from rest_framework.decorators import api_view
from rest_framework.parsers import FormParser, MultiPartParser
from rest_framework.views import APIView
from rest_framework.response import Response
from rest_framework.permissions import IsAuthenticatedOrReadOnly, IsAuthenticated
from rest_framework import status

from .models import Book, CustomUser
from .serializers import BookSerializer

class BookListCreateView(APIView):
    permission_classes = [IsAuthenticatedOrReadOnly]
    parser_classes = [MultiPartParser, FormParser]

    def get(self, request):
        books = Book.objects.all()
        serializer = BookSerializer(books, many=True)
        return Response(serializer.data)

    def post(self, request):
        serializer = BookSerializer(data=request.data)
        if serializer.is_valid():
            serializer.save()
            return Response(serializer.data, status=status.HTTP_201_CREATED)
        
        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)


class BookDetailView(APIView):
    permission_classes = [IsAuthenticatedOrReadOnly]
    parser_classes = [MultiPartParser, FormParser]

    def put(self, request, book_id):
        book = Book.objects.get(id=book_id)
        serializer = BookSerializer(book, data=request.data)
        if serializer.is_valid():
            serializer.save()
            return Response(serializer.data, status=status.HTTP_200_OK)
        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)

    def delete(self, request, book_id):
        try:
            book = Book.objects.get(id=book_id)
            book.delete()
            return Response(status=status.HTTP_204_NO_CONTENT)
        except Book.DoesNotExist:
            return Response({"message": "Ce livre n'existe pas"}, status=status.HTTP_404_NOT_FOUND)


@api_view(['GET'])
def find_user_by_id(request, user_id):
    try:
        user = CustomUser.objects.get(id=user_id)
        books_queryset = Book.objects.filter(user=user)
        books_serializer = BookSerializer(books_queryset, many=True)
        return Response({
            'id': user.id,
            'username': user.username,
            'first_name': user.first_name,
            'last_name': user.last_name,
            'email': user.email,
            'profile_picture': user.avatar.url if user.avatar else '',
            'books': books_serializer.data,
        })

    except CustomUser.DoesNotExist:
        return Response({"message": "Cet utilisateur n'existe pas"}, status=status.HTTP_404_NOT_FOUND)

class UserProfileView(APIView):
    permission_classes = [IsAuthenticated]

    def get(self,request):
        user = request.user
        books_queryset = Book.objects.filter(user=user)
        books_serializer = BookSerializer(books_queryset, many=True)
        return Response({
            'id': user.id,
            'username': user.username,
            'first_name': user.first_name,
            'last_name': user.last_name,
            'email': user.email,
            'profile_picture': user.avatar.url if user.avatar else '',
            'books': books_serializer.data,
        })