<?php

namespace App\Utils\Encrypt\Token\Driver;


use App\Utils\Encrypt\Token\Driver;
use Hyperf\Config\Annotation\Value;
use Hyperf\Context\ApplicationContext;

/**
 * Token操作类
 */
class Redis extends Driver
{
    /**
     * 注解
     * 设置redis前缀与框架保持一致
     *
     * @var string
     */
    #[Value("token.default")]
    protected array $config = [];

    protected array $options = [
        'expire'      => 2592000,
        'userprefix'  => 'up:',
        'tokenprefix' => 'tp:',
    ];

    /**
     * 构造函数
     * @throws \Psr\Container\ContainerExceptionInterface
     * @throws \Psr\Container\NotFoundExceptionInterface
     */
    public function __construct()
    {
        $container   = ApplicationContext::getContainer();
        $this->handler = $container->get(\Redis::class);
    }

    /**
     * 获取加密后的Token
     * @param string $token Token标识
     * @return string
     */
    protected function getEncryptedToken(string $token): string
    {
        $config = $this->config;
        return $this->options['tokenprefix'] . hash_hmac($config['hash_algo'], $token, $config['key']);
    }

    /**
     * 获取会员的key
     * @param $user_id
     * @return string
     */
    protected function getUserKey($user_id): string
    {
        return $this->options['userprefix'] . $user_id;
    }

    /**
     * 存储Token
     * @param string $token   Token
     * @param int $user_id 会员ID
     * @param int $expire  过期时长,0表示无限,单位秒
     * @return bool
     */
    public function set(string $token, int $user_id, int $expire = 0): bool
    {
        if (is_null($expire)) {
            $expire = $this->options['expire'];
        }
        if ($expire instanceof \DateTime) {
            $expire = $expire->getTimestamp() - time();
        }
        $key = $this->getEncryptedToken($token);
        if ($expire) {
            $result = $this->handler->setex($key, $expire, $user_id);
        } else {
            $result = $this->handler->set($key, $user_id);
        }
        //写入会员关联的token
        $this->handler->sAdd($this->getUserKey($user_id), $key);
        return $result;
    }

    /**
     * 获取Token内的信息
     * @param string $token
     * @return  array
     */
    public function get(string $token): array
    {
        $key = $this->getEncryptedToken($token);
        $value = $this->handler->get($key);
        if (is_null($value) || false === $value) {
            return [];
        }
        //获取有效期
        $expire = $this->handler->ttl($key);
        $expire = $expire < 0 ? 365 * 86400 : $expire;
        $expireTime = time() + $expire;
        //解决使用redis方式储存token时api接口Token刷新与检测因expires_in拼写错误报错的BUG
        return ['token' => $token, 'user_id' => $value, 'expiretime' => $expireTime, 'expires_in' => $expire];
    }

    /**
     * 判断Token是否可用
     * @param string $token   Token
     * @param int $user_id 会员ID
     * @return  boolean
     */
    public function check(string $token, int $user_id): bool
    {
        $data = self::get($token);
        return $data && $data['user_id'] == $user_id;
    }

    /**
     * 删除Token
     * @param string $token
     * @return  boolean
     */
    public function delete(string $token): bool
    {
        $data = $this->get($token);
        if ($data) {
            $key = $this->getEncryptedToken($token);
            $user_id = $data['user_id'];
            $this->handler->del($key);
            $this->handler->sRem($this->getUserKey($user_id), $key);
        }
        return true;

    }

    /**
     * 删除指定用户的所有Token
     * @param int $user_id
     * @return  boolean
     */
    public function clear(int $user_id): bool
    {
        $keys = $this->handler->sMembers($this->getUserKey($user_id));
        $this->handler->del($this->getUserKey($user_id));
        $this->handler->del($keys);
        return true;
    }

}