/*
 * 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.chukwa.hicc;

import java.util.Calendar;
import java.util.TimeZone;
import java.text.SimpleDateFormat;
import java.util.HashMap;

public class OfflineTimeHandler {
  private TimeZone tz = null;
  private long start = 0;
  private long end = 0;
  private String startDate = null;
  private String startHour = null;
  private String startMin = null;
  private String endDate = null;
  private String endHour = null;
  private String endMin = null;
  private String startS = null;
  private String endS = null;
  
  public OfflineTimeHandler(HashMap<String, String> map) {
    this.tz = TimeZone.getTimeZone("UTC");
    init(map);
  }

  public OfflineTimeHandler(HashMap<String, String> map, String tz) {
    if (tz != null) {
      this.tz = TimeZone.getTimeZone(tz);
    } else {
      this.tz = TimeZone.getTimeZone("UTC");
    }
    init(map);
  }

  public void init(HashMap<String, String> map) {
    Calendar now = Calendar.getInstance();
    if (map == null || 
        (map.get("time_type") == null && map.get("period") == null)) {
      end = now.getTimeInMillis();
      start = end - 60 * 60 * 1000;
    } else if (map.get("period") != null
        && !map.get("period").equals("")) {
      String period = map.get("period");
      this.start = now.getTimeInMillis();
      this.end = now.getTimeInMillis();
      if (period.equals("last1hr")) {
        start = end - (60 * 60 * 1000);
      } else if (period.equals("last2hr")) {
        start = end - (2 * 60 * 60 * 1000);
      } else if (period.equals("last3hr")) {
        start = end - (3 * 60 * 60 * 1000);
      } else if (period.equals("last6hr")) {
        start = end - (6 * 60 * 60 * 1000);
      } else if (period.equals("last12hr")) {
        start = end - (12 * 60 * 60 * 1000);
      } else if (period.equals("last24hr")) {
        start = end - (24 * 60 * 60 * 1000);
      } else if (period.equals("last7d")) {
        start = end - (7 * 24 * 60 * 60 * 1000);
      } else if (period.equals("last30d")) {
        start = end - (30 * 24 * 60 * 60 * 1000);
      }
    } else if (map.get("start") != null
        && map.get("end") != null) {
      start = Long.parseLong(map.get("start"));
      end = Long.parseLong(map.get("end"));
    } else if (map.get("time_type").equals("range")) {
      start = Long.parseLong(map.get("start"));
      end = Long.parseLong(map.get("end"));
    } else if (map.get("time_type").equals("last")
        && map.get("period") != null) {
      String period = map.get("period");
      this.start = now.getTimeInMillis();
      this.end = now.getTimeInMillis();
      if (period.equals("last1hr")) {
        start = end - (60 * 60 * 1000);
      } else if (period.equals("last2hr")) {
        start = end - (2 * 60 * 60 * 1000);
      } else if (period.equals("last3hr")) {
        start = end - (3 * 60 * 60 * 1000);
      } else if (period.equals("last6hr")) {
        start = end - (6 * 60 * 60 * 1000);
      } else if (period.equals("last12hr")) {
        start = end - (12 * 60 * 60 * 1000);
      } else if (period.equals("last24hr")) {
        start = end - (24 * 60 * 60 * 1000);
      } else if (period.equals("last7d")) {
        start = end - (7 * 24 * 60 * 60 * 1000);
      } else if (period.equals("last30d")) {
        start = end - (30L * 24 * 60 * 60 * 1000);
      }
    }
    SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm");
    SimpleDateFormat formatDate = new SimpleDateFormat("yyyy-MM-dd");
    SimpleDateFormat formatHour = new SimpleDateFormat("HH");
    SimpleDateFormat formatMin = new SimpleDateFormat("mm");

    formatter.setTimeZone(this.tz);
    formatDate.setTimeZone(this.tz);
    formatHour.setTimeZone(this.tz);
    formatMin.setTimeZone(this.tz);

    startS = formatter.format(start);
    this.startDate = formatDate.format(start);
    this.startHour = formatHour.format(start);
    this.startMin = formatMin.format(start);
    endS = formatter.format(end);
    this.endDate = formatDate.format(end);
    this.endHour = formatHour.format(end);
    this.endMin = formatMin.format(end);
  }

  public String getStartDate(String format) {
    SimpleDateFormat formatter = new SimpleDateFormat(format);
    formatter.setTimeZone(this.tz);
    return formatter.format(this.start);
  }

  public String getStartDate() {
    return this.startDate;
  }

  public String getStartHour() {
    return this.startHour;
  }

  public String getStartMinute() {
    return this.startMin;
  }

  public String getStartTimeText() {
    return this.startS;
  }

  public long getStartTime() {
    return start;
  }

  public String getEndDate(String format) {
    SimpleDateFormat formatter = new SimpleDateFormat(format);
    formatter.setTimeZone(this.tz);
    return formatter.format(this.end);
  }

  public String getEndDate() {
    return this.endDate;
  }

  public String getEndHour() {
    return this.endHour;
  }

  public String getEndMinute() {
    return this.endMin;
  }

  public String getEndTimeText() {
    return this.endS;
  }

  public long getEndTime() {
    return end;
  }

}