package com.shawn.util;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

public class DateUtils
{
  public static final String PATTERN_MMdd = "MMdd";
  public static final String PATTERN_yyyyMMdd = "yyyyMMdd";
  public static final String PATTERN_yyyyMMddHHmmss = "yyyyMMddHHmmss";
  public static final String PATTERN_yyyyMMddHHmmssSSS = "yyyyMMddHHmmssSSS";
  public static final String PATTERN_yyyy_MM_dd = "yyyy-MM-dd";
  public static final String PATTERN_yyyy_M_d = "yyyy-M-d";
  public static final String PATTERN_yyyy_MM_dd_HH_mm_ss = "yyyy-MM-dd HH:mm:ss";
  public static final String PATTERN_yyyy_MM_dd_HH_mm = "yyyy-MM-dd HH:mm";
  public static final String PATTERN_HH_mm_ss = "HH:mm:ss";
  public static final String PATTERN_HHmmss = "HHmmss";
  public static final Map<String, String> mapChDate = new HashMap<String, String>();

  public static Date getNextday(Date now)
  {
    Calendar calendar = Calendar.getInstance();
    calendar.setTime(now);
    calendar.add(5, 1);
    return calendar.getTime();
  }
  
  public static Date getPreday(Date now)
  {
    Calendar calendar = Calendar.getInstance();
    calendar.setTime(now);
    calendar.add(5, -1);
    return calendar.getTime();
  }

  public static String formatDate_ch(Date date)
  {
    if(date==null){
   	 throw new IllegalArgumentException("需要转换的对象为空");
    }
    String str = formatDate(date, "MMdd");
    str = (String)mapChDate.get(str.substring(0, 2)) + str.substring(2);
    return str;
  }

  public static String formatDate(Date date, String pattern)
  {
    if(date==null){
        return "";
    }
    SimpleDateFormat sdf = null;
    if (pattern == null)
      sdf = new SimpleDateFormat();
    else {
      sdf = new SimpleDateFormat(pattern);
    }
    return sdf.format(date);
  }

  public static String formatDate(Date date) {
    SimpleDateFormat sdf = new SimpleDateFormat();
    return sdf.format(date);
  }

  public static Date parseDate(String source, String pattern) throws ParseException
  {
    SimpleDateFormat sdf = null;
    if (pattern == null)
      sdf = new SimpleDateFormat();
    else {
      sdf = new SimpleDateFormat(pattern);
    }
    return sdf.parse(source);
  }

  public static Date parseDate(String source) throws ParseException {
    SimpleDateFormat sdf = new SimpleDateFormat();
    return sdf.parse(source);
  }

  public static Date parseDate(String source, Date defaultDate) {
    try {
      SimpleDateFormat sdf = new SimpleDateFormat();
      return sdf.parse(source);
    }
    catch (ParseException e)
    {
    }
    return defaultDate;
  }

  public static Date parseDate(String source, String pattern, Date defaultDate) {
    try {
      SimpleDateFormat sdf = null;
      if (pattern == null)
        sdf = new SimpleDateFormat();
      else {
        sdf = new SimpleDateFormat(pattern);
      }
      return sdf.parse(source);
    }
    catch (ParseException e) {
    }
    return defaultDate;
  }

  public static boolean tryParse(String source) throws ParseException {
    try {
      Integer.parseInt(source);
      return true;
    } catch (NumberFormatException e) {
    }
    return false;
  }

  public static Date changeDate(Date date, TimeType timeType, int amount)
  {
    if ((date == null) || (timeType == null) || (amount == 0)) {
      return date;
    }
    Calendar c = Calendar.getInstance();
    c.setTime(date);
    c.add(timeType.getValue(), amount);
    return c.getTime();
  }

  public static boolean isSameDay(Date date1, Date date2)
  {
    if ((date1 == null) || (date2 == null)) {
      throw new IllegalArgumentException("The date must not be null");
    }
    Calendar cal1 = Calendar.getInstance();
    cal1.setTime(date1);
    Calendar cal2 = Calendar.getInstance();
    cal2.setTime(date2);
    return isSameDay(cal1, cal2);
  }

  public static boolean isSameDay(Calendar cal1, Calendar cal2)
  {
    if ((cal1 == null) || (cal2 == null)) {
      throw new IllegalArgumentException("The date must not be null");
    }
    return (cal1.get(0) == cal2.get(0)) && (cal1.get(1) == cal2.get(1)) && (cal1.get(6) == cal2.get(6));
  }

  /** @deprecated */
  public static Date add(Date date, int calendarField, int amount)
  {
    if (date == null) {
      throw new IllegalArgumentException("The date must not be null");
    }
    Calendar c = Calendar.getInstance();
    c.setTime(date);
    c.add(calendarField, amount);
    return c.getTime();
  }

  public static Date addYears(Date date, int amount)
  {
    return add(date, 1, amount);
  }

  public static Date addMonths(Date date, int amount)
  {
    return add(date, 2, amount);
  }

  public static Date addWeeks(Date date, int amount)
  {
    return add(date, 3, amount);
  }

  public static Date addDays(Date date, int amount)
  {
    return add(date, 5, amount);
  }

  public static Date addHours(Date date, int amount)
  {
    return add(date, 11, amount);
  }

  public static Date addMinutes(Date date, int amount)
  {
    return add(date, 12, amount);
  }

  public static Date addSeconds(Date date, int amount)
  {
    return add(date, 13, amount);
  }

  public static Date addMilliseconds(Date date, int amount)
  {
    return add(date, 14, amount);
  }

  static
  {
    mapChDate.put("01", "一月");
    mapChDate.put("02", "二月");
    mapChDate.put("03", "三月");
    mapChDate.put("04", "四月");
    mapChDate.put("05", "五月");
    mapChDate.put("06", "六月");
    mapChDate.put("07", "七月");
    mapChDate.put("08", "八月");
    mapChDate.put("09", "九月");
    mapChDate.put("10", "十月");
    mapChDate.put("11", "十一月");
    mapChDate.put("12", "十二月");
  }

  public static enum TimeType
  {
    SECOND(13), MINUTE(12), HOUR(10), DAY(5), 
    WEEK(4), MONTH(2), 
    YEAR(1);

    private int value;

    private TimeType(int value) {
      this.value = value;
    }

    public int getValue() {
      return this.value;
    }
  }
  /**
   * 
   * 毛龙飞
   * @Description 获取日期的后几天
   * @param d
   * @param day
   * @return
   */
  public static Date getDateAfter(Date d, int day) {  
      Calendar now = Calendar.getInstance();  
      now.setTime(d);  
      now.set(Calendar.DATE, now.get(Calendar.DATE) + day);  
      return now.getTime();  
  }
}