import core.utils
import pytest


@pytest.mark.parametrize("lst, as_string", [
    (None, "",),
    ([], ""),
    (["hello", "world"], "hello world"),
    # (["hello world", "my friend"], '"hello world" "my friend"')
])
def test_i_can_create_string_from_a_list(lst, as_string):
    assert core.utils.sysarg_to_string(lst) == as_string


def test_i_can_get_classes():
    classes = list(core.utils.get_classes("core.builtin_concepts"))
    error_concept = core.utils.get_class("core.builtin_concepts.ErrorConcept")
    return_value_concept = core.utils.get_class("core.builtin_concepts.ReturnValueConcept")

    assert len(classes) > 2
    assert error_concept in classes
    assert return_value_concept in classes


def test_i_can_get_base_classes():
    classes = list(core.utils.get_classes_from_package("parsers"))

    # example of classes that should be in the result
    base_parser = core.utils.get_class("parsers.BaseParser.BaseParser")
    default_parser = core.utils.get_class("parsers.DefaultParser.DefaultParser")
    exact_concept_parser = core.utils.get_class("parsers.ExactConceptParser.ExactConceptParser")
    python_parser = core.utils.get_class("parsers.PythonParser.PythonParser")
    node = core.utils.get_class("parsers.BaseParser.Node")
    def_concept_node = core.utils.get_class("parsers.DefaultParser.DefConceptNode")
    python_node = core.utils.get_class("parsers.PythonParser.PythonNode")

    assert base_parser in classes
    assert default_parser in classes
    assert exact_concept_parser in classes
    assert python_parser in classes
    assert node in classes
    assert def_concept_node in classes
    assert python_node in classes


def test_i_can_get_sub_classes():
    sub_classes = core.utils.get_sub_classes("parsers", "parsers.BaseParser.BaseParser")

    # example of classes that should be (or not) in the result
    base_parser = core.utils.get_class("parsers.BaseParser.BaseParser")
    default_parser = core.utils.get_class("parsers.DefaultParser.DefaultParser")
    exact_concept_parser = core.utils.get_class("parsers.ExactConceptParser.ExactConceptParser")
    python_parser = core.utils.get_class("parsers.PythonParser.PythonParser")
    concept_lexer_parser = core.utils.get_class("parsers.ConceptLexerParser.ConceptLexerParser")

    assert base_parser not in sub_classes
    assert default_parser in sub_classes
    assert exact_concept_parser in sub_classes
    assert python_parser in sub_classes
    assert concept_lexer_parser in sub_classes


@pytest.mark.parametrize("a,b, expected", [
    ([], [], []),
    ([], ['a'], ['a']),
    ([[]], ['a'], [['a']]),
    (['a'], [], ['a']),
    ([['a']], [], [['a']]),

    ([['a']], ['b'], [['a', 'b']]),
    ([['a'], ['b']], ['c'], [['a', 'c'], ['b', 'c']]),
    ([['a1', 'a2'], ['b1', 'b2', 'b3']], ['c'], [['a1', 'a2', 'c'], ['b1', 'b2', 'b3', 'c']]),
    ([[]], ['a', 'b'], [['a'], ['b']]),
    ([['a'], ['b']], ['c', 'd', 'e'], [['a', 'c'], ['b', 'c'], ['a', 'd'], ['b', 'd'], ['a', 'e'], ['b', 'e']]),
])
def test_i_can_product(a, b, expected):
    res = core.utils.product(a, b)
    assert res == expected