import { Readable } from 'stream';
import { ProxyData } from '../core/types/index.js';
export interface ProxyResponse {
    data: Buffer | string;
    contentType: string;
    statusCode: number;
    headers?: Record<string, string>;
}
export interface StreamingProxyResponse {
    stream: Readable;
    contentType: string;
    statusCode: number;
    headers: Record<string, string>;
}
export type ProxyResult = ProxyResponse | StreamingProxyResponse;
export declare function isStreamingResponse(response: ProxyResult): response is StreamingProxyResponse;
export declare class ProxyService {
    private isProd;
    private streamPatterns;
    constructor(streamPatterns?: RegExp[]);
    /**
     * Proxy a request to an upstream provider
     * Returns either buffered response or streaming response based on file type
     */
    proxyRequest(encodedData: string): Promise<ProxyResult>;
    /**
     * Determine if a URL should be streamed based on file type
     */
    private shouldStream;
    /**
     * Fetch helper with timeout
     */
    private fetchWithTimeout;
    /**
     * Handle streaming request for large files
     */
    private handleStreamingRequest;
    /**
     * Handle buffered request for small files
     */
    private handleBufferedRequest;
    /**
     * Determine MIME type from URL or content
     */
    private getMimeType;
    /**
     * Decode proxy data parameter
     */
    static decodeProxyData(encodedData: string): ProxyData;
    /**
     * Check if the response is a manifest file that needs rewriting.
     * Makes sure that it is text based, but NOT a subtitle file.
     */
    private isManifestFile;
    /**
     * Rewrite manifest file URLs to go through proxy
     */
    private rewriteManifest;
    private hasUriAttribute;
    private rewriteTagAttributes;
    private isUrlLine;
    private resolveUrl;
    /**
     * Create a proxy URL for a given upstream URL
     * ALWAYS includes headers from the original request
     */
    createProxyUrl(url: string, headers?: Record<string, string>): string;
}
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