package com.info.sn.utils;

import android.content.Context;
import android.content.Intent;
import android.nfc.Tag;
import android.os.SystemClock;
import android.text.TextUtils;
import android.util.Log;

import androidx.annotation.NonNull;

import com.info.sn.service.ManagerService;

import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Arrays;
import java.util.Calendar;
import java.util.Date;

public class TimeUtils {
    private static final String TAG = TimeUtils.class.getSimpleName();
    private static DateFormat df = new SimpleDateFormat("HH:mm");
    public static final String START_TIME_KEY = "START_TIME";
    public static final String END_TIME_KEY = "END_TIME";
    public static final String WEEK_START_TIME_KEY = "WEEK_START_TIME";
    public static final String WEEK_END_TIME_KEY = "WEEK_END_TIME";
    public static long dayTime = 60 * 60 * 24 * 1000;
    public static long minuteTime = 60 * 1000;


    public static String getNowTime() {
        long nowTime = System.currentTimeMillis();
        DateFormat df = ContralTime.getDf();
        return df.format(nowTime);
    }

//    public static boolean CurrentInTimeScope(ContralTime contralTime) {
//        boolean result = true;
//        final long aDayInMillis = 1000 * 60 * 60 * 24;
//        long currentTimeMillis = System.currentTimeMillis();
//
//    }

    public static ContralTime String2WorkingTime(Context context, @NonNull String timeText) {
        DateFormat df = ContralTime.getDf();
        String[] time = timeText.trim().split("-");
        if (time.length != 2) {
//            return null;
            throw new RuntimeException("Time format error!" + Arrays.toString(time));
        }
        try {
            SPUtils.put(context, START_TIME_KEY, time[0].trim());
            SPUtils.put(context, END_TIME_KEY, time[1].trim());
            Date startDate = df.parse(time[0].trim());
            Date endDate = df.parse(time[1].trim());
            ContralTime contralTime = new ContralTime();
//            if (date1.getTime() < date2.getTime()) {
            contralTime.setStartTime(df.format(startDate));
            contralTime.setEndTime(df.format(endDate));
//            } else {
//                contralTime.setStartTime(df.format(date2));
//                contralTime.setEndTime(df.format(date1));
//            }
            return contralTime;
        } catch (ParseException e) {
            e.printStackTrace();
            return null;
        }
    }

    public static ContralTime String2WeekTime(Context context, @NonNull String timeText) {
        DateFormat df = ContralTime.getDf();
        String[] time = timeText.trim().split("-");
        if (time.length != 2) {
//            return null;
            throw new RuntimeException("Time format error!" + Arrays.toString(time));
        }
        try {
            SPUtils.put(context, WEEK_START_TIME_KEY, time[0].trim());
            SPUtils.put(context, WEEK_END_TIME_KEY, time[1].trim());
            Date startDate = df.parse(time[0].trim());
            Date endDate = df.parse(time[1].trim());
            ContralTime contralTime = new ContralTime();
//            if (date1.getTime() < date2.getTime()) {
            contralTime.setStartTime(df.format(startDate));
            contralTime.setEndTime(df.format(endDate));
//            } else {
//                contralTime.setStartTime(df.format(date2));
//                contralTime.setEndTime(df.format(date1));
//            }
            return contralTime;
        } catch (ParseException e) {
            e.printStackTrace();
            return null;
        }
    }

    public static ContralTime getWorkingDayContralTime(Context context) {
        String startTime = (String) SPUtils.get(context, START_TIME_KEY, "00:00");
        String endTime = (String) SPUtils.get(context, END_TIME_KEY, "00:00");
        return getContralTime(context, startTime, endTime);
    }

    public static ContralTime getWeekDayContralTime(Context context) {
        String startTime = (String) SPUtils.get(context, WEEK_START_TIME_KEY, "00:00");
        String endTime = (String) SPUtils.get(context, WEEK_END_TIME_KEY, "00:00");
        return getContralTime(context, startTime, endTime);
    }

    public static boolean inContralTime(ContralTime workingTime, ContralTime weekTime) {
        if (inWeekDay()) {
            if (weekTime == null) {
                return false;
            } else {
                return weekTime.inControlTime();
            }
        } else {
            if (workingTime == null) {
                return false;
            } else {
                return workingTime.inControlTime();
            }
        }
    }

    public static ContralTime getContralTime(Context context, String startTime, String endTime) {
        if (null == startTime || null == endTime || ("00:00".equals(startTime) && "00:00".equals(endTime))) {
            return null;
        } else {
            try {
                Date startDate = df.parse(startTime.trim());
                Date endDate = df.parse(endTime.trim());
                ContralTime contralTime = new ContralTime();
                contralTime.setStartTime(df.format(startDate));
                contralTime.setEndTime(df.format(endDate));
                return contralTime;
            } catch (ParseException e) {
                e.printStackTrace();
                return null;
            }
        }
    }

    public static String getNowTimeString(Context context) {
        ContralTime work = getWorkingDayContralTime(context);
        ContralTime week = getWeekDayContralTime(context);
        StringBuilder stringBuilder = new StringBuilder();
        if (work != null) {
            stringBuilder.append("周一至周五：").append(work).append("\n");
        }
        if (week != null) {
            stringBuilder.append("周末：").append(week);
        }
        return stringBuilder.toString();
    }

    public static void setEmpty(Context context) {
        SPUtils.put(context, START_TIME_KEY, "00:00");
        SPUtils.put(context, END_TIME_KEY, "00:00");
        SPUtils.put(context, WEEK_START_TIME_KEY, "00:00");
        SPUtils.put(context, WEEK_END_TIME_KEY, "00:00");
        Intent intent = new Intent();
        intent.setAction(ManagerService.ACTION_UPDATE);
        context.sendBroadcast(intent);
    }

    /**
     * 获取格式化后的时间
     *
     * @param time 时间戳
     * @return 时间戳格式化文本
     */
    public static String getDate(long time) {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        String finaWayDate = sdf.format(time);
        Log.e(TAG, "getDate: " + finaWayDate);
        return finaWayDate;
    }

    /**
     * 获取周几
     *
     * @return 周几的数字
     */
    public static int getWeekDay() {
        long time = System.currentTimeMillis();
        Log.e(TAG, "getWeekDay: " + time);
        return getWeekDay(time);
    }

    /**
     * 获取周几
     *
     * @param time 时间戳
     * @return 周几的数字 1-7
     */
    public static int getWeekDay(long time) {
        getDate(time);
        Calendar now = Calendar.getInstance();
        now.setTimeInMillis(time);
        //一周第一天是否为星期天
        boolean isFirstSunday = (now.getFirstDayOfWeek() == Calendar.SUNDAY);
        //获取周几
        int weekDay = now.get(Calendar.DAY_OF_WEEK);
        //若一周第一天为星期天，则-1
        if (isFirstSunday) {
            weekDay = weekDay - 1;
            if (weekDay == 0) {
                weekDay = 7;
            }
        }
        return weekDay;
    }

    private String[] weekDays = {"星期一", "星期二", "星期三", "星期四", "星期五", "星期六", "星期日"};

    /**
     * 获取星期几
     *
     * @return 星期的文本
     */
    public String getWeekDayString() {
        return weekDays[getWeekDay() - 1];
    }

    /**
     * 获取星期几
     *
     * @param time 时间戳
     * @return 星期的文本
     */
    public String getWeekDayString(long time) {
        return weekDays[getWeekDay(time) - 1];
    }

    /**
     * 是否未周末
     *
     * @return 周末返回ture 工作日返回false
     */
    public static boolean inWeekDay() {
        long time = System.currentTimeMillis();
        return inWeekDay(time);
    }

    /**
     * 是否未周末
     *
     * @param time 时间戳
     * @return 周末返回ture 工作日返回false
     */
    public static boolean inWeekDay(long time) {
        int weekDay = getWeekDay(time);
        if (weekDay > 5) {
            return true;
        } else {
            return false;
        }
    }

    public static void setSystemTime(long time) {
        SystemClock.setCurrentTimeMillis(time);
    }

    public static class ContralTime {
        //format HH:mm
        String startTime;
        String endTime;

        public ContralTime() {

        }

        public ContralTime(String startT, String endT) {
            this.startTime = startT;
            this.endTime = endT;
        }

        public String getStartTime() {
            return startTime;
        }


        public void setStartTime(String startT) {
            this.startTime = startT;
        }

        public String getEndTime() {
            return endTime;
        }

        public void setEndTime(String endT) {
            this.endTime = endT;
        }

        public static DateFormat getDf() {
            return df;
        }

        public static void setDf(DateFormat d) {
            df = d;
        }

        public String getNowTimeString(long time) {
            return df.format(new Date(time));
        }

        public boolean inControlTime() {
            long time = System.currentTimeMillis();
            return inControlTime(time);
        }

        public boolean inControlTime(long time) {
            return inControlTime(df.format(new Date(time)));
        }

        public boolean inControlTime(String time) {
            if (TextUtils.isEmpty(time)) {
                throw new RuntimeException("Time is empty");
            } else {
                if (!time.contains(":")) {
                    throw new RuntimeException("Time format error");
                }
            }
            try {
                Date startDate = df.parse(startTime);
                Date endDate = df.parse(endTime);
                Date nowDate = df.parse(time);
                if (startDate.getTime() > endDate.getTime()) {
                    //开始时间大于结束时间 列 16：00-01：00
                    endDate.setTime(endDate.getTime() + dayTime);
                }
                Log.e(TAG, "inControlTime: " + (startDate.getTime() - minuteTime));
                assert nowDate != null;
                if (nowDate.getTime() <= startDate.getTime() - minuteTime || nowDate.getTime() >= endDate.getTime()) {
                    return true;
                } else {
                    return false;
                }
            } catch (ParseException e) {
                e.printStackTrace();
            }
            return false;
        }

        @NonNull
        @Override
        public String toString() {
            return startTime + "\t-\t" + endTime;
        }
    }

    private static SntpClient mNtpClient;

    public static long getTimeFromNtpServer(String hostAddress) {
        Log.d(TAG, "getTimeFromNtpServer()");
        if (TextUtils.isEmpty(hostAddress)) {
            Log.e(TAG, "Ntp host is null.");
            return -1;
        }
        if (mNtpClient == null) {
            mNtpClient = new SntpClient();
        }
        boolean isSuccessful = mNtpClient.requestTime(hostAddress, 20000);
        Log.e(TAG, "requestTime:" + isSuccessful);
        if (isSuccessful) {
            long now = mNtpClient.getNtpTime();//now就是获取的时间
            return now;
        } else {

        }
        return -1;
    }

    public static class SntpClient {
        private static final String TAG = "SntpClient";

        private static final int REFERENCE_TIME_OFFSET = 16;
        private static final int ORIGINATE_TIME_OFFSET = 24;
        private static final int RECEIVE_TIME_OFFSET = 32;
        private static final int TRANSMIT_TIME_OFFSET = 40;
        private static final int NTP_PACKET_SIZE = 48;

        private static final int NTP_PORT = 123;
        private static final int NTP_MODE_CLIENT = 3;
        private static final int NTP_VERSION = 3;

        // Number of seconds between Jan 1, 1900 and Jan 1, 1970
        // 70 years plus 17 leap days
        private static final long OFFSET_1900_TO_1970 = ((365L * 70L) + 17L) * 24L * 60L * 60L;

        // system time computed from NTP server response
        private long mNtpTime;

        // value of SystemClock.elapsedRealtime() corresponding to mNtpTime
        private long mNtpTimeReference;

        // round trip time in milliseconds
        private long mRoundTripTime;

        /**
         * Sends an SNTP request to the given host and processes the response.
         *
         * @param host    host name of the server.
         * @param timeout network timeout in milliseconds.
         * @return true if the transaction was successful.
         */
        public boolean requestTime(String host, int timeout) {
            DatagramSocket socket = null;
            try {
                socket = new DatagramSocket();
                socket.setSoTimeout(timeout);
                InetAddress address = InetAddress.getByName(host);
                byte[] buffer = new byte[NTP_PACKET_SIZE];
                DatagramPacket request = new DatagramPacket(buffer,
                        buffer.length, address, NTP_PORT);

                // set mode = 3 (client) and version = 3
                // mode is in low 3 bits of first byte
                // version is in bits 3-5 of first byte
                buffer[0] = NTP_MODE_CLIENT | (NTP_VERSION << 3);

                // get current time and write it to the request packet
                long requestTime = System.currentTimeMillis();
                Log.d(TAG, "RequestTime:" + new Date(requestTime));
                long requestTicks = SystemClock.elapsedRealtime();
                writeTimeStamp(buffer, TRANSMIT_TIME_OFFSET, requestTime);

                socket.send(request);

                // read the response
                DatagramPacket response = new DatagramPacket(buffer,
                        buffer.length);
                socket.receive(response);
                long responseTicks = SystemClock.elapsedRealtime();
                long responseTime = requestTime
                        + (responseTicks - requestTicks);

                // extract the results
                long originateTime = readTimeStamp(buffer,
                        ORIGINATE_TIME_OFFSET);
                long receiveTime = readTimeStamp(buffer, RECEIVE_TIME_OFFSET);
                long transmitTime = readTimeStamp(buffer, TRANSMIT_TIME_OFFSET);
                long roundTripTime = responseTicks - requestTicks
                        - (transmitTime - receiveTime);
                // receiveTime = originateTime + transit + skew
                // responseTime = transmitTime + transit - skew
                // clockOffset = ((receiveTime - originateTime) + (transmitTime
                // - responseTime))/2
                // = ((originateTime + transit + skew - originateTime) +
                // (transmitTime - (transmitTime + transit - skew)))/2
                // = ((transit + skew) + (transmitTime - transmitTime - transit
                // + skew))/2
                // = (transit + skew - transit + skew)/2
                // = (2 * skew)/2 = skew
                long clockOffset = ((receiveTime - requestTime) + (transmitTime - System.currentTimeMillis())) / 2;
                // if (false) Log.d(TAG, "round trip: " + roundTripTime +
                // " ms");
                // if (false) Log.d(TAG, "clock offset: " + clockOffset +
                // " ms");

                // save our results - use the times on this side of the network
                // latency
                // (response rather than request time)
                mNtpTime = System.currentTimeMillis() + clockOffset;
//              mNtpTime = transmitTime;
                mNtpTimeReference = responseTicks;
                mRoundTripTime = roundTripTime;
            } catch (Exception e) {
                if (false)
                    Log.e(TAG, "request time failed:" + e);
                e.printStackTrace();
                return false;
            } finally {
                if (socket != null) {
                    socket.close();
                }
            }

            return true;
        }

        /**
         * Returns the time computed from the NTP transaction.
         *
         * @return time value computed from NTP server response.
         */
        public long getNtpTime() {
            return mNtpTime;
        }

        /**
         * Returns the reference clock value (value of
         * SystemClock.elapsedRealtime()) corresponding to the NTP time.
         *
         * @return reference clock corresponding to the NTP time.
         */
        public long getNtpTimeReference() {
            return mNtpTimeReference;
        }

        /**
         * Returns the round trip time of the NTP transaction
         *
         * @return round trip time in milliseconds.
         */
        public long getRoundTripTime() {
            return mRoundTripTime;
        }

        /**
         * Reads an unsigned 32 bit big endian number from the given offset in
         * the buffer.
         */
        private long read32(byte[] buffer, int offset) {
            byte b0 = buffer[offset];
            byte b1 = buffer[offset + 1];
            byte b2 = buffer[offset + 2];
            byte b3 = buffer[offset + 3];

            // convert signed bytes to unsigned values
            int i0 = ((b0 & 0x80) == 0x80 ? (b0 & 0x7F) + 0x80 : b0);
            int i1 = ((b1 & 0x80) == 0x80 ? (b1 & 0x7F) + 0x80 : b1);
            int i2 = ((b2 & 0x80) == 0x80 ? (b2 & 0x7F) + 0x80 : b2);
            int i3 = ((b3 & 0x80) == 0x80 ? (b3 & 0x7F) + 0x80 : b3);

            return ((long) i0 << 24) + ((long) i1 << 16) + ((long) i2 << 8)
                    + (long) i3;
        }

        /**
         * Reads the NTP time stamp at the given offset in the buffer and
         * returns it as a system time (milliseconds since January 1, 1970).
         */
        private long readTimeStamp(byte[] buffer, int offset) {
            long seconds = read32(buffer, offset);
            long fraction = read32(buffer, offset + 4);
            return ((seconds - OFFSET_1900_TO_1970) * 1000)
                    + ((fraction * 1000L) / 0x100000000L);
        }

        /**
         * Writes system time (milliseconds since January 1, 1970) as an NTP
         * time stamp at the given offset in the buffer.
         */
        private void writeTimeStamp(byte[] buffer, int offset, long time) {
            long seconds = time / 1000L;
            long milliseconds = time - seconds * 1000L;
            seconds += OFFSET_1900_TO_1970;

            // write seconds in big endian format
            buffer[offset++] = (byte) (seconds >> 24);
            buffer[offset++] = (byte) (seconds >> 16);
            buffer[offset++] = (byte) (seconds >> 8);
            buffer[offset++] = (byte) (seconds >> 0);

            long fraction = milliseconds * 0x100000000L / 1000L;
            // write fraction in big endian format
            buffer[offset++] = (byte) (fraction >> 24);
            buffer[offset++] = (byte) (fraction >> 16);
            buffer[offset++] = (byte) (fraction >> 8);
            // low order bits should be random data
            buffer[offset++] = (byte) (Math.random() * 255.0);
        }
    }
}