package com.qxueyou.scc.base.util;

/**
 * 记录项目管理部分核心的数据库字典信息；基础操作Form
 *
 * @author 邓志永
 * @since JDK1.6
 * @history 2014-11-28 邓志永 新建
 */
import java.sql.Timestamp;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.Locale;

import org.apache.commons.lang3.StringUtils;

public class DateUtils {


    /**
     * 根据格式获得日期字符串
     *
     * @param sFormat
     * @return
     */
    public String getDateStr(String sFormat) {
        Calendar tCal = Calendar.getInstance();
        Timestamp ts = new Timestamp(tCal.getTime().getTime());
        java.util.Date date = new java.util.Date(ts.getTime());
        SimpleDateFormat formatter = new SimpleDateFormat(sFormat, Locale.CHINA);
        return formatter.format(date);
    }

    /**
     * 根据给定格式获取特定时间的格式化显示
     *
     * @param ts
     * @param sFormat
     * @return
     */
    public String getDateFormat(Timestamp ts, String sFormat) {
        Date date = new Date(ts.getTime());
        SimpleDateFormat formatter = new SimpleDateFormat(sFormat, Locale.CHINA);
        return formatter.format(date);
    }

    /**
     * 格式化日期
     *
     * @param ts
     * @return
     */
    public String getSDate(Timestamp ts) {
        Date date = new Date(ts.getTime());
        SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd", Locale.CHINA);
        return formatter.format(date);
    }

    /**
     * 将String类型的日期转换为时间
     *
     * @param dt
     * @return
     */
    public Timestamp getTs(String dt) {
        Date date = java.sql.Date.valueOf(dt);
        Calendar tCal = Calendar.getInstance();
        tCal.setTime(date);
        return new Timestamp(tCal.getTime().getTime());
    }

    /**
     * 建议获得短日期的处理方式 例如: getShortDate(2004-10-10 10:10:10.123) = 2004-10-10
     *
     * @param dt
     * @return
     */
    public String getShortDate(String dt) {
        try {
            return dt.substring(0, dt.indexOf(' '));
        } catch (Exception e) {
            return dt;
        }
    }

    /**
     * 取得当前日期时间
     *
     * @return
     */
    public Timestamp getCurrDateTime() {
        Calendar tCal = Calendar.getInstance();
        return new Timestamp(tCal.getTime().getTime());
    }

    /**
     * 取得当前日期时间 毫秒为0
     *
     * @return
     */
    public static Timestamp getCurrTime() {
        Calendar tCal = Calendar.getInstance();
        tCal.set(Calendar.MILLISECOND, 0);
        return new Timestamp(tCal.getTime().getTime());
    }
    
    /**
     * 获得最常见的日期格式内容 : 年-月-日 小时-分钟-秒
     *
     * @param ts
     * @return
     */
    public String getSDateTime(Timestamp ts) {
        return getDateFormat(ts, "yyyy-MM-dd HH:mm:ss");
    }

    /* 格式化日期 */
    public String getSTime(Timestamp ts) {
        return getDateFormat(ts, "HH:mm:ss");
    }

    /**
     * 获取当天的日期
     *
     * @return
     */
    public final static String getToday() {
        java.sql.Timestamp ts = new java.sql.Timestamp(System.currentTimeMillis());
        SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd", Locale.CHINA);
        return formatter.format(ts);

    }

    // 根据时间获得随机数
    public String getRnd() {
        Calendar tCal = Calendar.getInstance();
        Timestamp ts = new Timestamp(tCal.getTime().getTime());
        java.util.Date date = new java.util.Date(ts.getTime());
        SimpleDateFormat formatter = new SimpleDateFormat("yyyyMMddhhmmss", Locale.CHINA);
        String tmpStr = formatter.format(date) + Math.round(Math.random() * 1000 + 1);

        return tmpStr;
    }

    /**
     * 计算日期之间的差值 2004-3-25 增加
     *
     * @param dt1
     * @param dt2
     * @return
     */
    public int dateDiff(Timestamp dt1, Timestamp dt2) {
        long ldate1 = dt1.getTime();
        long ldate2 = dt2.getTime();
        return (int) ((ldate2 - ldate1) / (1000 * 60 * 60 * 24));
    }
    
    /**
     * 计算分钟
     *
     * @param dt1
     * @param dt2
     * @return
     */
    public int minuteDiff(Timestamp dt1, Timestamp dt2) {
        long ldate1 = dt1.getTime();
        long ldate2 = dt2.getTime();
        return (int) ((ldate2 - ldate1) / (1000 * 60));
    }
    
    /**
     * 获取明天的日期
     *
     * @return
     */
    public String getTomorrow() {
        return getNextDay(getToday());
    }

    /**
     * 获得当前日期的下一天
     *
     * @param date
     * @return
     */
    public String getNextDay(String date) {
        if (StringUtils.isBlank(date)) {
            return "";
        }
        SimpleDateFormat f = new SimpleDateFormat("yyyy-MM-dd", Locale.CHINA);
        Calendar calendar = Calendar.getInstance();
        try {
            calendar.setTime(f.parse(date));
        } catch (ParseException ex) {
            return date;
        }
        calendar.add(5, 1);
        return f.format(calendar.getTime());
    }

    /**
     * LST num为正:当前日期后num天是返回值 num为负:当前日期前num天是返回值 返回的日期的格式:yyyy-MM-dd
     */
    public static String getTheDay(int num) {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd", Locale.CHINA);
        GregorianCalendar gc = new GregorianCalendar();
        gc.add(GregorianCalendar.DATE, num);
        Date theday = gc.getTime();
        return sdf.format(theday);
    }

    /**
     * 将日期由String转换为Date类型
     *
     * @param date
     * @return
     * @throws ParseException
     */
    public static Date convertStringToDate(String sdate) throws ParseException {
    	String date = sdate;
        if (StringUtils.isBlank(date)) {
            date = getToday();
        }

        SimpleDateFormat objDateFormat = new SimpleDateFormat("yyyy-MM-dd", Locale.CHINA);
        Date objDate = objDateFormat.parse(date);

        return objDate;
    }

    /**
     * 将日期由String转换为Date类型
     *
     * @param date
     * @param format
     * @return
     * @throws ParseException
     */
    public static Date convertStringToDate(String sdate, String format) throws ParseException {
    	String date = sdate;
        SimpleDateFormat objDateFormat = new SimpleDateFormat(format, Locale.CHINA);
        if (StringUtils.isBlank(date)) {
            java.sql.Timestamp ts = new java.sql.Timestamp(System.currentTimeMillis());
            date = objDateFormat.format(ts);
        }

        Date objDate = objDateFormat.parse(date);

        return objDate;
    }


    /**
     * 将日期由yyyy年MM月String转换为Date类型
     *
     * @param date
     * @return
     * @throws ParseException
     */
    public static Date convertStringToDateCh(String sdate) throws ParseException {
    	String date = sdate;
        SimpleDateFormat objDateFormat = new SimpleDateFormat("yyyy年MM月", Locale.CHINA);

        if (StringUtils.isBlank(date)) {
            java.sql.Timestamp ts = new java.sql.Timestamp(System.currentTimeMillis());
            date = objDateFormat.format(ts);
        }

        Date objDate = objDateFormat.parse(date);

        return objDate;
    }
    
    /**
     * 取得指定年月的第一天
     * @param year
     * @param month
     * @return
     */
    public static String getLastDayOfMonthToString(int year, int month) {     
        Calendar cal = Calendar.getInstance();     
        cal.set(Calendar.YEAR, year);     
        cal.set(Calendar.MONTH, month - 1);     
        cal.set(Calendar.DAY_OF_MONTH,cal.getActualMaximum(Calendar.DATE));  
        return  new   SimpleDateFormat( "yyyy-MM-dd", Locale.CHINA).format(cal.getTime());  
    }
    
    /**
     * 取得指定年月的最后一天
     * @param year
     * @param month
     * @return
     */
    public static String getFirstDayOfMonthToString(int year, int month) {     
        Calendar cal = Calendar.getInstance();     
        cal.set(Calendar.YEAR, year);     
        cal.set(Calendar.MONTH, month - 1);  
        cal.set(Calendar.DAY_OF_MONTH,cal.getMinimum(Calendar.DATE));  
        return   new   SimpleDateFormat( "yyyy-MM-dd", Locale.CHINA).format(cal.getTime());  
    }
    
    /**
     * 取得指定年月的第一天
     * @param year
     * @param month
     * @return
     */
    public static Date getLastDayOfMonthToDate(int year, int month) {
        Calendar cal = Calendar.getInstance();     
        cal.set(Calendar.YEAR, year);     
        cal.set(Calendar.MONTH, month - 1);     
        cal.set(Calendar.DAY_OF_MONTH,cal.getActualMaximum(Calendar.DATE));
        return cal.getTime() ;
    }
    
    /**
     * 取得指定年月的最后一天
     * @param year
     * @param month
     * @return
     */
    public static Date getFirstDayOfMonthToDate(int year, int month) {     
        Calendar cal = Calendar.getInstance();     
        cal.set(Calendar.YEAR, year);     
        cal.set(Calendar.MONTH, month - 1);  
        cal.set(Calendar.DAY_OF_MONTH,cal.getMinimum(Calendar.DATE));  
        return cal.getTime();
    }
    
    /**
     * 得到一段时间内有多少周
     * @param startTime
     * @param endTime
     * @return
     */
    public static int getWeekCounts(Date startTime,Date endTime){
    	
    	Calendar c_begin = Calendar.getInstance();
        Calendar c_end = Calendar.getInstance();
        c_begin.setTime(startTime);
        c_end.setTime(endTime);
        
        int count = 1;
        
        while(c_begin.before(c_end)){
	        if(c_begin.get(Calendar.DAY_OF_WEEK)==Calendar.SUNDAY){
	            count++;
	        }
        	c_begin.add(Calendar.DAY_OF_YEAR, 1);
        }
        
        return count;
    }
    
    /**
     * 得到日期的年
     * @param date
     * @return
     */
    public static int getYearInDate(Date date){
    	Calendar cal = Calendar.getInstance();
    	cal.setTime(date);
    	return cal.get(Calendar.YEAR);
    	
    }

    /**
     * 当前时间处于一段时间的第几周
     * @param startTime
     * @param endTime
     * @return
     */
    public static int getWeekIndex(Date startTime,Date endTime){
    	
    	Calendar begin = Calendar.getInstance();
        Calendar end = Calendar.getInstance();
        begin.setTime(startTime);
        end.setTime(endTime);
        
        int count = 1;
        
        Calendar now = Calendar.getInstance();
        
        while(begin.before(end)){
        	
        	if(begin.get(Calendar.YEAR) == now.get(Calendar.YEAR)
        			&& begin.get(Calendar.MONTH) == now.get(Calendar.MONTH)
					&& begin.get(Calendar.DAY_OF_MONTH) == now.get(Calendar.DAY_OF_MONTH)){
        		return count ;
        	}
        	
        		
	        if(begin.get(Calendar.DAY_OF_WEEK)==Calendar.SUNDAY){
	            count++;
	        }
        	begin.add(Calendar.DAY_OF_YEAR, 1);
        }
        
        return count;
    }
    
    /**
     * 指定时间处于一段时间的第几周
     * @param startTime
     * @param endTime
     * @return
     */
    public static int getSpecifyWeekIndex(Date startTime,Date endTime,Date specifyDate){
    	
    	Calendar begin = Calendar.getInstance();
        Calendar end = Calendar.getInstance();
        begin.setTime(startTime);
        end.setTime(endTime);
        
        int count = 1;
        
        Calendar specify = Calendar.getInstance();
        specify.setTime(specifyDate);
        
        while(begin.before(end)){
        	
        	if(begin.get(Calendar.YEAR) == specify.get(Calendar.YEAR)
        			&& begin.get(Calendar.MONTH) == specify.get(Calendar.MONTH)
					&& begin.get(Calendar.DAY_OF_MONTH) == specify.get(Calendar.DAY_OF_MONTH)){
        		return count ;
        	}
        		
	        if(begin.get(Calendar.DAY_OF_WEEK)==Calendar.SUNDAY){
	            count++;
	        }
        	begin.add(Calendar.DAY_OF_YEAR, 1);
        }
        
        return count;
    }
    
}