from evaluators.BaseEvaluator import BaseEvaluator
from parsers.DefaultParser import DefConceptNode
import logging

log = logging.getLogger(__name__)


class AddConceptEvaluator(BaseEvaluator):
    """
    Used to add a new concept
    """

    def __init__(self):
        super().__init__("Add new Concept", 50)

    def matches(self, context, items):
        return len(items) == 1 and items[0].status and isinstance(items[0].value, DefConceptNode)

    def eval(self, context, items):
        log.debug("Adding a new concept")
        node = items[0].value
        sheerka = context.sheerka
        return sheerka.add_concept(context, node)