package safeluck.drive.evaluation.util;

import android.content.res.Resources;
import android.util.Log;
import android.util.TypedValue;

import com.anyun.exam.lib.MyLog;
import com.anyun.exam.lib.util.ByteUtil;
import com.safeluck.aykj.utils.BytesUtils;

/**
 * MyApplication2
 * Created by lzw on 2019/3/18. 13:13:42
 * 邮箱：632393724@qq.com
 * All Rights Saved! Chongqing AnYun Tech co. LTD
 */
public class Utils {
    private static final String TAG = "Utils";
    public static float px2dp(float value){
        return TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,value, Resources.getSystem().getDisplayMetrics());
    }

    /**
     * dp值转像素
     * @param dpValue
     * @return
     */
    public static float dp2Px(int dpValue){
        return TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_PX,dpValue,Resources.getSystem().getDisplayMetrics());
    }

    /**
     * 平台协议生成的校验码
     * @param bytes
     * @return
     */

    public static byte calCheckCode(byte[] bytes){
        byte checkCode =0;
        //　参与运算的两个值，如果两个相应bit位相同，则结果为0，否则为1。
        for (int i = 0; i < bytes.length; i++) {
            checkCode ^= bytes[i];
        }

        return checkCode;
    }

    /**
     * 转义
     * 采用Ox7e表示，若校验码、消息头以及消息体中出现0x7e，则要进行转义处理，转义规则定义如下:
     * 0x7e<——>0x7d后紧跟一个0x02；
     * 0x7d<——>0x7d后紧跟一个0x01。
     * @param datas
     * @return
     */
    public static byte[] transferMeaning(byte[] datas){
        byte [] temp = new byte[datas.length*2];
        int y = 0;
        temp[y++] = 0x7e;
        for (int i = 1; i < datas.length-1; i++) {
            if (datas[i] == 0x7E) {
                temp[y++] = 0x7D;
                temp[y++] = 0x02;
            } else if (datas[i] == 0x7D) {
                temp[y++] = 0x7D;
                temp[y++] = 0x01;
            } else {
                temp[y++] = datas[i];
            }
        }
        temp[y++] = 0x7e;

        byte[] tranferbytes = new byte[y];
        System.arraycopy(temp,0,tranferbytes,0,y);
        Log.i(TAG,"转义过后："+ ByteUtil.byte2hex(tranferbytes));
        return tranferbytes;
    }

    /**
     *接收消息时:转义还原
     * @param datas
     * @return
     */
    public static byte[] parseMsg(byte[] datas){
        byte[] temp = new byte[datas.length];
        int y =0 ;
        for (int i = 0; i < datas.length; i++) {
            if (datas[i]==0x7d && datas[i+1]==0x02 ){
                temp[y++] = 0x7e;
                i++;
                continue;
            }else if (datas[i]==0x7d && datas[i+1]==0x01 ){

                temp[y++] = 0x7d;
                i++;
                continue;
            }else{
                temp[y++] = datas[i];
            }
        }
        return temp;
    }

    public static boolean isDigital(String str) {
        String regx= "^\\d+";
        return str.matches(regx);
    }

    public static void main(String []args){
        String str   = "EB00020000031420010000000400A5";
//        String str   = "7EEB00020000031420010000000400A5007E";
        String str1  = "EB000200000314200100000004030D00";
//        String str1  = "7EEB000200000314200100000004030D00D57E";
        String str2  = "EB000200000314200100000004035000";
        byte [] dtas=BytesUtils.hexStringToBytes(str);
        byte checkcode = calCheckCode(dtas);
        System.out.println(BytesUtils.toHexString(checkcode));
    }
}