/**
 * 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 com.alibaba.jstorm.ui.controller;

import backtype.storm.generated.*;
import backtype.storm.utils.NimbusClient;
import com.alibaba.jstorm.ui.model.UIStreamMetric;
import com.alibaba.jstorm.ui.model.TaskEntity;
import com.alibaba.jstorm.ui.model.UITaskMetric;
import com.alibaba.jstorm.ui.utils.NimbusClientManager;
import com.alibaba.jstorm.ui.utils.UIMetricUtils;
import com.alibaba.jstorm.ui.utils.UIUtils;
import com.alibaba.jstorm.utils.JStormUtils;
import org.apache.commons.lang.StringEscapeUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * @author Jark (wuchong.wc@alibaba-inc.com)
 */
@Controller
public class TaskController {
    private static final Logger LOG = LoggerFactory.getLogger(TaskController.class);

    @RequestMapping(value = "/task", method = RequestMethod.GET)
    public String show(@RequestParam(value = "cluster", required = true) String clusterName,
                       @RequestParam(value = "topology", required = true) String topology_id,
                       @RequestParam(value = "component", required = true) String component,
                       @RequestParam(value = "id", required = true) String task_id,
                       @RequestParam(value = "win", required = false) String win,
                       ModelMap model) {
        clusterName = StringEscapeUtils.escapeHtml(clusterName);
        topology_id = StringEscapeUtils.escapeHtml(topology_id);
        long start = System.currentTimeMillis();
        int window = UIUtils.parseWindow(win);
        UIUtils.addWindowAttribute(model, window);
        NimbusClient client = null;
        try {
            client = NimbusClientManager.getNimbusClient(clusterName);

            //get task entity
            TopologyInfo topologyInfo = client.getClient().getTopologyInfo(topology_id);
            int id = JStormUtils.parseInt(task_id);
            TaskEntity task = UIUtils.getTaskEntity(topologyInfo.get_tasks(), id);
            task.setComponent(component);
            model.addAttribute("task", task);

            //get task metric
            List<MetricInfo> taskStreamMetrics = client.getClient().getTaskAndStreamMetrics(topology_id, id);
//            System.out.println("taskMetrics size:"+getSize(taskMetrics));
            UITaskMetric taskMetric = UIMetricUtils.getTaskMetric(taskStreamMetrics, component, id, window);
            model.addAttribute("taskMetric", taskMetric);
            model.addAttribute("taskHead", UIMetricUtils.sortHead(taskMetric, UITaskMetric.HEAD));

            //get stream metric
            List<UIStreamMetric> streamData = UIMetricUtils.getStreamMetrics(taskStreamMetrics, component, id, window);
            model.addAttribute("streamData", streamData);
            model.addAttribute("streamHead", UIMetricUtils.sortHead(streamData, UIStreamMetric.HEAD));

        } catch (NotAliveException nae) {
            model.addAttribute("flush", String.format("The topology: %s is dead", topology_id));
        } catch (Exception e) {
            NimbusClientManager.removeClient(clusterName);
            LOG.error(e.getMessage(), e);
            UIUtils.addErrorAttribute(model, e);
        }
        model.addAttribute("clusterName", clusterName);
        model.addAttribute("topologyId", topology_id);
        model.addAttribute("compName", component);
        model.addAttribute("page", "task");
        UIUtils.addTitleAttribute(model, "Task Summary");

        LOG.info("task page show cost:{}ms", System.currentTimeMillis() - start);
        return "task";
    }

}