package com.fr.plugin.ztzzSSO.utils;

import java.sql.Timestamp;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;

public class DateUtilSelf {
	
	/**
	    * 日期转换为日期字符串
	 * @param date
	 * @param formatStr
	 * @return String
	 */
	public static String DateToString(Date date,String formatStr) {
		SimpleDateFormat sdf = new SimpleDateFormat(formatStr);
		String dateStr = sdf.format(date).toString();
		
		return dateStr;
	}
	
	/**
	    * 日期字符串转换日期
	 * @param dateStr
	 * @param formatStr
	 * @return Date
	 */
	public static Date strToDate(String dateStr,String formatStr){
		SimpleDateFormat sdf = new SimpleDateFormat(formatStr);
		Date date = null;
		
		try {
			date = sdf.parse(dateStr);
		}
		catch(Exception e) {
		}
		
		return date;
	}
	
	/**
	 * Date转Timestamp
	 * @param date
	 * @return
	 */
	public static Timestamp dateToTimestamp(Date date) {	
		Date transDate = DateUtilSelf.strToDate(DateUtilSelf.DateToString(date, "yyyy-MM-dd hh:mm:ss"),"yyyy-MM-dd hh:mm:ss");
		
		Timestamp timestamp = new Timestamp(transDate.getTime());
		return timestamp;
	} 
	
	/**
	 * Date字符串转Timestamp
	 * @param dateStr
	 * @param format
	 * @return
	 */
	public static Timestamp strToTimestamp(String dateStr,String format) {
		Date date = strToDate(dateStr,format);
		Timestamp timestamp = new Timestamp(date.getTime());
		return timestamp;
	} 
	
	/**
	    * 获取两个日期字符串之间的天数
	 * @param startDateStr
	 * @param endDateStr
	 * @param formatStr
	 * @return
	 */
	public static int getDays(String startDateStr,String endDateStr,String formatStr) {
		  
		Date startDate = strToDate(startDateStr,formatStr);
		Date endDate = strToDate(endDateStr,formatStr);
	
		long startTime = startDate.getTime();
		long endTime = endDate.getTime();
		
		int days = (int) ((endTime - startTime)/(60*60*24*1000));
		
		return days;
	}
	
	/**
	 * 获取给定时间之前之后的时间
	 * @param type
	 * @param dateStr
	 * @param count
	 * @param formatStr
	 * @return
	 */
	public static String getAfterDateStr(int type,String dateStr,int count,String formatStr) {
		Date startDate = strToDate(dateStr,formatStr);
		
		Calendar calendar = Calendar.getInstance(); 
		calendar.setTime(startDate);

		calendar.add(type, count); 
		 
		String endDateStr = DateToString(calendar.getTime(),formatStr);
		
		return endDateStr;
	}
	
	/**
	 * 获取给定时间之前之后的时间
	 * @param type
	 * @param date
	 * @param count
	 * @param formatStr
	 * @return
	 */
	public static String getAfterDateStr(int type,Date date,int count,String formatStr) {

		Calendar calendar = Calendar.getInstance(); 
		calendar.setTime(date);
		
		calendar.add(type, count); 
 
		String endDateStr = DateToString(calendar.getTime(),formatStr);
		
		return endDateStr;
	}
	
	/**
	 * 获取给定时间之前之后的时间
	 * @param type
	 * @param date
	 * @param count
	 * @return
	 */
	public static Date getAfterDateStr(int type,Date date,int count) {
		Calendar dateResult = Calendar.getInstance();
		dateResult.setTime(date);
		dateResult.add(type, count);
		return dateResult.getTime();
	}
	
	/**
	 * 时间戳转日期
	 * @param timestamp
	 * @return
	 */
	public static Date timestampToDate(Timestamp timestamp) {
		Date date = new Date(timestamp.getTime());
		
		return date;
	}
	
	/**
	 * 时间戳转时间字符串
	 * @param timestamp
	 * @param format  日期格式
	 * @return
	 */
	public static String timestampToStr(Timestamp timestamp,String format) {
		Date date = timestampToDate(timestamp);
		
		String timeStr = DateToString(date, format);
		
		return timeStr;
	}
	
	/**
	 * 获取所给日期length天内每一天的日期
	 * @param date 所给日期（yyyy-MM-dd）
	 * @param length 长度
	 * @return
	 */
	public static List<String> getDateList(String date,int length){
		List<String> dateList = new ArrayList<String>();
		String format = "yyyy-MM-dd";
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
		//获取length天后的日期

		String targetDate = getAfterDateStr(Calendar.DATE,date,length,format);
		
		Date start = null;
		Date end = null;
		
		if(length >= 0) {
			start = strToDate(date,format);
			end = strToDate(targetDate,format);
		}else {
			start = strToDate(targetDate,format);
			end = strToDate(date,format);
		}
		
		Calendar calBegin = Calendar.getInstance();
        calBegin.setTime(start);
        Calendar calEnd = Calendar.getInstance();
        calEnd.setTime(end);

        while (end.after(calBegin.getTime())) {
             calBegin.add(Calendar.DATE, 1);
             String dayStr = sdf.format(calBegin.getTime());
             dateList.add(dayStr);
        }

		return dateList;
	}
	
	/**
	 * 比较startDate是否在endDate之前
	 * @param startDate
	 * @param endDate
	 * @param format
	 * @return 0 两个日期相等  <0 开始日期在结束日期之前  >0 开始日期在结束日期之后
	 */
	public static int comparisonDate(String startDate,String endDate,String format) {
		Date start = strToDate(startDate,format);
		Date end = strToDate(endDate,format);

		return start.compareTo(end);
	}

	//获取当前日期年、月、日、时、分、秒
	public static int getCount(int type){
		Calendar calendar = Calendar.getInstance();

		return calendar.get(type);
	}
}