package com.panzhihua.common.utlis;

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

public class OrderNoUtils {
    private static int sn = 0;

    // 防止创建类的实例
    private OrderNoUtils() {
    }

    public static String NextOrderNo(Long userId) {
        if (sn == 999)
            sn = 0;
        else
            sn++;
        DateFormat df = new SimpleDateFormat("MMddHHmmss");
        return df.format(new Date()) + padRight(String.valueOf(userId), 5, '0') + padRight(String.valueOf(sn), 3, '0')
                + getRandomNumber();
    }

    public static String NextOrderNoFlower(Long userId) {
        DateFormat df = new SimpleDateFormat("MMddHHmmss");
        return df.format(new Date()) + padRight(String.valueOf(userId), 3, '0')
                + getRandomNumber();
    }

    public static String nextDeliveryNo() {
        if (sn == 999)
            sn = 0;
        else
            sn++;
        DateFormat df = new SimpleDateFormat("MMddHHmmss");
        return "PS" + df.format(new Date()) + padRight(String.valueOf(sn), 3, '0')
                + getRandomNumber();
    }

    public static String padLeft(String src, int len, char ch) {
        int diff = len - src.length();
        if (diff <= 0) {
            return src;
        }

        char[] charr = new char[len];
        System.arraycopy(src.toCharArray(), 0, charr, 0, src.length());
        for (int i = src.length(); i < len; i++) {
            charr[i] = ch;
        }
        return new String(charr);
    }

    public static String padRight(String src, int len, char ch) {
        int diff = len - src.length();
        if (diff <= 0) {
            return src;
        }

        char[] charr = new char[len];
        System.arraycopy(src.toCharArray(), 0, charr, diff, src.length());
        for (int i = 0; i < diff; i++) {
            charr[i] = ch;
        }
        return new String(charr);
    }

    /**
     * 获取三位随机数
     *
     * @return 三位随机数
     */
    private static String getRandomNumber() {
        return String.valueOf(new Double((Math.random() * 9 + 1) * (Math.pow(10, 3 - 1))).intValue());
    }
}