VinUtil

import org.apache.commons.collections.CollectionUtils;
import org.apache.commons.collections.ListUtils;
import java.util.*;

/**
 * @ClassName VinUtil
 * @Description TODO
 * @Author will
 * @Date 2020/11/19 10:25
 * @Company 天津易和信息科技有限公司
 */
public class VinUtil {
    /**车架号地区代码数组*/
    public static final String areaArray[] = new String[]{"1", "2", "3", "6", "9", "J", "K", "L", "R", "S", "T", "V", "W", "Y", "Z", "G"};

    /**车架号中可能出现的字符数组*/
    public static final String charArray[] = new String[]{"1", "2", "3", "4", "5", "6", "7", "8", "A", "B", "C", "D", "E", "F", "G", "H", "J", "K", "L", "M", "N", "P", "R", "S", "T", "V", "W", "X", "Y"};

    /**车架号校验位计算数组*/
    public static final Object[][] KVMACTHUP = new Object[][]{{'A', 1}, {'B', 2}, {'C', 3}, {'D', 4}, {'E', 5}, {'F', 6},{'G', 7}, {'H', 8}, {'I', 0}, {'J', 1}, {'K', 2}, {'L', 3},{'M', 4}, {'N', 5}, {'O', 0}, {'P', 7}, {'Q', 8}, {'R', 9}, {'S', 2}, {'T', 3}, {'U', 4}, {'V', 5}, {'W', 6}, {'X', 7},{'Y', 8}, {'Z', 9}};
    /**车架号数据加权数组*/
    public static final int[] WEIGHTVALUE = new int[]{8, 7, 6, 5, 4, 3, 2, 10, 0, 9, 8, 7, 6, 5, 4, 3, 2};

    /**
     * 计算车架号的校验位
     * @return
     */
    public String getIsuredCode(String vin) {
        char[] Vin = vin.toCharArray();
        int sum = 0,tempValue = 0;
        char temp;
        for (int i = 0; i < 17; i++) {
            if (Vin[i] >= 'a' && Vin[i] <= 'z') {
                temp = (char) (Vin[i] - 32);
            } else if ((Vin[i] >= 'A') && (Vin[i] <= 'Z')) {
                temp = Vin[i];
            } else if ((Vin[i] >= '0') && (Vin[i] <= '9')) {
                tempValue = Integer.parseInt(String.valueOf(Vin[i]));
                temp = Vin[i];
            } else {
                return "ERROR";
            }
            if ((temp >= 'A') && (temp <= 'Z')) {
                for (int j = 0; j < 26; j++) {
                    if (temp == (char)KVMACTHUP[j][0]) {
                        tempValue = (int) KVMACTHUP[j][1];
                    }
                }
            }
            sum += tempValue * WEIGHTVALUE[i];
        }
        int reslt = sum % 11;
        if (reslt != 10) {
            return String.valueOf(reslt);
        } else {
            return "X";
        }
    }

    /**
     * 判断vin是否正确
     * @param vin
     * @return
     */
    public boolean isVin(String vin) {
        String isuredCode = getIsuredCode(vin);
        if (vin.substring(8, 9).equals(isuredCode)) {
            return true;
        } else {
            return false;
        }
    }

    /**
     * 拼接车架号
     *
     * @param beforeStr
     * @param afterStr
     * @return
     */
    public String spellVin(String beforeStr, String afterStr) {
        StringBuffer vinBuffer = new StringBuffer();
        String preVin = vinBuffer.append(beforeStr).append("X").append(afterStr).toString();
        String isuredCode = getIsuredCode(preVin);
        String vin = new StringBuffer(beforeStr).append(isuredCode).append(afterStr).toString();
        if (isVin(vin)) {
            return vin;
        } else {
            return spellVin(beforeStr, afterStr);
        }
    }

    /**
     * 生成随机前缀
     *
     * @return
     */
    public String prepareBeforeStr() {
        StringBuffer stringBuffer = new StringBuffer();
        stringBuffer.append("VNN");
        for (int i = 0; i < 5; i++) {
            stringBuffer.append(getRandomChar(areaArray));
        }
        return stringBuffer.toString();
    }

    /**
     * 生成随机后缀
     *
     * @return
     */
    public String prepareAfterStr() {
        StringBuffer stringBuffer = new StringBuffer();
        for (int i = 0; i < 3; i++) {
            stringBuffer.append(getRandomChar(charArray));
        }
        stringBuffer.append(prepareNo());
        return stringBuffer.toString();
    }

    /**
     * 生成随机的生产序号
     * @return
     */
    public String prepareNo(){
        Random random = new Random();
        StringBuffer numStrBuff = new StringBuffer();
        for(int i=0;i<5;i++){
            numStrBuff.append(Integer.toHexString(random.nextInt(16)).toUpperCase());
        }
        return numStrBuff.toString();
    }
    /**
     * 返回随机字符
     * @return
     */
    public String getRandomChar(Object array[]) {
        return charArray[(int) (Math.random() * 100 % array.length)];
    }
    /**
     * 获取随机的车架号
     * @return
     */
    public String getRandomVin() {
        String beforeStr = prepareBeforeStr();
        String afterStr = prepareAfterStr();
        String vin = spellVin(beforeStr, afterStr);
        return vin;
    }

    /**
     * 获取对应数量的随机车架号
     * @param num
     * @return
     */
    public List<String> getVinList(int num){
        List<String> vinList = new ArrayList<>();
        for(int i =0;i<num;i++){
            vinList.add(getRandomVin());
        }
        return vinList;
    }
}