from typing import Optional

from ecologits.impacts import Impacts

from constants import MODEL_MAP


class EcoStore:
    _instance: Optional["EcoStore"] = None
    # model_type -> [Impacts]
    models_eco_impact_map = dict()

    def __new__(cls):
        if cls._instance is None:
            cls._instance = super(EcoStore, cls).__new__(cls)

            for model_type in MODEL_MAP:
                cls._instance.models_eco_impact_map[model_type] = []

        return cls._instance

    def add_impacts(self, impact: Impacts, model_type: str):
        self.models_eco_impact_map[model_type].append(impact)

    def get_eco(self):
        return self.models_eco_impact_map