"""Rust Coder Environment 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 models import RustCoderAction, RustCoderObservation


class RustCoderEnv(
    EnvClient[RustCoderAction, RustCoderObservation, State]
):
    """
    Client for the Rust Coder Environment.

    Maintains a persistent WebSocket connection to the environment server.

    Example:
        >>> with RustCoderEnv(base_url="http://localhost:8000") as client:
        ...     result = client.reset()
        ...     print(result.observation.problem_description)
        ...     result = client.step(RustCoderAction(code="fn main() {}"))
        ...     print(result.reward)

    Example with Docker:
        >>> client = RustCoderEnv.from_docker_image("rust_coder-env:latest")
        >>> try:
        ...     result = client.reset()
        ...     result = client.step(RustCoderAction(code="fn main() {}"))
        ... finally:
        ...     client.close()
    """

    def _step_payload(self, action: RustCoderAction) -> Dict:
        """Convert RustCoderAction to JSON payload for step message."""
        return {
            "code": action.code,
        }

    def _parse_result(self, payload: Dict) -> StepResult[RustCoderObservation]:
        """Parse server response into StepResult[RustCoderObservation]."""
        obs_data = payload.get("observation", {})
        observation = RustCoderObservation(
            problem_description=obs_data.get("problem_description", ""),
            header_section=obs_data.get("header_section", ""),
            compilation_success=obs_data.get("compilation_success", False),
            compilation_output=obs_data.get("compilation_output", ""),
            test_results=obs_data.get("test_results", []),
            reward_breakdown=obs_data.get("reward_breakdown", {}),
            done=payload.get("done", False),
            reward=payload.get("reward", 0.0),
        )

        return StepResult(
            observation=observation,
            reward=payload.get("reward", 0.0),
            done=payload.get("done", False),
        )

    def _parse_state(self, payload: Dict) -> State:
        """Parse server response into State object."""
        return State(
            episode_id=payload.get("episode_id"),
            step_count=payload.get("step_count", 0),
        )