import sys
import os
sys.path.insert(0, os.path.join(os.path.dirname(__file__), '../..'))

from abc import ABC, abstractmethod
from models import CityState


class BaseTask(ABC):

    name:           str
    num_districts:  int
    max_steps:      int
    resource_pool:  int
    data_lag_days:  int

    @abstractmethod
    def build_initial_state(self) -> CityState:
        """Return a fresh CityState for a new episode. Called by environment.reset()."""
        ...

    def __repr__(self) -> str:
        return f"Task(name={self.name}, districts={self.num_districts}, steps={self.max_steps})"