import { type DragEvent, type ClipboardEvent } from 'react';
import { type ChatDraftAttachment } from '../stores/chatDraftStore';
export type FileAttachmentType = 'image' | 'pdf' | 'text' | 'binary';
export type FileUploadStatus = 'uploading' | 'ready' | 'failed';
export interface UploadedAttachment {
    id: string;
    filename: string;
    mimeType: string;
    size: number;
    sha256: string;
    kind: FileAttachmentType;
    originalPath: string;
    originalUrl: string;
    metadataUrl: string;
    status: 'ready';
}
export interface FileAttachment {
    id: string;
    file: File;
    type: FileAttachmentType;
    name: string;
    preview?: string;
    data?: string;
    mediaType: string;
    textContent?: string;
    uploadStatus: FileUploadStatus;
    uploadedAttachment?: UploadedAttachment;
    uploadError?: string;
}
export declare const DEFAULT_MAX_FILE_SIZE_MB = 5;
export declare const DEFAULT_MAX_TOTAL_SIZE_MB = 20;
export type StagedFileValidation = {
    ok: true;
} | {
    ok: false;
    reason: 'file' | 'total';
    message: string;
};
export declare function validateStagedFile(file: File, stagedBytes: number, options: {
    maxSizeMB: number;
    maxTotalSizeMB: number;
}): StagedFileValidation;
interface UseFileUploadOptions {
    maxFiles?: number;
    maxSizeMB?: number;
    maxTotalSizeMB?: number;
    pageWide?: boolean;
    supportsImages?: boolean;
    supportsFileAttachments?: boolean;
    sessionId?: string;
    draftKey?: string;
    onError?: (message: string) => void;
}
export declare function useFileUpload(options?: UseFileUploadOptions): {
    files: FileAttachment[];
    images: FileAttachment[];
    documents: FileAttachment[];
    isDragging: boolean;
    error: string;
    addFiles: (inputFiles: FileList | File[]) => Promise<void>;
    restoreFiles: (attachments: ChatDraftAttachment[]) => void;
    removeFile: (id: string) => void;
    clearFiles: () => void;
    handleDragEnter: (e: DragEvent) => void;
    handleDragLeave: (e: DragEvent) => void;
    handleDragOver: (e: DragEvent) => void;
    handleDrop: (e: DragEvent) => void;
    handlePaste: (e: ClipboardEvent) => void;
};
export {};
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