import { ElementRef } from '@angular/core';
import { ControlValueAccessor, FormGroup } from '@angular/forms';
import { TranslateService } from '@ngx-translate/core';
import { AudioPlayerService, Track } from '@sixbell-telco/sdk/components/audio-player';
import { FileExtension } from '../shared/types/file-upload';
import * as i0 from "@angular/core";
/**
 * A customizable drag-and-drop file upload zone with audio playback capabilities
 *
 * @remarks
 * Supports file validation, multi-file uploads, and audio file preview/playback.
 * Implements ControlValueAccessor for Angular form integration.
 *
 * @example
 * ```html
 * <st-file-dropzone
 *   [extensions]="['.mp3', '.wav']"
 *   [maxFiles]="3"
 *   (fileDropped)="handleUpload($event)"
 * ></st-file-dropzone>
 * ```
 *
 * @example
 * ```html
 * <!-- Form integration -->
 * <st-file-dropzone
 *   [parentForm]="mediaForm"
 *   formControlName="attachments"
 *   [multiple]="true"
 * ></st-file-dropzone>
 * ```
 */
export declare class DropzoneComponent implements ControlValueAccessor {
    /** @internal Translation service instance */
    translateService: TranslateService;
    /** @internal Audio player service instance */
    audioService: AudioPlayerService;
    /**
     * Maximum number of allowed files
     * @defaultValue 1
     */
    maxFiles: import("@angular/core").InputSignal<number>;
    /**
     * Maximum file size in bytes (0 for unlimited)
     * @defaultValue 0
     */
    maxFileSize: import("@angular/core").InputSignal<number>;
    /**
     * Whether to display uploaded files list
     * @defaultValue true
     */
    showFiles: import("@angular/core").InputSignal<boolean>;
    /**
     * Allowed file extensions (e.g., ['.pdf', '.mp3'])
     */
    extensions: import("@angular/core").InputSignal<FileExtension[]>;
    /**
     * Whether upload is in progress
     * @defaultValue false
     */
    uploading: import("@angular/core").InputSignal<boolean>;
    /**
     * Whether the component is disabled
     * @defaultValue false
     */
    disabled: import("@angular/core").ModelSignal<boolean>;
    /**
     * Whether multiple files can be uploaded
     * @defaultValue false
     */
    multiple: import("@angular/core").InputSignal<boolean>;
    /**
     * HTML name attribute for the input
     * @defaultValue 'file'
     */
    name: import("@angular/core").InputSignal<string>;
    /**
     * Computed accept attribute for file input
     * @internal
     */
    accept: import("@angular/core").Signal<string>;
    /** @internal Tracks audio player open state */
    opened: import("@angular/core").WritableSignal<boolean>;
    /** @internal Tracks blur events for validation */
    private readonly blurTrigger;
    /**
     * Parent form group for reactive forms
     */
    parentForm: import("@angular/core").InputSignal<FormGroup<any> | null>;
    /**
     * Form control name for reactive forms
     */
    formControlName: import("@angular/core").InputSignal<string>;
    /**
     * Emitted when valid files are dropped/selected
     */
    fileDropped: import("@angular/core").OutputEmitterRef<File[]>;
    /**
     * Emitted when a file is removed
     */
    fileRemoved: import("@angular/core").OutputEmitterRef<File>;
    /**
     * Stop event propagation for activation events
     * @defaultValue false
     */
    stopPropagation: import("@angular/core").InputSignal<boolean>;
    /**
     * Event emitted on click
     */
    clicked: import("@angular/core").OutputEmitterRef<MouseEvent>;
    /**
     * Event emitted on pointer down
     */
    pointerDown: import("@angular/core").OutputEmitterRef<PointerEvent>;
    /**
     * Event emitted on Enter keydown
     */
    keyDownEnter: import("@angular/core").OutputEmitterRef<KeyboardEvent>;
    /**
     * Event emitted on Space keydown
     */
    keyDownSpace: import("@angular/core").OutputEmitterRef<KeyboardEvent>;
    /**
     * Event emitted on activation (click or keyboard)
     */
    triggered: import("@angular/core").OutputEmitterRef<void>;
    /** @internal Current list of uploaded files */
    files: import("@angular/core").WritableSignal<File[]>;
    /** @internal Drag state tracker */
    isDragging: import("@angular/core").WritableSignal<boolean>;
    /** @internal Validation error message */
    errorMessage: import("@angular/core").WritableSignal<string>;
    /** @internal Change callback function */
    private onControlChange;
    /** @internal Touch callback function */
    private onControlTouch;
    /** @internal Reference to file input element */
    fileInput: import("@angular/core").Signal<ElementRef<any> | undefined>;
    /** @internal Material icon references */
    iconDelete: string;
    iconDownload: string;
    iconInsertDriveFile: string;
    iconCloudUpload: string;
    iconError: string;
    iconVisibility: string;
    iconVisibilityOff: string;
    /**
     * Computed audio tracks from uploaded files
     * @internal
     */
    tracks: import("@angular/core").Signal<Track[]>;
    /**
     * Whether to show audio player controls
     * @internal
     */
    addAudioPlayer: import("@angular/core").Signal<boolean>;
    /**
     * Gets track index for audio files
     * @param file - File to check
     * @returns Index in audio tracks array
     * @internal
     */
    getIndexForTracks(file: File): number;
    /**
     * @internal
     * Handle click activation
     */
    handleClick(event: MouseEvent): void;
    /**
     * @internal
     * Handle pointer down activation
     */
    handlePointerDown(event: PointerEvent): void;
    /**
     * @internal
     * Handle Enter key activation
     */
    handleKeyDownEnter(event: Event): void;
    /**
     * @internal
     * Handle Space key activation
     */
    handleKeyDownSpace(event: Event): void;
    /**
     * Handles drag over event
     * @param event - Drag event
     * @internal
     */
    handleDragOver(event: DragEvent): void;
    /**
     * Handles drag leave event
     * @param event - Drag event
     * @internal
     */
    handleDragLeave(event: DragEvent): void;
    /**
     * Handles file drop event
     * @param event - Drag event
     * @internal
     */
    handleDrop(event: DragEvent): void;
    /**
     * Handles file input selection
     * @param event - Input change event
     * @internal
     */
    handleFileSelect(event: Event): void;
    /** @internal Processes and validates uploaded files */
    private processFiles;
    /**
     * Validates file size against maxFileSize
     * @param file - File to validate
     * @returns True if file size is valid
     * @internal
     */
    validateFileSize(file: File): boolean;
    /**
     * Validates file type against allowed extensions
     * @param file - File to validate
     * @returns True if file type is valid
     * @internal
     */
    validateFileType(file: File): boolean;
    /**
     * Handles file download
     * @param file - File to download
     * @internal
     */
    handlefileDownload(file: File): void;
    /**
     * Removes a file from the list
     * @param file - File to remove
     * @internal
     */
    handleRemove(file: File): void;
    /**
     * Checks if a file is an audio file
     * @param file - File to check
     * @returns True if audio file
     * @internal
     */
    checkIfIsAudioFile(file: File): boolean;
    /**
     * Toggles audio player visibility
     * @internal
     */
    handleAudioPlayerOpen(): void;
    /** @internal Cleans up object URLs */
    ngDestroy(): void;
    /**
     * Writes form value to component
     * @param files - Array of files from form control
     */
    writeValue(files: File[]): void;
    /**
     * Registers change callback
     * @param fn - Callback function for value changes
     */
    registerOnChange(fn: (value: File[]) => void): void;
    /**
     * Registers touch callback
     * @param fn - Callback function for touch events
     */
    registerOnTouched(fn: () => void): void;
    /**
     * Sets disabled state
     * @param isDisabled - Whether component is disabled
     */
    setDisabledState(isDisabled: boolean): void;
    /**
     * Triggers file input dialog
     * @internal
     */
    triggerFileInput(): void;
    /** @internal Form control reference */
    private readonly formControl;
    /** @internal Form control observable */
    private readonly formControl$;
    /** @internal Status changes observable */
    private readonly statusChanges$;
    /** @internal Value changes observable */
    private readonly stateChanges$;
    /** @internal Status signal */
    private readonly statusSignal;
    /** @internal State signal */
    private readonly stateSignal;
    /**
     * Handles blur events for validation
     * @internal
     */
    handleBlur(): void;
    /**
     * Computes CSS classes for dropzone based on state
     * @internal
     */
    dropzoneClass: import("@angular/core").Signal<string>;
    static ɵfac: i0.ɵɵFactoryDeclaration<DropzoneComponent, never>;
    static ɵcmp: i0.ɵɵComponentDeclaration<DropzoneComponent, "st-file-dropzone", never, { "maxFiles": { "alias": "maxFiles"; "required": false; "isSignal": true; }; "maxFileSize": { "alias": "maxFileSize"; "required": false; "isSignal": true; }; "showFiles": { "alias": "showFiles"; "required": false; "isSignal": true; }; "extensions": { "alias": "extensions"; "required": true; "isSignal": true; }; "uploading": { "alias": "uploading"; "required": false; "isSignal": true; }; "disabled": { "alias": "disabled"; "required": false; "isSignal": true; }; "multiple": { "alias": "multiple"; "required": false; "isSignal": true; }; "name": { "alias": "name"; "required": false; "isSignal": true; }; "parentForm": { "alias": "parentForm"; "required": false; "isSignal": true; }; "formControlName": { "alias": "formControlName"; "required": false; "isSignal": true; }; "stopPropagation": { "alias": "stopPropagation"; "required": false; "isSignal": true; }; }, { "disabled": "disabledChange"; "fileDropped": "fileDropped"; "fileRemoved": "fileRemoved"; "clicked": "clicked"; "pointerDown": "pointerDown"; "keyDownEnter": "keyDownEnter"; "keyDownSpace": "keyDownSpace"; "triggered": "triggered"; }, never, ["*"], true, never>;
}