# This file is part of beets.
# Copyright 2015, Thomas Scholtes.
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.

from __future__ import (division, absolute_import, print_function,
                        unicode_literals)

import os.path
from mock import Mock, patch

from test import _common
from test._common import unittest
from test.helper import TestHelper, capture_log

from beets.mediafile import MediaFile
from beets import config, logging
from beets.util import syspath
from beets.util.artresizer import ArtResizer
from beetsplug.embedart import EmbedCoverArtPlugin


def require_artresizer_compare(test):

    def wrapper(*args, **kwargs):
        if not ArtResizer.shared.can_compare:
            raise unittest.SkipTest()
        else:
            return test(*args, **kwargs)

    wrapper.__name__ = test.__name__
    return wrapper


class EmbedartCliTest(unittest.TestCase, TestHelper):

    small_artpath = os.path.join(_common.RSRC, 'image-2x3.jpg')
    abbey_artpath = os.path.join(_common.RSRC, 'abbey.jpg')
    abbey_similarpath = os.path.join(_common.RSRC, 'abbey-similar.jpg')
    abbey_differentpath = os.path.join(_common.RSRC, 'abbey-different.jpg')

    def setUp(self):
        self.setup_beets()  # Converter is threaded
        self.load_plugins('embedart')

    def _setup_data(self, artpath=None):
        if not artpath:
            artpath = self.small_artpath
        with open(syspath(artpath)) as f:
            self.image_data = f.read()

    def tearDown(self):
        self.unload_plugins()
        self.teardown_beets()

    def test_embed_art_from_file(self):
        self._setup_data()
        album = self.add_album_fixture()
        item = album.items()[0]
        self.run_command('embedart', '-f', self.small_artpath)
        mediafile = MediaFile(syspath(item.path))
        self.assertEqual(mediafile.images[0].data, self.image_data)

    def test_embed_art_from_album(self):
        self._setup_data()
        album = self.add_album_fixture()
        item = album.items()[0]
        album.artpath = self.small_artpath
        album.store()
        self.run_command('embedart')
        mediafile = MediaFile(syspath(item.path))
        self.assertEqual(mediafile.images[0].data, self.image_data)

    def test_art_file_missing(self):
        self.add_album_fixture()
        logging.getLogger('beets.embedart').setLevel(logging.DEBUG)
        with capture_log('beets.embedart') as logs:
            self.run_command('embedart', '-f', '/doesnotexist')
        self.assertIn(u'could not read image file:', ''.join(logs))

    @require_artresizer_compare
    def test_reject_different_art(self):
        self._setup_data(self.abbey_artpath)
        album = self.add_album_fixture()
        item = album.items()[0]
        self.run_command('embedart', '-f', self.abbey_artpath)
        config['embedart']['compare_threshold'] = 20
        self.run_command('embedart', '-f', self.abbey_differentpath)
        mediafile = MediaFile(syspath(item.path))

        self.assertEqual(mediafile.images[0].data, self.image_data,
                         'Image written is not {0}'.format(
                         self.abbey_artpath))

    @require_artresizer_compare
    def test_accept_similar_art(self):
        self._setup_data(self.abbey_similarpath)
        album = self.add_album_fixture()
        item = album.items()[0]
        self.run_command('embedart', '-f', self.abbey_artpath)
        config['embedart']['compare_threshold'] = 20
        self.run_command('embedart', '-f', self.abbey_similarpath)
        mediafile = MediaFile(syspath(item.path))

        self.assertEqual(mediafile.images[0].data, self.image_data,
                         'Image written is not {0}'.format(
                         self.abbey_similarpath))


class EmbedartTest(unittest.TestCase):
    @patch('beetsplug.embedart.subprocess')
    def test_imagemagick_response(self, mock_subprocess):
        embed = EmbedCoverArtPlugin()
        embed.extract = Mock(return_value=True)
        proc = mock_subprocess.Popen.return_value

        # everything is fine
        proc.returncode = 0
        proc.communicate.return_value = "10", "tagada"
        self.assertTrue(embed.check_art_similarity(None, None, 20))
        self.assertFalse(embed.check_art_similarity(None, None, 5))

        # small failure
        proc.returncode = 1
        proc.communicate.return_value = "tagada", "10"
        self.assertTrue(embed.check_art_similarity(None, None, 20))
        self.assertFalse(embed.check_art_similarity(None, None, 5))

        # bigger failure
        proc.returncode = 2
        self.assertIsNone(embed.check_art_similarity(None, None, 20))

        # IM result parsing problems
        proc.returncode = 0
        proc.communicate.return_value = "foo", "bar"
        self.assertIsNone(embed.check_art_similarity(None, None, 20))

        proc.returncode = 1
        self.assertIsNone(embed.check_art_similarity(None, None, 20))


def suite():
    return unittest.TestLoader().loadTestsFromName(__name__)

if __name__ == b'__main__':
    unittest.main(defaultTest='suite')