# coding=utf-8
"""
Tests capa util
"""


import unittest

import ddt
from lxml import etree

from xmodule.capa.tests.helpers import test_capa_system
from xmodule.capa.util import (
    compare_with_tolerance,
    contextualize_text,
    get_inner_html_from_xpath,
    remove_markup,
    sanitize_html
)


@ddt.ddt
class UtilTest(unittest.TestCase):
    """Tests for util"""

    def setUp(self):
        super(UtilTest, self).setUp()  # lint-amnesty, pylint: disable=super-with-arguments
        self.system = test_capa_system()

    def test_compare_with_tolerance(self):  # lint-amnesty, pylint: disable=too-many-statements
        # Test default tolerance '0.001%' (it is relative)
        result = compare_with_tolerance(100.0, 100.0)
        assert result
        result = compare_with_tolerance(100.001, 100.0)
        assert result
        result = compare_with_tolerance(101.0, 100.0)
        assert not result
        # Test absolute percentage tolerance
        result = compare_with_tolerance(109.9, 100.0, '10%', False)
        assert result
        result = compare_with_tolerance(110.1, 100.0, '10%', False)
        assert not result
        # Test relative percentage tolerance
        result = compare_with_tolerance(111.0, 100.0, '10%', True)
        assert result
        result = compare_with_tolerance(112.0, 100.0, '10%', True)
        assert not result
        # Test absolute tolerance (string)
        result = compare_with_tolerance(109.9, 100.0, '10.0', False)
        assert result
        result = compare_with_tolerance(110.1, 100.0, '10.0', False)
        assert not result
        # Test relative tolerance (string)
        result = compare_with_tolerance(111.0, 100.0, '0.1', True)
        assert result
        result = compare_with_tolerance(112.0, 100.0, '0.1', True)
        assert not result
        # Test absolute tolerance (float)
        result = compare_with_tolerance(109.9, 100.0, 10.0, False)
        assert result
        result = compare_with_tolerance(110.1, 100.0, 10.0, False)
        assert not result
        # Test relative tolerance (float)
        result = compare_with_tolerance(111.0, 100.0, 0.1, True)
        assert result
        result = compare_with_tolerance(112.0, 100.0, 0.1, True)
        assert not result
        ##### Infinite values #####
        infinity = float('Inf')
        # Test relative tolerance (float)
        result = compare_with_tolerance(infinity, 100.0, 1.0, True)
        assert not result
        result = compare_with_tolerance(100.0, infinity, 1.0, True)
        assert not result
        result = compare_with_tolerance(infinity, infinity, 1.0, True)
        assert result
        # Test absolute tolerance (float)
        result = compare_with_tolerance(infinity, 100.0, 1.0, False)
        assert not result
        result = compare_with_tolerance(100.0, infinity, 1.0, False)
        assert not result
        result = compare_with_tolerance(infinity, infinity, 1.0, False)
        assert result
        # Test relative tolerance (string)
        result = compare_with_tolerance(infinity, 100.0, '1.0', True)
        assert not result
        result = compare_with_tolerance(100.0, infinity, '1.0', True)
        assert not result
        result = compare_with_tolerance(infinity, infinity, '1.0', True)
        assert result
        # Test absolute tolerance (string)
        result = compare_with_tolerance(infinity, 100.0, '1.0', False)
        assert not result
        result = compare_with_tolerance(100.0, infinity, '1.0', False)
        assert not result
        result = compare_with_tolerance(infinity, infinity, '1.0', False)
        assert result
        # Test absolute tolerance for smaller values
        result = compare_with_tolerance(100.01, 100.0, 0.01, False)
        assert result
        result = compare_with_tolerance(100.001, 100.0, 0.001, False)
        assert result
        result = compare_with_tolerance(100.01, 100.0, '0.01%', False)
        assert result
        result = compare_with_tolerance(100.002, 100.0, 0.001, False)
        assert not result
        result = compare_with_tolerance(0.4, 0.44, 0.01, False)
        assert not result
        result = compare_with_tolerance(100.01, 100.0, 0.010, False)
        assert result

        # Test complex_number instructor_complex
        result = compare_with_tolerance(0.4, complex(0.44, 0), 0.01, False)
        assert not result
        result = compare_with_tolerance(100.01, complex(100.0, 0), 0.010, False)
        assert result
        result = compare_with_tolerance(110.1, complex(100.0, 0), '10.0', False)
        assert not result
        result = compare_with_tolerance(111.0, complex(100.0, 0), '10%', True)
        assert result

    def test_sanitize_html(self):
        """
        Test for html sanitization with nh3.
        """
        allowed_tags = ['div', 'p', 'audio', 'pre', 'span']
        for tag in allowed_tags:
            queue_msg = "<{0}>Test message</{0}>".format(tag)
            assert sanitize_html(queue_msg) == queue_msg

        not_allowed_tag = 'script'
        queue_msg = "<{0}>Test message</{0}>".format(not_allowed_tag)
        expected = ""
        assert sanitize_html(queue_msg) == expected

    def test_get_inner_html_from_xpath(self):
        """
        Test for getting inner html as string from xpath node.
        """
        xpath_node = etree.XML('<hint style="smtng">aa<a href="#">bb</a>cc</hint>')
        assert get_inner_html_from_xpath(xpath_node) == 'aa<a href="#">bb</a>cc'

    def test_remove_markup(self):
        """
        Test for markup removal with nh3.
        """
        assert remove_markup('The <mark>Truth</mark> is <em>Out There</em> & you need to <strong>find</strong> it') ==\
               'The Truth is Out There &amp; you need to find it'

    @ddt.data(
        'When the root level failš the whole hierarchy won’t work anymore.',
        'あなたあなたあなた'
    )
    def test_contextualize_text(self, context_value):
        """Verify that variable substitution works as intended with non-ascii characters."""
        key = 'answer0'
        text = '$answer0'
        context = {key: context_value}
        contextual_text = contextualize_text(text, context)
        assert context_value == contextual_text

    def test_contextualize_text_with_non_ascii_context(self):
        """Verify that variable substitution works as intended with non-ascii characters."""
        key = 'あなた$a $b'
        text = '$' + key
        context = {'a': 'あなたあなたあなた', 'b': 'あなたhi'}
        expected_text = '$あなたあなたあなたあなた あなたhi'
        contextual_text = contextualize_text(text, context)
        assert expected_text == contextual_text