"""
    unittest for setup_utils
    ~~~~~~~~~~~~~~~~~~~~~~~~

    https://github.com/jedie/python-creole/wiki/Use-In-Setup

    :copyleft: 2011-2020 by python-creole team, see AUTHORS for more details.
    :license: GNU GPL v3 or above, see LICENSE for more details.
"""
import difflib
import filecmp
import os
import shutil
import tempfile
from pathlib import Path

from creole.setup_utils import get_long_description, update_creole_rst_readme
from creole.tests.constants import CREOLE_PACKAGE_ROOT
from creole.tests.utils.base_unittest import BaseCreoleTest
from creole.tests.utils.utils import IsolatedFilesystem


TEST_README_DIR = Path(__file__).parent
TEST_README_FILENAME = "test_README.creole"


class SetupUtilsTests(BaseCreoleTest):
    def test_creole_package_path(self):
        self.assertTrue(
            os.path.isdir(CREOLE_PACKAGE_ROOT),
            f"CREOLE_PACKAGE_ROOT {CREOLE_PACKAGE_ROOT!r} is not a existing direcotry!"
        )
        filepath = os.path.join(CREOLE_PACKAGE_ROOT, "README.creole")
        self.assertTrue(
            os.path.isfile(filepath),
            f"README file {filepath!r} not found!"
        )

    def test_get_long_description_without_raise_errors(self):
        long_description = get_long_description(CREOLE_PACKAGE_ROOT, raise_errors=False)
        self.assertIn("===================\nabout python-creole\n===================\n\n", long_description)
        # Test created ReSt code
        from creole.rest_tools.clean_writer import rest2html
        html = rest2html(long_description)
        self.assertIn("<h1>about python-creole</h1>\n", html)

    def test_get_long_description_with_raise_errors(self):
        long_description = get_long_description(CREOLE_PACKAGE_ROOT, raise_errors=True)
        self.assertIn("===================\nabout python-creole\n===================\n\n", long_description)

    def _tempfile(self, content):
        fd = tempfile.NamedTemporaryFile()
        path, filename = os.path.split(fd.name)

        fd.write(content)
        fd.seek(0)
        return path, filename, fd

    def test_tempfile_without_error(self):
        path, filename, fd = self._tempfile(b"== noerror ==")
        try:
            long_description = get_long_description(path, filename, raise_errors=True)
            self.assertEqual(long_description, "-------\nnoerror\n-------")
        finally:
            fd.close()

    def test_get_long_description_error_handling(self):
        """
        Test if get_long_description will raised a error, if description
        produce a ReSt error.

        We test with this error:
        <string>:102: (ERROR/3) Document or section may not begin with a transition.
        """
        path, filename, fd = self._tempfile(b"----")
        try:
            self.assertRaises(SystemExit, get_long_description, path, filename, raise_errors=True)
        finally:
            fd.close()

    def test_get_long_description_error_handling2(self):
        """
        Test if get_long_description will raised a error, if description
        produce a ReSt error.

        We test with this error:
        SystemExit: ReSt2html error: link scheme not allowed
        """
        path, filename, fd = self._tempfile(b"[[foo://bar]]")
#         print(get_long_description(path, filename, raise_errors=True))
        try:
            self.assertRaises(SystemExit, get_long_description, path, filename, raise_errors=True)
        finally:
            fd.close()

    def test_wrong_path_without_raise_errors(self):
        self.assertEqual(
            get_long_description("wrong/path", raise_errors=False).replace("u'", "'"),
            "[Error: [Errno 2] No such file or directory: 'wrong/path/README.creole']\n"
        )

    def test_wrong_path_with_raise_errors(self):
        self.assertRaises(IOError, get_long_description, "wrong/path", raise_errors=True)

    def test_readme_encoding(self):
        long_description = get_long_description(TEST_README_DIR, filename=TEST_README_FILENAME, raise_errors=True)
        self.assertTrue(isinstance(long_description, str))

        txt = "German Umlaute: ä ö ü ß Ä Ö Ü"
        self.assertIn(txt, long_description)


def test_update_rst_readme():
    with IsolatedFilesystem(prefix="temp_dir_prefix"):
        old_rest_readme_path = Path(Path().cwd(), 'README.rst')
        shutil.copy(
            Path(CREOLE_PACKAGE_ROOT, 'README.rst'),
            old_rest_readme_path
        )
        try:
            rest_readme_path = update_creole_rst_readme()
            assert str(rest_readme_path.relative_to(CREOLE_PACKAGE_ROOT)) == 'README.rst'

            if filecmp.cmp(rest_readme_path, old_rest_readme_path, shallow=False) is True:
                return

            # On CI the file modification time maybe not the same.
            # So skip the last line and compare again.

            with old_rest_readme_path.open('r') as f:
                from_file = [line.rstrip() for line in f][:-1]

            with rest_readme_path.open('r') as f:
                to_file = [line.rstrip() for line in f][:-1]

            if from_file == to_file:
                return

            diff = '\n'.join(
                line
                for line in difflib.Differ().compare(from_file, to_file)
                if line[0] != ' '
            )
            raise AssertionError(f'README.rst is not up-to-date:\n{diff}')
        finally:
            # restore the origin file
            shutil.copy(
                old_rest_readme_path,
                Path(CREOLE_PACKAGE_ROOT, 'README.rst'),
            )