/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements.  See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/

import {Listener} from "./tobago-listener";
import {ReloadManager} from "./tobago-reload";
import {Overlay} from "./tobago-overlay";

enum JsfParameter {
  VIEW_STATE = "javax.faces.ViewState",
  CLIENT_WINDOW = "javax.faces.ClientWindow",
  VIEW_ROOT = "javax.faces.ViewRoot",
  VIEW_HEAD = "javax.faces.ViewHead",
  VIEW_BODY = "javax.faces.ViewBody",
  RESOURCE = "javax.faces.Resource"
}

export class Jsf {

  private static isId = function (id: string): boolean {
    switch (id) {
      case JsfParameter.VIEW_STATE:
      case JsfParameter.CLIENT_WINDOW:
      case JsfParameter.VIEW_ROOT:
      case JsfParameter.VIEW_HEAD:
      case JsfParameter.VIEW_BODY:
      case JsfParameter.RESOURCE:
        return false;
      default:
        return true;
    }
  };

  private static isBody = function (id): boolean {
    switch (id) {
      case JsfParameter.VIEW_ROOT:
      case JsfParameter.VIEW_BODY:
        return true;
      default:
        return false;
    }
  };

  static registerAjaxListener = function (): void {
    jsf.ajax.addOnEvent(function (event): void {
      console.timeEnd("[tobago-jsf] jsf-ajax");
      console.time("[tobago-jsf] jsf-ajax");
      console.debug("[tobago-jsf] JSF event status: '%s'", event.status);
      if (event.status === "success") {
        event.responseXML.querySelectorAll("update").forEach(function (update: Element): void {
          const result = /<!\[CDATA\[(.*)]]>/gm.exec(update.innerHTML);
          const id = update.id;
          if (result !== null && result.length === 2 && result[1].startsWith("{\"reload\"")) {
            // not modified on server, needs be reloaded after some time
            console.debug("[tobago-jsf] Found reload-JSON in response!");
            ReloadManager.instance.schedule(id, JSON.parse(result[1]).reload.frequency);
          } else {
            console.info("[tobago-jsf] Update after jsf.ajax success: %s", id);
            if (Jsf.isId(id)) {
              console.debug("[tobago-jsf] updating #" + id);
              Listener.executeAfterUpdate(document.getElementById(id));
            } else if (Jsf.isBody(id)) {
              console.debug("[tobago-jsf] updating body");
              // there should be only one element with this tag name
              Listener.executeAfterUpdate(document.querySelector("tobago-page") as HTMLElement);
            }
          }
        });
      } else if (event.status === "complete") {
        event.responseXML.querySelectorAll("update").forEach(function (update: Element): void {
          const id = update.id;
          if (Jsf.isId(id)) {
            console.debug("[tobago-jsf] Update after jsf.ajax complete: #" + id);
            Overlay.destroy(id);
          }
        });
      }
    });
  };
}