client.py

# Copyright (c) Meta Platforms, Inc. and affiliates.
# All rights reserved.
#
# This source code is licensed under the BSD-style license found in the
# LICENSE file in the root directory of this source tree.

"""Python Env Environment Client."""

from typing import Any, Dict

from openenv.core import EnvClient
from openenv.core.client_types import StepResult
from openenv.core.env_server.types import State

try:
    from .models import PythonAction, PythonObservation
except ImportError:
    from models import PythonAction, PythonObservation  # type: ignore


class PythonEnv(EnvClient[PythonAction, PythonObservation, State]):
    """Typed client for the Python code-review environment."""

    def _step_payload(self, action: PythonAction) -> Dict[str, Any]:
        """Convert a validated action model to the JSON payload expected by the server."""

        return action.model_dump(exclude_none=True)

    def _parse_result(self, payload: Dict[str, Any]) -> StepResult[PythonObservation]:
        """Parse a server response into a typed step result."""

        obs_data = dict(payload.get("observation", {}))
        obs_data.setdefault("done", payload.get("done", False))
        obs_data.setdefault("reward", payload.get("reward"))
        observation = PythonObservation.model_validate(obs_data)

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

    def _parse_state(self, payload: Dict[str, Any]) -> State:
        """Parse the server state payload into the shared state model."""

        return State.model_validate(payload)