/**-----------------------------------------------------------------------------------------
* Copyright © 2026 Progress Software Corporation. All rights reserved.
* Licensed under commercial license. See LICENSE.md in the project root for more information
*-------------------------------------------------------------------------------------------*/
import { AfterViewInit, ElementRef, EventEmitter, NgZone, OnDestroy, OnInit, Renderer2, SimpleChanges, ViewContainerRef } from '@angular/core';
import { SpeechToTextButtonSettings } from '@progress/kendo-angular-buttons';
import { LocalizationService } from '@progress/kendo-angular-l10n';
import { ContextMenuComponent, ContextMenuPopupEvent } from '@progress/kendo-angular-menu';
import { SelectEvent } from '@progress/kendo-angular-upload';
import { LicenseMessage } from '@progress/kendo-licensing';
import { SVGIcon } from '@progress/kendo-svg-icons';
import { FileSelectButtonSettings } from '../promptbox/common/models';
import { ExecuteActionEvent, FileAction, FileActionEvent, FileDownloadEvent, FilesLayoutMode, Message, MessageSettings, ResendMessageEvent, SendButtonSettings, SendMessageEvent } from './api';
import { ChatFile } from './api/chat-file-interface';
import { ChatLoadMoreEvent } from './api/chat-load-more-event';
import { ChatReferencedMessageClickEvent } from './api/chat-referenced-message-click-event';
import { ChatSuggestion } from './api/chat-suggestion.interface';
import { MessageAction, MessageActionEvent } from './api/message-action';
import { MessageBoxSettings, MessageBoxType } from './api/message-box';
import { MessageWidthMode } from './api/message-width-mode';
import { ScrollMode } from './api/scroll-mode';
import { QuickActionsLayoutMode, SuggestionsLayoutMode } from './api/suggestions-layout';
import { TimestampVisibilityMode } from './api/timestamp-visibility';
import { AuthorMessageContentTemplateDirective, AuthorMessageTemplateDirective, MessageContentTemplateDirective, MessageTemplateDirective, NoDataTemplateDirective, ReceiverMessageContentTemplateDirective, ReceiverMessageTemplateDirective } from './chat.directives';
import { ChatService } from './common/chat.service';
import { ConversationalUIModelFields } from './common/models/model-fields';
import { EndlessScrollState } from './common/endless-scroll-state';
import { MessageBoxComponent } from './message-box.component';
import { AttachmentTemplateDirective } from './templates/attachment-template.directive';
import { ChatHeaderTemplateDirective } from './templates/header-template.directive';
import { ChatMessageBoxEndAffixTemplateDirective } from './templates/message-box-end-affix-template.directive';
import { ChatMessageBoxStartAffixTemplateDirective } from './templates/message-box-start-affix-template.directive';
import { ChatMessageBoxTopAffixTemplateDirective } from './templates/message-box-top-affix-template.directive';
import { ChatMessageBoxTemplateDirective } from './templates/message-box.directive';
import { ChatStatusTemplateDirective } from './templates/status-template.directive';
import { ChatSuggestionTemplateDirective } from './templates/suggestion-template.directive';
import { ChatTimestampTemplateDirective } from './templates/timestamp-template.directive';
import { ChatUserStatusTemplateDirective } from './templates/user-status-template.directive';
import * as i0 from "@angular/core";
/**
 * Represents the [Kendo UI Chat component for Angular](https://www.telerik.com/kendo-angular-ui/components/conversational-ui/chat).
 *
 * Provides a conversational UI for chat-based applications.
 * Supports message templates, attachments, localization, and user actions.
 *
 * @example
 * ```html
 * <kendo-chat
 *   [messages]="messages"
 *   [authorId]="authorId"
 *   (sendMessage)="onSendMessage($event)"
 *   (executeAction)="onExecuteAction($event)">
 * </kendo-chat>
 * ```
 *
 * @remarks
 * Supported children components are: {@link CustomMessagesComponent}, {@link HeroCardComponent}.
 */
export declare class ChatComponent implements OnInit, AfterViewInit, OnDestroy {
    private localization;
    private zone;
    private renderer;
    private element;
    private chatService;
    /**
     * Sets the Chat messages.
     * Accepts an array of `Message` objects, but can also accept custom data types.
     * For more information, check [Data Binding](https://www.telerik.com/kendo-angular-ui/components/conversational-ui/chat/data-binding) section in the documentation.
     */
    messages: any[];
    /**
     * Sets the ID that represents the local user.
     */
    authorId: string | number;
    /**
     * Determines the type of input used in the message box.
     * ([see example](https://www.telerik.com/kendo-angular-ui/components/conversational-ui/chat/message)).
     * @default 'textarea'
     *
     * @hidden
     */
    messageBoxType: MessageBoxType;
    /**
     * Sets the height of the Chat component.
     * Accepts a string with CSS units (for example, `'400px'`, `'50%'`) or a number (interpreted as pixels).
     * The minimum height is `600px`.
     */
    height: string | number;
    /**
     * Sets the width of the Chat component.
     * Accepts a string with CSS units (for example, `'400px'`, `'50%'`) or a number (interpreted as pixels).
     * The minimum width is `320px`.
     */
    width: string | number;
    /**
     * Sets the placeholder text for the message input box.
     */
    placeholder: string;
    /**
     * Controls the width of the message between the predefined options.
     *
     * @default 'standard'
     */
    messageWidthMode: MessageWidthMode;
    /**
     * Controls the visibility of timestamps in messages.
     *
     * @default 'focus'
     */
    timestampVisibility: TimestampVisibilityMode;
    /**
     * Controls the visibility of usernames in messages.
     * When set to `true`, the username displays above each message bubble.
     *
     * @default true
     */
    showUsername: boolean;
    /**
     * Controls the avatar visibility for the messages.
     * When set to `true`, the user avatar displays next to each message bubble.
     *
     * @default true
     */
    showAvatar: boolean;
    /**
     * Enables the expand or collapse functionality for messages.
     *
     * @default false
     */
    allowMessageCollapse: boolean;
    /**
     * Sets the Speech to Text button settings.
     *
     * @default true
     */
    speechToTextButton: boolean | SpeechToTextButtonSettings;
    /**
     * Sets the File Select Button settings.
     *
     * @default true
     */
    fileSelectButton: boolean | FileSelectButtonSettings;
    /**
     * Sets the message box settings.
     */
    messageBoxSettings: MessageBoxSettings;
    /**
     * Sets the actions of the message toolbar.
     * These actions display in the message toolbar and let you perform specific operations on the message.
     *
     * @default []
     */
    messageToolbarActions: MessageAction[];
    /**
     * Sets the value of the Message Box.
     *
     * @default ''
     */
    inputValue: string;
    /**
     * Sets the settings for the author's messages.
     */
    authorMessageSettings: MessageSettings;
    /**
     * Sets the settings for the receivers' messages.
     */
    receiverMessageSettings: MessageSettings;
    /**
     * Sets the default actions that display in the message context menu.
     *
     * @default [{ id: 'copy', label: 'Copy', icon: 'copy', svgIcon: copyIcon, disabled: false }, { id: 'reply', label: 'Reply', icon: 'undo', svgIcon: undoIcon, disabled: false }]
     */
    defaultContextMenuActions: MessageAction[];
    /**
     * Sets the actions that display in the message as a context menu.
     * These actions display as menu items and let you perform specific operations on the message.
     * The default actions are `copy` and `reply` and are defined by their `id`.
     */
    set messageContextMenuActions(actions: MessageAction[] | null);
    get messageContextMenuActions(): MessageAction[];
    /**
     * Sets the default actions that display in the file actions DropDownButton.
     *
     * @default [{ id: 'download', label: 'Download', icon: 'download', svgIcon: downloadIcon, disabled: false }]
     */
    defaultFileActions: FileAction[];
    /**
     * Sets the actions that display in the file as items of a DropDownButton.
     * These actions display when you click the file DropDownButton and let you perform specific operations on the file.
     * The default action is `download` and is defined by its `id`.
     *
     * @default [{ id: 'download', label: 'Download', icon: 'download', svgIcon: downloadIcon, disabled: false }]
     */
    set fileActions(actions: FileAction[] | null);
    get fileActions(): FileAction[];
    /**
     * Sets the layout of the files in the message bubble.
     *
     * @default 'vertical'
     */
    set messageFilesLayout(layout: FilesLayoutMode);
    /**
     * Sets the layout of the suggestions above the message input box.
     *
     * @default 'scroll'
     */
    set suggestionsLayout(layoutMode: SuggestionsLayoutMode);
    /**
     * Sets the layout of the quick actions suggested below the messages.
     *
     * @default 'scroll'
     */
    set quickActionsLayout(layoutMode: QuickActionsLayoutMode);
    /**
     * Sets the suggestions that display in the message input box.
     * Suggestions display as a list of clickable items that let you quickly insert predefined text into the message input.
     *
     * @default []
     */
    suggestions: ChatSuggestion[];
    /**
     * Sets the send button settings for the Chat component.
     * Allows customization of the send button appearance, icons and disabled state.
     *
     * @default true
     */
    sendButton: boolean | SendButtonSettings;
    /**
     * @hidden
     */
    set sendButtonSettings(value: boolean | SendButtonSettings);
    get sendButtonSettings(): boolean | SendButtonSettings;
    /**
     * Controls the scrolling behavior of the message list.
     *
     * @default 'scrollable'
     */
    scrollMode: ScrollMode;
    /**
     * Sets the number of messages loaded per page in endless scroll mode.
     * Ignored in `scrollable` mode.
     *
     * @default 50
     */
    pageSize: number;
    /**
     * Sets the minimum distance from the top of the visible message area that prevents auto-scrolling when a new receiver message arrives.
     * Accepts a percentage string (for example, `'30%'`) or a pixel value as a number. Set to `0` to always auto-scroll to new messages.
     *
     * Has no effect on author messages, which always scroll to the bottom.
     *
     * For more details, refer to the [Auto-Scroll Threshold](slug:scroll_modes_chat#auto-scroll-threshold) article.
     *
     * @default '20%'
     */
    autoScrollThreshold: number | string;
    /**
     * Sets the total number of messages in the conversation when using endless scrolling with remote data source. For more details, refer to the [Endless Scrolling with Remote Data](slug:scroll_modes_chat#remote-data) section in the documentation.
     */
    total: number;
    /**
     * Sets the index of the first message in the currently loaded batch within the full conversation.
     * Used with remote data sources in endless scroll mode to compute the range for the next [`loadMore`](slug:api_conversational-ui_chatcomponent#loadMore) call.
     * For more details, refer to the [Endless Scrolling with Remote Data](slug:scroll_modes_chat#remote-data) section in the documentation.
     */
    startIndex: number;
    /**
     * Sets the exclusive end index of the currently loaded batch within the full conversation.
     * Used with remote data sources in endless scroll mode to determine whether more messages exist beyond the current batch.
     * For more details, refer to the [Endless Scrolling with Remote Data](slug:scroll_modes_chat#remote-data) section in the documentation.
     */
    endIndex: number;
    /**
     * Sets the full set of pinned messages in the conversation.
     * Used with remote data sources in endless scroll mode to render the pinned message indicator when the pinned message is outside the currently loaded batch.
     * For more details, refer to the [Endless Scrolling with Remote Data](slug:scroll_modes_chat#remote-data) section in the documentation.
     *
     * @default []
     */
    pinnedMessages: Message[];
    /**
     * Sets the messages that serve as reply targets for messages in the currently loaded batch but exist outside it.
     * Used with remote data sources in endless scroll mode to render reply previews when the replied-to message is not in the current batch.
     * For more details, refer to the [Endless Scrolling with Remote Data](slug:scroll_modes_chat#remote-data) section in the documentation.
     *
     * @default []
     */
    repliedToMessages: Message[];
    /**
     * Sets the names of the model fields from which the Chat reads its data.
     * Lets you map custom data types to the expected `Message` format.
     */
    set modelFields(value: ConversationalUIModelFields);
    get modelFields(): ConversationalUIModelFields;
    /**
     * Controls whether a scroll to bottom button is rendered at the bottom of the Chat. Displayed only when the user has scrolled the component upward.
     *
     * @default true
     */
    scrollToBottomButton: boolean;
    /**
     * Sets the loading state of the Chat component.
     * When set to `true`, a loading button is displayed instead of the send button.
     *
     * @default false
     */
    loading: boolean;
    /**
     * Fires when the user sends a message by clicking the **Send** button or pressing **Enter**.
     *
     * The message is not automatically added to the `messages` array.
     */
    sendMessage: EventEmitter<SendMessageEvent>;
    /**
     * Fires when the user clicks the resend button on a failed message.
     */
    resendMessage: EventEmitter<ResendMessageEvent>;
    /**
     * Fires when the user clicks a quick action button in the message toolbar.
     */
    toolbarActionClick: EventEmitter<MessageActionEvent>;
    /**
     * Fires when the user clicks an action in the message context menu.
     */
    contextMenuActionClick: EventEmitter<MessageActionEvent>;
    /**
     * Fires when the user clicks an action in the file context menu.
     */
    fileActionClick: EventEmitter<FileActionEvent>;
    /**
     * Fires when the user clicks an action in the file context menu.
     */
    download: EventEmitter<FileDownloadEvent>;
    /**
     * Fires when the user clicks a quick action button.
     * The Chat internally handles [known actions](https://www.telerik.com/kendo-angular-ui/components/conversational-ui/api/actiontype) such as `reply`, `openUrl`, and `call`.
     *
     * The event is preventable. Calling [`preventDefault`](https://developer.mozilla.org/en-US/docs/Web/API/Event/preventDefault) suppresses the built-in action.
     */
    executeAction: EventEmitter<ExecuteActionEvent>;
    /**
     * Fires when the user clicks a suggestion in the message input box.
     */
    suggestionExecute: EventEmitter<ChatSuggestion>;
    /**
     * Fires when the user selects a file in the message input box.
     */
    fileSelect: EventEmitter<SelectEvent>;
    /**
     * Fires when the user removes a file from the message input box.
     */
    fileRemove: EventEmitter<ChatFile>;
    /**
     * Fires when the user unpins the pinned message.
     * This event triggers when the user clicks the delete button on the pinned message.
     */
    unpin: EventEmitter<Message>;
    /**
     * Fires when the user types in the message input box.
     */
    inputValueChange: EventEmitter<string>;
    /**
     * Fires when the user scrolls near the edge of the rendered message window in endless scroll mode.
     */
    loadMore: EventEmitter<ChatLoadMoreEvent>;
    /**
     * Fires when the user clicks a referenced message (pinned indicator or reply preview).
     */
    referencedMessageClick: EventEmitter<ChatReferencedMessageClickEvent>;
    get className(): string;
    get dirAttr(): string;
    set messagesContextMenu(contextMenu: ContextMenuComponent);
    attachmentTemplate: AttachmentTemplateDirective;
    chatHeaderTemplate: ChatHeaderTemplateDirective;
    chatNoDataTemplate: NoDataTemplateDirective;
    authorMessageContentTemplate: AuthorMessageContentTemplateDirective;
    receiverMessageContentTemplate: ReceiverMessageContentTemplateDirective;
    messageContentTemplate: MessageContentTemplateDirective;
    authorMessageTemplate: AuthorMessageTemplateDirective;
    receiverMessageTemplate: ReceiverMessageTemplateDirective;
    messageTemplate: MessageTemplateDirective;
    timestampTemplate: ChatTimestampTemplateDirective;
    suggestionTemplate: ChatSuggestionTemplateDirective;
    statusTemplate: ChatStatusTemplateDirective;
    messageBoxTemplate: ChatMessageBoxTemplateDirective;
    messageBoxStartAffixTemplate: ChatMessageBoxStartAffixTemplateDirective;
    messageBoxEndAffixTemplate: ChatMessageBoxEndAffixTemplateDirective;
    messageBoxTopAffixTemplate: ChatMessageBoxTopAffixTemplateDirective;
    userStatusTemplate: ChatUserStatusTemplateDirective;
    messageBox: MessageBoxComponent;
    /**
     * @hidden
     */
    messageList: ViewContainerRef;
    /**
     * @hidden
     * Returns processed messages when model fields are used, otherwise returns original messages.
     */
    get processedMessages(): Message[];
    /**
     * @hidden
     * Returns `true` when the Chat is in remote endless scroll mode.
     * Remote mode is active whenever the consumer provides a `total`.
     */
    get isRemoteMode(): boolean;
    /**
     * @hidden
     * Returns the messages to render — sliced in endless mode, full in scrollable mode.
     * In remote mode, returns processedMessages as-is (consumer already provides only the current batch).
     */
    get renderedMessages(): Message[];
    /**
     * @hidden
     */
    isOwnMessage(message: Message): boolean;
    /**
     * Gets the actions available in the message context menu.
     *
     * @hidden
     */
    get contextMenuActions(): any[];
    /**
     * @hidden
     */
    get localizationText(): LocalizationService;
    /**
     * @hidden
     */
    autoScroll: boolean;
    /**
     * @hidden
     */
    pinIcon: SVGIcon;
    /**
     * @hidden
     */
    deleteIcon: SVGIcon;
    /**
     * @hidden
     */
    pinnedMessage: Message;
    /**
     * @hidden
     */
    scrollToBottomIcon: SVGIcon;
    /**
     * @hidden
     */
    endlessState: EndlessScrollState;
    /**
     * @hidden
     */
    showLicenseWatermark: boolean;
    /**
     * @hidden
     */
    licenseMessage?: LicenseMessage;
    private anchor;
    private direction;
    private subs;
    private _modelFields;
    private _messageContextMenuActions;
    private _fileActions;
    private _cachedProcessedMessages;
    private _lastMessagesReference;
    private _lastModelFields;
    private _cachedContextMenuActions;
    private _lastContextMenuActionsReference;
    private _previousMessagesLength;
    private _previousLastMessageId;
    private _hasProcessedMessages;
    private _pendingScrollAction;
    private _scrollHandledBeforePaint;
    private _lastNewMessageId;
    private _cachedRenderedMessages;
    private _renderedMessagesSource;
    private _renderedMessagesStart;
    private _renderedMessagesEnd;
    private _pendingRemoteScrollToMessageId;
    private _remoteScrollToBottom;
    constructor(localization: LocalizationService, zone: NgZone, renderer: Renderer2, element: ElementRef, chatService: ChatService);
    /**
     * @hidden
     */
    ngOnInit(): void;
    /**
     * @hidden
     */
    ngOnChanges(changes: SimpleChanges): void;
    /**
     * @hidden
     */
    ngAfterViewInit(): void;
    /**
     * @hidden
     */
    ngOnDestroy(): void;
    /**
     * @hidden
     */
    dispatchAction(e: ExecuteActionEvent): void;
    /**
     * @hidden
     */
    textFor(key: string): string;
    /**
     * @hidden
     */
    scrollToPinnedMessage(event?: MouseEvent): void;
    /**
     * @hidden
     */
    onNearTop(): void;
    /**
     * @hidden
     */
    onNearBottom(): void;
    /**
     * @hidden
     */
    onScrollToBottomClick(): void;
    /**
     * @hidden
     */
    handleReferencedMessageClick(messageId: string | number, type: 'pinned' | 'reply'): void;
    /**
     * @hidden
     */
    onContextMenuAction(action: MessageAction): void;
    /**
     * @hidden
     */
    handleMenuClose(event: ContextMenuPopupEvent): void;
    /**
     * @hidden
     */
    onActionButtonClick(event: MouseEvent): void;
    /**
     * @hidden
     */
    onMessageListResize(): void;
    /**
     * Schedules the new-message scroll adjustment on zone.onStable so it runs
     * after Angular renders the new DOM but before the browser paints,
     * preventing a visible intermediate frame.
     */
    private scheduleNewMessageScroll;
    private detectNewMessageScrollAction;
    private getLastNewMessageElement;
    private findLastPinnedMessage;
    private initEndlessScroll;
    private handleMessagesChange;
    private handleRemoteMessagesChange;
    private handleRemoteReferencedMessageClick;
    private handlePendingRemoteScroll;
    private updateChatServiceProperties;
    private validateRemoteInputs;
    private mergeWithDefaultActions;
    static ɵfac: i0.ɵɵFactoryDeclaration<ChatComponent, never>;
    static ɵcmp: i0.ɵɵComponentDeclaration<ChatComponent, "kendo-chat", never, { "messages": { "alias": "messages"; "required": false; }; "authorId": { "alias": "authorId"; "required": false; }; "messageBoxType": { "alias": "messageBoxType"; "required": false; }; "height": { "alias": "height"; "required": false; }; "width": { "alias": "width"; "required": false; }; "placeholder": { "alias": "placeholder"; "required": false; }; "messageWidthMode": { "alias": "messageWidthMode"; "required": false; }; "timestampVisibility": { "alias": "timestampVisibility"; "required": false; }; "showUsername": { "alias": "showUsername"; "required": false; }; "showAvatar": { "alias": "showAvatar"; "required": false; }; "allowMessageCollapse": { "alias": "allowMessageCollapse"; "required": false; }; "speechToTextButton": { "alias": "speechToTextButton"; "required": false; }; "fileSelectButton": { "alias": "fileSelectButton"; "required": false; }; "messageBoxSettings": { "alias": "messageBoxSettings"; "required": false; }; "messageToolbarActions": { "alias": "messageToolbarActions"; "required": false; }; "inputValue": { "alias": "inputValue"; "required": false; }; "authorMessageSettings": { "alias": "authorMessageSettings"; "required": false; }; "receiverMessageSettings": { "alias": "receiverMessageSettings"; "required": false; }; "messageContextMenuActions": { "alias": "messageContextMenuActions"; "required": false; }; "fileActions": { "alias": "fileActions"; "required": false; }; "messageFilesLayout": { "alias": "messageFilesLayout"; "required": false; }; "suggestionsLayout": { "alias": "suggestionsLayout"; "required": false; }; "quickActionsLayout": { "alias": "quickActionsLayout"; "required": false; }; "suggestions": { "alias": "suggestions"; "required": false; }; "sendButton": { "alias": "sendButton"; "required": false; }; "sendButtonSettings": { "alias": "sendButtonSettings"; "required": false; }; "scrollMode": { "alias": "scrollMode"; "required": false; }; "pageSize": { "alias": "pageSize"; "required": false; }; "autoScrollThreshold": { "alias": "autoScrollThreshold"; "required": false; }; "total": { "alias": "total"; "required": false; }; "startIndex": { "alias": "startIndex"; "required": false; }; "endIndex": { "alias": "endIndex"; "required": false; }; "pinnedMessages": { "alias": "pinnedMessages"; "required": false; }; "repliedToMessages": { "alias": "repliedToMessages"; "required": false; }; "modelFields": { "alias": "modelFields"; "required": false; }; "scrollToBottomButton": { "alias": "scrollToBottomButton"; "required": false; }; "loading": { "alias": "loading"; "required": false; }; }, { "sendMessage": "sendMessage"; "resendMessage": "resendMessage"; "toolbarActionClick": "toolbarActionClick"; "contextMenuActionClick": "contextMenuActionClick"; "fileActionClick": "fileActionClick"; "download": "download"; "executeAction": "executeAction"; "suggestionExecute": "suggestionExecute"; "fileSelect": "fileSelect"; "fileRemove": "fileRemove"; "unpin": "unpin"; "inputValueChange": "inputValueChange"; "loadMore": "loadMore"; "referencedMessageClick": "referencedMessageClick"; }, ["attachmentTemplate", "chatHeaderTemplate", "chatNoDataTemplate", "authorMessageContentTemplate", "receiverMessageContentTemplate", "messageContentTemplate", "authorMessageTemplate", "receiverMessageTemplate", "messageTemplate", "timestampTemplate", "suggestionTemplate", "statusTemplate", "messageBoxTemplate", "messageBoxStartAffixTemplate", "messageBoxEndAffixTemplate", "messageBoxTopAffixTemplate", "userStatusTemplate"], never, true, never>;
}