/**
 * PDF Chunker Utility
 *
 * Splits large PDFs into smaller chunks that fit within Gemini's limits:
 * - Max 50MB per file
 * - Max 1000 pages per file
 *
 * Uses pdf-lib for pure JavaScript PDF manipulation (no system dependencies).
 */
/**
 * Gemini file limits
 */
export declare const GEMINI_LIMITS: {
    maxFileSizeBytes: number;
    maxPages: number;
    chunkPages: number;
    chunkSizeBytes: number;
};
/**
 * Result of PDF analysis
 */
export interface PdfAnalysis {
    filePath: string;
    fileName: string;
    fileSize: number;
    pageCount: number;
    needsChunking: boolean;
    estimatedChunks: number;
    reason?: string;
}
/**
 * Result of PDF chunking
 */
export interface PdfChunk {
    chunkIndex: number;
    totalChunks: number;
    filePath: string;
    fileName: string;
    pageStart: number;
    pageEnd: number;
    pageCount: number;
    fileSize: number;
}
/**
 * Result of chunking operation
 */
export interface ChunkingResult {
    success: boolean;
    originalFile: string;
    chunks: PdfChunk[];
    totalPages: number;
    error?: string;
}
/**
 * Analyze a PDF to determine if it needs chunking
 */
export declare function analyzePdf(filePath: string): Promise<PdfAnalysis>;
/**
 * Split a PDF into chunks
 */
export declare function chunkPdf(filePath: string): Promise<ChunkingResult>;
/**
 * Clean up chunk files after upload
 */
export declare function cleanupChunks(chunks: PdfChunk[]): Promise<void>;