import * as _angular_core from '@angular/core';
import { ElementRef } from '@angular/core';
import { ControlValueAccessor } from '@angular/forms';

/**
 * @license
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://github.com/thekhegay/ngwr/blob/main/LICENSE
 */
/** Why a dropped / picked file was rejected. */
type WrFileUploadRejectionReason = 'type' | 'size' | 'count';
/** A single rejected file + the reason. Emitted via `(rejected)`. */
interface WrFileUploadRejection {
    readonly file: File;
    readonly reason: WrFileUploadRejectionReason;
}

/** Human-readable byte size (e.g. `1.2 MB`). */
declare function formatBytes(bytes: number): string;
/**
 * Drag-and-drop file upload zone. Click to browse, drag-and-drop to add,
 * with an optional file list + remove buttons.
 *
 * Implements `ControlValueAccessor` — value is `File | File[] | null`
 * (single or array, governed by `multiple`).
 *
 * @example
 * ```html
 * <wr-file-upload [(ngModel)]="files" [multiple]="true" accept="image/*" />
 * <wr-file-upload [(ngModel)]="avatar" accept=".png,.jpg" [maxSize]="2 * 1024 * 1024" />
 * ```
 *
 * @see https://ngwr.dev/components/file-upload
 */
declare class WrFileUpload implements ControlValueAccessor {
    /** Allow multiple files. Single mode replaces on each add. @default false */
    readonly multiple: _angular_core.InputSignalWithTransform<boolean, any>;
    /** `accept` attribute — comma-separated MIME types or extensions. @default '' */
    readonly accept: _angular_core.InputSignal<string>;
    /** Max bytes per file. `0` disables the check. @default 0 */
    readonly maxSize: _angular_core.InputSignalWithTransform<number, unknown>;
    /** Max files (multi mode only). `0` disables the check. @default 0 */
    readonly maxFiles: _angular_core.InputSignalWithTransform<number, unknown>;
    /** Render the picked-files list below the zone. @default true */
    readonly showList: _angular_core.InputSignalWithTransform<boolean, any>;
    /** Disable interaction. @default false */
    readonly disabled: _angular_core.InputSignalWithTransform<boolean, any>;
    /** Primary call-to-action label. Falls back to `fileUpload.browse`. */
    readonly pickLabel: _angular_core.InputSignal<string | null>;
    /** Secondary instruction below the CTA. Falls back to `fileUpload.dropZone`. */
    readonly dropLabel: _angular_core.InputSignal<string | null>;
    /** Drop-zone host aria-label. Falls back to `fileUpload.dropZoneLabel`. */
    readonly dropZoneLabel: _angular_core.InputSignal<string | null>;
    /** Remove-file button aria-label. Falls back to `fileUpload.removeFile`. */
    readonly removeFileLabel: _angular_core.InputSignal<string | null>;
    protected readonly resolvedPick: _angular_core.Signal<string>;
    protected readonly resolvedDrop: _angular_core.Signal<string>;
    protected readonly resolvedDropZone: _angular_core.Signal<string>;
    protected readonly resolvedRemove: _angular_core.Signal<string>;
    /** Optional helper text shown below the labels (e.g. accepted formats). */
    readonly helperText: _angular_core.InputSignal<string>;
    /** Emitted when files are rejected for type / size / count reasons. */
    readonly rejected: _angular_core.OutputEmitterRef<readonly WrFileUploadRejection[]>;
    protected readonly picker: _angular_core.Signal<ElementRef<HTMLInputElement>>;
    protected readonly files: _angular_core.WritableSignal<readonly File[]>;
    protected readonly dragging: _angular_core.WritableSignal<boolean>;
    private readonly disabledFromCva;
    protected readonly effectiveDisabled: _angular_core.Signal<boolean>;
    protected readonly classes: _angular_core.Signal<string>;
    protected readonly formatBytes: typeof formatBytes;
    private onChange;
    private onTouched;
    writeValue(value: File | readonly File[] | null): void;
    registerOnChange(fn: (value: File | readonly File[] | null) => void): void;
    registerOnTouched(fn: () => void): void;
    setDisabledState(isDisabled: boolean): void;
    protected openPicker(): void;
    protected onZoneKey(event: KeyboardEvent): void;
    protected onPickerChange(event: Event): void;
    protected onDragEnter(event: DragEvent): void;
    protected onDragOver(event: DragEvent): void;
    protected onDragLeave(event: DragEvent): void;
    protected onDrop(event: DragEvent): void;
    protected removeAt(index: number): void;
    private acceptFiles;
    private reject;
    private emit;
    static ɵfac: _angular_core.ɵɵFactoryDeclaration<WrFileUpload, never>;
    static ɵcmp: _angular_core.ɵɵComponentDeclaration<WrFileUpload, "wr-file-upload", never, { "multiple": { "alias": "multiple"; "required": false; "isSignal": true; }; "accept": { "alias": "accept"; "required": false; "isSignal": true; }; "maxSize": { "alias": "maxSize"; "required": false; "isSignal": true; }; "maxFiles": { "alias": "maxFiles"; "required": false; "isSignal": true; }; "showList": { "alias": "showList"; "required": false; "isSignal": true; }; "disabled": { "alias": "disabled"; "required": false; "isSignal": true; }; "pickLabel": { "alias": "pickLabel"; "required": false; "isSignal": true; }; "dropLabel": { "alias": "dropLabel"; "required": false; "isSignal": true; }; "dropZoneLabel": { "alias": "dropZoneLabel"; "required": false; "isSignal": true; }; "removeFileLabel": { "alias": "removeFileLabel"; "required": false; "isSignal": true; }; "helperText": { "alias": "helperText"; "required": false; "isSignal": true; }; }, { "rejected": "rejected"; }, never, never, true, never>;
}

export { WrFileUpload };
export type { WrFileUploadRejection, WrFileUploadRejectionReason };