from rest_framework.views import APIView
from rest_framework.response import Response
from rest_framework import status
from rest_framework.pagination import PageNumberPagination
from rest_framework.exceptions import ValidationError, NotFound
from drf_yasg.utils import swagger_auto_schema
from django.shortcuts import get_object_or_404

from api.property_api.city.models.city import City
from api.property_api.city.serializers.city_serializer import CitySerializer, CityDropdownSerializer

from common.pagination.custom_pagination import CustomPageNumberPagination
from rest_framework.parsers import MultiPartParser,FormParser


class CityListCreateAPIView(APIView):
    parser_classes = [MultiPartParser, FormParser]
    
    @swagger_auto_schema(request_body=CitySerializer)
    def post(self, request):
        serializer = CitySerializer(data=request.data, context={'request': request})
        serializer.is_valid(raise_exception=True)
        serializer.save()
        return Response({"success": "City created successfully"}, status=status.HTTP_201_CREATED)
    
    def get(self, request):
        is_filter = request.query_params.get('is_active') == 'true'
        search = request.query_params.get('search')
        state_id = request.query_params.get('state')
        cities = City.objects.all()
        if state_id:
            cities = cities.filter(state_id=state_id)
        if search:
            cities = City.objects.filter(name__icontains=search)
        if is_filter:
            cities = cities.filter(is_active=True)
        cities = cities.select_related('state').prefetch_related('property_city__media','property_city__property') #todo: property_facilities add later
        paginator = CustomPageNumberPagination()
        result_page = paginator.paginate_queryset(cities, request)
        serializer = CitySerializer(result_page, many=True, context={'request': request})
        return paginator.get_paginated_response(serializer.data)
    

class CityDetailAPIView(APIView):
    parser_classes = [MultiPartParser, FormParser]
    
    @swagger_auto_schema(request_body=CitySerializer)
    def put(self, request, pk):
        city = get_object_or_404(City, pk=pk)
        serializer = CitySerializer(city, data=request.data, context={'request': request})
        serializer.is_valid(raise_exception=True)
        serializer.save()
        return Response({"success": "City updated successfully"}, status=status.HTTP_200_OK)

    def get(self, request, pk):
        city = get_object_or_404(City.objects.all().select_related('state').prefetch_related('property_city__media','property_city__property'), pk=pk)
        serializer = CitySerializer(city, context={'request': request})
        return Response(serializer.data)

    def delete(self, request, pk):
        city = get_object_or_404(City, pk=pk)
        city.delete()
        return Response({"success": "City deleted successfully"}, status=status.HTTP_200_OK)
    

class CityDropdownAPIView(APIView):
    def get(self, request):
        cities = City.objects.all()
        if not cities.exists():
            raise NotFound("No active Cities found.")

        serializer = CityDropdownSerializer(cities, many=True)
        return Response(serializer.data, status=status.HTTP_200_OK)
    

class CityExistAPIView(APIView):
    def get(self, request, name):
        if not isinstance(name, str) or not name.strip():
            raise ValidationError("City name is required.")

        trimmed_name = name.strip()
        exists = City.objects.filter(name__iexact=trimmed_name).exists()
        return Response({"isExist": exists}, status=status.HTTP_200_OK)