"""Thin Python SDK client for the ``/v1`` REST API.

Capability: ``platform-sdk``.

Uses ``httpx`` directly so the client can talk to any deployed cloud-runtime
process over HTTP, or to a FastAPI ``TestClient`` instance in tests.
"""

from __future__ import annotations

from typing import Any

import httpx


class CloudAPIError(httpx.HTTPStatusError):
    def __init__(self, response: httpx.Response, detail: str) -> None:
        super().__init__(
            f"cloud API request failed with status {response.status_code}: {detail}",
            request=response.request,
            response=response,
        )
        self.status_code = response.status_code
        self.detail = detail


class CloudAuthorizationError(CloudAPIError):
    pass


class CloudClient:
    """A minimal Python wrapper for the platform SDK's ``/v1`` routes."""

    def __init__(
        self,
        base_url: str,
        *,
        http_client: httpx.Client | Any = None,
        api_prefix: str = "/v1",
        token: str | None = None,
        auth: httpx.Auth | None = None,
    ) -> None:
        if token is not None and auth is not None:
            raise ValueError("token and auth are mutually exclusive")
        self._base_url = base_url.rstrip("/")
        self._api_prefix = api_prefix.rstrip("/")
        self._headers = {"Authorization": f"Bearer {token}"} if token else None
        self._auth = auth
        if http_client is None:
            self._http = httpx.Client(base_url=self._base_url)
            self._owns_client = True
        else:
            self._http = http_client
            self._owns_client = False

    def close(self) -> None:
        if self._owns_client:
            self._http.close()

    def __enter__(self) -> "CloudClient":
        return self

    def __exit__(self, *exc: object) -> None:
        self.close()

    # ------------------------------------------------------------------- tasks

    def submit_task(
        self,
        *,
        goal: str | None = None,
        workflow_definition_id: str | None = None,
        driver_type: str | None = None,
        capability_tags: list[str] | None = None,
    ) -> dict[str, Any]:
        payload: dict[str, Any] = {
            "goal": goal,
            "workflow_definition_id": workflow_definition_id,
        }
        if driver_type is not None or capability_tags is not None:
            payload["constraints"] = {
                "driver_type": driver_type,
                "capability_tags": list(capability_tags or []),
            }
        resp = self._request("POST", "/tasks", json=payload)
        return resp.json()

    def get_task_status(self, task_id: str) -> dict[str, Any]:
        resp = self._request("GET", f"/tasks/{task_id}")
        return resp.json()

    # ----------------------------------------------------------------- devices

    def list_devices(self) -> list[dict[str, Any]]:
        resp = self._request("GET", "/devices")
        return resp.json()

    def list_hosts(self) -> list[dict[str, Any]]:
        resp = self._request("GET", "/hosts")
        return resp.json()

    # ----------------------------------------------------------------- plugins

    def list_plugins(self) -> list[dict[str, Any]]:
        resp = self._request("GET", "/plugins")
        return resp.json()

    def register_plugin(
        self,
        *,
        name: str,
        version: str,
        entry_point_kind: str,
        target: str,
    ) -> dict[str, Any]:
        payload = {
            "name": name,
            "version": version,
            "entry_point_kind": entry_point_kind,
            "target": target,
        }
        resp = self._request("POST", "/plugins", json=payload)
        return resp.json()

    # ------------------------------------------------------------------ helpers

    def _url(self, path: str) -> str:
        return f"{self._base_url}{self._api_prefix}{path}"

    def _request(
        self,
        method: str,
        path: str,
        *,
        json: dict[str, Any] | None = None,
    ) -> httpx.Response:
        response = self._http.request(
            method,
            self._url(path),
            json=json,
            headers=self._headers,
            auth=self._auth,
        )
        if response.is_success:
            return response
        try:
            payload = response.json()
        except ValueError:
            payload = {}
        detail = payload.get("detail") or "request rejected"
        error_type = (
            CloudAuthorizationError
            if response.status_code in {401, 403}
            else CloudAPIError
        )
        raise error_type(response, str(detail))