import type { ISmartServeOptions, ISmartServeInstance, IConnectionInfo, IServerStats, TRuntime, THttpMethod } from '../core/smartserve.interfaces.js';
interface IResolvedWebSocketHeartbeatOptions {
    intervalMs: number;
    timeoutMs: number;
    payload?: Uint8Array;
}
/**
 * Adapter characteristics - what each runtime supports
 */
export interface IAdapterCharacteristics {
    /** Zero-copy streaming support */
    zeroCopyStreaming: boolean;
    /** HTTP/2 support */
    http2Support: boolean;
    /** Maximum concurrent connections */
    maxConnections: number | 'unlimited';
    /** Native WebSocket upgrade support */
    nativeWebSocket: boolean;
}
/**
 * Handler function that receives web standard Request and returns Response
 */
export type TRequestHandler = (request: Request, info: IConnectionInfo) => Response | Promise<Response>;
/**
 * Abstract base adapter for all runtime implementations
 */
export declare abstract class BaseAdapter {
    protected options: ISmartServeOptions;
    protected handler: TRequestHandler | null;
    protected stats: IServerStats;
    protected startTime: number;
    constructor(options: ISmartServeOptions);
    /**
     * Runtime name
     */
    abstract get name(): TRuntime;
    /**
     * Adapter characteristics
     */
    abstract get characteristics(): IAdapterCharacteristics;
    /**
     * Check if this adapter is supported in current runtime
     */
    abstract isSupported(): boolean;
    /**
     * Start the server
     */
    abstract start(handler: TRequestHandler): Promise<ISmartServeInstance>;
    /**
     * Stop the server
     */
    abstract stop(): Promise<void>;
    /**
     * Get current server statistics
     */
    getStats(): IServerStats;
    /**
     * Create ISmartServeInstance from adapter
     */
    protected createInstance(): ISmartServeInstance;
    /**
     * Parse URL from request for cross-platform compatibility
     */
    protected parseUrl(request: Request): URL;
    /**
     * Parse query parameters from URL
     */
    protected parseQuery(url: URL): Record<string, string>;
    /**
     * Get HTTP method from request
     */
    protected parseMethod(request: Request): THttpMethod;
    protected resolveWebSocketHeartbeatOptions(defaultEnabled: boolean): IResolvedWebSocketHeartbeatOptions | null;
    private assertPositiveFiniteNumber;
    private normalizeWebSocketHeartbeatPayload;
}
export {};