<?php
// +----------------------------------------------------------------------
// | Bwsaas
// +----------------------------------------------------------------------
// | Copyright (c) 2015~2020 http://www.buwangyun.com All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Gitee ( https://gitee.com/buwangyun/bwsaas )
// +----------------------------------------------------------------------
// | Author: buwangyun <hnlg666@163.com>
// +----------------------------------------------------------------------
// | Date: 2020-9-28 10:55:00
// +----------------------------------------------------------------------

namespace buwang\service;

use think\facade\Cache as CacheStatic;

/**
 *  缓存类(file缓存 、redis缓存)
 * Class CacheService
 * @package buwang\service
 */
class CacheService
{
    /**
     * 标签名
     * @var string
     */
    protected static $globalCacheName = 'bw_cache_65018';

    /**
     * 过期时间
     * @var int
     */
    protected static $expire;

    /**
     * 获取缓存过期时间
     * @param int|null $expire
     * @return int
     */
    protected static function getExpire(int $expire = null): int
    {
        if (self::$expire) {
            return (int)self::$expire;
        }
        $expire = !is_null($expire) ? $expire : config('site.cache_time');
        if (!is_int($expire))
            $expire = (int)$expire;
        return self::$expire = $expire;
    }

    /**
     * 写入file缓存
     * @param string $name 缓存名称
     * @param mixed $value 缓存值
     * @param int $expire 缓存时间，为0读取系统缓存时间
     * @return bool
     */
    public static function set(string $name, $value, int $expire = null): bool
    {
        return self::handler()->set($name, $value, self::getExpire($expire));
    }

    /**
     * 如果不存在则写入file缓存
     * @param string $name
     * @param bool $default
     * @return mixed
     */
    public static function get(string $name, $default = false, int $expire = null)
    {
        return self::handler()->remember($name, $default, self::getExpire($expire));
    }

    /**
     * 删除file缓存
     * @param string $name
     * @return bool
     * @throws \Psr\SimpleCache\InvalidArgumentException
     */
    public static function delete(string $name)
    {
        return CacheStatic::delete($name);
    }

    /**
     * 缓存句柄
     *
     * @return \think\cache\TagSet|CacheStatic
     */
    public static function handler(?string $cacheName = null)
    {
        return CacheStatic::tag($cacheName ?: self::$globalCacheName);
    }

    /**
     * 清空缓存池
     * @return bool
     */
    public static function clear()
    {
        return self::handler()->clear();
    }

    /**
     * Redis缓存句柄
     *
     * @return \think\cache\TagSet|CacheStatic
     */
    public static function redisHandler(string $type = null)
    {
        if ($type) {
            return CacheStatic::store('redis')->tag($type);
        } else {
            return CacheStatic::store('redis');
        }
    }

    /**
     * 放入令牌桶
     * @param string $key
     * @param array $value
     * @param string $type
     * @return bool
     */
    public static function setTokenCache($key, $value, $expire = null, string $type = 'user')
    {
        $key = is_string($key) ? $key : (string)$key;
        try {
            $redisCahce = self::redisHandler($type);
            return $redisCahce->set($key, $value, $expire);
        } catch (\Throwable $e) {
            return false;
        }
    }

    /**
     * 获取token令牌桶
     * @param string $key
     * @return mixed|null
     */
    public static function getTokenCache($key)
    {
        $key = is_string($key) ? $key : (string)$key;
        try {
            return self::redisHandler()->get($key, null);
        } catch (\Throwable $e) {
            return null;
        }
    }

    /**
     * 清除令牌桶
     * @param string $key
     * @return bool
     */
    public static function clearToken($key)
    {
        $key = is_string($key) ? $key : (string)$key;
        try {
            return self::redisHandler()->delete($key);
        } catch (\Throwable $e) {
            return false;
        }
    }

    /**
     * 清除所有令牌桶
     * @param string $type
     * @return bool
     */
    public static function clearTokenAll($type = 'user')
    {
        $key = is_string($type) ? $type : (string)$type;
        try {
            return self::redisHandler($type)->clear();
        } catch (\Throwable $e) {
            return false;
        }
    }

    /**
     * 查看令牌是否存在
     * @param string $key
     * @return bool
     */
    public static function hasToken($key)
    {
        $key = is_string($key) ? $key : (string)$key;
        try {
            return self::redisHandler()->has($key);
        } catch (\Throwable $e) {
            return false;
        }
    }
}