from __future__ import annotations
from typing import Any, Optional
import httpx


class CrudApiClient:
    """Thin async client around the ABT CRUD APIs.

    Keep business/transformation logic out of this class. The client only knows how
    to call the source endpoints and unwrap the collection names from the CRUD
    contracts.
    """

    def __init__(
        self,
        notifications_base_url: str,
        customers_base_url: str,
        timeout_seconds: float = 10.0,
    ):
        self.notifications_base_url = notifications_base_url.rstrip("/")
        self.customers_base_url = customers_base_url.rstrip("/")
        self.timeout_seconds = timeout_seconds

    async def _get(
        self,
        base_url: str,
        path: str,
        params: Optional[dict[str, Any]] = None,
    ) -> dict[str, Any]:
        async with httpx.AsyncClient(base_url=base_url, timeout=self.timeout_seconds) as client:
            response = await client.get(path, params=params)
            response.raise_for_status()
            return response.json()

    # notifications-crud.yaml
    async def get_notification_subscriptions(self, customer_profile_id: int) -> list[dict[str, Any]]:
        payload = await self._get(
            self.notifications_base_url,
            "/notificationsubscriptions",
            params={"customerProfileId": customer_profile_id, "expand": "eventTypeChannel"},
        )
        return payload.get("notificationSubscriptions", [])

    async def get_notification_category_defaults(self, notification_category_id: int) -> Optional[dict[str, Any]]:
        payload = await self._get(
            self.notifications_base_url,
            "/notificationcategories",
            params={"notificationCategoryId": notification_category_id, "expand": "eventTypeChannel"},
        )
        categories = payload.get("notificationCategories", [])
        return categories[0] if categories else None

    # customers-crud-v2.yaml
    async def get_ovpay_token(self, ovpay_token_id: Optional[int]) -> Optional[dict[str, Any]]:
        if ovpay_token_id is None:
            return None
        payload = await self._get(
            self.customers_base_url,
            "/ovpaytokens",
            params={"ovPayTokenId": ovpay_token_id},
        )
        tokens = payload.get("ovPayTokens", [])
        return tokens[0] if tokens else None

    async def get_devices(self, customer_profile_id: int) -> list[dict[str, Any]]:
        payload = await self._get(
            self.customers_base_url,
            "/devices",
            params={"customerProfileId": customer_profile_id},
        )
        return payload.get("devices", [])

    async def get_persons(self, customer_profile_id: int) -> list[dict[str, Any]]:
        """Return customer/person resources used for email-like channels.

        customers-crud-v2.yaml exposes person details through GET /customers,
        filtered by customerProfileId. For the transformation service we normalize
        the matching customer profile into one resource with the customer's email.
        """
        payload = await self._get(
            self.customers_base_url,
            "/customers",
            params={"customerProfileId": customer_profile_id},
        )
        return payload.get("customers", [])


# Backwards-compatible alias used by the service type hints.
NotificationsCrudClient = CrudApiClient