from django.shortcuts import get_object_or_404, redirect, render
from django.utils.decorators import method_decorator
from django.views.generic import TemplateView, View

from activities.models import PostInteraction, PostInteractionStates
from users.decorators import identity_required
from users.shortcuts import by_handle_or_404


class Post(TemplateView):

    template_name = "activities/post.html"

    def get_context_data(self, handle, post_id):
        identity = by_handle_or_404(self.request, handle, local=False)
        post = get_object_or_404(identity.posts, pk=post_id)
        return {
            "identity": identity,
            "post": post,
            "interactions": PostInteraction.get_post_interactions(
                [post],
                self.request.identity,
            ),
        }


@method_decorator(identity_required, name="dispatch")
class Like(View):
    """
    Adds/removes a like from the current identity to the post
    """

    undo = False

    def post(self, request, handle, post_id):
        identity = by_handle_or_404(self.request, handle, local=False)
        post = get_object_or_404(identity.posts, pk=post_id)
        if self.undo:
            # Undo any likes on the post
            for interaction in PostInteraction.objects.filter(
                type=PostInteraction.Types.like,
                identity=request.identity,
                post=post,
            ):
                interaction.transition_perform(PostInteractionStates.undone)
        else:
            # Make a like on this post if we didn't already
            PostInteraction.objects.get_or_create(
                type=PostInteraction.Types.like,
                identity=request.identity,
                post=post,
            )
        # Return either a redirect or a HTMX snippet
        if request.htmx:
            return render(
                request,
                "activities/_like.html",
                {
                    "post": post,
                    "interactions": {"like": set() if self.undo else {post.pk}},
                },
            )
        return redirect(post.urls.view)


@method_decorator(identity_required, name="dispatch")
class Boost(View):
    """
    Adds/removes a boost from the current identity to the post
    """

    undo = False

    def post(self, request, handle, post_id):
        identity = by_handle_or_404(self.request, handle, local=False)
        post = get_object_or_404(identity.posts, pk=post_id)
        if self.undo:
            # Undo any boosts on the post
            for interaction in PostInteraction.objects.filter(
                type=PostInteraction.Types.boost,
                identity=request.identity,
                post=post,
            ):
                interaction.transition_perform(PostInteractionStates.undone)
        else:
            # Make a boost on this post if we didn't already
            PostInteraction.objects.get_or_create(
                type=PostInteraction.Types.boost,
                identity=request.identity,
                post=post,
            )
        # Return either a redirect or a HTMX snippet
        if request.htmx:
            return render(
                request,
                "activities/_boost.html",
                {
                    "post": post,
                    "interactions": {"boost": set() if self.undo else {post.pk}},
                },
            )
        return redirect(post.urls.view)