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.

"""WorkflowArena client."""

from typing import Dict

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

from workflow_arena.models import WorkflowArenaAction, WorkflowArenaObservation


class WorkflowArenaEnv(
    EnvClient[WorkflowArenaAction, WorkflowArenaObservation, State]
):
    """Typed client for the WorkflowArena server."""

    def _step_payload(self, action: WorkflowArenaAction) -> Dict:
        """Convert a typed action into the JSON payload expected by the server."""

        return action.model_dump(mode="json")

    def _parse_result(self, payload: Dict) -> StepResult[WorkflowArenaObservation]:
        """Parse a server response into a typed observation wrapper."""

        obs_data = payload.get("observation", {})
        observation = WorkflowArenaObservation.model_validate(
            {
                **obs_data,
                "done": payload.get("done", False),
                "reward": payload.get("reward"),
            }
        )

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

    def _parse_state(self, payload: Dict) -> State:
        """Parse server state response into the generic OpenEnv state type."""

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