admin_photo_list.html'


class GalleryListView(ListView):
    paginate_by = settings.ADMIN_PAGINATION
    model = Gallery
    template_name = 'c_admin/photogallery/admin_gallery_list.html'


def upload_photo(request, id, Model):
    """
    uploading photo to some instance of Model
    instance must have upload_photo method, which download photo
    """
    def get_images_list(obj):
        """
        :param obj: instance of Model
        :return: images list
        """
        images = []
        if obj.photogallery:
            for img in obj.photogallery.photos.all():
                im = get_thumbnail(
                    img.image, '188x143', crop='center', quality=99
                )
                images.append({
                    'name': img.title or img.image.name,
                    'size': img.image.size,
                    'file': im.url,
                    'type': 'image',
                    'remove_url': img.get_delete_url(),
                    'detail_link': img.admin_url()
                })
        return images

    data = {'success': False}
    obj = get_object_or_404(Model, pk=id)

    if request.is_ajax() and request.method == 'POST':
        form = PhotoForm(request.POST, request.FILES)

        if form.is_valid():
            photo = form.save()
            obj.upload_photo(photo)

            im = get_thumbnail(
                photo.image, '188x143', crop='center', quality=99
            )

            data['success'] = True
            data['name'] = photo.title or photo.image.name
            data['size'] = photo.image.size
            data['file'] = im.url
            data['type'] = 'image'
            data['remove_url'] = photo.get_delete_url()
            data['detail_link'] = photo.admin_url()
        else:
            data['errors'] = form.errors

    elif request.is_ajax() and request.method == 'GET':
        data['success'] = True
        data['files'] = get_images_list(obj)

    return HttpResponse(json.dumps(data), content_type='application/json')


def delete_photo(request, photo_id):
    photo = get_object_or_404(Photo, pk=photo_id)
    photo.delete()
    response = {'success': True}
    return HttpResponse(json.dumps(response), content_type='application/json')