/*-
 * ============LICENSE_START=======================================================
 * SDC
 * ================================================================================
 * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
 * ================================================================================
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * ============LICENSE_END=========================================================
 */
/// <reference path="../references"/>
module Sdc.Utils.Functions {

    export class QueueUtils {

        private executionQueue : any;

        constructor(private $q:ng.IQService){
            this.executionQueue = this.getDummyPromise();
        }


        private getDummyPromise = (): ng.IPromise<boolean> => {
            let deferred : ng.IDeferred<boolean>= this.$q.defer();
            deferred.resolve(true);
            return deferred.promise;
        };


        private addMethodToQueue = (runMe:Function) : void => {
            this.executionQueue = this.executionQueue.then(runMe, runMe);
        };

        addNonBlockingUIAction = (update:Function , releaseUIcallBack:Function) : void => {
            releaseUIcallBack();
            this.addMethodToQueue(update);
        };

        // The Method call is responsible for releasing the UI
        addBlockingUIAction = ( blockingServerRequest : Function ):void => {
            this.addMethodToQueue(blockingServerRequest);
        };

        addBlockingUIActionWithReleaseCallback = ( blockingServerRequest : Function, releaseUIcallBack:Function):void=>{
            this.addMethodToQueue(blockingServerRequest);
            this.addMethodToQueue(releaseUIcallBack);
        };
    }
}