import os
import tempfile
import Image
from django.core.files.base import ContentFile
from django.db import models
from django.test import TestCase
from imagekit.models import ImageSpec, AdminThumbnailView
from imagekit.processors.resize import Crop
from imagekit.processors import Adjust



class Photo(models.Model):
    original_image = models.ImageField(upload_to='photos')
    thumbnail = ImageSpec([Adjust(contrast=1.2, sharpness=1.1), Crop(50, 50)],
            image_field='original_image', format='JPEG', quality=90)
    admin_thumbnail_view = AdminThumbnailView(image_field='thumbnail')
    

class IKTest(TestCase):
    """ Base TestCase class """
    def generate_image(self):
        tmp = tempfile.TemporaryFile()
        Image.new('RGB', (800, 600)).save(tmp, 'JPEG')
        tmp.seek(0)
        return tmp
    
    def setUp(self):
        self.photo = Photo()
        img = self.generate_image()
        file = ContentFile(img.read())
        self.photo.original_image = file
        self.photo.original_image.save('test.jpeg', file)
        self.photo.save()
        img.close()
    
    def test_save_image(self):
        photo = Photo.objects.get(id=self.photo.id)
        self.assertTrue(os.path.isfile(photo.original_image.path))
        
    def test_setup(self):
        self.assertEqual(self.photo.original_image.width, 800)
        self.assertEqual(self.photo.original_image.height, 600)
    
    def test_thumbnail_creation(self):
        photo = Photo.objects.get(id=self.photo.id)
        self.assertTrue(os.path.isfile(photo.thumbnail.file.name))

    def test_thumbnail_size(self):
        self.assertEqual(self.photo.thumbnail.width, 50)
        self.assertEqual(self.photo.thumbnail.height, 50)
    
    def test_thumbnail_source_file(self):
        self.assertEqual(
            self.photo.thumbnail.source_file, self.photo.original_image)