from rest_framework.permissions import IsAuthenticated
from accounts.permissions import IsTeacher, IsStudent
from rest_framework import viewsets, generics
from .serializers import TransactionSerializer
from .models import Transaction


class TransactionViewSet(viewsets.ModelViewSet):
    # Only allow GET, POST/CREATE
    # Transactions cannot be deleted
    http_method_names = ['get', 'post', 'patch']
    permission_classes = [IsAuthenticated]
    serializer_class = TransactionSerializer
    queryset = Transaction.objects.all()


class TransactionByStudentViewSet(generics.ListAPIView):
    # Viewset for GET only
    http_method_names = ['get']
    permission_classes = [IsAuthenticated, IsStudent]
    serializer_class = TransactionSerializer
    queryset = Transaction.objects.all()

    def get_queryset(self):
        user = self.request.user
        transactions = Transaction.objects.filter(borrower=user)
        return transactions


class TransactionByTeacherViewSet(generics.ListAPIView):
    # Viewset for GET only
    http_method_names = ['get']
    permission_classes = [IsAuthenticated, IsTeacher]
    serializer_class = TransactionSerializer
    queryset = Transaction.objects.all()

    def get_queryset(self):
        user = self.request.user
        transactions = Transaction.objects.filter(teacher=user)
        return transactions