import pytest

from base import BaseParserTest
from core.BuiltinConcepts import BuiltinConcepts
from core.error import ErrorContext
from evaluators.RecognizeDefConcept import RecognizeDefConcept
from helpers import _rv, _rvf
from parsers.ConceptDefinitionParser import ConceptDefinition
from parsers.ParserInput import ParserInput


class TestRecognizeDefConcept(BaseParserTest):
    @pytest.fixture()
    def evaluator(self, sheerka):
        return sheerka.evaluators[RecognizeDefConcept.NAME]

    def test_i_can_match(self, sheerka, context, evaluator):
        ret_val = _rv(sheerka.newn(BuiltinConcepts.PARSER_INPUT, pi=ParserInput("def concept")))
        assert evaluator.matches(context, ret_val).status is True

        ret_val = _rv(sheerka.newn(BuiltinConcepts.PARSER_INPUT, pi=ParserInput("def")))
        assert evaluator.matches(context, ret_val).status is False

        ret_val = _rv(sheerka.newn(BuiltinConcepts.PARSER_INPUT, pi=ParserInput("other text")))
        assert evaluator.matches(context, ret_val).status is False

        ret_val = _rv(sheerka.newn(BuiltinConcepts.UNKNOWN_CONCEPT))  # it responds to USER_INPUT only
        assert evaluator.matches(context, ret_val).status is False

        ret_val = _rvf(sheerka.newn(BuiltinConcepts.PARSER_INPUT, pi=ParserInput("def concept")))  # status is false
        assert evaluator.matches(context, ret_val).status is False

    def test_i_can_recognize_a_def_concept(self, context, evaluator):
        ret_val_input = self.get_parser_input(context, "def concept one as 1")
        res = evaluator.eval(context, None, ret_val_input)

        assert len(res.new) == 1
        assert res.new[0].status
        assert isinstance(res.new[0].value, ConceptDefinition)

        assert res.eaten == [ret_val_input]

    def test_i_can_manage_when_def_concept_fails(self, context, evaluator):
        ret_val_input = self.get_parser_input(context, "def concept")
        res = evaluator.eval(context, None, ret_val_input)

        assert len(res.new) == 1
        assert not res.new[0].status
        assert isinstance(res.new[0].value, ErrorContext)

        assert res.eaten == []