import { NestInterceptor, ExecutionContext, CallHandler } from '@nestjs/common';
import { Observable } from 'rxjs';
import { XapiRoot } from '@xapi-js/core';

/**
 * Interceptor that parses incoming XML request bodies into XapiRoot objects.
 * This interceptor should be applied to routes that expect an `application/xml` content type
 * and whose body contains X-API XML data.
 */
declare class XapiRequestInterceptor implements NestInterceptor {
    private readonly logger;
    /**
     * Intercepts the incoming request to parse XML body.
     * If the content type is `application/xml` and a body exists, it attempts to parse the body
     * into an `XapiRoot` object and replaces the original request body with it.
     * @param context - The execution context of the request.
     * @param next - A `CallHandler` to invoke the next interceptor or the route handler.
     * @returns An `Observable` that will eventually contain the response.
     */
    intercept(context: ExecutionContext, next: CallHandler): Promise<Observable<any>>;
}

/**
 * Interceptor that serializes XapiRoot objects returned by NestJS route handlers into XML strings.
 * This interceptor should be applied to routes that return an `XapiRoot` instance
 * and whose response should be `application/xml`.
 */
declare class XapiResponseInterceptor implements NestInterceptor<XapiRoot, Promise<string>> {
    private readonly logger;
    /**
     * Intercepts the outgoing response to serialize XapiRoot to XML string.
     * If the handler returns an `XapiRoot` instance, it attempts to serialize it
     * into an XML string.
     * @param context - The execution context of the request.
     * @param next - A `CallHandler` to invoke the next interceptor or the route handler.
     * @returns An `Observable` that will eventually contain the XML string response.
     * @throws {Error} if the handler does not return an `XapiRoot` instance or serialization fails.
     */
    intercept(context: ExecutionContext, next: CallHandler): Observable<Promise<string>>;
}

export { XapiRequestInterceptor, XapiResponseInterceptor };