import { ChatEventType } from "../enums";
import { ChatEventHandler, SendMessageServiceParams, SendTypingServiceParams } from "../Types";
import { ChatEvent } from "../events";
/**
 * Why it is prefixed by I?
 * Because purpose of this interface is to Implement it wih other libraries :)
 * So, why other types here is not prefixed with I?
 * Because the other interfaces are only for declaring complex types
 */
export interface IChatService {
    /**
     * Register callback function
     * Chat provider uses this function for registering callbacks.
     * E.g. When service receives a message from the wire (mostly websocket) it should call a registered "onMessage" callback,
     * which will add the message to state and perform re-render.
     *
     * ChatProvider always registers one callback for each event, so you can keep eventHandler for specified event type
     * directly in property. However keeping eventHandler in collection is a better practice.
     * See also ExampleChatService
     *
     * @param evtType
     * @param evtHandler
     */
    on: <T extends ChatEventType, H extends ChatEvent<T>>(evtType: T, evtHandler: ChatEventHandler<T, H>) => void;
    /**
     * Remove registered callback
     * @param evtType
     * @param evtHandler
     */
    off: <T extends ChatEventType, H extends ChatEvent<T>>(evtType: T, evtHandler: ChatEventHandler<T, H>) => void;
    /**
     * Send chat message
     * Implement send logic for sending chat messages here.
     * @param params
     */
    sendMessage: (params: SendMessageServiceParams) => void;
    /**
     * Send typing indicator.
     * Implement sending typing indicator here.
     * @param conversationId
     * @param userId
     * @param content
     */
    sendTyping: (params: SendTypingServiceParams) => void;
}