from django.test import TestCase
from django.urls import resolve
from lists.views import home_page
from django.http import HttpRequest, response
from django.template.loader import render_to_string
from lists.views import home_page
from lists.models import Item

class HomePageTest(TestCase):

    def test_uses_home_template(self):
        response = self.client.get('/')
        self.assertTemplateUsed(response,'home.html')
    
    def test_can_save_a_POST_request(self):
        self.client.post('/',data={'item_text': 'A new list item'})

        self.assertEqual(Item.objects.count(),1)
        new_item=Item.objects.first()
        self.assertEqual(new_item.text,'A new list item')

    def test_redirects_after_POST(self):
        response = self.client.post('/',data={'item_text': 'A new list item'})   
        self.assertEqual(response.status_code,302)
        self.assertEqual(response['location'],'/')

    def test_only_saves_items_when_necessary(self):
        self.client.get('/')
        self.assertEqual(Item.objects.count(),0)
    
    def test_displacys_all_list_items(self):
        Item.objects.create(text='itemey 1')
        Item.objects.create(text='itemey 2')
    
        response=self.client.get('/')

        self.assertIn('itemey 1',response.content.decode())
        self.assertIn('itemey 2',response.content.decode())
           
     
class ItemModelTest(TestCase):
    def test_saving_and_retrieving_items(self):
        first_item =Item()
        first_item.text='The first (ever) list item '
        first_item.save()

        second_item=Item()
        second_item.text='Item the second'
        second_item.save()

        saved_items =Item.objects.all()
        self.assertEqual(saved_items.count(),2)

        first_saved_item =saved_items[0]
        second_saved_item=saved_items[1]
        self.assertEqual(first_saved_item.text,'The first (ever) list item ')
        self.assertEqual(second_saved_item.text,'Item the second')

        