package com.dl.common.utils;

import org.apache.ibatis.annotations.Param;

import java.util.Calendar;
import java.util.Date;

public class CalendarUtil {

    //获取年的开始日期时间
    public static Date getYearStartDate(Date date){
        Calendar calendar = Calendar.getInstance();
        //有参数则是参数年的日期时间，无参则默认当前年的日期时间
        if (null == date){calendar.setTime(new Date());}else {calendar.setTime(date);}
        int year = calendar.get(Calendar.YEAR);
        calendar.set(year, 0, 1, 0, 0, 0);
        return calendar.getTime();
    }

    //获取年的结束日期时间
    public static Date getYearEndDate(Date date){
        Calendar calendar = Calendar.getInstance();
        //有参数则是参数年的日期时间，无参则默认当前年的日期时间
        if (null == date){calendar.setTime(new Date());}else {calendar.setTime(date);}
        int year = calendar.get(Calendar.YEAR);
        calendar.set(year, 11, 31, 23, 59, 59);
        return calendar.getTime();
    }

    //获取季度开始的日期时间
    public static Date getSeasonStartDate (Date date) {
        Calendar calendar = Calendar.getInstance();
        //有参数则是参数的季度日期时间，无参则默认当前季度的日期时间
        if (null == date){calendar.setTime(new Date());}else {calendar.setTime(date);}
        int month = calendar.get(Calendar.MONTH);
        calendar.set(Calendar.MONTH, month / 3 * 3);
        calendar.set(Calendar.DATE, 1);

        int year = calendar.get(Calendar.YEAR);
        int month1 = calendar.get(Calendar.MONTH);
        int day = calendar.get(Calendar.DATE);

        calendar.set(year,month1,day,0,0,0);
        return calendar.getTime();
    }

    //获取季度的结束日期时间
    public static Date getSeasonEndDate (Date date) {
        Calendar calendar = Calendar.getInstance();
        //有参数则是参数的季度日期时间，无参则默认当前季度的日期时间
        if (null == date){calendar.setTime(new Date());}else {calendar.setTime(date);}
        int month = calendar.get(Calendar.MONTH);
        calendar.set(Calendar.MONTH, (month + 3) / 3 * 3);
        calendar.set(Calendar.DATE, 1);

        int year = calendar.get(Calendar.YEAR);
        int month1 = calendar.get(Calendar.MONTH);
        int dates = calendar.get(Calendar.DATE);
        calendar.set(year,month1,dates,23,59,59);

        Date date1 = new Date(calendar.getTime().getTime() - 24 * 60 * 60 * 1000);
        return date1;
    }

    //获取本月的开始时间
    public static Date getMonthStartDate(Date date){
        Calendar calendar = Calendar.getInstance();
        if (null == date){calendar.setTime(new Date());}else {calendar.setTime(date);}
        int year = calendar.get(Calendar.YEAR);
        int month = calendar.get(Calendar.MONTH);
        calendar.set(year, month, 1, 0, 0, 0);
        return calendar.getTime();
    }

    //获取本月的结束时间
    public static Date getMonthEndDate(Date date){
        Calendar calendar = Calendar.getInstance();
        if (null == date){calendar.setTime(new Date());}else {calendar.setTime(date);}
        int year = calendar.get(Calendar.YEAR);
        int month = calendar.get(Calendar.MONTH);
        calendar.set(year, month + 1, 1-1, 23, 59, 59);
        return calendar.getTime();
    }

    //获取周的开始时间
    public static Date getWeekStartDate(Date date){
        Calendar calendar = Calendar.getInstance();
        if (null == date){calendar.setTime(new Date());}else {calendar.setTime(date);}
        int d = 0;
        if (Calendar.DAY_OF_WEEK == 1) {
            d = -6;
        } else {
            d = 2 - calendar.get(Calendar.DAY_OF_WEEK);
        }
        // 获取本周的第一天
        calendar.add(Calendar.DAY_OF_WEEK, d);
        calendar.set(Calendar.HOUR_OF_DAY, 0);
        calendar.set(Calendar.MINUTE, 0);
        calendar.set(Calendar.SECOND, 0);

        return calendar.getTime();
    }

    //获取周的结束时间
    public static Date getWeekEndDate(Date date){
        Calendar calendar = Calendar.getInstance();
        if (null == date){calendar.setTime(new Date());}else {calendar.setTime(date);}
        calendar.add(Calendar.DAY_OF_WEEK, 6);
        calendar.set(Calendar.HOUR_OF_DAY, 23);
        calendar.set(Calendar.MINUTE, 59);
        calendar.set(Calendar.SECOND, 59);
        return calendar.getTime();
    }

}