import { FoundationElement } from '@microsoft/fast-foundation';
/**
 * Abstract base class for file handling components
 * Provides common functionality for file selection, validation, and UI state management
 * @beta
 *
 * @fires error - Fired when file size validation fails
 * @fires clear - Fired when selection is cleared
 */
export declare abstract class BaseFileComponent extends FoundationElement {
    fileInput: HTMLInputElement;
    protected selectedFile: File | null;
    label: string;
    accept: string;
    fileSizeLimitBytes: number;
    fileName: string;
    isProcessing: boolean;
    /**
     * Opens the file picker dialog
     * Clears any previous file selection before opening
     */
    handleClick(): void;
    /**
     * Handles file selection from the file input
     * Validates file size and sets up for processing
     * @param e - The change event from the file input
     */
    onInputChange(e: Event): void;
    /**
     * Clears all file selection and processing state
     * Resets the component to its initial state
     */
    clearSelection(): void;
    /**
     * Gets the currently selected file object
     * @returns The selected File object or null if no file is selected
     */
    getSelectedFile(): File;
    /**
     * Shows an error notification using the unified error handling system
     * @param title - The error title
     * @param message - The error message
     */
    protected showError(title: string, message: string): void;
    /**
     * Abstract method called when a file is selected
     * @param files - The selected file
     */
    protected abstract onFileSelected(files: File[]): void;
    /**
     * Abstract method called when file selection is cleared
     */
    protected abstract onFileCleared(): void;
}
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