from __future__ import annotations

from dataclasses import dataclass
from typing import Protocol

from world_simulator.domain import WorldState


@dataclass(frozen=True, slots=True)
class AgentAction:
    actor_id: str
    kind: str
    payload: dict[str, object]


class AgentPlanner(Protocol):
    def plan(self, world: WorldState, actor_id: str) -> AgentAction:
        """Return the next action an agent wants to take."""