import type { AnyCaller } from "../../util/function.js";
import type { RequestOptions } from "../../util/http.js";
import type { Endpoint } from "../endpoint/Endpoint.js";
/** Provider for API endpoints rooted at a common base URL. */
export declare abstract class APIProvider<P = unknown, R = unknown> implements AsyncDisposable {
    /** The base URL for this API. */
    abstract readonly url: URL;
    /**
     * Render the full final URL for an API request to a given endpoint with a given payload.
     * - Includes `?query` params if this is a `HEAD` or `GET` request.
     *
     * @throws {RequiredError} if this endpoint's path has `{placeholders}` but `payload` is not a data object.
     * @throws {RequiredError} if this is a `HEAD` or `GET` request but `payload` is not a data object.
     */
    abstract renderURL<PP extends P, RR extends R>(endpoint: Endpoint<PP, RR>, payload: PP, caller?: AnyCaller): URL;
    /**
     * Create a `Request` that targets this endpoint with a given base URL.
     *
     * @param payload The payload to embed into the `Request` to send to the endpoint.
     * - Path `{placeholders}` are rendered from `payload`
     * - For `GET` and `HEAD`, remaining `payload` fields are appended as `?query` params.
     * - For all other requests, `payload` is sent as the body.
     *
     * @param options The `RequestOptions` to use when creating the `Request`
     * - Merges `options` with `this.options` to make the final request options.
     *
     * @returns The created request.
     * - Merges `options` with `this.options` to make the final request options.
     * - Includes an `AbortSignal` based on `this.timeout` if it's set to a number in milliseconds.
     * - The timeout `AbortSignal` is merged with any manual signal set in `
     *
     * @throws {RequiredError} if this endpoint's path has `{placeholders}` but `payload` is not a data object.
     * @throws {RequiredError} if this is a `HEAD` or `GET` request but `payload` is not a data object.
     */
    abstract createRequest<PP extends P, RR extends R>(endpoint: Endpoint<PP, RR>, payload: PP, options?: RequestOptions, caller?: AnyCaller): Request;
    /** Fetch a `Resource` using this provider (defaults to Javascript `fetch()` API). */
    abstract fetch(request: Request): Promise<Response>;
    /**
     * Parse an HTTP `Response` for this endpoint.
     * - Non-2xx responses become `ResponseError`.
     * - Does not validate the result against the endpoint schema — use `ValidationAPIProvider` for that.
     */
    abstract parseResponse<PP extends P, RR extends R>(_endpoint: Endpoint<PP, RR>, response: Response, caller?: AnyCaller): Promise<RR>;
    /** Send a payload to an `Endpoint` and retrieve the result. */
    call<PP extends P, RR extends R>(endpoint: Endpoint<PP, RR>, payload: PP, options?: RequestOptions, caller?: AnyCaller): Promise<RR>;
    [Symbol.asyncDispose](): Promise<void>;
}