from django.shortcuts import render, get_object_or_404
from django.http import HttpResponse
from .models import Post
from django.views.generic import (ListView,
                                  DetailView,
                                  CreateView,
                                  UpdateView,
                                  DeleteView)
from django.contrib.auth.mixins import LoginRequiredMixin, UserPassesTestMixin
from django.contrib.auth.models import User


# # Create your views here.

# function-based views

# def home(request):
#     # return HttpResponse("<h1>hullo :)</h1>")
#     ontext = {
#         # "posts": DUMMY_CONTENT
#         "posts": Post.objects.all()
#     }
#     return render(request, "blog/home.html", context=ontext)

# class-based views

class PostListView(ListView):
    model = Post
    template_name = 'blog/home.html'  # <app>/<model>_<viewtype>.html
    # by default ListView will want to loop over a variable called `object_list`, but we called it `posts`
    # in the dictionary above
    context_object_name = 'posts'
    ordering = ['date_posted']  # oldest to newst
    # ordering = ['-date_posted'] # newest to oldest


class PostDetailView(DetailView):
    model = Post


class PostCreateView(LoginRequiredMixin, CreateView):
    model = Post
    fields = ['title', 'content']

    def form_valid(self, form):
        '''
        Assign the currently logged-in user as the author of this post
        '''
        form.instance.author = self.request.user
        return super().form_valid(form)



class PostUpdateView(LoginRequiredMixin, UserPassesTestMixin, UpdateView):
    model = Post
    fields = ['title', 'content']

    def form_valid(self, form):
        '''
        Assign the currently logged-in user as the author of this post
        '''
        form.instance.author = self.request.user
        return super().form_valid(form)

    def test_func(self):
        '''
        Check that the currently logged-in user is the author of the post attempting to be updated
        '''
        post = self.get_object()
        return self.request.user == post.author


class PostDeleteView(LoginRequiredMixin, UserPassesTestMixin, DeleteView):
    model = Post
    success_url = '/'

    def test_func(self):
        '''
        Check that the currently logged-in user is the author of the post attempting to be updated
        '''
        post = self.get_object()
        return self.request.user == post.author


class UserPostListView(ListView):
    model = Post
    template_name = 'blog/user_posts.html'  # <app>/<model>_<viewtype>.html
    # by default ListView will want to loop over a variable called `object_list`, but we called it `posts`
    # in the dictionary above
    context_object_name = 'posts'
    ordering = ['date_posted']  # oldest to newst

    # ordering = ['-date_posted'] # newest to oldest

    def get_queryset(self):
        user = get_object_or_404(User, username=self.kwargs.get('username'))
        return Post.objects.filter(author=user).order_by('-date_posted')


def about(request):
    # return HttpResponse()
    return render(request, "blog/about.html", context={'title': 'A nice little title for the about page'})


from django.shortcuts import render

# Create your views here.