<?php
/**
 * 认证服务.
 *
 * @author nj <nj@gmail.com>
 * @date   2020-01-22 11:36:11
 */
declare(strict_types=1);

namespace Modules\Api\Services;

use App\Constants\CommonConstant;
use App\Exception\ApiException;
use App\Repositories\Utils\JwtRepository;
use Psr\SimpleCache\CacheInterface;

class AuthService
{
    /**
     * Jwt受众.
     *
     * @var string
     */
    private $jwtAud = 'app-users';

    /**
     * 获取存储用户设备Token的缓存Key.
     * @param string $deviceNo   设备编号
     * @param string $deviceType 设备类型
     * @return string
     */
    public function getUserDeviceCacheKey($deviceNo, $deviceType)
    {
        $cacheKey = 'user_auth_device:'. $deviceNo . '_' . $deviceType;

        return $cacheKey;
    }

    /**
     * 创建单点Jwt.
     * @param string $userId     用户ID(邀请码)
     * @param string $deviceNo   设备编号
     * @param string $deviceType 设备类型
     * @param string $version    版本
     * @param string $fingerHash    指纹
     * @return array
     * @throws \Psr\SimpleCache\InvalidArgumentException
     */
    public function createSingleJwt($userId, $deviceNo, $deviceType, $version, $fingerHash = '')
    {
        $user = [];
        $user['user_id'] = $userId;
        $user['device_no'] = $deviceNo;
        $user['device_type'] = $deviceType;
        $user['version'] = $version;
        $user['finger_hash'] = $fingerHash;
        $jwtRepository = make(JwtRepository::class);
        $tokenInfo = $jwtRepository->createAppJwt($user, $this->jwtAud);
        $token = $tokenInfo['token'];

        $cacheKey = $this->getUserDeviceCacheKey($deviceNo, $deviceType);
        $cache = make(CacheInterface::class);
//        $cacheToken = $cache->has($cacheKey) ? $cache->get($cacheKey) : '';
//        if (!empty($cacheToken)) {
//            $cache->delete($cacheKey);
//        }
        $cache->set($cacheKey, $token, config('jwt.ttl') * 60);

        return $tokenInfo;
    }

    /**
     * 获取头部Token.
     * @return mixed
     */
    public function getHeaderToken()
    {
        return request()->header(CommonConstant::X_TOKEN_NAME, null);
    }

    /**
     * 加密X-TOKEN头部信息.
     * @param  array  $info
     * @return false|string
     */
    public function encodeHeaderTokenInfo(array $info)
    {
        $token = data_get($info, 'token', '');
        $deviceNo = data_get($info, 'device_no', '');
        $deviceType = data_get($info, 'device_type', '');
        $fingerHash = data_get($info, 'finger_hash', '');
        $arrData = [
            'token' => $token,
            'device_no' => $deviceNo,
            'device_type' => $deviceType,
            'finger_hash' => $fingerHash,
        ];

        $handshake = CommonConstant::getHandShake();
        if (!empty($handshake)) {
            $arrMap = CommonConstant::getHandSnakeKey($handshake);
            $data = hand_encrypt($arrData, $arrMap['key']);
        } else {
            $data = json_encode($arrData, JSON_UNESCAPED_UNICODE);
        }

        return $data;
    }

    /**
     * 解密头部X-Token信息.
     * @param string $enStr
     * @return array|mixed
     */
    public function decodeHeaderTokenInfo($enStr)
    {
        $data = [];

        $isValidMg = false;
        if (class_exists('\Modules\Manage\Services\AuthService')) {
            $service = make(\Modules\Manage\Services\AuthService::class);
            // 如果有效后台header,则直接不加密，进行明文通讯.
            $isValidMg = $service->checkValidMgHeaderHandShake();
        }
        // 先拿系统里当前flag.
        $handshake = CommonConstant::getHandShake();
        if (!$isValidMg) {
            if (!empty($handshake)) {
                $inputData = request()->all();
                $inputHandShake = $inputData['handshake'] ?? $handshake;
                $handshake = $inputHandShake;
                $originData = $enStr;
                $arrMap = CommonConstant::getHandSnakeKey($handshake);
                if (!is_string($originData)) {
                    throw new ApiException('数据格式有误3');
                }
                try {
                    $data = json_decode(hand_decrypt($originData, $arrMap['key'], ''), true);
                } catch (\Throwable $exception) {
                    throw new ApiException('数据格式有误4');
                }
            } else {
                $data = [];
                if (!empty($enStr) && is_string($enStr)) {
                    $data = json_decode($enStr, true);
                }
            }
        } else {
            // TODO 为了满足android在postmain里拿到解密的数据，兼容header是加密的情况.
            if (!empty($enStr)) {
                if (substr($enStr, 0, 1) == '{') {
                    $data = json_decode($enStr, true);
                } else {
                    $arrMap = CommonConstant::getHandSnakeKey($handshake);
                    $data = json_decode(hand_decrypt($enStr, $arrMap['key'], ''), true);
                }
            }
        }

        return $data;
    }

    /**
     * 获取Token中的UserId
     * @return string
     */
    public function getUserId()
    {
        $user_id = '';
        $enToken = $this->getHeaderToken();
        $arrTokenInfo = $this->decodeHeaderTokenInfo($enToken);
        $token = strval(data_get($arrTokenInfo, 'token', ''));
        if (!empty($token)) {
            $jwtRepository = make(JwtRepository::class);
            $validateResult = $jwtRepository->validateToken($token, $this->jwtAud);
            if ($validateResult['is_valid']) {
                $user_id = $validateResult['token_obj']->claims()->get('user_id');
            }
        }
        return $user_id; //是用户邀请码，非用户id（安全设计)
    }

    /**
     * 从Token中获取用户信息.
     * @return array ['user_id', 'device_no', 'device_type']
     */
    public function getTokenUserInfo() : array
    {
        $userId = $deviceNo = $deviceType = '';
        $enToken = $this->getHeaderToken();
        $arrTokenInfo = $this->decodeHeaderTokenInfo($enToken);
        $token = strval(data_get($arrTokenInfo, 'token', ''));
        if (!empty($token)) {
            $jwtRepository = make(JwtRepository::class);
            $validateResult = $jwtRepository->validateToken($token, $this->jwtAud);
            if ($validateResult['is_valid']) {
                $userId = $validateResult['token_obj']->claims()->get('user_id');
                $deviceNo = $validateResult['token_obj']->claims()->get('device_no');
                $deviceType = $validateResult['token_obj']->claims()->get('device_type');
            }
        }

        $data = [
            'user_id' => $userId, //是用户邀请码，非用户id（安全设计)
            'device_no' => $deviceNo,
            'device_type' => $deviceType,
        ];

        return $data;
    }
}