"""Tests for the flake8.style_guide.StyleGuide class."""
import optparse

from flake8 import style_guide

import pytest


def create_options(**kwargs):
    """Create and return an instance of optparse.Values."""
    kwargs.setdefault('select', [])
    kwargs.setdefault('ignore', [])
    return optparse.Values(kwargs)


@pytest.mark.parametrize('ignore_list,error_code', [
    (['E111', 'E121'], 'E111'),
    (['E111', 'E121'], 'E121'),
    (['E11', 'E12'], 'E121'),
    (['E2', 'E12'], 'E121'),
    (['E2', 'E12'], 'E211'),
])
def test_is_user_ignored_ignores_errors(ignore_list, error_code):
    """Verify we detect users explicitly ignoring an error."""
    guide = style_guide.StyleGuide(create_options(ignore=ignore_list),
                                   arguments=[],
                                   checker_plugins=None,
                                   listening_plugins=None,
                                   formatting_plugins=None)

    assert guide.is_user_ignored(error_code) is style_guide.Ignored.Explicitly


@pytest.mark.parametrize('ignore_list,error_code', [
    (['E111', 'E121'], 'E112'),
    (['E111', 'E121'], 'E122'),
    (['E11', 'E12'], 'W121'),
    (['E2', 'E12'], 'E112'),
    (['E2', 'E12'], 'E111'),
])
def test_is_user_ignored_implicitly_selects_errors(ignore_list, error_code):
    """Verify we detect users does not explicitly ignore an error."""
    guide = style_guide.StyleGuide(create_options(ignore=ignore_list),
                                   arguments=[],
                                   checker_plugins=None,
                                   listening_plugins=None,
                                   formatting_plugins=None)

    assert guide.is_user_ignored(error_code) is style_guide.Selected.Implicitly


@pytest.mark.parametrize('select_list,error_code', [
    (['E111', 'E121'], 'E111'),
    (['E111', 'E121'], 'E121'),
    (['E11', 'E12'], 'E121'),
    (['E2', 'E12'], 'E121'),
    (['E2', 'E12'], 'E211'),
])
def test_is_user_selected_selects_errors(select_list, error_code):
    """Verify we detect users explicitly selecting an error."""
    guide = style_guide.StyleGuide(create_options(select=select_list),
                                   arguments=[],
                                   checker_plugins=None,
                                   listening_plugins=None,
                                   formatting_plugins=None)

    assert (guide.is_user_selected(error_code) is
            style_guide.Selected.Explicitly)


def test_is_user_selected_implicitly_selects_errors():
    """Verify we detect users implicitly selecting an error."""
    select_list = []
    error_code = 'E121'
    guide = style_guide.StyleGuide(create_options(select=select_list),
                                   arguments=[],
                                   checker_plugins=None,
                                   listening_plugins=None,
                                   formatting_plugins=None)

    assert (guide.is_user_selected(error_code) is
            style_guide.Selected.Implicitly)


@pytest.mark.parametrize('select_list,error_code', [
    (['E111', 'E121'], 'E112'),
    (['E111', 'E121'], 'E122'),
    (['E11', 'E12'], 'E132'),
    (['E2', 'E12'], 'E321'),
    (['E2', 'E12'], 'E410'),
])
def test_is_user_selected_excludes_errors(select_list, error_code):
    """Verify we detect users implicitly excludes an error."""
    guide = style_guide.StyleGuide(create_options(select=select_list),
                                   arguments=[],
                                   checker_plugins=None,
                                   listening_plugins=None,
                                   formatting_plugins=None)

    assert guide.is_user_selected(error_code) is style_guide.Ignored.Implicitly


@pytest.mark.parametrize('select_list,ignore_list,error_code,expected', [
    (['E111', 'E121'], [], 'E111', style_guide.Decision.Selected),
    (['E111', 'E121'], [], 'E112', style_guide.Decision.Ignored),
    (['E111', 'E121'], [], 'E121', style_guide.Decision.Selected),
    (['E111', 'E121'], [], 'E122', style_guide.Decision.Ignored),
    (['E11', 'E12'], [], 'E132', style_guide.Decision.Ignored),
    (['E2', 'E12'], [], 'E321', style_guide.Decision.Ignored),
    (['E2', 'E12'], [], 'E410', style_guide.Decision.Ignored),
    (['E11', 'E121'], ['E1'], 'E112', style_guide.Decision.Selected),
    (['E111', 'E121'], ['E2'], 'E122', style_guide.Decision.Ignored),
    (['E11', 'E12'], ['E13'], 'E132', style_guide.Decision.Ignored),
    (['E1', 'E3'], ['E32'], 'E321', style_guide.Decision.Ignored),
    ([], ['E2', 'E12'], 'E410', style_guide.Decision.Selected),
    (['E4'], ['E2', 'E12', 'E41'], 'E410', style_guide.Decision.Ignored),
    (['E41'], ['E2', 'E12', 'E4'], 'E410', style_guide.Decision.Selected),
])
def test_should_report_error(select_list, ignore_list, error_code, expected):
    """Verify we decide when to report an error."""
    guide = style_guide.StyleGuide(create_options(select=select_list,
                                                  ignore=ignore_list),
                                   arguments=[],
                                   checker_plugins=None,
                                   listening_plugins=None,
                                   formatting_plugins=None)

    assert guide.should_report_error(error_code) is expected