package com.zhongzheng.common.utils;

import com.aliyun.dysmsapi20170525.models.SendSmsRequest;
import com.aliyun.dysmsapi20170525.models.SendSmsResponse;
import com.aliyun.teaopenapi.models.Config;
import io.micrometer.core.lang.NonNull;

import java.io.UnsupportedEncodingException;
import java.nio.charset.StandardCharsets;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Iterator;
import java.util.Random;

public class ToolsUtils {

    public static final int EMU_PER_PX = 9525;

    /**
     * 获取模块编码参数
     */
    public static String getSmsCode()
    {
        Random random = new Random();
        String result="";
        for (int i=0;i<6;i++)
        {
            result+=random.nextInt(10);
        }
       return result;
    }

    public static String join(@NonNull CharSequence delimiter, @NonNull Iterable tokens) {
        final Iterator<?> it = tokens.iterator();
        if (!it.hasNext()) {
            return "";
        }
        final StringBuilder sb = new StringBuilder();
        sb.append(it.next());
        while (it.hasNext()) {
            sb.append(delimiter);
            sb.append(it.next());
        }
        return sb.toString();
    }

    public static final int emuToPx(double emu) {
        return DoubleUtils.div(emu, EMU_PER_PX).intValue();
    }

    public static String getEncoding(String str) {
        String encode = "GB2312";
        try {
            if (str.equals(new String(str.getBytes(encode), encode))) {
                String s = encode;
                return s;
            }
        } catch (Exception exception) {
        }
        encode = "ISO-8859-1";
        try {
            if (str.equals(new String(str.getBytes(encode), encode))) {
                String s1 = encode;
                return s1;
            }
        } catch (Exception exception1) {
        }
        encode = "UTF-8";
        try {
            if (str.equals(new String(str.getBytes(encode), encode))) {
                String s2 = encode;
                return s2;
            }
        } catch (Exception exception2) {
        }
        encode = "GBK";
        try {
            if (str.equals(new String(str.getBytes(encode), encode))) {
                String s3 = encode;
                return s3;
            }
        } catch (Exception exception3) {
        }
        return "";
    }

    /**
     * 字符串转换UTF-8编码
     *
     * @param string 字符串
     * @return java.lang.String
     * @date 2022/4/14.
     */
    public static String toUtf8String(String string) {
        StringBuilder stringBuffer = new StringBuilder();
        for (int i = 0; i < string.length(); i++) {
            char c = string.charAt(i);
            if (c <= 255) {
                stringBuffer.append(c);
            } else {
                byte[] b;
                try {
                    b = Character.toString(c).getBytes(StandardCharsets.UTF_8);
                } catch (Exception ex) {
                    b = new byte[0];
                }
                for (int value : b) {
                    int k = value;
                    if (k < 0) k += 256;
                    stringBuffer.append("%").append(Integer.toHexString(k).toUpperCase());
                }
            }
        }
        return stringBuffer.toString();
    }

    public static String StringToMd5(String psw) {
        {
            try {
                MessageDigest md5 = MessageDigest.getInstance("MD5");
                md5.update(psw.getBytes("UTF-8"));
                byte[] encryption = md5.digest();

                StringBuffer strBuf = new StringBuffer();
                for (int i = 0; i < encryption.length; i++) {
                    if (Integer.toHexString(0xff & encryption[i]).length() == 1) {
                        strBuf.append("0").append(Integer.toHexString(0xff & encryption[i]));
                    } else {
                        strBuf.append(Integer.toHexString(0xff & encryption[i]));
                    }
                }

                return strBuf.toString();
            } catch (NoSuchAlgorithmException e) {
                return "";
            } catch (UnsupportedEncodingException e) {
                return "";
            }
        }
    }

    public static String getCharAndNumr(int length) {
        Random random = new Random();
        StringBuffer valSb = new StringBuffer();
        String charStr = "0123456789abcdefghijklmnopqrstuvwxyz";
        int charLength = charStr.length();
        for (int i = 0; i < length; i++) {
            int index = random.nextInt(charLength);
            valSb.append(charStr.charAt(index));
        }
        return valSb.toString();
    }

}