"""Client for the Store OpenEnv simulation."""

from __future__ import annotations

from typing import Any

try:
    from ._compat import EnvClient, State, StepResult
    from .models import StoreAction, StoreObservation, dump_model
except ImportError:  # pragma: no cover - supports direct module imports
    from _compat import EnvClient, State, StepResult
    from models import StoreAction, StoreObservation, dump_model


class StoreEnv(
    EnvClient[StoreAction, StoreObservation, State]
):
    """Client wrapper for the store environment."""

    def _step_payload(self, action: StoreAction) -> dict[str, Any]:
        """Convert a store action into a JSON payload."""

        return dump_model(action, exclude_none=True, exclude_defaults=True)

    def _parse_result(self, payload: dict[str, Any]) -> StepResult[StoreObservation]:
        """Parse a server response into a typed observation."""

        obs_data = payload.get("observation", {})
        clean_obs_data = {
            key: value
            for key, value in obs_data.items()
            if key not in {"done", "reward", "metadata"}
        }
        observation = StoreObservation(
            **clean_obs_data,
            done=payload.get("done", obs_data.get("done", False)),
            reward=payload.get("reward", obs_data.get("reward")),
            metadata=obs_data.get("metadata", payload.get("metadata", {})),
        )

        return StepResult(
            observation=observation,
            reward=payload.get("reward"),
            done=payload.get("done", False),
        )

    def _parse_state(self, payload: dict[str, Any]) -> State:
        """Parse the OpenEnv transport state payload."""

        return State(
            episode_id=payload.get("episode_id"),
            step_count=payload.get("step_count", 0),
        )