import { useEffect, useMemo } from 'react';
import { getOrCreateSharedImpl } from './get-shared';
import { init, type RumService, type ServiceConfig } from './init';

/**
 * Registers a service on mount and disposes it on unmount. On unmount the
 * service's `beforeSend`, `allowedTracingUrls`, and any context previously set
 * via `setServiceContext` are removed atomically. The config is captured on
 * first render — changing it across renders does not re-register.
 *
 * Returns a `RumService` — `{ setServiceContext }`, bound to this service.
 * The handle is identity-stable across renders.
 */
export function useRumService(config: ServiceConfig): RumService {
    useEffect(() => {
        return init({ service: config }).cleanup;
        // eslint-disable-next-line react-hooks/exhaustive-deps
    }, []);

    return useMemo(
        () => ({
            setServiceContext: context =>
                getOrCreateSharedImpl().setServiceContext(config.name, context),
        }),
        // eslint-disable-next-line react-hooks/exhaustive-deps
        []
    );
}