from django.test import TestCase
from rest_framework.test import APITestCase
from rest_framework import status
from rest_framework.reverse import reverse
from .serializers import (CreateTransactionSerializer)
from .models import Transaction
from django.contrib.auth import get_user_model

User = get_user_model()

# Create your tests here.

class TransactionsSerializerTest(TestCase):
    """ Test module for test all serializers API """
    user_error = {
        "reference": "000050",
        "account": "C00099",
        "date": "2020-01-03",
        "amount": -25.10,
        "type": "outflow",
        "category": "groceries",
        "user_id": -99
    }
    inflow_ok = {
        "reference": "000051",
        "account": "C00099",
        "date": "2020-01-03",
        "amount": 51.13,
        "type": "inflow",
        "category": "groceries",
        "user_id": 1
      }
    inflow_error = {
        "reference": "000052",
        "account": "C00099",
        "date": "2020-01-03",
        "amount": -51.13,
        "type": "inflow",
        "category": "groceries",
        "user_id": 1
    }
    outflow_ok = {
        "reference": "000053",
        "account": "C00099",
        "date": "2020-01-03",
        "amount": -25.10,
        "type": "outflow",
        "category": "groceries",
        "user_id": 1
    }
    outflow_error = {
        "reference": "000054",
        "account": "C00099",
        "date": "2020-01-03",
        "amount": 25.10,
        "type": "outflow",
        "category": "groceries",
        "user_id": 1
    }
    type_error = {
        "reference": "000055",
        "account": "C00099",
        "date": "2020-01-03",
        "amount": 25.10,
        "type": "another_type",
        "category": "groceries",
        "user_id": 1
    }
    date_error = {
        "reference": "000052",
        "account": "C00099",
        "amount": -51.13,
        "type": "inflow",
        "category": "groceries",
        "user_id": 1
    }



    def setUp(self):
        user = User.objects.create(id=1,name='test',email='test@test.com',age=18)

    def test_wrong_outflow_value(self):
        serializer = CreateTransactionSerializer(data=self.outflow_error)
        self.assertEqual(serializer.is_valid(), False)
        self.assertEqual(set(serializer.errors.keys()), set(['amount']))

    def test_wrong_inflow_value(self):
        serializer = CreateTransactionSerializer(data=self.inflow_error)
        self.assertEqual(serializer.is_valid(), False)
        self.assertEqual(set(serializer.errors.keys()), set(['amount']))

    def test_wrong_type_value(self):
        serializer = CreateTransactionSerializer(data=self.type_error)
        self.assertEqual(serializer.is_valid(), False)
        self.assertEqual(set(serializer.errors.keys()), set(['type']))

    def test_wrong_user_value(self):
        serializer = CreateTransactionSerializer(data=self.user_error)
        self.assertEqual(serializer.is_valid(), False)
        self.assertEqual(set(serializer.errors.keys()), set(['user_id']))

    def test_wrong_date_value(self):
        serializer = CreateTransactionSerializer(data=self.date_error)
        self.assertEqual(serializer.is_valid(), False)
        self.assertEqual(set(serializer.errors.keys()), set(['date']))

    def test_pass_inflow(self):
        serializer = CreateTransactionSerializer(data=self.inflow_ok)
        self.assertEqual(serializer.is_valid(), True)

    def test_pass_outflow(self):
        serializer = CreateTransactionSerializer(data=self.outflow_ok)
        self.assertEqual(serializer.is_valid(), True)


class TransactionViewTest(APITestCase):
    """ Test case for Transactions Views """
    inflow_ok = {
        "reference": "000051",
        "account": "C00099",
        "date": "2020-01-03",
        "amount": 51.1,
        "type": "inflow",
        "category": "salary",
        "user_id": 1
    }
    outflow_ok = {
        "reference": "000053",
        "account": "C00099",
        "date": "2020-01-03",
        "amount": -25.10,
        "type": "outflow",
        "category": "groceries",
        "user_id": 1
    }
    balance_expected = [{
        "account": "C00099",
        "balance": inflow_ok.get('amount')+outflow_ok.get('amount'),
        "total_inflow": inflow_ok.get('amount'),
        "total_outflow": outflow_ok.get('amount'),
    }]
    balance_cashflow = {
        "inflow": {inflow_ok.get('category'): inflow_ok.get('amount')},
        "outflow": {outflow_ok.get('category'): outflow_ok.get('amount')},
    }

    def setUp(self):
        user = User.objects.create(id=1,name='test',email='test@test.com',age=18)
        tr1 = Transaction.objects.create(**self.inflow_ok)
        tr2 = Transaction.objects.create(**self.outflow_ok)

    def test_get_balance(self):
        # get API response
        response = self.client.get(reverse('transactions:balance-detail', kwargs={'user_id':1}),{}, format='json')
        self.assertEqual(response.data, self.balance_expected)
        self.assertEqual(response.status_code, status.HTTP_200_OK)

    def test_get_cashflow(self):
        # get API response
        response = self.client.get(reverse('transactions:cashflow-detail', kwargs={'user_id':1}),{}, format='json')
        self.assertEqual(response.data, self.balance_cashflow)
        self.assertEqual(response.status_code, status.HTTP_200_OK)