<?php

namespace app\common\library;

use app\common\library\token\Driver;
use fast\Random;
use think\App;
use think\Config;
use think\Log;

/**
 * Token操作类
 */
class Token
{
    /**
     * @var array Token的实例
     */
    public static array $instance = [];

    /**
     * @var Driver 操作句柄
     */
    public static $handler;

    /**
     * 连接Token驱动
     * @access public
     * @param array $options 配置数组
     * @param bool|string $name Token连接标识 true 强制重新连接
     * @return Driver
     */
    public static function connect(array $options = [], $name = false): Driver
    {
        $type = !empty($options['type']) ? $options['type'] : 'File';

        if (false === $name) {
            $name = md5(serialize($options));
        }

        if (true === $name || !isset(self::$instance[$name])) {
            $class = false === strpos($type, '\\') ?
                '\\app\\common\\library\\token\\driver\\' . ucwords($type) :
                $type;

            // 记录初始化信息
            App::$debug && Log::record('[ TOKEN ] INIT ' . $type, 'info');

            if (true === $name) {
                return new $class($options);
            }

            self::$instance[$name] = new $class($options);
        }

        return self::$instance[$name];
    }

    /**
     * 自动初始化Token
     * @access public
     * @param array $options 配置数组
     * @return Driver
     */
    public static function init(array $options = []): Driver
    {
        if (is_null(self::$handler)) {
            if (empty($options) && 'complex' == Config::get('token.type')) {
                $default = Config::get('token.default');
                // 获取默认Token配置，并连接
                $options = Config::get('token.' . $default['type']) ?: $default;
            } elseif (empty($options)) {
                $options = Config::get('token');
            }

            self::$handler = self::connect($options);
        }

        return self::$handler;
    }

    /**
     * 写入Token
     * @access public
     * @param int $userID 用户ID
     * @param string $address 凭证
     * @return bool
     */
    public static function marshal(int $userID): bool
    {
        // 最近有生成时直接返回
        $tokenArr = self::get($userID);
        if (!empty($tokenArr) &&  isset($tokenArr['create_time']) && $tokenArr['create_time'] + Config::get('token.reuse_duration') > time()) {
            return true;
        }
        // 不存在或超过一定时间则重新生成
        $tokenData["user_id"]     = $userID;
        $tokenData["token"]       = Random::uuid(); // 使用随机字符串
        $tokenData["create_time"] = time();
        return self::init()->set($userID, json_encode($tokenData, JSON_UNESCAPED_UNICODE));
    }

    /**
     * 解码已加密的Token信息
     * @param string $token
     * @return array
     */
    public static function unmarshal(string $token): array
    {
        $decode   = json_decode(base64_decode($token), true);
        $tokenArr = [];
        if (!empty($decode) && !empty($decode["user_id"]) && is_int($decode["user_id"]) && !empty($decode["token"]) && is_string($decode["token"])) {
            $tokenArr["user_id"] = $decode["user_id"];
            $tokenArr["token"]   = $decode["token"];
        }
        return $tokenArr;
    }

    /**
     * 判断Token是否可用
     * @param int $userID 会员ID
     * @param string $token Token标识
     * @return bool
     */
    public static function check(int $userID, string $token): bool
    {
        return self::init()->check($userID, $token);
    }

    /**
     * 读取Token
     * @access public
     * @param int $userID 用户ID
     * @return array
     */
    public static function get(int $userID): array
    {
        return self::init()->get($userID);
    }

    /**
     * 获取加密后的Token
     * @access public
     * @param int $userID 用户ID
     * @return array
     */
    public static function getEncryptedToken(int $userID): string
    {
        return self::init()->getEncryptedToken($userID);
    }

    /**
     * 删除Token
     * @param int $userID 用户ID
     * @return bool
     */
    public static function delete(int $userID): bool
    {
        return self::init()->delete($userID);
    }

}