from ast import Str

import pytest
from core.builtin_concepts import BuiltinConcepts
from core.concept import Concept, ConceptParts, DoNotResolve
from core.tokenizer import Tokenizer, TokenKind, Token
from parsers.BnfParser import BnfParser
from parsers.ConceptLexerParser import ConceptLexerParser, ConceptNode, Sequence, StrMatch, OrderedChoice, Optional, \
    ParsingExpressionVisitor, TerminalNode, NonTerminalNode, ZeroOrMore, OneOrMore, \
    UnrecognizedTokensNode, cnode, short_cnode, ConceptExpression, ConceptGroupExpression

from tests.TestUsingMemoryBasedSheerka import TestUsingMemoryBasedSheerka


class ConceptVisitor(ParsingExpressionVisitor):
    def __init__(self):
        self.concepts = set()

    def visit_ConceptExpression(self, node):
        self.concepts.add(node.concept)


def u(parsing_expression, start, end, children=None):
    """
    u stands for underlying
    :param parsing_expression:
    :param start:
    :param end:
    :param children:
    :return:
    """
    if isinstance(parsing_expression, str):
        parsing_expression = StrMatch(parsing_expression)

    if isinstance(parsing_expression, StrMatch):
        return TerminalNode(parsing_expression, start, end, parsing_expression.to_match)

    return NonTerminalNode(parsing_expression, start, end, [], children)


def evaluated(concept):
    c = Concept(name=concept.name, body=concept.name)


def t(text):
    if text.startswith("'") or text.startswith('"'):
        return Token(TokenKind.STRING, text, 0, 0, 0)

    if text.startswith(" "):
        return Token(TokenKind.WHITESPACE, text, 0, 0, 0)

    return Token(TokenKind.IDENTIFIER, text, 0, 0, 0)


def get_expected(concept, text=None):
    c = Concept(name=concept.name)
    c.compiled[ConceptParts.BODY] = DoNotResolve(text or concept.name)
    c.init_key()
    c.metadata.id = concept.id
    return c


def cbody(concept):
    """cbody stands for compiled body"""
    if not ConceptParts.BODY in concept.compiled:
        return None
    return concept.compiled[ConceptParts.BODY]


def cprop(concept, prop_name):
    """cbody stands for compiled property"""
    return concept.compiled[prop_name]


class TestConceptLexerParser(TestUsingMemoryBasedSheerka):

    def init(self, concepts, grammar):
        context = self.get_context()
        for c in concepts:
            context.sheerka.add_in_cache(c)
            context.sheerka.set_id_if_needed(c, False)

        parser = ConceptLexerParser()
        parser.initialize(context, grammar)

        return context, parser

    def execute(self, concepts, grammar, text):
        context, parser = self.init(concepts, grammar)

        res = parser.parse(context, text)
        wrapper = res.value
        return_value = res.value.value

        return context, res, wrapper, return_value

    @pytest.mark.parametrize("match, text", [
        ("foo", "foo"),
        ("'foo'", "'foo'"),
        ("1", "1"),
        ("3.14", "3.14"),
        ("+", "+"),
        (StrMatch("foo"), "foo"),
        (StrMatch("'foo'"), "'foo'"),
        (StrMatch("1"), "1"),
        (StrMatch("3.14"), "3.14"),
        (StrMatch("+"), "+"),
    ])
    def test_i_can_match_simple_tokens(self, match, text):
        foo = Concept(name="foo")
        grammar = {foo: match}

        context, res, wrapper, return_value = self.execute([foo], grammar, text)

        assert res.status
        assert context.sheerka.isinstance(wrapper, BuiltinConcepts.PARSER_RESULT)
        assert return_value == [ConceptNode(get_expected(foo, text), 0, 0, source=text, underlying=u(match, 0, 0))]

    def test_i_can_match_multiple_concepts_in_one_input(self):
        one = Concept(name="one")
        two = Concept(name="two")
        grammar = {one: "one", two: "two"}

        context, res, wrapper, return_value = self.execute([one, two], grammar, "one two one")

        assert res.status
        assert context.sheerka.isinstance(wrapper, BuiltinConcepts.PARSER_RESULT)
        assert return_value == [
            ConceptNode(get_expected(one), 0, 0, source="one", underlying=u("one", 0, 0)),
            ConceptNode(get_expected(two), 2, 2, source="two", underlying=u("two", 2, 2)),
            ConceptNode(get_expected(one), 4, 4, source="one", underlying=u("one", 4, 4)),
        ]

    def test_i_can_match_sequence(self):
        foo = Concept(name="foo")
        grammar = {foo: Sequence("one", "two", "three")}

        context, res, wrapper, return_value = self.execute([foo], grammar, "one two three")

        assert res.status
        assert context.sheerka.isinstance(wrapper, BuiltinConcepts.PARSER_RESULT)
        assert return_value == [
            ConceptNode(
                get_expected(foo, "one two three"),
                0,
                4,
                source="one two three",
                underlying=u(grammar[foo], 0, 4, [
                    u("one", 0, 0),
                    u("two", 2, 2),
                    u("three", 4, 4)]))]

    def test_i_always_choose_the_longest_match(self):
        foo = Concept(name="foo")
        bar = Concept(name="bar")
        grammar = {bar: Sequence("one", "two"), foo: Sequence("one", "two", "three")}

        context, res, wrapper, return_value = self.execute([foo, bar], grammar, "one two three")

        assert res.status
        assert context.sheerka.isinstance(wrapper, BuiltinConcepts.PARSER_RESULT)
        assert return_value == [cnode("foo", 0, 4, "one two three")]

    def test_i_can_match_several_sequences(self):
        foo = Concept(name="foo")
        bar = Concept(name="bar")
        grammar = {bar: Sequence("one", "two"), foo: Sequence("one", "two", "three")}

        context, res, wrapper, return_value = self.execute([foo, bar], grammar, "one two three one two")

        assert res.status
        assert context.sheerka.isinstance(wrapper, BuiltinConcepts.PARSER_RESULT)
        assert return_value == [
            cnode("foo", 0, 4, "one two three"),
            cnode("bar", 6, 8, "one two"),
        ]

    def test_i_can_match_ordered_choice(self):
        foo = Concept(name="foo")
        grammar = {foo: OrderedChoice("one", "two")}
        context, parser = self.init([foo], grammar)

        res1 = parser.parse(context, "one")
        assert res1.status
        assert context.sheerka.isinstance(res1.value, BuiltinConcepts.PARSER_RESULT)
        assert res1.value.body == [cnode("foo", 0, 0, "one")]
        assert res1.value.body[0].underlying == u(grammar[foo], 0, 0, [u("one", 0, 0)])

        res2 = parser.parse(context, "two")
        assert res2.status
        assert context.sheerka.isinstance(res2.value, BuiltinConcepts.PARSER_RESULT)
        assert res2.value.body == [cnode("foo", 0, 0, "two")]
        assert res2.value.body[0].underlying == u(grammar[foo], 0, 0, [u("two", 0, 0)])

        res3 = parser.parse(context, "three")
        assert not res3.status
        assert context.sheerka.isinstance(res3.value, BuiltinConcepts.PARSER_RESULT)
        assert res3.value.value == [
            UnrecognizedTokensNode(0, 0, [t("three")])
        ]

    def test_i_cannot_match_ordered_choice_with_empty_alternative(self):
        foo = Concept(name="foo")
        grammar = {foo: Sequence(OrderedChoice("one", ""), "two")}

        context, res, wrapper, return_value = self.execute([foo], grammar, "ok")

        assert not res.status
        assert context.sheerka.isinstance(wrapper, BuiltinConcepts.PARSER_RESULT)
        assert return_value == [
            UnrecognizedTokensNode(0, 0, [t("ok")])
        ]

    def test_i_can_mix_sequences_and_ordered_choices(self):
        foo = Concept(name="foo")
        grammar = {foo: Sequence(OrderedChoice("twenty", "thirty"), "one", "ok")}

        context, parser = self.init([foo], grammar)

        res1 = parser.parse(context, "twenty one ok")
        assert res1.status
        assert context.sheerka.isinstance(res1.value, BuiltinConcepts.PARSER_RESULT)
        assert res1.value.body == [ConceptNode(get_expected(foo, "twenty one ok"), 0, 4, source="twenty one ok",
                                               underlying=u(grammar[foo], 0, 4, [
                                                   u(OrderedChoice("twenty", "thirty"), 0, 0, [u("twenty", 0, 0)]),
                                                   u("one", 2, 2),
                                                   u("ok", 4, 4)]))]

        res2 = parser.parse(context, "thirty one ok")
        assert res2.status
        assert context.sheerka.isinstance(res2.value, BuiltinConcepts.PARSER_RESULT)
        assert res2.value.body == [ConceptNode(get_expected(foo, "thirty one ok"), 0, 4, source="thirty one ok",
                                               underlying=u(grammar[foo], 0, 4, [
                                                   u(OrderedChoice("twenty", "thirty"), 0, 0, [u("thirty", 0, 0)]),
                                                   u("one", 2, 2),
                                                   u("ok", 4, 4)]))]

        res3 = parser.parse(context, "twenty one")
        assert not res3.status
        assert context.sheerka.isinstance(res2.value, BuiltinConcepts.PARSER_RESULT)
        assert res3.value.value == [
            UnrecognizedTokensNode(0, 2, [t("twenty"), t(" "), t("one")])
        ]

    def test_i_can_mix_ordered_choices_and_sequences(self):
        foo = Concept(name="foo")
        grammar = {foo: OrderedChoice(Sequence("twenty", "thirty"), "one")}

        context, parser = self.init([foo], grammar)

        res = parser.parse(context, "twenty thirty")
        assert res.status
        assert res.value.value == [cnode("foo", 0, 2, "twenty thirty")]

        res = parser.parse(context, "one")
        assert res.status
        assert res.value.value == [cnode("foo", 0, 0, "one")]

    def test_i_cannot_parse_empty_optional(self):
        foo = Concept(name="foo")
        grammar = {foo: Optional("one")}
        context, parser = self.init([foo], grammar)

        res = parser.parse(context, "")
        return_value = res.value

        assert not res.status
        assert context.sheerka.isinstance(return_value, BuiltinConcepts.IS_EMPTY)

    def test_i_can_parse_optional(self):
        foo = Concept(name="foo")
        grammar = {foo: Optional("one")}

        context, res, wrapper, return_value = self.execute([foo], grammar, "one")

        assert res.status
        assert return_value == [ConceptNode(get_expected(foo, "one"), 0, 0, source="one",
                                            underlying=u(grammar[foo], 0, 0, [u("one", 0, 0)]))]

    def test_i_can_parse_sequence_starting_with_optional(self):
        foo = Concept(name="foo")
        grammar = {foo: Sequence(Optional("twenty"), "one")}
        context, parser = self.init([foo], grammar)

        res = parser.parse(context, "twenty one")
        assert res.status
        assert res.value.body == [ConceptNode(
            get_expected(foo, "twenty one"), 0, 2,
            source="twenty one",
            underlying=u(grammar[foo], 0, 2,
                         [
                             u(Optional("twenty"), 0, 0, [u("twenty", 0, 0)]),
                             u("one", 2, 2)]
                         ))]

        res = parser.parse(context, "one")
        assert res.status
        assert res.value.body == [ConceptNode(get_expected(foo, "one"), 0, 0, source="one",
                                              underlying=u(grammar[foo], 0, 0, [u("one", 0, 0)]))]

    def test_i_can_parse_sequence_ending_with_optional(self):
        foo = Concept(name="foo")
        grammar = {foo: Sequence("one", "two", Optional("three"))}

        context, parser = self.init([foo], grammar)

        res = parser.parse(context, "one two three")
        assert res.status
        assert res.value.body == [cnode("foo", 0, 4, "one two three")]

        res = parser.parse(context, "one two")
        assert res.status
        assert res.value.body == [cnode("foo", 0, 2, "one two")]

    def test_i_can_parse_sequence_with_optional_in_between(self):
        foo = Concept(name="foo")

        grammar = {foo: Sequence("one", Optional("two"), "three")}

        context, parser = self.init([foo], grammar)

        res = parser.parse(context, "one two three")
        assert res.status
        assert res.value.body == [cnode("foo", 0, 4, "one two three")]

        res = parser.parse(context, "one three")
        assert res.status
        assert res.value.body == [cnode("foo", 0, 2, "one three")]

    def test_i_cannot_parse_wrong_input_with_optional(self):
        foo = Concept(name="foo")
        grammar = {foo: Optional("one")}

        context, res, wrapper, return_value = self.execute([foo], grammar, "two")

        assert not res.status
        assert context.sheerka.isinstance(wrapper, BuiltinConcepts.PARSER_RESULT)
        assert return_value == [
            UnrecognizedTokensNode(0, 0, [t("two")])
        ]

    def test_i_can_use_reference(self):
        # when there are multiple matches for the same input
        # Do I need to create a choice concept ?
        # No, create a return value for every possible graph

        foo = Concept(name="foo")
        bar = Concept(name="bar")
        grammar = {foo: Sequence("one", "two"), bar: foo}
        context, parser = self.init([foo, bar], grammar)
        res = parser.parse(context, "one two")

        assert len(res) == 2

        assert res[0].status
        assert context.sheerka.isinstance(res[0].value, BuiltinConcepts.PARSER_RESULT)
        assert res[0].value.body == [cnode("foo", 0, 2, "one two")]
        concept_found_1 = res[0].value.body[0].concept
        assert cbody(concept_found_1) == DoNotResolve("one two")

        assert res[1].status
        assert context.sheerka.isinstance(res[1].value, BuiltinConcepts.PARSER_RESULT)
        assert res[1].value.body == [cnode("bar", 0, 2, "one two")]
        concept_found_2 = res[1].value.body[0].concept
        # the body and the prop['foo'] are the same concept 'foo'
        assert cbody(concept_found_2) == get_expected(foo, "one two")
        assert id(cprop(concept_found_2, "foo")) == id(cbody(concept_found_2))

    def test_i_can_use_a_reference_with_a_body(self):
        """
        Same test than before (test_i_can_use_reference())
        but this time, the concept 'foo' already has a body.
        :return:
        """

        foo = Concept(name="foo", body="'foo'")
        bar = Concept(name="bar")
        grammar = {foo: Sequence("one", "two"), bar: foo}
        context, parser = self.init([foo, bar], grammar)
        res = parser.parse(context, "one two")

        assert len(res) == 2

        assert res[0].status
        assert context.sheerka.isinstance(res[0].value, BuiltinConcepts.PARSER_RESULT)
        assert res[0].value.body == [cnode("foo", 0, 2, "one two")]
        concept_found_1 = res[0].value.body[0].concept
        assert concept_found_1.metadata.body == "'foo'"
        assert cbody(concept_found_1) is None

        assert res[1].status
        assert context.sheerka.isinstance(res[1].value, BuiltinConcepts.PARSER_RESULT)
        assert res[1].value.body == [cnode("bar", 0, 2, "one two")]
        concept_found_2 = res[1].value.body[0].concept
        assert cbody(concept_found_2) == foo
        # the body and the prop['foo'] are the same concept 'foo'
        assert id(cprop(concept_found_2, "foo")) == id(cbody(concept_found_2))

    def test_i_can_use_context_reference_with_multiple_levels(self):
        """
        Same than previous one, but with reference of reference
        :return:
        """

        foo = Concept(name="foo")
        bar = Concept(name="bar")
        baz = Concept(name="baz")
        grammar = {foo: Sequence("one", "two"), bar: foo, baz: bar}
        context, parser = self.init([foo, bar, baz], grammar)

        res = parser.parse(context, "one two")
        assert len(res) == 3

        assert res[0].status
        assert context.sheerka.isinstance(res[0].value, BuiltinConcepts.PARSER_RESULT)
        assert res[0].value.body == [cnode("foo", 0, 2, "one two")]
        concept_found_1 = res[0].value.body[0].concept
        assert cbody(concept_found_1) == DoNotResolve("one two")

        assert res[1].status
        assert context.sheerka.isinstance(res[1].value, BuiltinConcepts.PARSER_RESULT)
        assert res[1].value.body == [cnode("bar", 0, 2, "one two")]
        concept_found_2 = res[1].value.body[0].concept
        assert cbody(concept_found_2) == get_expected(foo, "one two")
        assert id(cprop(concept_found_2, "foo")) == id(cbody(concept_found_2))

        assert res[2].status
        assert context.sheerka.isinstance(res[2].value, BuiltinConcepts.PARSER_RESULT)
        assert res[2].value.body == [cnode("baz", 0, 2, "one two")]
        concept_found_3 = res[2].value.body[0].concept
        expected_foo = get_expected(foo, "one two")
        assert cbody(concept_found_3) == get_expected(bar, expected_foo)
        assert cprop(concept_found_3, "foo") == expected_foo
        assert id(cprop(concept_found_3, "bar")) == id(cbody(concept_found_3))

    def test_order_is_not_important_when_using_references(self):
        """
        Same test than test_i_can_use_reference(),
        but this time, 'bar' is declared before 'foo'
        So the order of the result is different
        :return:
        """
        foo = Concept(name="foo")
        bar = Concept(name="bar")
        grammar = {bar: foo, foo: Sequence("one", "two")}
        context, parser = self.init([foo, bar], grammar)

        res = parser.parse(context, "one two")
        assert len(res) == 2
        assert res[0].value.body == [cnode("bar", 0, 2, "one two")]
        assert res[1].value.body == [cnode("foo", 0, 2, "one two")]

    def test_i_can_parse_when_reference(self):
        foo = Concept(name="foo")
        bar = Concept(name="bar")
        grammar = {bar: Sequence(foo, OrderedChoice("one", "two")), foo: OrderedChoice("twenty", "thirty")}
        context, parser = self.init([foo, bar], grammar)

        res = parser.parse(context, "twenty two")
        assert res.status
        assert res.value.body == [cnode("bar", 0, 2, "twenty two")]
        concept_found = res.value.body[0].concept
        assert cbody(concept_found) == DoNotResolve("twenty two")
        assert cprop(concept_found, "foo") == get_expected(foo, "twenty")

        res = parser.parse(context, "thirty one")
        assert res.status
        assert res.value.body == [cnode("bar", 0, 2, "thirty one")]
        concept_found = res.value.body[0].concept
        assert cbody(concept_found) == DoNotResolve("thirty one")
        assert cprop(concept_found, "foo") == get_expected(foo, "thirty")

        res = parser.parse(context, "twenty")
        assert res.status
        assert res.value.body == [cnode("foo", 0, 0, "twenty")]
        concept_found = res.value.body[0].concept
        assert cbody(concept_found) == DoNotResolve("twenty")

    def test_i_can_parse_when_reference_has_a_body(self):
        foo = Concept(name="foo", body="'one'")
        bar = Concept(name="bar")
        grammar = {bar: Sequence(foo, OrderedChoice("one", "two")), foo: OrderedChoice("twenty", "thirty")}
        context, parser = self.init([foo, bar], grammar)

        res = parser.parse(context, "twenty two")
        assert res.status
        assert res.value.body == [cnode("bar", 0, 2, "twenty two")]
        concept_found = res.value.body[0].concept
        assert cbody(concept_found) == DoNotResolve("twenty two")
        assert cprop(concept_found, "foo") == foo

        res = parser.parse(context, "twenty")
        assert res.status
        assert res.value.body == [cnode("foo", 0, 0, "twenty")]
        concept_found = res.value.body[0].concept
        assert concept_found.metadata.body == "'one'"

    def test_i_can_parse_multiple_results(self):
        foo = Concept(name="foo")
        bar = Concept(name="bar")
        grammar = {
            bar: Sequence("one", "two"),
            foo: Sequence("one", OrderedChoice("two", "three"))
        }
        context, parser = self.init([foo, bar], grammar)

        res = parser.parse(context, "one two")
        assert len(res) == 2
        assert res[0].status
        assert context.sheerka.isinstance(res[0].value, BuiltinConcepts.PARSER_RESULT)
        assert res[0].value.body == [cnode("bar", 0, 2, "one two")]
        concept_found_0 = res[0].value.body[0].concept
        assert cbody(concept_found_0) == DoNotResolve("one two")
        assert len(concept_found_0.props) == 0

        assert res[1].status
        assert context.sheerka.isinstance(res[1].value, BuiltinConcepts.PARSER_RESULT)
        assert res[1].value.body == [cnode("foo", 0, 2, "one two")]
        concept_found_1 = res[1].value.body[0].concept
        assert cbody(concept_found_1) == DoNotResolve("one two")
        assert len(concept_found_1.props) == 0

    def test_i_can_parse_multiple_results_times_two(self):
        foo = Concept(name="foo")
        bar = Concept(name="bar")
        grammar = {
            bar: Sequence("one", "two"),
            foo: Sequence("one", OrderedChoice("two", "three"))
        }
        context, parser = self.init([foo, bar], grammar)

        res = parser.parse(context, "one two one two")
        assert len(res) == 4
        assert res[0].status
        assert context.sheerka.isinstance(res[0].value, BuiltinConcepts.PARSER_RESULT)
        assert res[0].value.body == [short_cnode("bar", "one two"), short_cnode("bar", "one two")]

        assert res[1].status
        assert context.sheerka.isinstance(res[1].value, BuiltinConcepts.PARSER_RESULT)
        assert res[1].value.body == [short_cnode("foo", "one two"), short_cnode("bar", "one two")]

        assert res[2].status
        assert context.sheerka.isinstance(res[2].value, BuiltinConcepts.PARSER_RESULT)
        assert res[2].value.body == [short_cnode("bar", "one two"), short_cnode("foo", "one two")]

        assert res[3].status
        assert context.sheerka.isinstance(res[3].value, BuiltinConcepts.PARSER_RESULT)
        assert res[3].value.body == [short_cnode("foo", "one two"), short_cnode("foo", "one two")]

    def test_i_can_parse_multiple_results_when_reference(self):
        """
        TODO : There should no be two answer, has the one with bar is totally useless
            Note that bar = Sequence(foo, OrderedChoice("one", "two")) does not match

        :return:
        """
        foo = Concept(name="foo")
        bar = Concept(name="bar")
        grammar = {
            bar: Sequence(foo, Optional(OrderedChoice("one", "two"))),
            foo: OrderedChoice("twenty", "thirty")
        }
        context, parser = self.init([foo, bar], grammar)

        res = parser.parse(context, "twenty")
        assert len(res) == 2
        assert res[0].status
        assert context.sheerka.isinstance(res[0].value, BuiltinConcepts.PARSER_RESULT)
        assert res[0].value.body == [cnode("bar", 0, 0, "twenty")]

        assert res[1].status
        assert context.sheerka.isinstance(res[1].value, BuiltinConcepts.PARSER_RESULT)
        assert res[1].value.body == [cnode("foo", 0, 0, "twenty")]

    def test_i_can_parse_concept_reference_that_is_not_in_grammar(self):
        one = Concept(name="one")
        two = Concept(name="two")
        foo = Concept(name="foo")
        grammar = {foo: Sequence("twenty", OrderedChoice(one, two))}
        context, parser = self.init([one, two, foo], grammar)

        res = parser.parse(context, "twenty two")
        assert res.status
        assert res.value.body == [cnode("foo", 0, 2, "twenty two")]
        concept_found = res.value.body[0].concept
        assert cbody(concept_found) == DoNotResolve("twenty two")
        assert cprop(concept_found, "two") == get_expected(two, "two")

        res = parser.parse(context, "twenty one")
        assert res.status
        assert res.value.body == [cnode("foo", 0, 2, "twenty one")]

    def test_i_can_initialize_when_cyclic_reference(self):
        foo = Concept(name="foo")
        grammar = {foo: Optional("one", ConceptExpression("foo"))}
        context, parser = self.init([foo], grammar)

        assert parser.concepts_grammars[foo] == Optional("one", ConceptExpression(foo, rule_name="foo"))

    def test_i_cannot_initialize_when_cyclic_reference_when_concept_is_under_construction_and_not_known(self):
        foo = Concept(name="foo").init_key()
        grammar = {foo: Optional("one", ConceptExpression("foo"))}

        context = self.get_context()
        parser = ConceptLexerParser()
        parser.initialize(context, grammar)
        assert parser.concepts_grammars[foo] == Optional("one", ConceptExpression("foo", rule_name="foo"))

    def test_i_can_initialize_when_cyclic_reference_when_concept_is_under_construction_and_known(self):
        foo = Concept(name="foo").init_key()
        grammar = {foo: Optional("one", ConceptExpression("foo"))}

        context = self.get_context()
        context.concepts["foo"] = foo
        parser = ConceptLexerParser()
        parser.initialize(context, grammar)
        assert parser.concepts_grammars[foo] == Optional("one", ConceptExpression(foo, rule_name="foo"))

    def test_i_can_parse_concept_reference_that_is_group(self):
        """
        if one is  number, then number is a 'group'
        a group can be found under the sdp entry 'all_<group_name>'
        """

        context = self.get_context()
        one = Concept(name="one")
        two = Concept(name="two")
        number = Concept(name="number")
        foo = Concept(name="foo")
        for c in [one, two, number, foo]:
            context.sheerka.set_id_if_needed(c, False)
            context.sheerka.add_in_cache(c)

        context.sheerka.add_concept_to_set(context, one, number)
        context.sheerka.add_concept_to_set(context, two, number)

        grammar = {foo: Sequence("twenty", number)}

        parser = ConceptLexerParser()
        parser.initialize(context, grammar)

        res = parser.parse(context, "twenty two")
        assert res.status
        assert res.value.body == [cnode("foo", 0, 2, "twenty two")]
        concept_found = res.value.body[0].concept
        assert cbody(concept_found) == DoNotResolve("twenty two")
        assert cprop(concept_found, "two") == get_expected(two, "two")
        assert cprop(concept_found, "number") == get_expected(number, get_expected(two, "two"))

        res = parser.parse(context, "twenty one")
        assert res.status
        assert res.value.body == [cnode("foo", 0, 2, "twenty one")]
        concept_found = res.value.body[0].concept
        assert cbody(concept_found) == DoNotResolve("twenty one")
        assert cprop(concept_found, "one") == get_expected(one, "one")
        assert cprop(concept_found, "number") == get_expected(number, get_expected(one, "one"))

    def test_i_can_parse_zero_or_more(self):
        foo = Concept(name="foo")
        grammar = {foo: ZeroOrMore("one")}

        context, res, wrapper, return_value = self.execute([foo], grammar, "one one")

        assert res.status
        assert return_value == [cnode("foo", 0, 2, "one one")]
        assert return_value[0].underlying == u(grammar[foo], 0, 2, [u("one", 0, 0), u("one", 2, 2)])

        concept_found = return_value[0].concept
        assert cbody(concept_found) == DoNotResolve("one one")

    def test_i_can_parse_sequence_and_zero_or_more(self):
        foo = Concept(name="foo")
        grammar = {foo: Sequence(ZeroOrMore("one"), "two")}
        context, parser = self.init([foo], grammar)

        res = parser.parse(context, "one one two")
        assert res.status
        assert res.value.value == [cnode("foo", 0, 4, "one one two")]

        res = parser.parse(context, "two")
        assert res.status
        assert res.value.value == [cnode("foo", 0, 0, "two")]

    def test_i_cannot_parse_zero_and_more_when_wrong_entry(self):
        foo = Concept(name="foo")
        grammar = {foo: ZeroOrMore("one")}
        context, parser = self.init([foo], grammar)

        parser = ConceptLexerParser()
        parser.initialize(context, grammar)

        res = parser.parse(context, "one two")
        assert not res.status
        assert res.value.value == [
            cnode("foo", 0, 0, "one"),
            UnrecognizedTokensNode(1, 2, [t(" "), t("two")])
        ]

        res = parser.parse(context, "two")
        assert not res.status
        assert res.value.value == [
            UnrecognizedTokensNode(0, 0, [t("two")])
        ]

    def test_i_can_parse_zero_and_more_with_separator(self):
        foo = Concept(name="foo")
        grammar = {foo: ZeroOrMore("one", sep=",")}

        context, res, wrapper, return_value = self.execute([foo], grammar, "one, one , one")

        assert res.status
        assert return_value == [cnode("foo", 0, 7, "one, one , one")]

    def test_that_zero_and_more_is_greedy(self):
        foo = Concept(name="foo")
        bar = Concept(name="bar")
        grammar = {foo: ZeroOrMore("one"), bar: "one"}

        context, res, wrapper, return_value = self.execute([foo], grammar, "one one one")

        assert res.status
        assert return_value == [cnode("foo", 0, 4, "one one one")]

    def test_i_can_parse_one_and_more(self):
        foo = Concept(name="foo")
        grammar = {foo: OneOrMore("one")}

        context, res, wrapper, return_value = self.execute([foo], grammar, "one one")

        assert res.status
        assert return_value == [cnode("foo", 0, 2, "one one")]
        assert return_value[0].underlying == u(grammar[foo], 0, 2, [
            u("one", 0, 0),
            u("one", 2, 2)])

    def test_i_can_parse_sequence_and_one_or_more(self):
        foo = Concept(name="foo")
        grammar = {foo: Sequence(OneOrMore("one"), "two")}
        context, parser = self.init([foo], grammar)

        res = parser.parse(context, "one one two")
        assert res.status
        assert res.value.value == [cnode("foo", 0, 4, "one one two")]

        res = parser.parse(context, "two")
        assert not res.status
        assert res.value.value == [
            UnrecognizedTokensNode(0, 0, [t("two")])
        ]

    def test_i_can_parse_one_and_more_with_separator(self):
        foo = Concept(name="foo")
        grammar = {foo: OneOrMore("one", sep=",")}

        context, res, wrapper, return_value = self.execute([foo], grammar, "one, one , one")

        assert res.status
        assert return_value == [cnode("foo", 0, 7, "one, one , one")]
        assert return_value[0].underlying == u(grammar[foo], 0, 7, [
            u("one", 0, 0),
            u("one", 3, 3),
            u("one", 7, 7)])

    def test_that_one_and_more_is_greedy(self):
        foo = Concept(name="foo")
        bar = Concept(name="bar")
        grammar = {foo: OneOrMore("one"), bar: "one"}

        context, res, wrapper, return_value = self.execute([foo], grammar, "one one one")

        assert res.status
        assert return_value == [cnode("foo", 0, 4, "one one one")]

    def test_i_can_detect_infinite_recursion(self):
        foo = Concept(name="foo")
        bar = Concept(name="bar")

        grammar = {
            bar: foo,
            foo: bar
        }
        parser = ConceptLexerParser()
        parser.initialize(self.get_context(), grammar)

        assert bar not in parser.concepts_grammars
        assert foo not in parser.concepts_grammars

    def test_i_can_detect_indirect_infinite_recursion_with_ordered_choice(self):
        foo = Concept(name="foo")
        bar = Concept(name="bar")
        grammar = {
            bar: foo,
            foo: OrderedChoice(bar, "foo")
        }

        parser = ConceptLexerParser()
        parser.initialize(self.get_context(), grammar)

        assert foo not in parser.concepts_grammars  # removed because of the infinite recursion
        assert bar not in parser.concepts_grammars  # removed because of the infinite recursion

        # the other way around is possible
        grammar = {
            bar: foo,
            foo: OrderedChoice("foo", bar)
        }
        context, parser = self.init([foo, bar], grammar)

        assert foo in parser.concepts_grammars
        assert bar in parser.concepts_grammars

        res = parser.parse(context, "foo")
        assert len(res) == 2
        assert res[0].status
        assert res[0].value.body == [cnode("bar", 0, 0, "foo")]
        assert res[1].status
        assert res[1].value.body == [cnode("foo", 0, 0, "foo")]

    def test_i_can_detect_indirect_infinite_recursion_with_sequence(self):
        foo = Concept(name="foo")
        bar = Concept(name="bar")

        grammar = {
            bar: foo,
            foo: Sequence("one", bar, "two")
        }
        parser = ConceptLexerParser()
        parser.initialize(self.get_context(), grammar)

        assert foo not in parser.concepts_grammars  # removed because of the infinite recursion
        assert bar not in parser.concepts_grammars  # removed because of the infinite recursion

    def test_i_can_detect_indirect_infinite_recursion_with_sequence_or_ordered_choice(self):
        foo = Concept(name="foo")
        bar = Concept(name="bar")

        grammar = {
            bar: foo,
            foo: Sequence("one", OrderedChoice(bar, "other"), "two")
        }
        parser = ConceptLexerParser()
        parser.initialize(self.get_context(), grammar)

        assert foo not in parser.concepts_grammars  # removed because of the infinite recursion
        assert bar not in parser.concepts_grammars  # removed because of the infinite recursion

    def test_infinite_recursion_does_not_fail_if_a_concept_is_missing(self):
        foo = Concept(name="foo")
        bar = Concept(name="bar")

        grammar = {
            foo: bar
        }
        parser = ConceptLexerParser()
        parser.initialize(self.get_context(), grammar)

        assert foo in parser.concepts_grammars

    def test_i_can_detect_indirect_infinite_recursion_with_optional(self):
        # TODO infinite recursion with optional
        pass

    def test_i_can_detect_indirect_infinite_recursion_with_zero_and_more(self):
        # TODO infinite recursion with optional
        pass

    def test_i_can_detect_indirect_infinite_recursion_with_one_and_more(self):
        # TODO infinite recursion with optional
        pass

    def test_i_can_visit_parsing_expression(self):
        mult = Concept(name="mult")
        add = Concept(name="add")

        visitor = ConceptVisitor()
        visitor.visit(Sequence(mult, Optional(Sequence("+", add))))

        assert sorted(list(visitor.concepts)) == ["add", "mult"]

    def test_i_can_initialize_rule_names(self):
        context = self.get_context()
        foo = Concept(name="foo")
        bar = Concept(name="bar")

        grammar = {foo: Sequence("one", "two"), bar: foo}
        parser = ConceptLexerParser()
        ret = parser.initialize(context, grammar)
        return_value = ret.body

        assert return_value[foo].rule_name == ""
        assert return_value[bar].rule_name == "foo"

    @pytest.mark.parametrize("text,  end_position", [
        ("foo", 0),
        ("foo bar", 2),
        ("foo bar ", 3),
        (" foo bar ", 4)
    ])
    def test_cannot_parser_unknown_concepts(self, text, end_position):
        context, res, wrapper, return_value = self.execute([], {}, text)
        tokens = list(Tokenizer(text))[:-1]

        assert not res.status
        assert context.sheerka.isinstance(wrapper, BuiltinConcepts.PARSER_RESULT)
        assert return_value == [UnrecognizedTokensNode(0, end_position, tokens)]

    def test_i_cannot_parse_when_part_of_the_input_is_unrecognized(self):
        one = Concept(name="one")
        two = Concept(name="two")
        grammar = {one: "one", two: "two"}

        context, res, wrapper, return_value = self.execute([one, two], grammar, "one two three")

        assert not res.status
        assert context.sheerka.isinstance(wrapper, BuiltinConcepts.PARSER_RESULT)
        assert return_value == [
            ConceptNode(get_expected(one, "one"), 0, 0, source="one", underlying=u("one", 0, 0)),
            ConceptNode(get_expected(two, "two"), 2, 2, source="two", underlying=u("two", 2, 2)),
            UnrecognizedTokensNode(3, 4, [t(" "), t("three")])
        ]

    def test_i_cannot_parse_when_wrong_sequence(self):
        foo = Concept(name="foo")
        grammar = {foo: Sequence("one", "two", "three")}

        context, res, wrapper, return_value = self.execute([foo], grammar, "one two three one")

        assert not res.status
        assert context.sheerka.isinstance(wrapper, BuiltinConcepts.PARSER_RESULT)
        assert return_value == [
            short_cnode("foo", "one two three"),
            UnrecognizedTokensNode(5, 6, [t(" "), t("one")])
        ]

    def test_i_cannot_parse_when_sequence_cannot_match_because_of_end_of_file(self):
        foo = Concept(name="foo")
        grammar = {foo: Sequence("one", "two", "three")}

        context, res, wrapper, return_value = self.execute([foo], grammar, "one two")

        assert not res.status
        assert context.sheerka.isinstance(wrapper, BuiltinConcepts.PARSER_RESULT)
        assert return_value == [
            UnrecognizedTokensNode(0, 2, [t("one"), t(" "), t("two")])
        ]

    def test_i_cannot_parse_multiple_results_when_unknown_tokens_at_the_end(self):
        foo = Concept(name="foo")
        bar = Concept(name="bar")
        grammar = {
            bar: Sequence("one", "two"),
            foo: Sequence("one", OrderedChoice("two", "three"))
        }
        context, parser = self.init([foo, bar], grammar)

        res = parser.parse(context, "one two four five")

        assert len(res) == 2
        assert not res[0].status
        assert context.sheerka.isinstance(res[0].value, BuiltinConcepts.PARSER_RESULT)
        assert res[0].value.body == [
            cnode("bar", 0, 2, "one two"),
            UnrecognizedTokensNode(3, 6, [t(" "), t("four"), t(" "), t("five")])
        ]

        assert not res[1].status
        assert context.sheerka.isinstance(res[1].value, BuiltinConcepts.PARSER_RESULT)
        assert res[1].value.body == [
            cnode("foo", 0, 2, "one two"),
            UnrecognizedTokensNode(3, 6, [t(" "), t("four"), t(" "), t("five")])
        ]

    def test_i_cannot_parse_multiple_results_when_beginning_by_unknown_tokens(self):
        foo = Concept(name="foo")
        bar = Concept(name="bar")
        grammar = {
            bar: Sequence("one", "two"),
            foo: Sequence("one", OrderedChoice("two", "three"))
        }
        context, parser = self.init([foo, bar], grammar)

        res = parser.parse(context, "four five one two")

        assert len(res) == 2
        assert not res[0].status
        assert context.sheerka.isinstance(res[0].value, BuiltinConcepts.PARSER_RESULT)
        assert res[0].value.body == [
            UnrecognizedTokensNode(0, 3, [t("four"), t(" "), t("five"), t(" ")]),
            cnode("bar", 4, 6, "one two"),
        ]

        assert not res[1].status
        assert context.sheerka.isinstance(res[1].value, BuiltinConcepts.PARSER_RESULT)
        assert res[1].value.body == [
            UnrecognizedTokensNode(0, 3, [t("four"), t(" "), t("five"), t(" ")]),
            cnode("foo", 4, 6, "one two"),
        ]

    def test_i_cannot_parse_multiple_results_when_surrounded_by_unknown_tokens(self):
        foo = Concept(name="foo")
        bar = Concept(name="bar")
        grammar = {
            bar: Sequence("one", "two"),
            foo: Sequence("one", OrderedChoice("two", "three"))
        }
        context, parser = self.init([foo, bar], grammar)

        res = parser.parse(context, "four five one two six seven")
        assert len(res) == 2
        assert not res[0].status
        assert context.sheerka.isinstance(res[0].value, BuiltinConcepts.PARSER_RESULT)
        assert res[0].value.body == [
            UnrecognizedTokensNode(0, 3, [t("four"), t(" "), t("five"), t(" ")]),
            cnode("bar", 4, 6, "one two"),
            UnrecognizedTokensNode(7, 10, [t(" "), t("six"), t(" "), t("seven")]),
        ]

        assert not res[1].status
        assert context.sheerka.isinstance(res[1].value, BuiltinConcepts.PARSER_RESULT)
        assert res[1].value.body == [
            UnrecognizedTokensNode(0, 3, [t("four"), t(" "), t("five"), t(" ")]),
            cnode("foo", 4, 6, "one two"),
            UnrecognizedTokensNode(7, 10, [t(" "), t("six"), t(" "), t("seven")]),
        ]

    def test_i_cannot_parse_multiple_results_when_unknown_tokens_in_the_middle(self):
        context = self.get_context()
        foo = Concept(name="foo")
        bar = Concept(name="bar")
        baz = Concept(name="baz")
        grammar = {
            bar: Sequence("one", "two"),
            foo: Sequence("one", OrderedChoice("two", "three")),
            baz: StrMatch("six"),
        }
        context, parser = self.init([foo, bar, baz], grammar)

        res = parser.parse(context, "one two four five six")
        assert len(res) == 2
        assert not res[0].status
        assert context.sheerka.isinstance(res[0].value, BuiltinConcepts.PARSER_RESULT)
        assert res[0].value.body == [
            cnode("bar", 0, 2, "one two"),
            UnrecognizedTokensNode(3, 7, [t(" "), t("four"), t(" "), t("five"), t(" ")]),
            cnode("baz", 8, 8, "six"),
        ]

        assert not res[1].status
        assert context.sheerka.isinstance(res[1].value, BuiltinConcepts.PARSER_RESULT)
        assert res[1].value.body == [
            cnode("foo", 0, 2, "one two"),
            UnrecognizedTokensNode(3, 7, [t(" "), t("four"), t(" "), t("five"), t(" ")]),
            cnode("baz", 8, 8, "six"),
        ]

    def test_i_can_get_the_inner_concept_when_possible(self):
        foo = Concept(name="foo")
        one = Concept(name="one")
        grammar = {foo: Sequence(Optional(ZeroOrMore(one)), ZeroOrMore("one"))}

        context, res, wrapper, return_value = self.execute([foo, one], grammar, "one")

        assert res.status
        assert context.sheerka.isinstance(wrapper, BuiltinConcepts.PARSER_RESULT)
        assert return_value == [cnode("foo", 0, 0, "one")]
        concept_found = return_value[0].concept
        assert cbody(concept_found) == get_expected(one, "one")
        assert id(cprop(concept_found, "one")) == id(cbody(concept_found))

    def test_i_can_get_the_inner_concept_when_possible_with_rule_name(self):
        foo = Concept(name="foo")
        one = Concept(name="one")
        grammar = {foo: Sequence(
            Optional(ZeroOrMore(one, rule_name="zero"), rule_name="opt"),
            ZeroOrMore("one"), rule_name="seq")}

        context, res, wrapper, return_value = self.execute([foo, one], grammar, "one")

        assert res.status
        assert context.sheerka.isinstance(wrapper, BuiltinConcepts.PARSER_RESULT)
        assert return_value == [cnode("foo", 0, 0, "one")]
        concept_found = return_value[0].concept
        assert cbody(concept_found) == get_expected(one, "one")
        assert id(cprop(concept_found, "one")) == id(cbody(concept_found))
        assert id(cprop(concept_found, "zero")) == id(cbody(concept_found))
        assert id(cprop(concept_found, "opt")) == id(cbody(concept_found))
        assert id(cprop(concept_found, "seq")) == id(cbody(concept_found))

    def test_i_get_multiple_props_when_zero_or_more(self):
        foo = Concept(name="foo")
        one = Concept(name="one")
        grammar = {foo: ZeroOrMore(one)}

        context, res, wrapper, return_value = self.execute([foo, one], grammar, "one one one")
        assert res.status
        assert context.sheerka.isinstance(wrapper, BuiltinConcepts.PARSER_RESULT)
        assert return_value == [cnode("foo", 0, 4, "one one one")]
        concept_found = return_value[0].concept
        assert cbody(concept_found) == DoNotResolve("one one one")
        assert len(concept_found.compiled["one"]) == 3
        assert cprop(concept_found, "one")[0] == get_expected(one)
        assert cprop(concept_found, "one")[1] == get_expected(one)
        assert cprop(concept_found, "one")[2] == get_expected(one)
        assert id(cprop(concept_found, "one")[0]) != id(cprop(concept_found, "one")[1])
        assert id(cprop(concept_found, "one")[1]) != id(cprop(concept_found, "one")[2])
        assert id(cprop(concept_found, "one")[2]) != id(cprop(concept_found, "one")[0])

    def test_i_get_multiple_props_when_zero_or_more_and_different_values(self):
        foo = Concept(name="foo")
        one = Concept(name="one")
        grammar = {foo: ZeroOrMore(Sequence(one, "ok", rule_name="seq")), one: OrderedChoice("one", "un", "uno")}

        context, res, wrapper, return_value = self.execute([foo, one], grammar, "one ok un ok uno ok")
        assert res.status
        assert context.sheerka.isinstance(wrapper, BuiltinConcepts.PARSER_RESULT)
        assert return_value == [short_cnode("foo", "one ok un ok uno ok")]
        concept_found = return_value[0].concept
        assert cprop(concept_found, "one")[0] == get_expected(one, "one")
        assert cprop(concept_found, "one")[1] == get_expected(one, "un")
        assert cprop(concept_found, "one")[2] == get_expected(one, "uno")
        assert cprop(concept_found, "seq")[0] == DoNotResolve("one ok")
        assert cprop(concept_found, "seq")[1] == DoNotResolve("un ok")
        assert cprop(concept_found, "seq")[2] == DoNotResolve("uno ok")

    @pytest.mark.parametrize("rule, expected", [
        (StrMatch("string"), "'string'"),
        (StrMatch("string", rule_name="rule_name"), "'string'=rule_name"),
        (Sequence(StrMatch("foo"), StrMatch("bar")), "('foo' 'bar')"),
        (Sequence(StrMatch("foo"), StrMatch("bar"), rule_name="rule_name"), "('foo' 'bar')=rule_name"),
        (OrderedChoice(StrMatch("foo"), StrMatch("bar")), "('foo'|'bar')"),
        (OrderedChoice(StrMatch("foo"), StrMatch("bar"), rule_name="rule_name"), "('foo'|'bar')=rule_name"),
        (Optional(StrMatch("foo")), "'foo'?"),
        (Optional(StrMatch("foo"), rule_name="rule_name"), "'foo'?=rule_name"),
        (ZeroOrMore(StrMatch("foo")), "'foo'*"),
        (ZeroOrMore(StrMatch("foo"), rule_name="rule_name"), "'foo'*=rule_name"),
        (OneOrMore(StrMatch("foo")), "'foo'+"),
        (OneOrMore(StrMatch("foo"), rule_name="rule_name"), "'foo'+=rule_name"),
        (Sequence(
            Optional(StrMatch("foo"), rule_name="a"),
            ZeroOrMore(StrMatch("bar"), rule_name="b"),
            OneOrMore(StrMatch("baz"), rule_name="c"),
            rule_name="d"), "('foo'?=a 'bar'*=b 'baz'+=c)=d"),
        (OrderedChoice(
            Optional(StrMatch("foo"), rule_name="a"),
            ZeroOrMore(StrMatch("bar"), rule_name="b"),
            OneOrMore(StrMatch("baz"), rule_name="c"),
            rule_name="d"), "('foo'?=a|'bar'*=b|'baz'+=c)=d"),
        (Sequence(
            OrderedChoice(StrMatch("foo"), StrMatch("bar"), rule_name="a"),
            OrderedChoice(StrMatch("x"), StrMatch("y"), rule_name="b"),
            rule_name="c"), "(('foo'|'bar')=a ('x'|'y')=b)=c")
    ])
    def test_i_can_encode_grammar(self, rule, expected):
        foo = Concept(name="foo")
        grammar = {foo: rule}
        context, parser = self.init([foo], grammar)

        encoded = parser.encode_grammar(parser.concepts_grammars)
        assert encoded["c:foo|1001:"] == expected

        bnf_parser = BnfParser()
        parse_res = bnf_parser.parse(context, encoded["c:foo|1001:"])
        assert parse_res.status
        assert parse_res.value.value == rule

    def test_i_can_encode_grammar_when_concept_simple(self):
        foo = Concept(name="foo")
        bar = Concept(name="bar")
        grammar = {foo: ConceptExpression(bar)}
        context, parser = self.init([foo, bar], grammar)

        encoded = parser.encode_grammar(parser.concepts_grammars)
        assert encoded["c:foo|1001:"] == "c:bar|1002:=bar"

        bnf_parser = BnfParser()
        parse_res = bnf_parser.parse(context, encoded["c:foo|1001:"])
        assert parse_res.status
        assert parse_res.value.value == grammar[foo]

    def test_i_can_encode_grammar_when_concepts(self):
        foo = Concept(name="foo")
        bar = Concept(name="bar")
        baz = Concept(name="baz")
        grammar = {foo: Sequence(
            StrMatch("a"),
            OrderedChoice(ConceptExpression(bar),
                          OneOrMore(ConceptExpression(baz)), rule_name="oc"), rule_name="s")}
        context, parser = self.init([foo, bar, baz], grammar)

        encoded = parser.encode_grammar(parser.concepts_grammars)
        assert encoded["c:foo|1001:"] == "('a' (c:bar|1002:=bar|c:baz|1003:=baz+)=oc)=s"

        bnf_parser = BnfParser()
        parse_res = bnf_parser.parse(context, encoded["c:foo|1001:"])
        assert parse_res.status
        assert parse_res.value.value == grammar[foo]

    def test_i_can_encode_grammar_when_set_concepts(self):
        foo = Concept(name="foo")
        bar = Concept(name="bar")
        baz = Concept(name="baz")
        grammar = {foo: Sequence(
            StrMatch("a"),
            OrderedChoice(bar,
                          OneOrMore(ConceptExpression(baz)), rule_name="oc"), rule_name="s")}
        context = self.get_context()
        for c in [foo, bar, baz]:
            context.sheerka.add_in_cache(c)
            context.sheerka.set_id_if_needed(c, False)
        context.sheerka.add_concept_to_set(context, baz, bar)

        parser = ConceptLexerParser()
        parser.initialize(context, grammar)

        encoded = parser.encode_grammar(parser.concepts_grammars)
        assert encoded["c:foo|1001:"] == "('a' (c:bar|1002:=bar|c:baz|1003:=baz+)=oc)=s"

        bnf_parser = BnfParser()
        parse_res = bnf_parser.parse(context, encoded["c:foo|1001:"])
        assert parse_res.status

        expected = Sequence(
            StrMatch("a"),
            OrderedChoice(ConceptGroupExpression(bar, rule_name="bar"),
                          OneOrMore(ConceptExpression(baz, rule_name="baz")), rule_name="oc"), rule_name="s")
        assert parse_res.value.value == expected

    #
    # def test_i_can_parse_basic_arithmetic_operations_and_resolve_properties(self):
    #     context = self.get_context()
    #     add = Concept(name="add")
    #     mult = Concept(name="mult")
    #     atom = Concept(name="atom")
    #
    #     grammar = {
    #         add: Sequence(mult, Optional(Sequence(OrderedChoice('+', '-', rule_name="sign"), add))),
    #         mult: Sequence(atom, Optional(Sequence(OrderedChoice('*', '/'), mult))),
    #         atom: OrderedChoice(OrderedChoice('1', '2', '3'), Sequence('(', add, ')')),
    #     }
    #
    #     parser = ConceptLexerParser()
    #     parser.register(grammar)
    #
    #     # res = parser.parse(context, "1")
    #     # assert len(res) == 3  # add, mult, atom
    #     #
    #     # res = parser.parse(context, "1 * 2")
    #     # assert len(res) == 2  # add and mult
    #     #
    #     # res = parser.parse(context, "1 + 2")
    #     # assert res.status
    #     # assert return_value == [ConceptNode(add, 0, 4, source="1 + 2")]
    #
    #     res = parser.parse(context, "1 * 2 + 3")
    #     assert res.status
    #     assert return_value == [ConceptNode(add, 0, 4, source="1 + 2 + 3")]

    def test_i_can_register_concepts_with_the_same_name(self):
        # TODO : concepts are registered by name,
        #  what when two concepts have the same name ?
        pass

    def test_i_can_parse_very_very_long_input(self):
        # TODO: In the current implementation, all the tokens are loaded in memory
        # It's clearly not the good approach
        pass