package com.iamberry.rst.utils;

import com.iamberry.rst.core.order.OrderBatch;
import com.iamberry.rst.faces.order.OrderBatchService;
import com.iamberry.wechat.tools.ResponseJson;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

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

/***
 * 用于生成单号
 */
@Component
public class GenerateKeyUtil {

    @Autowired
    private OrderBatchService orderBatchService;

    private static SimpleDateFormat SDF_ORDERID = new SimpleDateFormat("yyyyMMddHHmmss");

    private static SimpleDateFormat SDF_BATCH = new SimpleDateFormat("yyMMddHHmm");

    /*订单交易号前两位，D标识一定为手动增加  */
    private final static String SD_ORDER = "D";

    /*手动添加批次编号*/
    private final static String SD_BATCH = "D";
    /*批量添加批次编号*/
    private final static String SC_BATCH = "C";

    /**
     * 获取交易号-手动添加
     * @return
     */
    public static String getSalesOrderKey(){
        return (SD_ORDER  + SDF_ORDERID.format(new Date()) + "0" + generateRandomNumber(3));
    }



    /**
     * 获取批次号 setSalesBatchId -- 单个添加
     * @return
     */
    public String getSalesBatchIdSD(){
        Integer orderBatchNum = orderBatchService.getOrderBatchNum(new OrderBatch());
        return ("S"+ SD_BATCH + SDF_BATCH.format(new Date()) + String.format("%08d", orderBatchNum));
    }

    /**
     * 获取批次号 setSalesBatchId -- 批量导入
     * @return
     */
    public String getSalesBatchIdSC(){
        Integer orderBatchNum = orderBatchService.getOrderBatchNum(new OrderBatch());
        return ("S"+ SC_BATCH + SDF_BATCH.format(new Date()) + String.format("%08d", orderBatchNum));
    }


    /**
     * 产生4位随机数
     * @return
     */
    protected static long generateRandomNumber(int n) {
        if (n < 1) {
            throw new IllegalArgumentException("随机数位数必须大于0");
        }
        return (long) (Math.random() * 9 * Math.pow(10, n - 1)) + (long) Math.pow(10, n - 1);
    }


}