/**
 * Multimodal - AI SDK Wrapper
 *
 * Provides utilities for multimodal inputs (images, files, PDFs).
 */
export type InputPart = TextPart | ImagePart | FilePart | PdfPart;
export interface TextPart {
    type: 'text';
    text: string;
}
export interface ImagePart {
    type: 'image';
    /** Image data as URL, base64 string, or Uint8Array */
    image: string | Uint8Array | URL;
    /** MIME type (auto-detected if not provided) */
    mimeType?: string;
}
export interface FilePart {
    type: 'file';
    /** File data as URL, base64 string, or Uint8Array */
    data: string | Uint8Array | URL;
    /** MIME type (required) */
    mimeType: string;
    /** File name (optional) */
    name?: string;
}
export interface PdfPart {
    type: 'pdf';
    /** PDF data as URL, base64 string, or Uint8Array */
    data: string | Uint8Array | URL;
    /** Page range to extract (optional) */
    pages?: {
        start?: number;
        end?: number;
    };
    /** Extract text only (default: false) */
    textOnly?: boolean;
}
/**
 * Create a text part.
 */
export declare function createTextPart(text: string): TextPart;
/**
 * Create an image part from various sources.
 *
 * @example From URL
 * ```typescript
 * const imagePart = createImagePart('https://example.com/image.png');
 * ```
 *
 * @example From base64
 * ```typescript
 * const imagePart = createImagePart('data:image/png;base64,...');
 * ```
 *
 * @example From file path
 * ```typescript
 * const imagePart = await createImagePart('./image.png');
 * ```
 */
export declare function createImagePart(source: string | Uint8Array | URL, mimeType?: string): ImagePart;
/**
 * Create a file part from various sources.
 *
 * @example
 * ```typescript
 * const filePart = createFilePart('./document.txt', 'text/plain');
 * ```
 */
export declare function createFilePart(source: string | Uint8Array | URL, mimeType: string, name?: string): FilePart;
/**
 * Create a PDF part from various sources.
 *
 * @example
 * ```typescript
 * const pdfPart = createPdfPart('./document.pdf');
 * ```
 *
 * @example With page range
 * ```typescript
 * const pdfPart = createPdfPart('./document.pdf', { pages: { start: 1, end: 5 } });
 * ```
 */
export declare function createPdfPart(source: string | Uint8Array | URL, options?: {
    pages?: {
        start?: number;
        end?: number;
    };
    textOnly?: boolean;
}): PdfPart;
/**
 * Convert input parts to AI SDK message content format.
 */
export declare function toMessageContent(parts: InputPart[]): any[];
/**
 * Create a multimodal message with text and images.
 *
 * @example
 * ```typescript
 * const message = createMultimodalMessage(
 *   'What is in this image?',
 *   ['https://example.com/image.png']
 * );
 * ```
 */
export declare function createMultimodalMessage(text: string, images: (string | Uint8Array | URL)[], role?: 'user' | 'assistant'): {
    role: string;
    content: any[];
};
/**
 * Convert a base64 string to Uint8Array.
 */
export declare function base64ToUint8Array(base64: string): Uint8Array;
/**
 * Convert Uint8Array to base64 string.
 */
export declare function uint8ArrayToBase64(bytes: Uint8Array): string;
/**
 * Check if a string is a valid URL.
 */
export declare function isUrl(str: string): boolean;
/**
 * Check if a string is a data URL.
 */
export declare function isDataUrl(str: string): boolean;