class Account(models.Model):
      ACCOUNT_TYPES = (
          ('SA' , 'Savings Account' ),
          ('CA' , 'Current Account' ),
          ('JA' , 'Joint Account' ),
      )
      owner = models.ForeignKey(User, on_delete=models.CASCADE,
      related_name='accounts', verbose_name='The related user')
      account_type = models.CharField(max_length=2, choices=ACCOUNT_TYPES)
      account_number = models.CharField(max_length=13, unique=True)
      account_balance = models.DecimalField(max_digits=18, decimal_places=2)
      last_deposit = models.DecimalField(max_digits=10, decimal_places=2)
      interest_rate = models.DecimalField(max_digits=3, decimal_places=0)
      date_created = models.DateField(auto_now_add=True)

      def __str__(self):
          return self.account_number



class Transaction(models.Model):
      owner = models.ForeignKey(User, on_delete=models.CASCADE, blank=True,
      null=True)
      from_account = models.CharField(max_length=13)
      to_account = models.CharField(max_length=13)
      amount = models.DecimalField(max_digits=10, decimal_places=2)
      date_created = models.DateField(auto_now_add=True)

      def __str__(self):
        return str(self.amount)


    @login_required(login_url='../../accounts/login/')
def send(request):
    if request.method == 'POST':
        form = forms.TransactionForm(request.POST)
        if form.is_valid():
            sender = Account.objects.get(account_number=request.POST.get('from_account'))
            if sender.account_balance > decimal.Decimal(request.POST.get('amount')):

                trans =  form.save()
                trans.owner = request.user
                trans.save()

                # debit the sender account
                sender.account_balance -= decimal.Decimal(request.POST.get('amount'))
                sender.save()

                #credit the receiver account
                receiver = Account.objects.get(account_number=request.POST.get('to_account'))
                receiver.account_balance += decimal.Decimal(request.POST.get('amount'))
                receiver.save()

                return HttpResponseRedirect(reverse_lazy('customers:history'))
            # else:
            #     return
    else:
        form = forms.TransactionForm()
        return render(request, "customers/send_money.html", {'form': form})