from helper import hopper, unittest, PillowTestCase

from PIL import Image, PsdImagePlugin

# sample ppm stream
test_file = "Tests/images/hopper.psd"


class TestImagePsd(PillowTestCase):

    def test_sanity(self):
        im = Image.open(test_file)
        im.load()
        self.assertEqual(im.mode, "RGB")
        self.assertEqual(im.size, (128, 128))
        self.assertEqual(im.format, "PSD")

        im2 = hopper()
        self.assert_image_similar(im, im2, 4.8)

    def test_invalid_file(self):
        invalid_file = "Tests/images/flower.jpg"

        self.assertRaises(SyntaxError,
                          lambda: PsdImagePlugin.PsdImageFile(invalid_file))

    def test_n_frames(self):
        im = Image.open("Tests/images/hopper_merged.psd")
        self.assertEqual(im.n_frames, 1)
        self.assertFalse(im.is_animated)

        im = Image.open(test_file)
        self.assertEqual(im.n_frames, 2)
        self.assertTrue(im.is_animated)

    def test_eoferror(self):
        im = Image.open(test_file)

        n_frames = im.n_frames
        while True:
            n_frames -= 1
            try:
                # PSD seek index starts at 1 rather than 0
                im.seek(n_frames+1)
                break
            except EOFError:
                self.assertTrue(im.tell() < n_frames)

    def test_seek_tell(self):
        im = Image.open(test_file)

        layer_number = im.tell()
        self.assertEqual(layer_number, 0)

        im.seek(0)
        layer_number = im.tell()
        self.assertEqual(layer_number, 0)

        im.seek(1)
        layer_number = im.tell()
        self.assertEqual(layer_number, 1)

        im.seek(2)
        layer_number = im.tell()
        self.assertEqual(layer_number, 2)

    def test_seek_eoferror(self):
        im = Image.open(test_file)

        self.assertRaises(EOFError, lambda: im.seek(-1))

    def test_icc_profile(self):
        im = Image.open(test_file)
        self.assertIn("icc_profile", im.info)

        icc_profile = im.info["icc_profile"]
        self.assertEqual(len(icc_profile), 3144)

    def test_no_icc_profile(self):
        im = Image.open("Tests/images/hopper_merged.psd")

        self.assertNotIn("icc_profile", im.info)


if __name__ == '__main__':
    unittest.main()