import os
import mock
import tempfile

from django.test import TestCase
from django.test.utils import override_settings
from django.conf import settings

from scss import config
from django_pyscss.scss import DjangoScss

from tests.utils import clean_css, CollectStaticTestCase


with open(os.path.join(settings.BASE_DIR, 'testproject', 'static', 'css', 'foo.scss')) as f:
    FOO_CONTENTS = f.read()

with open(os.path.join(settings.BASE_DIR, 'testapp1', 'static', 'css', 'app1.scss')) as f:
    APP1_CONTENTS = f.read()

APP2_CONTENTS = FOO_CONTENTS + APP1_CONTENTS

SASS_CONTENTS = """
.sass {
  color: #009900;
}
"""

with open(os.path.join(settings.BASE_DIR, 'testproject', 'static', 'css', 'css_file.css')) as f:
    CSS_CONTENTS = f.read()

with open(os.path.join(settings.BASE_DIR, 'testproject', 'static', 'css', '_baz.scss')) as f:
    BAZ_CONTENTS = f.read()

with open(os.path.join(settings.BASE_DIR, 'testproject', 'static', 'css', 'path_conflict.scss')) as f:
    PATH_CONFLICT_CONTENTS = f.read()


class CompilerTestMixin(object):
    def setUp(self):
        self.compiler = DjangoScss(scss_opts={
            # No compress so that I can compare more easily
            'compress': 0,
        })
        super(CompilerTestMixin, self).setUp()


class ImportTestMixin(CompilerTestMixin):
    def test_import_from_staticfiles_dirs(self):
        actual = self.compiler.compile(scss_string='@import "/css/foo.scss";')
        self.assertEqual(clean_css(actual), clean_css(FOO_CONTENTS))

    def test_import_from_staticfiles_dirs_prefixed(self):
        actual = self.compiler.compile(scss_string='@import "/css_prefix/baz.scss";')
        self.assertEqual(clean_css(actual), clean_css(FOO_CONTENTS))

    def test_import_from_staticfiles_dirs_relative(self):
        actual = self.compiler.compile(scss_string='@import "css/foo.scss";')
        self.assertEqual(clean_css(actual), clean_css(FOO_CONTENTS))

    def test_import_from_app(self):
        actual = self.compiler.compile(scss_string='@import "/css/app1.scss";')
        self.assertEqual(clean_css(actual), clean_css(APP1_CONTENTS))

    def test_import_from_app_relative(self):
        actual = self.compiler.compile(scss_string='@import "css/app1.scss";')
        self.assertEqual(clean_css(actual), clean_css(APP1_CONTENTS))

    def test_imports_within_file(self):
        actual = self.compiler.compile(scss_string='@import "/css/app2.scss";')
        self.assertEqual(clean_css(actual), clean_css(APP2_CONTENTS))

    def test_relative_import(self):
        actual = self.compiler.compile(scss_file='/css/bar.scss')
        self.assertEqual(clean_css(actual), clean_css(FOO_CONTENTS))

    def test_bad_import(self):
        actual = self.compiler.compile(scss_string='@import "this-file-does-not-and-should-never-exist.scss";')
        self.assertEqual(clean_css(actual), '')

    def test_no_extension_import(self):
        actual = self.compiler.compile(scss_string='@import "/css/foo";')
        self.assertEqual(clean_css(actual), clean_css(FOO_CONTENTS))

    def test_no_extension_import_sass(self):
        actual = self.compiler.compile(scss_string='@import "/css/sass_file";')
        self.assertEqual(clean_css(actual), clean_css(SASS_CONTENTS))

    def test_no_extension_import_css(self):
        actual = self.compiler.compile(scss_string='@import "/css/css_file";')
        self.assertEqual(clean_css(actual), clean_css(CSS_CONTENTS))

    def test_import_underscore_file(self):
        actual = self.compiler.compile(scss_string='@import "/css/baz";')
        self.assertEqual(clean_css(actual), clean_css(BAZ_CONTENTS))

    def test_import_conflict(self):
        actual = self.compiler.compile(scss_string='@import "/css/path_conflict";')
        self.assertEqual(clean_css(actual), clean_css(PATH_CONFLICT_CONTENTS))


@override_settings(DEBUG=True)
class FindersImportTest(ImportTestMixin, TestCase):
    pass


@override_settings(DEBUG=False)
class StorageImportTest(ImportTestMixin, CollectStaticTestCase):
    pass


INLINE_IMAGE = """
.loading {
  background: inline_image('images/loading.gif') center no-repeat;
}
"""

INLINED_IMAGE_EXPECTED = """
.loading {
  background: url(data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAABs0lEQVR4nKXTzUojQRDA8X9/zJCIECRfiDCDBHKZq+QR8nJ5Hl/AQ2QgxyCOoCAy8eIkAxLy0dPWnkzQ7JpdtqAv3fSP6qouJSL8T9jvGy8vLzKdTsmyjDzPGY1G6q+B29tbubm5YTab4b3n4+Njd1ZVlYgIWmuMMeoASNNUrq+vWa/XDAYDkiTh8vJyByil8N7jnCMMQ7HWqh2Q57mMx2OccwyHQ4bD4UHaxhglIuKcY71eU6/XxRijNMDDwwNFUXB1dfXby7t0rVVaa5xzbDYbADTA8/MzWmuSJPmpXp8IVVXtAAtQFAVBEBBF0VEgDENVVZV47/eA1hprLUr92DEAvPfinENrvX/C+fk5QRAwm82OAqvVCuccxpg9EMcxxhienp6OAmVZst1uCcNwD/R6PbrdLo+Pj0wmkz/+7dfXV3l7e8Nay8nJCQDqcxbu7u4kTVNEhH6/TxzHdDodlFKUZclisWA+n1Or1YiiiGazqb4AAPf395JlGe/v71hrCcPwy2o0GlxcXNDpdHbVVt+ncT6fS57nFEXBcrkkCALOzs5otVq0221OT0+/tOoA+Nf4BawEx9v4UlbsAAAAAElFTkSuQmCC) center no-repeat;
}
"""

SPRITE_MAP = """
$widgets: sprite-map('images/icons/widget-*.png');

.foo {
  background: sprite($widgets, 'widget-skull-and-crossbones');
}

.bar {
  background: sprite($widgets, 'widget-google-map');
}
"""


class AssetsTest(CompilerTestMixin, TestCase):
    def test_inline_image(self):
        actual = self.compiler.compile(scss_string=INLINE_IMAGE)
        self.assertEqual(clean_css(actual), clean_css(INLINED_IMAGE_EXPECTED))

    def test_sprite_images(self):
        actual = self.compiler.compile(scss_string=SPRITE_MAP)
        # pyScss puts a cachebuster query string on the end of the URLs, lets
        # just check that it made the file that we expected.
        self.assertIn('KUZdBAnPCdlG5qfocw9GYw.png', actual)

    def test_mkdir_race_condition(self):
        """
        There is a race condition when different instances of DjangoScss are
        instantiated in different threads.

        See https://github.com/fusionbox/django-pyscss/issues/23

        We simulate the race condition by mocking the return of os.path.exists.
        """
        old_assets_root = config.ASSETS_ROOT
        try:
            new_assets_root = tempfile.mkdtemp()
            config.ASSETS_ROOT = new_assets_root

            def return_false_once(*args, **kwargs):
                patch.stop()
                return False

            patch = mock.patch('os.path.exists', new=return_false_once)
            patch.start()
            self.compiler.compile(scss_string=".test { color: red; }")
        finally:
            config.ASSETS_ROOT = old_assets_root
            os.rmdir(new_assets_root)