from core.builtin_concepts import BuiltinConcepts
from core.concept import Concept
from evaluators.BaseEvaluator import AllReturnValuesEvaluator


class EvalEvaluator(AllReturnValuesEvaluator):
    """
    Returns the body of all successful concepts
    """

    NAME = "Eval"

    def __init__(self):
        super().__init__(self.NAME, [BuiltinConcepts.AFTER_EVALUATION], 80)
        self.successful_return_value = None
        self.to_eval = []
        self.eval_requested = None

    def matches(self, context, return_values):
        sheerka = context.sheerka
        for ret in return_values:
            if ret.status and sheerka.isinstance(ret.body, BuiltinConcepts.CONCEPT_EVAL_REQUESTED):
                self.eval_requested = ret
            elif ret.status and isinstance(ret.body, Concept) and ret.body.body:
                self.to_eval.append(ret)

        return self.eval_requested is not None and len(self.to_eval) > 0

    def eval(self, context, return_value):
        sheerka = context.sheerka
        result = []
        context.log(self.verbose_log, f"{len(self.to_eval)} return value(s) to eval", who=self)

        for ret_val in self.to_eval:
            context.log(self.verbose_log, f"{ret_val}", who=self)
            result.append(sheerka.ret(self.name, True, ret_val.body.body, parents=[ret_val, self.eval_requested]))

        return result