package com.example.administrator.ximengjianyu.utils;

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

/**
 * Created by xukai on 2017/2/14.
 */
public class TimeUtils {

    /**
     * 该方法用来获取当前的系统时间，并格式化事件
     */
    public String getCurrentTime(){
        long timeMillis = System.currentTimeMillis();
        SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
        Date curDate = new Date(timeMillis);
        String strData = formatter.format(curDate);
        return strData;
    }

    /**
     * 获取当前年份
     *
     * @return
     */
    public static int getYear() {
        return Calendar.getInstance().get(Calendar.YEAR);
    }

    /**
     * 获取当前月份
     *
     * @return
     */
    public static int getMonth() {
        return Calendar.getInstance().get(Calendar.MONTH) + 1;
    }

    /**
     * 获取当前日期是该月的第几天
     *
     * @return
     */
    public static int getCurrentDayOfMonth() {
        return Calendar.getInstance().get(Calendar.DAY_OF_MONTH);
    }

    /**
     * 获取当前日期是该周的第几天
     *
     * @return
     */
    public static int getCurrentDayOfWeek() {
        return Calendar.getInstance().get(Calendar.DAY_OF_WEEK);
    }

    /**
     * 获取当前是几点
     */
    public static int getHour() {
        return Calendar.getInstance().get(Calendar.HOUR_OF_DAY);//二十四小时制
    }

    /**
     * 获取当前是几分
     *
     * @return
     */
    public static int getMinute() {
        return Calendar.getInstance().get(Calendar.MINUTE);
    }

    /**
     * 获取当前秒
     *
     * @return
     */
    public static int getSecond() {
        return Calendar.getInstance().get(Calendar.SECOND);
    }

    /**
     * 根据传入的年份和月份，获取当前月份的日历分布
     *
     * @param year
     * @param month
     * @return
     */
    public static int[][] getDayOfMonthFormat(int year, int month) {
        Calendar calendar = Calendar.getInstance();
        calendar.set(year, month - 1, 1);//设置时间为每月的第一天
        //设置日历格式数组,6行7列
        int days[][] = new int[6][7];
        //设置该月的第一天是周几
        int daysOfFirstWeek = calendar.get(Calendar.DAY_OF_WEEK);
        //设置本月有多少天
        int daysOfMonth = getDaysOfMonth(year, month);
        //设置上个月有多少天
        int daysOfLastMonth = getLastDaysOfMonth(year, month);
        int dayNum = 1;
        int nextDayNum = 1;
        //将日期格式填充数组
        for (int i = 0; i < days.length; i++) {         //最大值为5，从0开始，长度为6
            for (int j = 0; j < days[i].length; j++) {  //j的长度为7，最大值6
                if (i == 0 && j < daysOfFirstWeek - 1) {    //第一行 并且小于该月第一天的周几-1
//                    days[i][j] = 0;
                    days[i][j] = daysOfLastMonth - daysOfFirstWeek + 2 + j;
                } else if (dayNum <= daysOfMonth) {
                    days[i][j] = dayNum++;
                } else {
                    days[i][j] = nextDayNum++;
                }
            }
        }
        return days;
    }

    /**
     * 根据传入的年份和月份，判断上一个月有多少天
     *
     * @param year
     * @param month
     * @return
     */
    public static int getLastDaysOfMonth(int year, int month) {
        int lastDaysOfMonth = 0;
        if (month == 1) {
            lastDaysOfMonth = getDaysOfMonth(year - 1, 12);
        } else {
            lastDaysOfMonth = getDaysOfMonth(year, month - 1);
        }
        return lastDaysOfMonth;
    }

    /**
     * 根据传入的年份和月份，判断当前月有多少天
     *
     * @param year
     * @param month
     * @return
     */
    public static int getDaysOfMonth(int year, int month) {
        switch (month) {
            case 1:
            case 3:
            case 5:
            case 7:
            case 8:
            case 10:
            case 12:
                return 31;
            case 2:
                if (isLeap(year)) {
                    return 29;
                } else {
                    return 28;
                }
            case 4:
            case 6:
            case 9:
            case 11:
                return 30;
        }
        return -1;
    }

    /**
     * 判断是否为闰年
     *
     * @param year
     * @return
     */
    public static boolean isLeap(int year) {
        if ((year % 4 == 0 && year % 100 != 0) || year % 400 == 0) {
            return true;
        }
        return false;
    }

}