# api/views.py
from rest_framework import generics, viewsets, permissions,status
from django.contrib.auth import get_user_model
from rest_framework_simplejwt.views import TokenObtainPairView
from .serializers import RegisterSerializer, LinkSerializer, LinkGroupSerializer
from .models import Link, LinkGroup
from rest_framework.views import APIView
from rest_framework.response import Response
from django.shortcuts import get_object_or_404



User = get_user_model()

@extend_schema(
    parameters=[
        OpenApiParameter(
            name='id',
            type=int,
            location=OpenApiParameter.PATH
        )
    ]
)

class RegisterView(generics.CreateAPIView):
    queryset = User.objects.all()
    permission_classes = (permissions.AllowAny,)
    serializer_class = RegisterSerializer

class LoginView(TokenObtainPairView):
    permission_classes = (permissions.AllowAny,)

class LinkGroupViewSet(viewsets.ModelViewSet):
    queryset = LinkGroup.objects.all()
    serializer_class = LinkGroupSerializer
    permission_classes = [permissions.IsAuthenticated]

    def get_queryset(self):
        # возвращаем только группы текущего пользователя
        return self.queryset.filter(owner=self.request.user).order_by('order')

class LinkViewSet(viewsets.ModelViewSet):
    serializer_class = LinkSerializer
    permission_classes = (permissions.IsAuthenticated,)

    def get_queryset(self):
        return Link.objects.filter(owner=self.request.user).order_by('order')

    def perform_create(self, serializer):
        serializer.save(owner=self.request.user)

class UserLinksListView(generics.ListAPIView):
    serializer_class = LinkSerializer
    permission_classes = (permissions.AllowAny,)

    def get_queryset(self):
        username = self.kwargs['username']
        return Link.objects.filter(owner__username=username).order_by('order')
    
    
from .serializers import UserSerializer  # нужно завести сериализатор для пользователя

User = get_user_model()

class UserProfileView(generics.RetrieveAPIView):
    """
    Возвращает данные авторизованного пользователя.
    GET /api/auth/user/
    """
    serializer_class = UserSerializer
    permission_classes = [permissions.IsAuthenticated]

    def get_object(self):
        return self.request.user
    
    
class PublicUserGroupsView(APIView):
    """
    GET /api/users/{username}/public/
    """
    permission_classes = [permissions.AllowAny]

    def get(self, request, username):
        User = get_user_model()
        user = get_object_or_404(User, username=username)

        # Берём все группы пользователя вместе с их ссылками
        groups_qs = LinkGroup.objects.filter(owner=user).prefetch_related('links')

        result = {
            "username": user.username,
            "groups": []
        }

        for grp in groups_qs:
            # поле image у группы
            grp_image_url = grp.image.url if getattr(grp, 'image', None) else None

            grp_data = {
                "id": grp.id,
                "name": grp.name,
                "image": grp_image_url,
                "links": [],
            }

            for ln in grp.links.all():
                # поле image у отдельной ссылки
                link_image_url = ln.image.url if getattr(ln, 'image', None) else None

                grp_data["links"].append({
                    "id": ln.id,
                    "title": ln.title,
                    "url": ln.url,
                    "image": link_image_url,
                })

            result["groups"].append(grp_data)

        return Response(result, status=status.HTTP_200_OK)