from rest_framework.parsers import MultiPartParser, FormParser
from rest_framework.views import APIView
from rest_framework.response import Response
from rest_framework import status
from django.shortcuts import get_object_or_404
from job_apply_form.models.job_apply_form import JobForm
from job_apply_form.serializers.job_apply_form_serializer import JobApplyFormSerializer
from common.pagination.custom_pagination import CustomPageNumberPagination

from drf_yasg.utils import swagger_auto_schema
from drf_yasg import openapi

class JobFormListCreateView(APIView):

    parser_classes = [MultiPartParser, FormParser]

    @swagger_auto_schema(
        operation_description="Submit a job application form with CV upload.",
        request_body=JobApplyFormSerializer,
        responses={
            201: openapi.Response(
                description="Form uploaded successfully",
                schema=JobApplyFormSerializer
            ),
            400: "Validation error"
        },
        consumes=["multipart/form-data"],
        manual_parameters=[
            openapi.Parameter(
                name="file",
                in_=openapi.IN_FORM,
                type=openapi.TYPE_FILE,
                description="Upload CV (PDF, DOCX, etc.)"
            )
        ]
    )
    
    def post(self, request):
        serializer = JobApplyFormSerializer(data=request.data, context={'request': request})
        if serializer.is_valid():
            form = serializer.save()
            data = JobApplyFormSerializer(form, context={'request': request}).data
            return Response(
                {"message": "Job application submitted successfully!", "data": data},
                status=status.HTTP_201_CREATED
            )
        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
    
    def get(self, request):
        forms = JobForm.objects.all().order_by('-uploaded_at')
        paginator = CustomPageNumberPagination()
        result_page = paginator.paginate_queryset(forms, request)
        serializer = JobApplyFormSerializer(result_page, many=True, context={'request': request})
        return Response(serializer.data)


class JobFormDetailView(APIView):
    def get(self, request, pk):
        form = get_object_or_404(JobForm, pk=pk)
        serializer = JobApplyFormSerializer(form, context={'request': request})
        return Response(serializer.data)

    def delete(self, request, pk):
        form = get_object_or_404(JobForm, pk=pk)
        form.file.delete(save=False)  # delete file from storage
        form.delete()
        return Response({"message": "Job form deleted successfully!"}, status=status.HTTP_204_NO_CONTENT)