import type { BaseContext, RequestId } from "@modelcontextprotocol/client";
import type { ZodLiteral, ZodObject, ZodType } from "zod/v4";
/**
 * A whole-message Zod schema (`method` literal plus `params`), as accepted by
 * the 1.x `setRequestHandler(Schema, handler)` forms.
 */
export type LegacyMethodSchema = ZodObject<{
    method: ZodLiteral<string>;
    params: ZodType;
}>;
/**
 * The `extra` argument 1.x request handlers received.
 *
 * @deprecated Use the 2.x `BaseContext` (`extra.mcpReq.signal`, `extra.mcpReq.id`).
 */
export type LegacyRequestHandlerExtra = {
    signal: AbortSignal;
    requestId: RequestId;
    sessionId?: string;
    _meta?: BaseContext["mcpReq"]["_meta"];
    sendRequest: BaseContext["mcpReq"]["send"];
    sendNotification: BaseContext["mcpReq"]["notify"];
    authInfo?: NonNullable<BaseContext["http"]>["authInfo"];
};
/** @deprecated Use `setRequestHandler("method", { params, result }, (params, ctx) => …)`. */
export type LegacyRequestHandler<S extends LegacyMethodSchema> = (request: S["_output"], extra: LegacyRequestHandlerExtra) => unknown;
/** @deprecated Use `setNotificationHandler("method", { params }, (params) => …)`. */
export type LegacyNotificationHandler<S extends LegacyMethodSchema> = (notification: S["_output"]) => void | Promise<void>;
/**
 * `setRequestHandler` with the 1.x `(Schema, handler)` form kept as a
 * deprecated overload next to the 2.x forms in `Modern`.
 */
export type LegacyRequestHandlerSetter<Modern> = Modern & {
    /**
     * @deprecated 1.x form. Pass the method name and `{ params }` instead;
     * removed in 3.0.
     */
    <S extends LegacyMethodSchema>(schema: S, handler: LegacyRequestHandler<S>): void;
};
/** `setNotificationHandler` counterpart of {@link LegacyRequestHandlerSetter}. */
export type LegacyNotificationHandlerSetter<Modern> = Modern & {
    /**
     * @deprecated 1.x form. Pass the method name and `{ params }` instead;
     * removed in 3.0.
     */
    <S extends LegacyMethodSchema>(schema: S, handler: LegacyNotificationHandler<S>): void;
};
/**
 * Arguments for the 2.x three-argument `setRequestHandler` /
 * `setNotificationHandler` form.
 */
type ModernArgs = [
    method: string,
    schemas: {
        params: ZodType;
    },
    handler: (params: unknown, ctx: BaseContext) => unknown
];
/**
 * Translate a 1.x `(Schema, handler)` registration into the 2.x
 * `(method, { params }, handler)` form, or return `undefined` when the call
 * is already in the 2.x form. The 1.x handler receives the reassembled
 * `{ method, params }` message and, for requests, a 1.x-shaped `extra`.
 */
export declare function toModernArgs(kind: "request" | "notification", args: unknown[]): ModernArgs | undefined;
export {};