package cn.com.lzt.tools;

import java.text.Format;
import java.text.SimpleDateFormat;
import java.util.Date;

import org.jeecgframework.core.common.exception.BusinessException;
import org.jeecgframework.core.util.DateUtils;
import org.jeecgframework.core.util.StringUtil;
/**
 * @Description: 订单号生成工具类
 * @author zhijia.wang
 * @date 2017-6-9下午2:24:40
 */
public class OrderNumTools {
	

	private static Format sdf = new SimpleDateFormat("yyMMddHHmmssSSS");
	//流水号位数
	private static int numLength = 3;
	public static String generate18OrderNum() {
		String orderNum = "";
		Date now = new Date();
		String nowStr = sdf.format(now);
		String ranNumStr = String.valueOf(SaltUtil.randon3Num());
		orderNum = nowStr + ranNumStr;
		return orderNum;
	}

	public static void main(String[] args) {
		String orderNum = OrderNumTools.generate18OrderNum();
		System.out.println("orderNum:" + orderNum);
	}
	
	/**
 	 * prefix:前缀固定字母，长度必须= 2
 	 * 
 	 * */
 	public static String generateNextBillCode(String localMaxCode,String prefix) {
		String newcode = "";
		String date = DateUtils.formatDate(new Date(), "yyyyMMdd");
		if (localMaxCode == null || localMaxCode =="") {
			String num = getStrNum(1);
			newcode = prefix+date + num;
		} else {
			String localCodeDate = localMaxCode.substring(2,localMaxCode.length()-numLength);
			// 每一天都会从1开始，重新计算流水号
			if (date.compareTo(localCodeDate) > 0){
				String num = getStrNum(1);
				newcode = prefix+date + num;
			}else {
				String after_code = localMaxCode.substring(localMaxCode.length() - 1 - numLength,localMaxCode.length());
				Integer after_code_num = Integer.parseInt(after_code.substring(2));
	
				String nextNum = "";
				if (after_code_num == getMaxNumByLength(numLength)) {
					throw new BusinessException("超出最大单据编号，请联系管理员。"); //= getNextStrNum(0)
				} else {
					nextNum = getNextStrNum(after_code_num);
				}
				newcode = prefix + date + nextNum;
			}
		}
		return newcode;

	}
	/**
	 * 将数字前面位数补零
	 * 
	 * @param num
	 * @return
	 */
	private  static String getNextStrNum(int num) {
		return getStrNum(getNextNum(num));
	}

	/**
	 * 将数字前面位数补零
	 * 
	 * @param num
	 * @return
	 */
	private  static String getStrNum(int num) {
		String s = String.format("%0" + numLength + "d", num);
		return s;
	}

	/**
	 * 递增获取下个数字
	 * 
	 * @param num
	 * @return
	 */
	private static int getNextNum(int num) {
		num++;
		return num;
	}

	/**
	 * 递增获取下个字母
	 * 
	 * @param num
	 * @return
	 */
	private static  char getNextZiMu(char zimu) {
		if (zimu == 'Z') {
			return 'A';
		}
		zimu++;
		return zimu;
	}
	/**
	 * 根据数字位数获取最大值
	 * @param length
	 * @return
	 */
	private static  int getMaxNumByLength(int length){
		if(length==0){
			return 0;
		}
		String max_num = "";
		for (int i=0;i<length;i++){
			max_num = max_num + "9";
		}
		return Integer.parseInt(max_num);
	}
	public  static String[] cutYouBianCode(String code){
		if(code==null||StringUtil.isEmpty(code)){
			return null;
		}else{
			//获取标准长度为numLength+1,截取的数量为code.length/numLength+1
			int c = code.length()/(numLength+1);
			String[] cutcode = new String[c];
			for(int i =0 ; i <c;i++){
				cutcode[i] = code.substring(0,(i+1)*(numLength+1));
			}
			return cutcode;
		}
		
	}
	

}