/**
 * TyFileUpload Web Component — drop zone + file picker primitive. Replaces
 * `<input type="file">` with a styleable, drag-and-drop-capable equivalent.
 * Form-associated: participates in FormData and form.reset().
 */
import { TyComponent } from "../base/ty-component.js";
import type { PropertyChange } from "../utils/property-manager.js";
interface FileUploadState {
    listenersSetup: boolean;
}
export interface TyFileUploadElement extends HTMLElement {
    multiple: boolean;
    accept: string;
    name: string;
    disabled: boolean;
    required: boolean;
    label: string;
    placeholder: string;
    error: string;
    files: File[];
    form: HTMLFormElement | null;
}
export declare class TyFileUpload extends TyComponent<FileUploadState> implements TyFileUploadElement {
    static formAssociated: boolean;
    protected static properties: {
        multiple: {
            type: "boolean";
            visual: boolean;
            default: boolean;
        };
        accept: {
            type: "string";
            visual: boolean;
            default: string;
        };
        name: {
            type: "string";
            default: string;
        };
        disabled: {
            type: "boolean";
            visual: boolean;
            default: boolean;
        };
        required: {
            type: "boolean";
            visual: boolean;
            default: boolean;
        };
        label: {
            type: "string";
            visual: boolean;
            default: string;
        };
        placeholder: {
            type: "string";
            visual: boolean;
            default: string;
        };
        error: {
            type: "string";
            visual: boolean;
            default: string;
        };
    };
    private _files;
    private _isDragging;
    private _listenersSetup;
    private _dropZoneClickHandler;
    private _dropZoneKeydownHandler;
    private _dropZoneFocusHandler;
    private _dropZoneBlurHandler;
    private _dragoverHandler;
    private _dragleaveHandler;
    private _dropHandler;
    private _inputChangeHandler;
    constructor();
    protected onConnect(): void;
    protected onDisconnect(): void;
    protected onPropertiesChanged(_changes: PropertyChange[]): void;
    protected onFormReset(): void;
    protected getFormValue(): FormData | string | null;
    /**
     * Match a file against the `accept` attribute the way native inputs do:
     * comma-separated list of `.ext`, `type/subtype` or `type/*` entries.
     * No/blank accept matches everything.
     */
    private matchesAccept;
    get files(): File[];
    get multiple(): boolean;
    set multiple(v: boolean);
    get accept(): string;
    set accept(v: string);
    get name(): string;
    set name(v: string);
    get disabled(): boolean;
    set disabled(v: boolean);
    get required(): boolean;
    set required(v: boolean);
    get label(): string;
    set label(v: string);
    get placeholder(): string;
    set placeholder(v: string);
    get error(): string;
    set error(v: string);
    get form(): HTMLFormElement | null;
    private setFiles;
    private removeFile;
    private setupEventListeners;
    private removeEventListeners;
    private buildDropZoneClasses;
    private renderFileList;
    protected render(): void;
}
export {};