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

from company_portfolio_business.models.company_portfolio_business import CompanyPortfolioBusiness
from company_portfolio_business.serializers.company_portfolio_business import CompanyPortfolioBusinessSerializer
from common.pagination.custom_pagination import CustomPageNumberPagination
from common.exceptions.exceptions import custom_exception_handler

from rest_framework.parsers import MultiPartParser, FormParser
from rest_framework.permissions import IsAuthenticated

class CompanyPortfolioBusinessPublicListAPIView(APIView):
    """Public endpoint to list all company portfolio business for website users"""
    
    def get(self, request):
        service = CompanyPortfolioBusiness.objects.filter()
        paginator = CustomPageNumberPagination()
        result_page = paginator.paginate_queryset(service, request)
        serializer = CompanyPortfolioBusinessSerializer(result_page, many=True, context={'request': request})
        return paginator.get_paginated_response(serializer.data)


class CompanyPortfolioBusinessListCreateAPIView(APIView):
    parser_classes = [MultiPartParser, FormParser]
    permission_classes = [IsAuthenticated]

    @swagger_auto_schema(request_body=CompanyPortfolioBusinessSerializer)
    def post(self, request):
        serializer = CompanyPortfolioBusinessSerializer(data=request.data, context={'request': request})
        serializer.is_valid(raise_exception=True)
        serializer.save(created_by=request.user)
        return Response({"success": "Company Portfoio business created successfully"}, status=status.HTTP_201_CREATED)
    
    def get(self, request):
        """Authenticated endpoint - returns portfolio filtered by user role"""
        service = CompanyPortfolioBusiness.objects.filter()
        
        user = request.user
        if user.role == 'admin':
            pass
        else:
            service = service.filter(created_by=user)
        
        paginator = CustomPageNumberPagination()
        result_page = paginator.paginate_queryset(service, request)
        serializer = CompanyPortfolioBusinessSerializer(result_page, many=True, context={'request': request})
        return paginator.get_paginated_response(serializer.data)
    

class CompanyPortfolioBusinessDetailAPIView(APIView):
    parser_classes = [MultiPartParser, FormParser]

    @swagger_auto_schema(request_body=CompanyPortfolioBusinessSerializer)
    def put(self, request, pk):
        service = get_object_or_404(CompanyPortfolioBusiness, pk=pk)
        serializer = CompanyPortfolioBusinessSerializer(service, data=request.data, context={'request': request})
        serializer.is_valid(raise_exception=True)
        serializer.save()
        return Response({"success": "Company Portfolio Business updated successfully"}, status=status.HTTP_200_OK)
    
    def get(self, request, pk):
        service = get_object_or_404(CompanyPortfolioBusiness, pk=pk)
        serializer = CompanyPortfolioBusinessSerializer(service, context={'request': request})
        return Response(serializer.data)
    
    def delete(self, request, pk):
        service = get_object_or_404(CompanyPortfolioBusiness, pk=pk)
        service.delete()
        return Response({"success": "Company Portfolio Business deleted successfully"}, status=status.HTTP_200_OK)