import unittest

from nbxmpp.stringprep import nodeprep
from nbxmpp.stringprep import saslprep
from nbxmpp.stringprep import resourceprep
from nbxmpp.stringprep import nameprep
from nbxmpp.stringprep import check_bidi


class TestBidi(unittest.TestCase):
    def test_empty_string(self):
        check_bidi('')

    def test_L_RAL_violation(self):
        with self.assertRaises(ValueError):
            check_bidi('\u05be\u0041')


class TestNodeprep(unittest.TestCase):
    def test_map_to_nothing(self):
        self.assertEqual(
            'ix',
            nodeprep('I\u00ADX'),
            'Nodeprep requirement: map SOFT HYPHEN to nothing')

    def test_case_fold(self):
        self.assertEqual(
            'ssa',
            nodeprep('ßA'),
            'Nodeprep requirement: map ß to ss, A to a')

    def test_nfkc(self):
        self.assertEqual(
            'a',
            nodeprep('\u00AA'),
            'Nodeprep requirement: NFKC')
        self.assertEqual(
            'ix',
            nodeprep('\u2168'),
            'Nodeprep requirement: NFKC')

    def test_prohibited_character(self):
        with self.assertRaisesRegex(
                ValueError,
                r'U\+0007',
                msg='Nodeprep requirement: prohibited character (C.2.1)'):
            nodeprep('\u0007')

        with self.assertRaisesRegex(
                ValueError,
                r'U\+200e',
                msg='Nodeprep requirement: prohibited character (C.8)'):
            nodeprep('\u200E')

        with self.assertRaisesRegex(
                ValueError,
                r'U\+003e',
                msg='Nodeprep requirement: prohibited character (custom)'):
            nodeprep('>')

    def test_unassigned(self):
        with self.assertRaises(
                ValueError,
                msg='Nodeprep requirement: unassigned'):
            nodeprep('\u0221', allow_unassigned=False)

        with self.assertRaises(
                ValueError,
                msg='enforce no unassigned by default'):
            nodeprep('\u0221')

        self.assertEqual(
            '\u0221',
            nodeprep('\u0221', allow_unassigned=True))


class TestNameprep(unittest.TestCase):
    def test_map_to_nothing(self):
        self.assertEqual(
            'ix',
            nameprep('I\u00ADX'),
            'Nameprep requirement: map SOFT HYPHEN to nothing')

    def test_case_fold(self):
        self.assertEqual(
            'ssa',
            nameprep('ßA'),
            'Nameprep requirement: map ß to ss, A to a')

    def test_nfkc(self):
        self.assertEqual(
            'a',
            nodeprep('\u00AA'),
            'Nameprep requirement: NFKC')
        self.assertEqual(
            'ix',
            nodeprep('\u2168'),
            'Nameprep requirement: NFKC')

    def test_prohibited_character(self):
        with self.assertRaisesRegex(
                ValueError,
                r'U\+06dd',
                msg='Nameprep requirement: prohibited character (C.2.2)'):
            nameprep('\u06DD')

        with self.assertRaisesRegex(
                ValueError,
                r'U\+e000',
                msg='Nameprep requirement: prohibited character (C.3)'):
            nameprep('\uE000')

        with self.assertRaisesRegex(
                ValueError,
                r'U\+1fffe',
                msg='Nameprep requirement: prohibited character (C.4)'):
            nameprep('\U0001FFFE')

        with self.assertRaisesRegex(
                ValueError,
                r'U\+d800',
                msg='Nameprep requirement: prohibited character (C.5)'):
            nameprep('\uD800')

        with self.assertRaisesRegex(
                ValueError,
                r'U\+fff9',
                msg='Nameprep requirement: prohibited character (C.6)'):
            nameprep('\uFFF9')

        with self.assertRaisesRegex(
                ValueError,
                r'U\+2ff0',
                msg='Nameprep requirement: prohibited character (C.7)'):
            nameprep('\u2FF0')

        with self.assertRaisesRegex(
                ValueError,
                r'U\+e0001',
                msg='Nameprep requirement: prohibited character (C.9)'):
            nameprep('\U000E0001')

    def test_unassigned(self):
        with self.assertRaises(
                ValueError,
                msg='Nameprep requirement: unassigned'):
            nameprep('\u0221', allow_unassigned=False)

        with self.assertRaises(
                ValueError,
                msg='enforce no unassigned by default'):
            nameprep('\u0221')

        self.assertEqual(
            '\u0221',
            nameprep('\u0221', allow_unassigned=True))


class TestResourceprep(unittest.TestCase):
    def test_map_to_nothing(self):
        self.assertEqual(
            'IX',
            resourceprep('I\u00ADX'),
            'Resourceprep requirement: map SOFT HYPHEN to nothing')

    def test_nfkc(self):
        self.assertEqual(
            'a',
            resourceprep('\u00AA'),
            'Resourceprep requirement: NFKC')
        self.assertEqual(
            'IX',
            resourceprep('\u2168'),
            'Resourceprep requirement: NFKC')

    def test_prohibited_character(self):
        with self.assertRaisesRegex(
                ValueError,
                r'U\+0007',
                msg='Resourceprep requirement: '
                    'prohibited character (C.2.1)'):
            resourceprep('\u0007')

        with self.assertRaisesRegex(
                ValueError,
                r'U\+200e',
                msg='Resourceprep requirement: '
                    'prohibited character (C.8)'):
            resourceprep('\u200E')

    def test_unassigned(self):
        with self.assertRaises(
                ValueError,
                msg='Resourceprep requirement: unassigned'):
            resourceprep('\u0221', allow_unassigned=False)

        with self.assertRaises(
                ValueError,
                msg='enforce no unassigned by default'):
            resourceprep('\u0221')

        self.assertEqual(
            '\u0221',
            resourceprep('\u0221', allow_unassigned=True))


class TestSASLprep(unittest.TestCase):
    def test_map_to_nothing(self):
        self.assertEqual(
            'IX',
            saslprep('I\u00ADX'),
            'SASLprep requirement: map SOFT HYPHEN to nothing')

    def test_nfkc(self):
        self.assertEqual(
            'a',
            saslprep('\u00AA'),
            'SASLprep requirement: NFKC')
        self.assertEqual(
            'IX',
            saslprep('\u2168'),
            'SASLprep requirement: NFKC')

    def test_case_fold(self):
        self.assertNotEqual(
            'user',
            saslprep('USER'),
            'SASLprep requirement: No CaseFold')

    def test_prohibited_character(self):
        with self.assertRaisesRegex(
                ValueError,
                r'U\+0007',
                msg='SASLprep requirement: '
                    'prohibited character (C.2.1)'):
            saslprep('\u0007')

    def test_bidi_check(self):
        with self.assertRaises(
                ValueError,
                msg='SASLprep requirement: bidi check'):
            saslprep('\u0627\u0031')

    def test_unassigned(self):
        with self.assertRaises(
                ValueError,
                msg='SASLprep requirement: unassigned'):
            saslprep('\u0221', allow_unassigned=False)

        with self.assertRaises(
                ValueError,
                msg='enforce no unassigned by default'):
            saslprep('\u0221')

        self.assertEqual(
            '\u0221',
            saslprep('\u0221', allow_unassigned=True))