package com.se.simu.helper;

import com.github.benmanes.caffeine.cache.Cache;
import com.github.benmanes.caffeine.cache.Caffeine;
import lombok.extern.slf4j.Slf4j;

import java.math.BigInteger;
import java.security.MessageDigest;
import java.util.List;
import java.util.concurrent.TimeUnit;

/**
 * Caffeine帮助类
 *
 * @author WWW
 * @date 2024-11-05
 */
@Slf4j
public class CaffeineHelper {
    private static Cache<String, Object> cache;

    public static void init(Integer cacheTime) {
        cache = Caffeine.newBuilder()
                .initialCapacity(16)
                .maximumSize(4096)
                .expireAfterWrite(cacheTime, TimeUnit.MINUTES)
                .build();
    }

    public static Object get(String key) {
        return cache.getIfPresent(key);
    }

    public static void put(String key, Object obj) {
        cache.put(key, obj);
    }

    public static void remove(String key) {
        cache.invalidate(key);
    }

    public static void clear() {
        cache.invalidateAll();
    }

    public static <T> List<T> getListByKey(String key) {
        Object obj = get(key);
        if (obj instanceof List<?>) {
            return (List<T>) obj;
        }

        return null;
    }

    public static <T> void putListByKey(String key, List<T> list) {
        if (null != list && list.size() > 0) {
            put(key, list);
        }
    }

    public static String getMd5(String str) {
        if (StringHelper.isEmpty(str)) {
            return null;
        }

        try {
            MessageDigest md5 = MessageDigest.getInstance("MD5");
            md5.update(str.getBytes());
            byte[] byteArray = md5.digest();

            BigInteger bigInt = new BigInteger(1, byteArray);

            // 参数16表示16进制
            String result = bigInt.toString(16);

            // 不足32位高位补零
            while (result.length() < 32) {
                result = "0" + result;
            }

            return result;
        } catch (Exception e) {
            return null;
        }
    }
}