from django.shortcuts import render
from django.views.generic import ListView,DetailView,CreateView,UpdateView,DeleteView
from .models import Post
from .forms import PostForm


class PostListView(ListView):
    queryset = Post.objects.all()
    template_name = 'post_view.html'

    # override get_context_data for adding the last_viewed_post on the context
    def get_context_data(self,**kwargs):
        context = super().get_context_data(**kwargs)
        post_id = self.request.session.get('last_viewed_product_id',False)
        context['last_viewed_post'] = self.model.objects.get(id=post_id)
        return context
    # override the get_queryset for adding search feature
    def get_queryset(self):
        q = self.request.GET.get('q')
        query = Post.objects.all()
        if q :
            query = query.filter(description__contains=q)
            print(query)
            return query
        return query

class PostDetaiView(DetailView):
    model = Post
    template_name = 'post_detail.html'

    # override the get_object for setting the last viewed product id on the session
    def get_object(self):
         post_id = self.kwargs['pk']
         self.request.session['last_viewed_product_id'] = post_id
         product_obj = self.model.objects.get(id=post_id)
         return product_obj



class PostCreateView(CreateView):
    model = Post
    form_class = PorductForm
    template_name = 'post_create.html'
    success_url = '/'

    # override form_valid for setting the author before validate the form
    def form_valid(self,form):
        if request.user.is_autheticated :
            form.instance.author = request.user
        return super().form_valid(form)

class PostUpdateView(UpdateView):
    model = Post
    form_class= PorductForm
    template_name = 'post_update.html'
    success_url = '/'

    # override form_valid for setting the last author that update the post  before validate the form
    def form_valid(self,form):
        if request.user.is_autheticated :
            form.instance.last_update_by = request.user
        return super().form_valid(form)