from PIL import Image, PsdImagePlugin

from .helper import PillowTestCase, hopper

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_unclosed_file(self):
        def open():
            im = Image.open(test_file)
            im.load()

        self.assert_warning(None, open)

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

        self.assertRaises(SyntaxError, 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)
        # PSD seek index starts at 1 rather than 0
        n_frames = im.n_frames + 1

        # Test seeking past the last frame
        self.assertRaises(EOFError, im.seek, n_frames)
        self.assertLess(im.tell(), n_frames)

        # Test that seeking to the last frame does not raise an error
        im.seek(n_frames - 1)

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

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

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

    def test_open_after_exclusive_load(self):
        im = Image.open(test_file)
        im.load()
        im.seek(im.tell() + 1)
        im.load()

    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)