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package com.github.ibole.infrastructure.common.utils;

import java.text.ParseException;
import java.util.Date;

import org.apache.commons.lang3.time.DateFormatUtils;

/**
 * 日期工具类, 继承org.apache.commons.lang.time.DateUtils类
 * 
 */
public class DateUtils extends org.apache.commons.lang3.time.DateUtils {

  private static String[] parsePatterns = {"yyyy-MM-dd", "yyyy-MM-dd HH:mm:ss", "yyyy-MM-dd HH:mm",
      "yyyy-MM", "yyyy/MM/dd", "yyyy/MM/dd HH:mm:ss", "yyyy/MM/dd HH:mm", "yyyy/MM", "yyyy.MM.dd",
      "yyyy.MM.dd HH:mm:ss", "yyyy.MM.dd HH:mm", "yyyy.MM"};

  /**
   * 得到当前日期字符串 格式(yyyy-MM-dd)
   * @return date String
   */
  public static String getDate() {
    return getDate("yyyy-MM-dd");
  }

  /**
   * 得到当前日期字符串 格式(yyyy-MM-dd) pattern可以为:"yyyy-MM-dd" "HH:mm:ss" "E"
   * @param pattern String
   * @return date String
   */
  public static String getDate(String pattern) {
    return DateFormatUtils.format(new Date(), pattern);
  }

  /**
   * 得到日期字符串 默认格式(yyyy-MM-dd) pattern可以为:"yyyy-MM-dd" "HH:mm:ss" "E"
   * @param pattern String
   * @param date Date
   * @return date String
   */
  public static String formatDate(Date date, Object... pattern) {
    String formatDate = null;
    if (pattern != null && pattern.length > 0) {
      formatDate = DateFormatUtils.format(date, pattern[0].toString());
    } else {
      formatDate = DateFormatUtils.format(date, "yyyy-MM-dd");
    }
    return formatDate;
  }

  /**
   * 得到日期时间字符串,转换格式(yyyy-MM-dd HH:mm:ss)
   * @param date Date
   * @return date String
   */
  public static String formatDateTime(Date date) {
    return formatDate(date, "yyyy-MM-dd HH:mm:ss");
  }

  /**
   * 得到当前时间字符串 格式(HH:mm:ss)
   * @return time String
   */
  public static String getTime() {
    return formatDate(new Date(), "HH:mm:ss");
  }

  /**
   * 得到当前日期和时间字符串 格式(yyyy-MM-dd HH:mm:ss)
   * @return datetime String
   */
  public static String getDateTime() {
    return formatDate(new Date(), "yyyy-MM-dd HH:mm:ss");
  }

  /**
   * 得到当前年份字符串 格式(yyyy)
   * @return year String
   */
  public static String getYear() {
    return formatDate(new Date(), "yyyy");
  }

  /**
   * 得到当前月份字符串 格式(MM)
   * @return month String
   */
  public static String getMonth() {
    return formatDate(new Date(), "MM");
  }

  /**
   * 得到当天字符串 格式(dd)
   * @return day String
   */
  public static String getDay() {
    return formatDate(new Date(), "dd");
  }

  /**
   * 得到当前星期字符串 格式(E)星期几
   * @return week String
   */
  public static String getWeek() {
    return formatDate(new Date(), "E");
  }

  /**
   * 日期型字符串转化为日期 格式 { "yyyy-MM-dd", "yyyy-MM-dd HH:mm:ss", "yyyy-MM-dd HH:mm", "yyyy/MM/dd",
   * "yyyy/MM/dd HH:mm:ss", "yyyy/MM/dd HH:mm", "yyyy.MM.dd", "yyyy.MM.dd HH:mm:ss",
   * "yyyy.MM.dd HH:mm" }
   *  @param str Object
   *  @return date Date
   */
  public static Date parseDate(Object str) {
    if (str == null) {
      return null;
    }
    try {
      return parseDate(str.toString(), parsePatterns);
    } catch (ParseException e) {
      return null;
    }
  }

  /**
   * 获取过去的天数
   * 
   * @param date Date
   * @return time long
   */
  public static long pastDays(Date date) {
    long t = new Date().getTime() - date.getTime();
    return t / (24 * 60 * 60 * 1000);
  }

  /**
   * 获取过去的小时
   * 
   * @param date Date
   * @return hour Long
   */
  public static long pastHour(Date date) {
    long t = new Date().getTime() - date.getTime();
    return t / (60 * 60 * 1000);
  }

  /**
   * 获取过去的分钟
   * 
   * @param date Date
   * @return minutes Long
   */
  public static long pastMinutes(Date date) {
    long t = new Date().getTime() - date.getTime();
    return t / (60 * 1000);
  }

  /**
   * 转换为时间(天,时:分:秒.毫秒)
   * 
   * @param timeMillis Long
   * @return datetime String
   */
  public static String formatDateTime(long timeMillis) {
    long day = timeMillis / (24 * 60 * 60 * 1000);
    long hour = (timeMillis / (60 * 60 * 1000) - day * 24);
    long min = ((timeMillis / (60 * 1000)) - day * 24 * 60 - hour * 60);
    long s = (timeMillis / 1000 - day * 24 * 60 * 60 - hour * 60 * 60 - min * 60);
    long sss =
        (timeMillis - day * 24 * 60 * 60 * 1000 - hour * 60 * 60 * 1000 - min * 60 * 1000 - s * 1000);
    return (day > 0 ? day + "," : "") + hour + ":" + min + ":" + s + "." + sss;
  }

  /**
   * 获取两个日期之间的天数
   * 
   * @param before Date
   * @param after Date
   * @return distance of two date Double
   */
  public static double getDistanceOfTwoDate(Date before, Date after) {
    long beforeTime = before.getTime();
    long afterTime = after.getTime();
    return (afterTime - beforeTime) / (1000 * 60 * 60 * 24);
  }

  /**
   * @param args args
   * @throws ParseException Exception
   */
  public static void main(String[] args) throws ParseException {
    // System.out.println(formatDate(parseDate("2010/3/6")));
    // System.out.println(getDate("yyyy年MM月dd日 E"));
    // long time = new Date().getTime()-parseDate("2012-11-19").getTime();
    // System.out.println(time/(24*60*60*1000));
  }
}




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