package clock;

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

public class Lunar {
    private int year;
    private int month;
    private int day;
    private boolean leap;
    final static String chineseNumber[] = {"一", "二", "三", "四", "五", "六", "七", "八", "九", "十", "十一", "十二"};
    static SimpleDateFormat chineseDateFormat = new SimpleDateFormat("yyyy年MM月dd日");
    final static long[] lunarInfo = new long[]
    {0x04bd8, 0x04ae0, 0x0a570, 0x054d5, 0x0d260, 0x0d950, 0x16554, 0x056a0, 0x09ad0, 0x055d2,
     0x04ae0, 0x0a5b6, 0x0a4d0, 0x0d250, 0x1d255, 0x0b540, 0x0d6a0, 0x0ada2, 0x095b0, 0x14977,
     0x04970, 0x0a4b0, 0x0b4b5, 0x06a50, 0x06d40, 0x1ab54, 0x02b60, 0x09570, 0x052f2, 0x04970,
     0x06566, 0x0d4a0, 0x0ea50, 0x06e95, 0x05ad0, 0x02b60, 0x186e3, 0x092e0, 0x1c8d7, 0x0c950,
     0x0d4a0, 0x1d8a6, 0x0b550, 0x056a0, 0x1a5b4, 0x025d0, 0x092d0, 0x0d2b2, 0x0a950, 0x0b557,
     0x06ca0, 0x0b550, 0x15355, 0x04da0, 0x0a5d0, 0x14573, 0x052d0, 0x0a9a8, 0x0e950, 0x06aa0,
     0x0aea6, 0x0ab50, 0x04b60, 0x0aae4, 0x0a570, 0x05260, 0x0f263, 0x0d950, 0x05b57, 0x056a0,
     0x096d0, 0x04dd5, 0x04ad0, 0x0a4d0, 0x0d4d4, 0x0d250, 0x0d558, 0x0b540, 0x0b5a0, 0x195a6,
     0x095b0, 0x049b0, 0x0a974, 0x0a4b0, 0x0b27a, 0x06a50, 0x06d40, 0x0af46, 0x0ab60, 0x09570,
     0x04af5, 0x04970, 0x064b0, 0x074a3, 0x0ea50, 0x06b58, 0x055c0, 0x0ab60, 0x096d5, 0x092e0,
     0x0c960, 0x0d954, 0x0d4a0, 0x0da50, 0x07552, 0x056a0, 0x0abb7, 0x025d0, 0x092d0, 0x0cab5,
     0x0a950, 0x0b4a0, 0x0baa4, 0x0ad50, 0x055d9, 0x04ba0, 0x0a5b0, 0x15176, 0x052b0, 0x0a930,
     0x07954, 0x06aa0, 0x0ad50, 0x05b52, 0x04b60, 0x0a6e6, 0x0a4e0, 0x0d260, 0x0ea65, 0x0d530,
     0x05aa0, 0x076a3, 0x096d0, 0x04bd7, 0x04ad0, 0x0a4d0, 0x1d0b6, 0x0d250, 0x0d520, 0x0dd45,
     0x0b5a0, 0x056d0, 0x055b2, 0x049b0, 0x0a577, 0x0a4b0, 0x0aa50, 0x1b255, 0x06d20, 0x0ada0};

    //====== 傳回農歷 y年的總天數
    final private static int yearDays(int y) {
        int i, sum = 348;
        for (i = 0x8000; i > 0x8; i >>= 1) {
            if ((lunarInfo[y - 1900] & i) != 0) sum += 1;
        }
        return (sum + leapDays(y));
    }

    //====== 傳回農歷 y年閏月的天數
    final private static int leapDays(int y) {
        if (leapMonth(y) != 0) {
            if ((lunarInfo[y - 1900] & 0x10000) != 0)
                return 30;
            else
                return 29;
        } else
            return 0;
    }

    //====== 傳回農歷 y年閏哪個月 1-12 , 沒閏傳回 0
    final private static int leapMonth(int y) {
        return (int) (lunarInfo[y - 1900] & 0xf);
    }

    //====== 傳回農歷 y年m月的總天數
    final private static int monthDays(int y, int m) {
        if ((lunarInfo[y - 1900] & (0x10000 >> m)) == 0)
            return 29;
        else
            return 30;
    }

    //====== 傳回農歷 y年的生肖
    final public String animalsYear() {
        final String[] Animals = new String[]{"鼠", "牛", "虎", "兔", "龍", "蛇", "馬", "羊", "猴", "雞", "狗", "豬"};
        return Animals[(year - 4) % 12];
    }

    //====== 傳入 月日的offset 傳回干支, 0=甲子
    final private static String cyclicalm(int num) {
        final String[] Gan = new String[]{"甲", "乙", "丙", "丁", "戊", "己", "庚", "辛", "壬", "癸"};
        final String[] Zhi = new String[]{"子", "丑", "寅", "卯", "辰", "巳", "午", "未", "申", "酉", "戌", "亥"};
        return (Gan[num % 10] + Zhi[num % 12]);
    }



    final public String WorldFestival(int m,int d)
    {
        
    		 final String[] sFtv = new String[] { "0101*元旦", "0214 情人節",
    		 "0308 婦女節", "0312 植樹節", "0314 國際警察日", "0315 消費者權益日", "0323 世界氣象日",
    		 "0401 愚人節", "0407 世界衛生日", "0501*勞動節", "0504 青年節",
    		 "0508 紅十字日",
    		 "0512 護士節", "0515 國際家庭日", "0517 世界電信日", "0519 全國助殘日", "0531 世界無煙日",
    		 "0601 兒童節", "0605 世界環境日", "0606 全國愛眼日", "0623 奧林匹克日", "0625 全國土地日",
    		 "0626 反毒品日", "0701 建黨節", "0707 抗戰紀念日", "0711 世界人口日", "0801 建軍節",
    		 "0908 國際掃盲日", "0909 毛澤東逝世紀念", "0910 教師節", "0917 國際和平日",
    		 "0920 國際愛牙日", "0922 國際聾人節", "0927 世界旅游日", "0928 孔子誕辰", "1001*國慶節",
    		 "1004 世界動物日", "1006 老人節", "1007 國際住房日", "1009 世界郵政日", "1015 國際盲人節",
    		 "1016 世界糧食日", "1024 聯合國日", "1031 萬圣節", "1108 中國記者日", "1109 消防宣傳日",
    		 "1112 孫中山誕辰", "1114 世界糖尿病日", "1117 國際大學生節", "1128 感恩節",
    		 "1201 世界艾滋病日", "1203 世界殘疾人日", "1209 世界足球日", "1220 澳門回歸",
    		 "1225 圣誕節", "1226 毛澤東誕辰" };
    		
    		 

    		 String solarFestival = null;
			for (int i = 0; i < sFtv.length; i++) {
    	           
					if (Integer.parseInt(sFtv[i].substring(0, 2)) ==m		 
    	                    && Integer.parseInt(sFtv[i].substring(2, 4)) ==d) {
    	            solarFestival = sFtv[i].substring(5);
    	            }
    	         }
		
			return solarFestival;
			
    }

    //====== 傳入 offset 傳回干支, 0=甲子
    final public String cyclical() {
        int num = year - 1900 + 36;
        return (cyclicalm(num));
    }

    /** *//**
     * 傳出y年m月d日對應的農歷.
     * yearCyl3:農歷年與1864的相差數              ?
     * monCyl4:從1900年1月31日以來,閏月數
     * dayCyl5:與1900年1月31日相差的天數,再加40      ?
     * @param cal 
     * @return 
     */
    public Lunar(Calendar cal) {
        @SuppressWarnings("unused") int yearCyl, monCyl, dayCyl;
        int leapMonth = 0;
        Date baseDate = null;
        try {
            baseDate = chineseDateFormat.parse("1900年1月31日");
        } catch (ParseException e) {
            e.printStackTrace();  //To change body of catch statement use Options | File Templates.
        }

        //求出和1900年1月31日相差的天數
        int offset = (int) ((cal.getTime().getTime() - baseDate.getTime()) / 86400000L);
        dayCyl = offset + 40;
        monCyl = 14;

        //用offset減去每農歷年的天數
        // 計算當天是農歷第幾天
        //i最終結果是農歷的年份
        //offset是當年的第幾天
        int iYear, daysOfYear = 0;
        for (iYear = 1900; iYear < 2050 && offset > 0; iYear++) {
            daysOfYear = yearDays(iYear);
            offset -= daysOfYear;
            monCyl += 12;
        }
        if (offset < 0) {
            offset += daysOfYear;
            iYear--;
            monCyl -= 12;
        }
        //農歷年份
        year = iYear;

        yearCyl = iYear - 1864;
        leapMonth = leapMonth(iYear); //閏哪個月,1-12
        leap = false;

        //用當年的天數offset,逐個減去每月（農歷）的天數，求出當天是本月的第幾天
        int iMonth, daysOfMonth = 0;
        for (iMonth = 1; iMonth < 13 && offset > 0; iMonth++) {
            //閏月
            if (leapMonth > 0 && iMonth == (leapMonth + 1) && !leap) {
                --iMonth;
                leap = true;
                daysOfMonth = leapDays(year);
            } else
                daysOfMonth = monthDays(year, iMonth);

            offset -= daysOfMonth;
            //解除閏月
            if (leap && iMonth == (leapMonth + 1)) leap = false;
            if (!leap) monCyl++;
        }
        //offset為0時，并且剛才計算的月份是閏月，要校正
        if (offset == 0 && leapMonth > 0 && iMonth == leapMonth + 1) {
            if (leap) {
                leap = false;
            } else {
                leap = true;
                --iMonth;
                --monCyl;
            }
        }
        //offset小于0時，也要校正
        if (offset < 0) {
            offset += daysOfMonth;
            --iMonth;
            --monCyl;
        }
        month = iMonth;
        day = offset + 1;
    }

    public static String getChinaDayString(int day) {
        String chineseTen[] = {"初", "十", "廿", "卅"};
        int n = day % 10 == 0 ? 9 : day % 10 - 1;
        if (day > 30)
            return "";
        if (day == 10)
            return "初十";
        else
            return chineseTen[day / 10] + chineseNumber[n];
    }

  public String toString() {
        return year + "年" + (leap ? "閏" : "") + chineseNumber[month - 1] + "月" + getChinaDayString(day);
    }

  /*  public static void main(String[] args) throws ParseException {
        Calendar today = Calendar.getInstance();
        today.setTime(chineseDateFormat.parse("2003年1月1日"));
        Lunar lunar = new Lunar(today);

        System.out.println("北京時間：" + chineseDateFormat.format(today.getTime()) + "　農歷" + lunar);
    }*/
}