package com.ltkj.common.utils;

import cn.hutool.core.util.StrUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Component;

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

/**
 * @Company: 西安路泰科技有限公司
 * @Author: zhaowenxuan
 * @Date: 2024/10/10 14:55
 */
@Component
public class IdUtils {

    private static final String LIS_LAST_ID_KEY = "id:generate:lis:id";
    private static final String LIS_LAST_ID_INCR_KEY = "id:generate:lis:id:incr";
    private static final String LIS_CURRENT_DATE_KEY = "id:generate:lis:currentDate";

//    private static final UidGenerator uidGenerator = new DefaultUidGenerator();  // 使用默认的Snowflake生成器

    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    public synchronized String generateLisID(String prefix) {
        String currentDate = new SimpleDateFormat("yyyyMMdd").format(new Date());
        String storedDate = stringRedisTemplate.opsForValue().get(LIS_CURRENT_DATE_KEY);
        String lastIdStr = stringRedisTemplate.opsForValue().get(LIS_LAST_ID_KEY);
        int lastId;
        if (storedDate == null || !storedDate.equals(currentDate)) {
            lastId = 1;
            stringRedisTemplate.opsForValue().set(LIS_LAST_ID_KEY, String.valueOf(lastId));
            stringRedisTemplate.opsForValue().set(LIS_CURRENT_DATE_KEY, currentDate);
        } else {
            lastId = Integer.parseInt(lastIdStr) + 1;
            stringRedisTemplate.opsForValue().set(LIS_LAST_ID_KEY, String.valueOf(lastId));
        }
        String yyMMdd = currentDate.substring(2);
        return String.format(prefix+"%s%05d", yyMMdd, lastId);
    }

    /**
     * 生成无限递增条码号
     * @param prefix
     * @return
     */
    public synchronized String generateLisNextId(String prefix){
        String lastIdStr = stringRedisTemplate.opsForValue().get(LIS_LAST_ID_INCR_KEY);
        int current;
        if (StrUtil.isBlank(lastIdStr)) {
            current = 1;
        }else {
            current = Integer.parseInt(lastIdStr);
        }
        int numberLength = String.valueOf(99999).length();
        String result = prefix + String.format("%0" + numberLength + "d", current);
        current++;
        stringRedisTemplate.opsForValue().set(LIS_LAST_ID_INCR_KEY,String.valueOf(current));
        return result;
    }


    //生成体检号用
    private static long lastTimestamp = -1;
    private static final Random random = new Random();

    public static synchronized String getTjNumber() {
        long timestamp = System.currentTimeMillis();  // 获取当前时间戳（毫秒）

        // 如果时间戳和上次生成的时间戳相同，生成一个新的随机数
        if (timestamp == lastTimestamp) {
            return String.format("%09d", (timestamp % 1000000000) + random.nextInt(900) + 100);
        } else {
            lastTimestamp = timestamp;  // 更新最后生成时间戳
            return String.format("%09d", (timestamp % 1000000000) + random.nextInt(900) + 100);
        }
    }


//    使用分布式ID生成器（如Snowflake）
    public static String generateExamNumber() {
//        long id = uidGenerator.getUID();  // 获取生成的唯一ID
//        return String.format("%09d", Math.abs(id) % 1000000000);  // 格式化为9位
        return null;
    }

}