import os

import unittest

from django.conf import settings

from django.core.files.base import ContentFile

from django.test import TestCase

from models import *

# Path to sample image

RES_DIR = os.path.join(os.path.dirname(__file__), 'res')

LANDSCAPE_IMAGE_PATH = os.path.join(RES_DIR, 'test_landscape.jpg')

PORTRAIT_IMAGE_PATH = os.path.join(RES_DIR, 'test_portrait.jpg')

SQUARE_IMAGE_PATH = os.path.join(RES_DIR, 'test_square.jpg')

class TestPhoto(ImageModel):

    """ Minimal ImageModel class for testing """

    name = models.CharField(max_length=30)

class PLTest(TestCase):

    """ Base TestCase class """

    def setUp(self):

        self.s = PhotoSize(name='test', width=100, height=100)

        self.s.save()

        self.pl = TestPhoto(name='landscape')

        self.pl.image.save(os.path.basename(LANDSCAPE_IMAGE_PATH),

                           ContentFile(open(LANDSCAPE_IMAGE_PATH, 'rb').read()))

        self.pl.save()

    def tearDown(self):

        path = self.pl.image.path

        self.pl.delete()

        self.failIf(os.path.isfile(path))

        self.s.delete()

class PhotoTest(PLTest):

    def test_new_photo(self):

        self.assertEqual(TestPhoto.objects.count(), 1)

        self.failUnless(os.path.isfile(self.pl.image.path))

        self.assertEqual(os.path.getsize(self.pl.image.path),

                         os.path.getsize(LANDSCAPE_IMAGE_PATH))

    #def test_exif(self):

    #    self.assert_(len(self.pl.EXIF.keys()) > 0)

    def test_paths(self):

        self.assertEqual(os.path.normpath(str(self.pl.cache_path())).lower(),

                         os.path.normpath(os.path.join(settings.MEDIA_ROOT,

                                      PHOTOLOGUE_DIR,

                                      'photos',

                                      'cache')).lower())

        self.assertEqual(self.pl.cache_url(),

                         settings.MEDIA_URL + PHOTOLOGUE_DIR + '/photos/cache')

    def test_count(self):

        for i in range(5):

            self.pl.get_test_url()

        self.assertEquals(self.pl.view_count, 0)

        self.s.increment_count = True

        self.s.save()

        for i in range(5):

            self.pl.get_test_url()

        self.assertEquals(self.pl.view_count, 5)

    def test_precache(self):

        # set the thumbnail photo size to pre-cache

        self.s.pre_cache = True

        self.s.save()

        # make sure it created the file

        self.failUnless(os.path.isfile(self.pl.get_test_filename()))

        self.s.pre_cache = False

        self.s.save()

        # clear the cache and make sure the file's deleted

        self.pl.clear_cache()

        self.failIf(os.path.isfile(self.pl.get_test_filename()))

    def test_accessor_methods(self):

        self.assertEquals(self.pl.get_test_photosize(), self.s)

        self.assertEquals(self.pl.get_test_size(),

                          Image.open(self.pl.get_test_filename()).size)

        self.assertEquals(self.pl.get_test_url(),

                          self.pl.cache_url() + '/' + \

                          self.pl._get_filename_for_size(self.s))

        self.assertEquals(self.pl.get_test_filename(),

                          os.path.join(self.pl.cache_path(),

                          self.pl._get_filename_for_size(self.s)))

class ImageResizeTest(PLTest):

    def setUp(self):

        super(ImageResizeTest, self).setUp()

        self.pp = TestPhoto(name='portrait')

        self.pp.image.save(os.path.basename(PORTRAIT_IMAGE_PATH),

                           ContentFile(open(PORTRAIT_IMAGE_PATH, 'rb').read()))

        self.pp.save()

        self.ps = TestPhoto(name='square')

        self.ps.image.save(os.path.basename(SQUARE_IMAGE_PATH),

                           ContentFile(open(SQUARE_IMAGE_PATH, 'rb').read()))

        self.ps.save()

    def tearDown(self):

        super(ImageResizeTest, self).tearDown()

        self.pp.delete()

        self.ps.delete()

    def test_resize_to_fit(self):

        self.assertEquals(self.pl.get_test_size(), (100, 75))

        self.assertEquals(self.pp.get_test_size(), (75, 100))

        self.assertEquals(self.ps.get_test_size(), (100, 100))

    def test_resize_to_fit_width(self):

        self.s.size = (100, 0)

        self.s.save()

        self.assertEquals(self.pl.get_test_size(), (100, 75))

        self.assertEquals(self.pp.get_test_size(), (100, 133))

        self.assertEquals(self.ps.get_test_size(), (100, 100))

    def test_resize_to_fit_width_enlarge(self):

        self.s.size = (400, 0)

        self.s.upscale = True

        self.s.save()

        self.assertEquals(self.pl.get_test_size(), (400, 300))

        self.assertEquals(self.pp.get_test_size(), (400, 533))

        self.assertEquals(self.ps.get_test_size(), (400, 400))

    def test_resize_to_fit_height(self):

        self.s.size = (0, 100)

        self.s.save()

        self.assertEquals(self.pl.get_test_size(), (133, 100))

        self.assertEquals(self.pp.get_test_size(), (75, 100))

        self.assertEquals(self.ps.get_test_size(), (100, 100))

    def test_resize_to_fit_height_enlarge(self):

        self.s.size = (0, 400)

        self.s.upscale = True

        self.s.save()

        self.assertEquals(self.pl.get_test_size(), (533, 400))

        self.assertEquals(self.pp.get_test_size(), (300, 400))

        self.assertEquals(self.ps.get_test_size(), (400, 400))

    def test_resize_and_crop(self):

        self.s.crop = True

        self.s.save()

        self.assertEquals(self.pl.get_test_size(), self.s.size)

        self.assertEquals(self.pp.get_test_size(), self.s.size)

        self.assertEquals(self.ps.get_test_size(), self.s.size)

    def test_resize_rounding_to_fit(self):

        self.s.size = (113, 113)

        self.s.save()

        self.assertEquals(self.pl.get_test_size(), (113, 85))

        self.assertEquals(self.pp.get_test_size(), (85, 113))

        self.assertEquals(self.ps.get_test_size(), (113, 113))

    def test_resize_rounding_cropped(self):

        self.s.size = (113, 113)

        self.s.crop = True

        self.s.save()

        self.assertEquals(self.pl.get_test_size(), self.s.size)

        self.assertEquals(self.pp.get_test_size(), self.s.size)

        self.assertEquals(self.ps.get_test_size(), self.s.size)

    def test_resize_one_dimension_width(self):

        self.s.size = (100, 150)

        self.s.save()

        self.assertEquals(self.pl.get_test_size(), (100, 75))

    def test_resize_one_dimension_height(self):

        self.s.size = (200, 75)

        self.s.save()

        self.assertEquals(self.pl.get_test_size(), (100, 75))

    def test_resize_no_upscale(self):

        self.s.size = (1000, 1000)

        self.s.save()

        self.assertEquals(self.pl.get_test_size(), (200, 150))

    def test_resize_no_upscale_mixed_height(self):

        self.s.size = (400, 75)

        self.s.save()

        self.assertEquals(self.pl.get_test_size(), (100, 75))

    def test_resize_no_upscale_mixed_width(self):

        self.s.size = (100, 300)

        self.s.save()

        self.assertEquals(self.pl.get_test_size(), (100, 75))

    def test_resize_no_upscale_crop(self):

        self.s.size = (1000, 1000)

        self.s.crop = True

        self.s.save()

        self.assertEquals(self.pl.get_test_size(), (1000, 1000))

    def test_resize_upscale(self):

        self.s.size = (1000, 1000)

        self.s.upscale = True

        self.s.save()

        self.assertEquals(self.pl.get_test_size(), (1000, 750))

        self.assertEquals(self.pp.get_test_size(), (750, 1000))

        self.assertEquals(self.ps.get_test_size(), (1000, 1000))

class PhotoEffectTest(PLTest):

    def test(self):

        effect = PhotoEffect(name='test')

        im = Image.open(self.pl.image.path)

        self.assert_(isinstance(effect.pre_process(im), Image.Image))

        self.assert_(isinstance(effect.post_process(im), Image.Image))

        self.assert_(isinstance(effect.process(im), Image.Image))

class PhotoSizeCacheTest(PLTest):

    def test(self):

        cache = PhotoSizeCache()

        self.assertEqual(cache.sizes['test'], self.s)