"use strict";

import {WebSocketsClientsAbstract} from "../Abstracts/WebSocketsClientsAbstract.ecma.js";
import {Common} from "../Utils/Common.ecma.js";
import {Check} from "../Utils/Checks.ecma.js";

/**
 * @typedef {import("../Application/AnP.ecma.js").AnP} AnP
 */

/**
 * @class WebSocketsClientsManager
 * @constructor
 * @param {!AnP} anp 
 * @param {!string} key
 * @param {!(Object.<string, any|null>|Array.<any|null>)} inputs
 * @returns {void}
 * @access private
 * @static
 */
export const WebSocketsClientsManager = (function(){

    /**
     * @callback continue_callback
     * @param {boolean} ok
     * @returns {void}
     */

    /**
     * @callback simple_callback
     * @returns {void}
     */

    /**
     * @callback web_socket_constructor_callback
     * @param {!AnP} anp
     * @param {!(Object.<string, any|null>|Array.<any|null>)} inputs
     * @returns {void}
     */

    /**
     * @constructs WebSocketsClientsManager
     * @param {!AnP} anp 
     * @param {!string} key
     * @param {!(Object.<string, any|null>|Array.<any|null>)} inputs
     * @returns {void}
     * @access private
     * @static
     */
    const WebSocketsClientsManager = function(anp, key, inputs){

        /** @type {WebSocketsClientsManager} */
        const self = this, 
              /** @type {Object.<string, WebSocketsClientsAbstract>} */
              clients = {};

        /**
         * @returns {void}
         * @access private
         */
        const constructor = () => {};
        
        /**
         * @param {?continue_callback} callback 
         * @returns {boolean}
         * @access public
         */
        this.update = (callback = null) => {
            Common.execute_array(["default_web_sockets_clients_files", "web_sockets_clients_files", "default_web_sockets_clients", "web_sockets_clients"], (key, next) => {
                self.add(anp.settings.get(key), true, next);
            }, callback, true);
        };

        /**
         * @param {?continue_callback} callback 
         * @returns {boolean}
         * @access public
         */
        this.reset = (callback = null) => {

            [settings, secrets].forEach(Common.clear_dictionary);

            self.update(callback);

        };

        /**
         * @param {?continue_callback} callback 
         * @returns {boolean}
         * @access public
         */
        this.start = (callback = null) => {

            /** @type {continue_callback} */
            const end = ok => Common.execute(callback, ok);

            if(started){
                end(false);
                return false;
            };
            started = true;

            self.update(() => end(true));

            return true;
        };

        /**
         * @param {?continue_callback} callback 
         * @returns {boolean}
         * @access public
         */
        this.close = (callback = null) => {

            /** @type {continue_callback} */
            const end = ok => Common.execute(callback, ok);

            if(!started){
                end(false);
                return false;
            };
            started = false;

            end(true);

            return true;
        };
        
        /**
         * @param {?any} inputs 
         * @param {!boolean} [overwrite = false] 
         * @param {?simple_callback} [callback = null] 
         * @return {void}
         * @access public
         */
        this.add = (inputs, overwrite = false, callback = null) => {
            anp.files.load_json(inputs, data => {
                for(let subinputs of data)
                    Object.entries(subinputs).filter(([key, _]) => (
                        overwrite || clients[key] === undefined
                    )).forEach(([key, value]) => {
                        try{

                            /** @type {string|web_socket_constructor_callback|WebSocketsClientsAbstract} */
                            const Type = Common.get_value("type", (
                                      Check.is_string(value) ? value = {url : value} : 
                                  value), "WebSocketsDriver"), 
                                  /** @type {web_socket_constructor_callback|null} */
                                  Model = Check.is_string(Type) ? anp.models.get(Type) : null, 
                                  /** @type {WebSocketsClientsAbstract} */
                                  web_socket = (
                                      Model ? new Model(anp, key, value) : 
                                      Check.is_function(Type) ? new Type(anp, key, value) :
                                      Type instanceof WebSocketsClientsAbstract ? Type : 
                                  null);

                            web_socket && (clients[key] = web_socket);

                        }catch(exception){
                            anp.exception(exception, "anp_web_sockets_clients_manager_add", {
                                key : key
                            });
                        };
                    });
                Common.execute(callback);
            }, true);
        };

        this.remove = key => {
            if(key in clients){
                clients[key].close();
                delete clients[key];
                return true;
            };
            return false;
        };

        this.send = (key, controller, action, data = null, code = 200) => {
            if(key in clients){
                clients[key].send(controller, action, data, code);
                return true;
            };
            return false;
        };

        this.on_open = (key, callback) => {
            if(key in clients){
                clients[key].on_open.add(callback);
                return true;
            };
            return false;
        };

        this.on_message = (key, callback) => {
            if(key in clients){
                clients[key].on_message.add(callback);
                return true;
            };
            return false;
        };

        this.on_error = (key, callback) => {
            if(key in clients){
                clients[key].on_error.add(callback);
                return true;
            };
            return false;
        };

        this.on_close = (key, callback) => {
            if(key in clients){
                clients[key].on_close.add(callback);
                return true;
            };
            return false;
        };

        constructor();

    };

    return WebSocketsClientsManager;
})();