package com.loper7.date_time_picker.utils.lunar
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import android.util.Log
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import com.loper7.date_time_picker.ext.getMaxDayAtYear
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import com.loper7.date_time_picker.utils.lunar.LunarConstants.LUNAR_DAY_NAMES
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import com.loper7.date_time_picker.utils.lunar.LunarConstants.LUNAR_DZ
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import com.loper7.date_time_picker.utils.lunar.LunarConstants.LUNAR_MONTH_NAMES
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import com.loper7.date_time_picker.utils.lunar.LunarConstants.LUNAR_TABLE
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import com.loper7.date_time_picker.utils.lunar.LunarConstants.LUNAR_TG
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import com.loper7.date_time_picker.utils.lunar.LunarConstants.MIN_LUNAR_YEAR
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import java.util.*
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open class Lunar(
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var year: Int,
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var month: Int,
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var isLeapMonth: Boolean,
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var day: Int,
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var hour: Int,
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var minute: Int,
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var seconds: Int
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) {
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companion object {
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fun getInstance(timeInMillis: Long): Lunar? {
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var calendar = Calendar.getInstance()
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calendar.timeInMillis = timeInMillis
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return getInstance(calendar)
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}
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fun getInstance(calendar: Calendar = Calendar.getInstance()): Lunar? {
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//传入的时间超出了计算范围
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if (!hasLunarInfo(calendar)) return null
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var lunarYear: Int = calendar[Calendar.YEAR]
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var lunarMonth = 0
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var lunarDay = 0
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val lunarHour = calendar[Calendar.HOUR_OF_DAY]
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val lunarLeapMonth: Int
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var isLeap = false
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var doffset = calendar[Calendar.DAY_OF_YEAR] - 1
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var hexvalue = LUNAR_TABLE[lunarYear - MIN_LUNAR_YEAR]
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//农历正月的偏移
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var loffset = hexvalue and 0xFF
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//如果当前离1月1号的天数比正月离元月的天数还小那么则应该是上一个农历年
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if (loffset > doffset) {
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lunarYear--
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doffset += GregorianCalendar().getMaxDayAtYear(lunarYear)
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hexvalue = LUNAR_TABLE[lunarYear - MIN_LUNAR_YEAR]
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loffset = hexvalue and 0xFF
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}
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var days = doffset - loffset + 1
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//农历闰月
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lunarLeapMonth = hexvalue shr 8 and 0xF
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val len = if (lunarLeapMonth > 0) 13 else 12
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//开始循环取
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var v = 0
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var cd = 0
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for (i in 0 until len) {
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v = if (lunarLeapMonth in 1..i) {
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if (i == lunarLeapMonth) {
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hexvalue shr 12 and 0x1
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} else {
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hexvalue shr 24 - i + 1 and 0x1
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}
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} else {
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hexvalue shr 24 - i and 0x1
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}
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cd = 29 + v
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days -= cd
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if (days <= 0) {
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lunarDay = days + cd
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lunarMonth = i + 1
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if (lunarLeapMonth in 1..i) {
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isLeap = i == lunarLeapMonth
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--lunarMonth
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}
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break
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}
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}
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return Lunar(
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lunarYear,
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lunarMonth,
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isLeap,
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lunarDay,
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lunarHour,
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calendar[Calendar.MINUTE],
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calendar[Calendar.SECOND]
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)
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}
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/**
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* 是否有农历信息
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*
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* @param calendar
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* @return
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*/
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fun hasLunarInfo(calendar: Calendar): Boolean {
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return try {
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val syear = calendar[Calendar.YEAR]
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val dayoffset = calendar[Calendar.DAY_OF_YEAR] - 1
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val lindex = syear - MIN_LUNAR_YEAR
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if (lindex < 0 || lindex >= LUNAR_TABLE.size) {
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return false
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}
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var lyear = syear
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val hexValue = LUNAR_TABLE[lindex]
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val ldayoffset = hexValue and 0xFF
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if (ldayoffset > dayoffset) {
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lyear--
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}
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lyear >= MIN_LUNAR_YEAR
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} catch (e: Throwable) {
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e.printStackTrace()
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false
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}
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}
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}
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/**
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* 获取农历干支纪年
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*
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* @return
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*/
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val yearName: String
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get() {
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var tg = LUNAR_TG[(year - 4) % 10]
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var dz = LUNAR_DZ[(year - 4) % 12]
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return "${tg}${dz}年"
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}
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/**
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* 获取农历月名称
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*
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* @return
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*/
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val monthName: String
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get() = (if (isLeapMonth) "闰" else "") + LUNAR_MONTH_NAMES[month - 1]
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/**
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* 获取农历日名称
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*
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* @return
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*/
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val dayName: String
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get() = LUNAR_DAY_NAMES[day - 1]
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/**
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* 获取农历时辰名称
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*/
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val hourName: String
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get() = "${LUNAR_DZ[(hour + 1) / 2 % 12]}时"
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/**
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* 获取农历年月中最多的天数
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*/
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fun getMaxDayInMonth(): Int {
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val index: Int = year - MIN_LUNAR_YEAR
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val hexValue: Int = LUNAR_TABLE[index]
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return if (isLeapMonth) {
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(hexValue shr 12 and 0x1) + 29
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} else (hexValue shr 24 - month + 1 and 0x1) + 29
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}
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override fun equals(o: Any?): Boolean {
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if (o == null || o !is Lunar) return false
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return o.year == year && o.month == month && o.isLeapMonth == isLeapMonth
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}
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override fun toString(): String {
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var map = mutableMapOf<String, Any>()
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map["year"] = year
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map["month"] = month
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map["day"] = day
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map["hour"] = hour
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map["minute"] = minute
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map["seconds"] = seconds
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map["isLeapMonth"] = isLeapMonth
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map["yearName"] = yearName
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map["monthName"] = monthName
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map["dayName"] = dayName
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map["hourName"] = hourName
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return map.toString()
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}
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}
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