import type { Channel } from '../types';
/**
 * Extract EPG URL from M3U playlist header
 * M3U format: #EXTM3U url-tvg="http://example.com/epg.xml"
 * @param content - M3U playlist content as string
 * @returns EPG URL if found, undefined otherwise
 */
export declare function extractEPGUrlFromM3U(content: string): string | undefined;
/**
 * Parse M3U playlist content into Channel array
 * @param content - M3U playlist content as string
 * @param providerId - ID of the provider this playlist belongs to
 * @returns Array of Channel objects
 * @throws Error if content is invalid or exceeds limits
 */
export declare function parseM3U(content: string, providerId: string): Channel[];
/**
 * Options for fetching M3U playlists
 */
export interface FetchM3UOptions {
    /**
     * Proxy URL for HTTP requests (useful for iOS which blocks HTTP fetch)
     * The proxy should accept a `url` query parameter
     * Example: https://web.visioo.online/api/proxy/m3u
     */
    proxyUrl?: string;
}
/**
 * Fetch M3U playlist from URL and parse it
 * @param url - URL to fetch M3U playlist from
 * @param providerId - ID of the provider
 * @param options - Optional configuration (e.g., proxy URL)
 * @returns Object with channels and EPG URL (if found)
 * @throws Error if fetch fails or content is invalid
 */
export declare function fetchAndParseM3U(url: string, providerId: string, options?: FetchM3UOptions): Promise<{
    channels: Channel[];
    epgUrl?: string;
}>;
/**
 * Validate if a string is a valid M3U playlist
 * @param content - Content to validate
 * @returns true if valid M3U, false otherwise
 */
export declare function isValidM3U(content: string): boolean;
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