"""HTTP adapter for the NetKingdom identity provisioning service."""

from __future__ import annotations

import json
import time
from typing import Any
from urllib.error import HTTPError, URLError
from urllib.request import Request, urlopen

from user_engine.ports import IdentityDriftResult, ProvisioningRequest, ProvisioningResult


class HTTPIdentityProvisioningAdapter:
    def __init__(
        self,
        *,
        base_url: str,
        bearer_token: str,
        timeout: float = 10,
        retry_delay: float = 0.1,
    ) -> None:
        self.base_url = base_url.rstrip("/")
        self.bearer_token = bearer_token.strip()
        if not self.bearer_token:
            raise ValueError("bearer token must not be empty")
        self.timeout = timeout
        self.retry_delay = retry_delay

    def provision(self, request: ProvisioningRequest) -> ProvisioningResult:
        return self._post("/v1/identities/provision", {
            "user_id": request.user_id,
            "tenant": request.tenant,
            "primary_email": request.primary_email,
            "display_name": request.display_name,
            "idempotency_key": request.idempotency_key,
            "correlation_id": request.correlation_id,
            "roles": request.roles,
        })

    def suspend(self, *, external_subject: str, idempotency_key: str, correlation_id: str) -> ProvisioningResult:
        return self._lifecycle("suspend", external_subject, idempotency_key, correlation_id)

    def reactivate(self, *, external_subject: str, idempotency_key: str, correlation_id: str) -> ProvisioningResult:
        return self._lifecycle("reactivate", external_subject, idempotency_key, correlation_id)

    def deprovision(self, *, external_subject: str, idempotency_key: str, correlation_id: str) -> ProvisioningResult:
        return self._lifecycle("deprovision", external_subject, idempotency_key, correlation_id)

    def drift(
        self,
        request: ProvisioningRequest,
        *,
        external_subject: str,
        desired_status: str = "active",
    ) -> IdentityDriftResult:
        return self._desired("drift", request, external_subject, desired_status)

    def reconcile(
        self,
        request: ProvisioningRequest,
        *,
        external_subject: str,
        desired_status: str = "active",
    ) -> IdentityDriftResult:
        return self._desired("reconcile", request, external_subject, desired_status)

    def _lifecycle(self, action: str, subject: str, key: str, correlation_id: str) -> ProvisioningResult:
        return self._post(f"/v1/identities/{action}", {
            "external_subject": subject,
            "idempotency_key": key,
            "correlation_id": correlation_id,
        })

    def _desired(
        self,
        action: str,
        request: ProvisioningRequest,
        external_subject: str,
        desired_status: str,
    ) -> IdentityDriftResult:
        result = self._request(f"/v1/identities/{action}", {
            "external_subject": external_subject,
            "user_id": request.user_id,
            "tenant": request.tenant,
            "primary_email": request.primary_email,
            "display_name": request.display_name,
            "idempotency_key": request.idempotency_key,
            "correlation_id": request.correlation_id,
            "roles": request.roles,
            "desired_status": desired_status,
        })
        return IdentityDriftResult(
            provider=str(result["provider"]),
            external_subject=str(result["external_subject"]),
            status=str(result["status"]),
            drift=tuple(str(item) for item in result.get("drift", ())),
            changed=tuple(str(item) for item in result.get("changed", ())),
        )

    def _post(self, path: str, payload: dict[str, Any]) -> ProvisioningResult:
        result = self._request(path, payload)
        return ProvisioningResult(
            provider=str(result["provider"]),
            external_subject=str(result["external_subject"]),
            status=str(result["status"]),
            resumed=bool(result.get("resumed", False)),
            password_setup_url=(
                str(result["password_setup_url"])
                if result.get("password_setup_url")
                else None
            ),
        )

    def _request(self, path: str, payload: dict[str, Any]) -> dict[str, Any]:
        request = Request(
            self.base_url + path,
            data=json.dumps(payload).encode(),
            headers={
                "Authorization": f"Bearer {self.bearer_token}",
                "Content-Type": "application/json",
            },
            method="POST",
        )
        for attempt in range(2):
            try:
                with urlopen(request, timeout=self.timeout) as response:
                    result = json.loads(response.read())
                break
            except HTTPError as exc:
                if exc.code not in {502, 503, 504} or attempt:
                    message = exc.read(4096).decode("utf-8", "replace")
                    raise RuntimeError(
                        f"identity provisioning failed ({exc.code}): {message}"
                    ) from exc
            except URLError as exc:
                if attempt:
                    raise RuntimeError("identity provisioning dependency unavailable") from exc
            time.sleep(self.retry_delay)
        return dict(result)