from django.core.paginator import Paginator
from django.shortcuts import get_object_or_404, redirect, render
from django.views.generic import DetailView, ListView, TemplateView

from .models import Album, Photo, Redir


class Main(TemplateView):
    template_name = "gallery/main.html"

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        session_expiry = self.request.session.get_expiry_date()
        context['session_expiry'] = session_expiry
        return context


class AlbumsList(ListView):
    model = Album
    template_name = 'gallery/album_list.html'
    queryset = Album.objects.filter(is_public=True)
    ordering = ['-album_date']
    paginate_by = 30


class AlbumDetail(DetailView):
    model = Album
    template_name = 'gallery/album_detail.html'

    def get_object(self, queryset=None):
        return get_object_or_404(Album, slug=self.kwargs.get('album_slug'))

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        photos = self.object.photos.all().order_by('taken_at')

        # Pagination
        paginator = Paginator(photos, 30)
        page_number = self.request.GET.get('page')
        page_obj = paginator.get_page(page_number)

        # Return
        context['photos'] = page_obj.object_list
        context['page_obj'] = page_obj
        return context


class PhotosList(ListView):
    model = Photo
    paginate_by = 30
    ordering = ['-taken_at']


class PhotoDetail(DetailView):
    model = Photo
    slug_url_kwarg = 'photo_slug'
    template_name = 'gallery/photo_detail.html'

    def get_object(self, queryset=None):
        album_slug = self.kwargs.get('album_slug')
        photo_slug = self.kwargs.get('photo_slug')
        photo = get_object_or_404(Photo, slug=photo_slug, album__slug=album_slug)

        if photo.slug not in self.request.session:
            photo.add_view()
            self.request.session[photo.slug] = 0

        return photo

    def get_context_data(self, *args, **kwargs):
        context = super().get_context_data(*args, **kwargs)
        context["next"] = self.object.get_next()
        context["prev"] = self.object.get_prev()
        return context

    def post(self, request, *args, **kwargs):
        photo = self.get_object()

        if request.POST.get("like") == "true":
            if self.request.session.get(photo.slug) == 0:
                photo.add_like()
                self.request.session[photo.slug] = 1

                if request.user.is_authenticated:
                    photo.is_favorite = True
                photo.save()

        return redirect('gallery:photo_url', album_slug=self.kwargs['album_slug'], photo_slug=self.kwargs['photo_slug'])



def redirect_to_album(request, redir_path):
    redir = get_object_or_404(Redir, path=redir_path)  
    return redirect('gallery:album_url', album_slug=redir.album.slug)