from core.sheerka import ReturnValue
from core.sheerka import Sheerka
from evaluators.BaseEvaluator import BaseEvaluator
import logging

log = logging.getLogger(__name__)


class DefaultEvaluator(BaseEvaluator):
    """
    Used to filter the responses of the parsers
    """

    def __init__(self):
        super().__init__("Default Evaluator", 90)

    def matches(self, context, items):
        return True

    def eval(self, context, items):
        successful_results = [item for item in items if item.status]
        number_of_successful = len(successful_results)
        total_items = len(items)

        # remove errors when a winner is found
        if number_of_successful == 1:
            log.debug(f"1 / {total_items} good item found.")
            return successful_results

        # too many winners, which one to choose ?
        if number_of_successful > 1:
            log.debug(f"{number_of_successful} / {total_items} good items. Too many success")
            return ReturnValue(self.name,
                               False,
                               context.sheerka.new(Sheerka.TOO_MANY_SUCCESS_CONCEPT_NAME, body=items))

        # only errors, i cannot help you
        log.debug(f"{total_items} items. Only errors")
        return items