package com.codvision.cachecore.utils;

import cn.hutool.core.convert.Convert;
import cn.hutool.extra.spring.SpringUtil;
import com.codvision.cachecore.config.CacheProperties;
import lombok.experimental.UtilityClass;
import org.springframework.data.redis.connection.RedisConnection;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.*;
import org.springframework.data.redis.core.script.DefaultRedisScript;
import org.springframework.data.redis.core.script.RedisScript;

import java.util.*;
import java.util.concurrent.TimeUnit;

/**
 * 缓存工具类
 *
 * @author lingee
 * @date 2023/7/27
 */
@UtilityClass
public class RedisUtil {

    private static final Long SUCCESS = 1L;

    /**
     * 指定缓存失效时间
     *
     * @param key  键
     * @param time 时间(秒)
     */
    public boolean expire(String key, long time) {
        RedisTemplate<Object, Object> redisTemplate = SpringUtil.getBean("redisTemplate");
        Optional.ofNullable(redisTemplate)
                .filter(template -> time > 0)
                .ifPresent(template -> template.expire(key, time, TimeUnit.SECONDS));
        return true;
    }

    /**
     * 指定缓存失效时间
     *
     * @param key      键
     * @param time     时间
     * @param timeUnit 时间单位
     */
    public boolean expire(String key, long time, TimeUnit timeUnit) {
        RedisTemplate<Object, Object> redisTemplate = SpringUtil.getBean("redisTemplate");
        Optional.ofNullable(redisTemplate)
                .filter(template -> time > 0)
                .ifPresent(template -> template.expire(key, time, timeUnit));
        return true;
    }


    /**
     * 根据 key 获取过期时间
     *
     * @param key 键 不能为null
     * @return 时间(秒) 返回0代表为永久有效
     */
    public long getExpire(Object key) {
        RedisTemplate<Object, Object> redisTemplate = SpringUtil.getBean("redisTemplate");
        return Optional.ofNullable(redisTemplate)
                .map(template -> template.getExpire(key, TimeUnit.SECONDS))
                .orElse(-1L);
    }

    /**
     * 查找匹配key
     *
     * @param pattern key
     * @return /
     */
    public List<String> scan(String pattern) {
        RedisTemplate<Object, Object> redisTemplate = SpringUtil.getBean("redisTemplate");
        ScanOptions options = ScanOptions.scanOptions().match(pattern).build();
        return Optional.ofNullable(redisTemplate).map(template -> {
            RedisConnectionFactory factory = template.getConnectionFactory();
            RedisConnection rc = Objects.requireNonNull(factory).getConnection();
            Cursor<byte[]> cursor = rc.scan(options);
            List<String> result = new ArrayList<>();
            while (cursor.hasNext()) {
                result.add(new String(cursor.next()));
            }
            RedisConnectionUtils.releaseConnection(rc, factory);
            return result;
        }).orElse(Collections.emptyList());
    }

    /**
     * 分页查询 key
     *
     * @param patternKey key
     * @param page       页码
     * @param size       每页数目
     * @return /
     */
    public List<String> findKeysForPage(String patternKey, int page, int size) {
        RedisTemplate redisTemplate = SpringUtil.getBean("redisTemplate");
        ScanOptions options = ScanOptions.scanOptions().match(patternKey).build();
        RedisConnectionFactory factory = redisTemplate.getConnectionFactory();
        RedisConnection rc = Objects.requireNonNull(factory).getConnection();
        Cursor<byte[]> cursor = rc.scan(options);
        List<String> result = new ArrayList<>(size);
        int tmpIndex = 0;
        int fromIndex = page * size;
        int toIndex = page * size + size;
        while (cursor.hasNext()) {
            if (tmpIndex >= fromIndex && tmpIndex < toIndex) {
                result.add(new String(cursor.next()));
                tmpIndex++;
                continue;
            }
            // 获取到满足条件的数据后,就可以退出了
            if (tmpIndex >= toIndex) {
                break;
            }
            tmpIndex++;
            cursor.next();
        }
        RedisConnectionUtils.releaseConnection(rc, factory);
        return result;
    }

    /**
     * 判断key是否存在
     *
     * @param key 键
     * @return true 存在 false不存在
     */
    public boolean hasKey(String key) {
        RedisTemplate<Object, Object> redisTemplate = SpringUtil.getBean("redisTemplate");
        return Optional.ofNullable(redisTemplate).map(template -> template.hasKey(key)).orElse(false);
    }

    /**
     * 删除缓存
     *
     * @param keys 可以传一个值 或多个
     */
    public void del(String... keys) {
        RedisTemplate<Object, Object> redisTemplate = SpringUtil.getBean("redisTemplate");
        for (String key : keys) {
            if (hasKey(key)) {
                redisTemplate.delete(key);
            }
        }
    }

    /**
     * 获取锁
     *
     * @param lockKey         锁key
     * @param value           value
     * @param expireTime：单位-秒
     * @return boolean
     */
    public boolean getLock(String lockKey, String value, int expireTime) {
        RedisTemplate<Object, Object> redisTemplate = SpringUtil.getBean("redisTemplate");
        return Optional.ofNullable(redisTemplate)
                .map(template -> template.opsForValue().setIfAbsent(lockKey, value, expireTime, TimeUnit.SECONDS))
                .orElse(false);
    }

    /**
     * 释放锁
     *
     * @param lockKey 锁key
     * @param value   value
     * @return boolean
     */
    public boolean releaseLock(String lockKey, String value) {
        RedisTemplate<Object, Object> redisTemplate = SpringUtil.getBean("redisTemplate");
        String script = "if redis.call('get', KEYS[1]) == ARGV[1] then return redis.call('del', KEYS[1]) else return 0 end";
        RedisScript<Long> redisScript = new DefaultRedisScript<>(script, Long.class);
        return Optional.ofNullable(redisTemplate.execute(redisScript, Collections.singletonList(lockKey), value))
                .map(Convert::toLong)
                .filter(SUCCESS::equals)
                .isPresent();
    }

    // ============================String=============================

    /**
     * 普通缓存获取
     *
     * @param key 键
     * @return 值
     */
    public <T> T get(String key) {
        RedisTemplate<String, T> redisTemplate = SpringUtil.getBean("redisTemplate");
        return redisTemplate.opsForValue().get(key);
    }

    /**
     * 批量获取
     *
     * @param keys
     * @return
     */
    public <T> List<T> multiGet(List<String> keys) {
        RedisTemplate<String, T> redisTemplate = SpringUtil.getBean("redisTemplate");
        return redisTemplate.opsForValue().multiGet(keys);
    }

    /**
     * 普通缓存放入
     *
     * @param key   键
     * @param value 值
     * @return true成功 false失败
     */
    public boolean set(String key, Object value) {
        CacheProperties cacheProperties = SpringUtil.getBean(CacheProperties.class);
        RedisTemplate<Object, Object> redisTemplate = SpringUtil.getBean("redisTemplate");
        Optional.ofNullable(redisTemplate).map(template -> {
            template.opsForValue().set(key, value, cacheProperties.getTimeout(), TimeUnit.SECONDS);
            return true;
        });
        return true;
    }

    /**
     * 普通缓存放入
     *
     * @param key   键
     * @param value 值
     * @return true成功 false失败
     */
    public boolean increment(String key, long value) {
        CacheProperties cacheProperties = SpringUtil.getBean(CacheProperties.class);
        RedisTemplate<Object, Object> redisTemplate = SpringUtil.getBean("redisTemplate");
        Optional.ofNullable(redisTemplate).map(template -> {
            template.opsForValue().increment(key, value);
            return true;
        });
        return true;
    }

    /**
     * 普通缓存放入并设置时间
     *
     * @param key   键
     * @param value 值
     * @param time  时间(秒) time要大于0 如果time小于等于0 将设置无限期
     * @return true成功 false 失败
     */
    public boolean set(String key, Object value, long time) {
        RedisTemplate<Object, Object> redisTemplate = SpringUtil.getBean("redisTemplate");
        return Optional.ofNullable(redisTemplate).map(template -> {
            if (time > 0) {
                template.opsForValue().set(key, value, time, TimeUnit.SECONDS);
            } else {
                template.opsForValue().set(key, value);
            }
            return true;
        }).orElse(false);
    }

    /**
     * 普通缓存放入并设置时间
     *
     * @param key      键
     * @param value    值
     * @param time     时间
     * @param timeUnit 类型
     * @return true成功 false 失败
     */
    public <T> boolean set(String key, T value, long time, TimeUnit timeUnit) {
        RedisTemplate<String, T> redisTemplate = SpringUtil.getBean("redisTemplate");
        Optional.ofNullable(redisTemplate).map(template -> {
            if (time > 0) {
                template.opsForValue().set(key, value, time, timeUnit);
            } else {
                template.opsForValue().set(key, value);
            }
            return true;
        });
        return true;
    }

    // ================================Map=================================

    /**
     * HashGet
     *
     * @param key     键 不能为null
     * @param hashKey 项 不能为null
     * @return 值
     */
    public <HK, HV> HV hget(String key, HK hashKey) {
        RedisTemplate<String, HV> redisTemplate = SpringUtil.getBean("redisTemplate");
        return redisTemplate.<HK, HV>opsForHash().get(key, hashKey);
    }

    /**
     * 获取hashKey对应的所有键值
     *
     * @param key 键
     * @return 对应的多个键值
     */
    public <HK, HV> Map<HK, HV> hmget(String key) {
        RedisTemplate<String, HV> redisTemplate = SpringUtil.getBean("redisTemplate");
        return redisTemplate.<HK, HV>opsForHash().entries(key);
    }

    /**
     * HashSet
     *
     * @param key 键
     * @param map 对应多个键值
     * @return true 成功 false 失败
     */
    public boolean hmset(String key, Map<?, ?> map) {
        RedisTemplate<Object, Object> redisTemplate = SpringUtil.getBean("redisTemplate");
        Optional.ofNullable(redisTemplate).map(template -> {
            template.opsForHash().putAll(key, map);
            return true;
        });
        return true;
    }

    /**
     * HashSet 并设置时间
     *
     * @param key  键
     * @param map  对应多个键值
     * @param time 时间(秒)
     * @return true成功 false失败
     */
    public boolean hmset(String key, Map<?, ?> map, long time) {
        RedisTemplate<Object, Object> redisTemplate = SpringUtil.getBean("redisTemplate");
        Optional.ofNullable(redisTemplate).map(template -> {
            template.opsForHash().putAll(key, map);
            if (time > 0) {
                template.expire(key, time, TimeUnit.SECONDS);
            }
            return true;
        });
        return true;
    }

    /**
     * 向一张hash表中放入数据,如果不存在将创建
     *
     * @param key   键
     * @param item  项
     * @param value 值
     * @return true 成功 false失败
     */
    public boolean hset(String key, Object item, Object value) {
        RedisTemplate<Object, Object> redisTemplate = SpringUtil.getBean("redisTemplate");
        return Optional.ofNullable(redisTemplate).map(template -> {
            template.opsForHash().put(key, item, value);
            return true;
        }).orElse(false);
    }

    /**
     * 向一张hash表中放入数据,如果不存在将创建
     *
     * @param key   键
     * @param item  项
     * @param value 值
     * @param time  时间(秒) 注意:如果已存在的hash表有时间,这里将会替换原有的时间
     * @return true 成功 false失败
     */
    public boolean hset(String key, Object item, Object value, long time) {
        RedisTemplate<Object, Object> redisTemplate = SpringUtil.getBean("redisTemplate");
        return Optional.ofNullable(redisTemplate).map(template -> {
            template.opsForHash().put(key, item, value);
            if (time > 0) {
                template.expire(key, time, TimeUnit.SECONDS);
            }
            return true;
        }).orElse(false);
    }

    /**
     * 删除hash表中的值
     *
     * @param key  键 不能为null
     * @param item 项 可以使多个 不能为null
     */
    public void hdel(String key, Object... item) {
        RedisTemplate redisTemplate = SpringUtil.getBean("redisTemplate");
        redisTemplate.opsForHash().delete(key, item);
    }

    /**
     * 判断hash表中是否有该项的值
     *
     * @param key  键 不能为null
     * @param item 项 不能为null
     * @return true 存在 false不存在
     */
    public boolean hHasKey(String key, String item) {
        RedisTemplate redisTemplate = SpringUtil.getBean("redisTemplate");
        return redisTemplate.opsForHash().hasKey(key, item);
    }

    /**
     * hash递增 如果不存在,就会创建一个 并把新增后的值返回
     *
     * @param key  键
     * @param item 项
     * @param by   要增加几(大于0)
     * @return
     */
    public double hincr(String key, String item, double by) {
        RedisTemplate redisTemplate = SpringUtil.getBean("redisTemplate");
        return redisTemplate.opsForHash().increment(key, item, by);
    }

    /**
     * hash递减
     *
     * @param key  键
     * @param item 项
     * @param by   要减少记(小于0)
     * @return
     */
    public double hdecr(String key, String item, double by) {
        RedisTemplate redisTemplate = SpringUtil.getBean("redisTemplate");
        return redisTemplate.opsForHash().increment(key, item, -by);
    }

    // ============================set=============================

    /**
     * 根据key获取Set中的所有值
     *
     * @param key 键
     * @return
     */
    public <T> Set<T> sGet(String key) {
        RedisTemplate<String, T> redisTemplate = SpringUtil.getBean("redisTemplate");
        return redisTemplate.opsForSet().members(key);
    }

    /**
     * 根据value从一个set中查询,是否存在
     *
     * @param key   键
     * @param value 值
     * @return true 存在 false不存在
     */
    public boolean sHasKey(String key, Object value) {
        RedisTemplate redisTemplate = SpringUtil.getBean("redisTemplate");
        return redisTemplate.opsForSet().isMember(key, value);
    }

    /**
     * 将数据放入set缓存
     *
     * @param key    键
     * @param values 值 可以是多个
     * @return 成功个数
     */
    public long sSet(String key, Object... values) {
        RedisTemplate redisTemplate = SpringUtil.getBean("redisTemplate");
        return redisTemplate.opsForSet().add(key, values);
    }

    /**
     * 将set数据放入缓存
     *
     * @param key    键
     * @param time   时间(秒)
     * @param values 值 可以是多个
     * @return 成功个数
     */
    public long sSetAndTime(String key, long time, Object... values) {
        RedisTemplate redisTemplate = SpringUtil.getBean("redisTemplate");
        Long count = redisTemplate.opsForSet().add(key, values);
        if (time > 0) {
            expire(key, time);
        }
        return count;
    }

    /**
     * 获取set缓存的长度
     *
     * @param key 键
     * @return
     */
    public long sGetSetSize(String key) {
        RedisTemplate redisTemplate = SpringUtil.getBean("redisTemplate");
        return redisTemplate.opsForSet().size(key);
    }

    /**
     * 移除值为value的
     *
     * @param key    键
     * @param values 值 可以是多个
     * @return 移除的个数
     */
    public long setRemove(String key, Object... values) {
        RedisTemplate redisTemplate = SpringUtil.getBean("redisTemplate");
        Long count = redisTemplate.opsForSet().remove(key, values);
        return count;
    }

    /**
     * 获集合key1和集合key2的差集元素
     *
     * @param key 键
     * @return
     */
    public <T> Set<T> sDifference(String key, String otherKey) {
        RedisTemplate<String, T> redisTemplate = SpringUtil.getBean("redisTemplate");
        return redisTemplate.opsForSet().difference(key, otherKey);
    }

    // ===============================list=================================

    /**
     * 获取list缓存的内容
     *
     * @param key   键
     * @param start 开始
     * @param end   结束 0 到 -1代表所有值
     * @return
     */
    public <T> List<T> lGet(String key, long start, long end) {
        RedisTemplate<String, T> redisTemplate = SpringUtil.getBean("redisTemplate");
        return redisTemplate.opsForList().range(key, start, end);
    }

    /**
     * 获取list缓存的长度
     *
     * @param key 键
     * @return
     */
    public long lGetListSize(String key) {
        RedisTemplate redisTemplate = SpringUtil.getBean("redisTemplate");
        return redisTemplate.opsForList().size(key);
    }

    /**
     * 通过索引 获取list中的值
     *
     * @param key   键
     * @param index 索引 index>=0时， 0 表头，1 第二个元素，依次类推；index<0时，-1，表尾，-2倒数第二个元素，依次类推
     * @return
     */
    public Object lGetIndex(String key, long index) {
        RedisTemplate redisTemplate = SpringUtil.getBean("redisTemplate");
        return redisTemplate.opsForList().index(key, index);
    }

    /**
     * 将list放入缓存
     *
     * @param key   键
     * @param value 值
     * @return
     */
    public boolean lSet(String key, Object value) {
        RedisTemplate redisTemplate = SpringUtil.getBean("redisTemplate");
        redisTemplate.opsForList().rightPush(key, value);
        return true;
    }

    /**
     * 将list放入缓存
     *
     * @param key   键
     * @param value 值
     * @param time  时间(秒)
     * @return
     */
    public boolean lSet(String key, Object value, long time) {
        RedisTemplate<Object, Object> redisTemplate = SpringUtil.getBean("redisTemplate");
        redisTemplate.opsForList().rightPush(key, value);
        if (time > 0) {
            Optional.ofNullable(redisTemplate).ifPresent(template -> template.expire(key, time, TimeUnit.SECONDS));
        }
        return true;
    }

    /**
     * 将list放入缓存
     *
     * @param key   键
     * @param value 值
     * @return
     */
    public boolean lSet(String key, List<Object> value) {
        RedisTemplate redisTemplate = SpringUtil.getBean("redisTemplate");
        redisTemplate.opsForList().rightPushAll(key, value);
        return true;
    }

    /**
     * 将list放入缓存
     *
     * @param key   键
     * @param value 值
     * @param time  时间(秒)
     * @return
     */
    public boolean lSet(String key, List<Object> value, long time) {
        RedisTemplate redisTemplate = SpringUtil.getBean("redisTemplate");
        redisTemplate.opsForList().rightPushAll(key, value);
        if (time > 0) {
            expire(key, time);
        }
        return true;
    }

    /**
     * 根据索引修改list中的某条数据
     *
     * @param key   键
     * @param index 索引
     * @param value 值
     * @return /
     */
    public boolean lUpdateIndex(String key, long index, Object value) {
        RedisTemplate redisTemplate = SpringUtil.getBean("redisTemplate");
        redisTemplate.opsForList().set(key, index, value);
        return true;
    }

    /**
     * 移除N个值为value
     *
     * @param key   键
     * @param count 移除多少个
     * @param value 值
     * @return 移除的个数
     */
    public long lRemove(String key, long count, Object value) {
        RedisTemplate redisTemplate = SpringUtil.getBean("redisTemplate");
        return redisTemplate.opsForList().remove(key, count, value);
    }

    /**
     * 将zSet数据放入缓存
     *
     * @param key
     * @param time
     * @param tuples
     * @return
     */
    public long zSetAndTime(String key, long time, Set<ZSetOperations.TypedTuple<Object>> tuples) {
        RedisTemplate redisTemplate = SpringUtil.getBean("redisTemplate");
        Long count = redisTemplate.opsForZSet().add(key, tuples);
        if (time > 0) {
            expire(key, time);
        }
        return count;

    }

    /**
     * Sorted set:有序集合获取
     *
     * @param key
     * @param min
     * @param max
     * @return
     */
    public Set<Object> zRangeByScore(String key, double min, double max) {
        RedisTemplate redisTemplate = SpringUtil.getBean("redisTemplate");
        ZSetOperations<String, Object> zset = redisTemplate.opsForZSet();
        return zset.rangeByScore(key, min, max);

    }

    /**
     * Sorted set:有序集合获取 正序
     *
     * @param key
     * @param start
     * @param end
     * @return
     */
    public Set<Object> zRange(String key, long start, long end) {
        RedisTemplate redisTemplate = SpringUtil.getBean("redisTemplate");
        ZSetOperations<String, Object> zset = redisTemplate.opsForZSet();
        return zset.range(key, start, end);

    }

    /**
     * Sorted set:有序集合获取 倒叙
     *
     * @param key
     * @param start
     * @param end
     * @return
     */
    public Set<Object> zReverseRange(String key, long start, long end) {
        RedisTemplate redisTemplate = SpringUtil.getBean("redisTemplate");
        ZSetOperations<String, Object> zset = redisTemplate.opsForZSet();
        return zset.reverseRange(key, start, end);

    }

    /**
     * 获取zSet缓存的长度
     *
     * @param key 键
     * @return
     */
    public long zGetSetSize(String key) {
        RedisTemplate redisTemplate = SpringUtil.getBean("redisTemplate");
        return redisTemplate.opsForZSet().size(key);
    }

}
