/**
* 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.
*/

package org.apache.hadoop.yarn.server.nodemanager.webapp;

import static org.apache.hadoop.yarn.webapp.view.JQueryUI.DATATABLES;
import static org.apache.hadoop.yarn.webapp.view.JQueryUI.DATATABLES_ID;
import static org.apache.hadoop.yarn.webapp.view.JQueryUI.initID;
import static org.apache.hadoop.yarn.webapp.view.JQueryUI.tableInit;

import java.util.Map.Entry;

import org.apache.hadoop.yarn.api.records.ApplicationId;
import org.apache.hadoop.yarn.server.nodemanager.Context;
import org.apache.hadoop.yarn.server.nodemanager.containermanager.application.Application;
import org.apache.hadoop.yarn.server.nodemanager.webapp.dao.AppInfo;
import org.apache.hadoop.yarn.webapp.SubView;
import org.apache.hadoop.yarn.webapp.YarnWebParams;
import org.apache.hadoop.yarn.webapp.hamlet.Hamlet;
import org.apache.hadoop.yarn.webapp.hamlet.Hamlet.BODY;
import org.apache.hadoop.yarn.webapp.hamlet.Hamlet.TABLE;
import org.apache.hadoop.yarn.webapp.hamlet.Hamlet.TBODY;
import org.apache.hadoop.yarn.webapp.view.HtmlBlock;

import com.google.inject.Inject;

public class AllApplicationsPage extends NMView {

  @Override protected void preHead(Page.HTML<_> html) {
    commonPreHead(html);
    setTitle("Applications running on this node");
    set(DATATABLES_ID, "applications");
    set(initID(DATATABLES, "applications"), appsTableInit());
    setTableStyles(html, "applications");
  }

  private String appsTableInit() {
    return tableInit().
        // Sort by id upon page load
        append(", aaSorting: [[0, 'asc']]").
        // applicationid, applicationstate
        append(", aoColumns:[null, null]} ").toString();
  }

  @Override
  protected Class<? extends SubView> content() {
    return AllApplicationsBlock.class;
  }

  public static class AllApplicationsBlock extends HtmlBlock implements
      YarnWebParams {

    private final Context nmContext;

    @Inject
    public AllApplicationsBlock(Context nmContext) {
      this.nmContext = nmContext;
    }

    @Override
    protected void render(Block html) {

      TBODY<TABLE<BODY<Hamlet>>> tableBody =
        html
          .body()
            .table("#applications")
              .thead()
                .tr()
                  .td()._("ApplicationId")._()
                  .td()._("ApplicationState")._()
                ._()
               ._()
               .tbody();
      for (Entry<ApplicationId, Application> entry : this.nmContext
          .getApplications().entrySet()) {
        AppInfo info = new AppInfo(entry.getValue());
        tableBody
          .tr()
            .td().a(url("application", info.getId()), info.getId())._()
            .td()._(info.getState())
            ._()
          ._();
      }
      tableBody._()._()._();
    }
  }
}
