# 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.

"""My Env Environment Client."""

import os
import sys

# Ensure the 'my_env' directory is in sys.path
_current_dir = os.path.dirname(os.path.abspath(__file__))
if _current_dir not in sys.path:
    sys.path.insert(0, _current_dir)

from typing import Dict

from openenv.core import EnvClient
from openenv.core.client_types import StepResult


from models import MyAction, MyObservation, MyState


class MyEnv(
    EnvClient[MyAction, MyObservation, MyState]
):

    def _step_payload(self, action: MyAction) -> Dict:
        """
        Convert MyAction to JSON payload for step message.

        Args:
            action: MyAction instance

        Returns:
            Dictionary representation suitable for JSON encoding
        """
        return {
           'action_type':action.action_type,
           'path':action.path,
           'content':action.content
        }

    def _parse_result(self, payload: Dict) -> StepResult[MyObservation]:
        """
        Parse server response into StepResult[MyObservation].

        Args:
            payload: JSON response data from server

        Returns:
            StepResult with MyObservation
        """
        obs_data = payload.get("observation", {})
        observation = MyObservation(
            task_type=obs_data.get("task_type", None),
            task_description=obs_data.get("task_description", None),
            cwd=obs_data.get("cwd", None),
            cwd_contents=obs_data.get("cwd_contents", []),
            file_contents=obs_data.get("file_contents", None),
            message=obs_data.get("message", None),
            remaining_steps=obs_data.get("remaining_steps", None),
            available_actions=obs_data.get("available_actions", []),
            done=payload.get("done", False),
            reward=payload.get("reward", 0.0),
        )

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

    def _parse_state(self, payload: Dict) -> MyState:
        """
        Parse server response into State object.

        Args:
            payload: JSON response from state request

        Returns:
            State object with episode_id and step_count
        """
        return MyState(
            episode_id=payload.get("episode_id"),
            step_count=payload.get("step_count", 0),
            cwd=payload.get("cwd", None),
            max_steps=payload.get("max_steps", 0),
            task_type=payload.get("task_type", None),
            all_task_details=payload.get("all_task_details", {}),
            dir_structure=payload.get("dir_structure", None),
            cwd_contents=payload.get("cwd_contents", []),
            file_contents=payload.get("file_contents", None),
        )

    def grade(self, episode_id: str) -> float:
        """
        Fetch the normalized grade (0.0 – 1.0) for a given episode.

        Calls GET /grade?episode_id=<episode_id> on the server.
        Can be called at any point after reset() — reflects live task
        completion + efficiency snapshot.

        Args:
            episode_id: The episode_id passed to reset().

        Returns:
            float in [0.0, 1.0]

        Raises:
            RuntimeError: If the server returns a non-200 status.
        """
        import httpx

        # EnvClient stores _ws_url ("ws://host:port/ws"); convert to HTTP base
        http_base = (
            self._ws_url
            .replace("wss://", "https://")
            .replace("ws://", "http://")
        )
        if http_base.endswith("/ws"):
            http_base = http_base[:-3]

        url = f"{http_base}/grade"
        response = httpx.get(url, params={"episode_id": episode_id}, timeout=10.0)
        if response.status_code == 404:
            raise RuntimeError(
                f"No episode found for episode_id '{episode_id}'. "
                "Did you call reset() first?"
            )
        if response.status_code != 200:
            raise RuntimeError(
                f"Grade request failed (HTTP {response.status_code}): {response.text}"
            )
        return float(response.json()["grade"])