<?php
namespace common\components\delivery\platform\fengniao;

use common\components\delivery\helpers\HttpClient;
use Yii;

class Auth
{
    // 固定参数
    const GRANT_TYPE_AUTH_CODE = 'authorization_code';
    const GRANT_TYPE_REFRESH = 'refresh_token';

    // 授权端点 - 正式环境
    const TOKEN_URL_PRODUCTION = 'https://open-anubis.ele.me/anubis-webapi/openapi/token';
    const REFRESH_TOKEN_URL_PRODUCTION = 'https://open-anubis.ele.me/anubis-webapi/openapi/refreshToken';

    // 授权端点 - 沙箱环境
    const TOKEN_URL_SANDBOX = 'https://exam-anubis.ele.me/anubis-webapi/openapi/token';
    const REFRESH_TOKEN_URL_SANDBOX = 'https://exam-anubis.ele.me/anubis-webapi/openapi/refreshToken';

    protected $appId;
    protected $appSecret;
    protected $merchantId;
    protected $isSandbox;

    /**
     * 初始化授权类
     * 根据环境获取配置信息
     */
    public function __construct()
    {
        $isProduction = getenv('YII_ENV') == 'production';

        // 配置（需要替换为真实的appId和appSecret）
        $this->appId = '6587209115185920913';// 3659064244254722812  --  6587209115185920913
        $this->appSecret = '3f935d5f-bf65-467e-a61c-72cfb1d53960'; // dce31e3b-32da-45ed-8353-f2f041b5288f   --   3f935d5f-bf65-467e-a61c-72cfb1d53960
        $this->merchantId = ''; // 需要从配置中获取或外部设置

        // 根据环境设置沙箱标志
        $this->isSandbox = !$isProduction;
    }

    /**
     * 生成授权URL
     * 用户需要通过浏览器访问此URL进行授权
     *
     * @param string $redirectUri 重定向地址（回调地址）
     * @return string 授权URL
     */
    public function generateAuthUrl($redirectUri)
    {
        $params = [
            'appId' => $this->appId,
            'devId' => 133146508, // 蜂鸟开放平台 【开发者中心】->【应用管理】->【发起商户授权】获得的
            'authCallbackUrl' => $redirectUri,
        ];

        // 构建URL
        $queryString = http_build_query($params);
        return 'https://open.ele.me/app-auth?' . $queryString;
    }

    /**
     * 设置商户ID
     *
     * @param string $merchantId 商户ID
     */
    public function setMerchantId($merchantId)
    {
        $this->merchantId = $merchantId;
        return $this;
    }

    /**
     * 生成签名
     * 根据峰鸟开放平台API文档，签名算法采用SHA-256
     *
     * @param array $params 参数数组
     * @return string 签名结果
     */
    protected function generateSignature(array $params)
    {
        // Step 2: 按字典序排序
        ksort($params);

        // Step 3: 拼接成字符串
        $paramStr = '';
        $first = true;
        foreach ($params as $key => $value) {
            if ($first) {
                $paramStr = "{$key}={$value}";
                $first = false;
            } else {
                $paramStr .= "&{$key}={$value}";
            }
        }

        // Step 4: 拼接 appSecret
        $signBefore = $this->appSecret . $paramStr;
        // Step 5: 使用SHA-256加密
        $signature = hash('sha256', $signBefore);

        Yii::info("[FengniaAuth] Sign Before: {$signBefore}, Signature: {$signature}");
        return $signature;
    }

    /**
     * 获取 Token URL
     *
     * @return string
     */
    protected function getTokenUrl()
    {
        return $this->isSandbox ? self::TOKEN_URL_SANDBOX : self::TOKEN_URL_PRODUCTION;
    }

    /**
     * 获取刷新 Token URL
     *
     * @return string
     */
    protected function getRefreshTokenUrl()
    {
        return $this->isSandbox ? self::REFRESH_TOKEN_URL_SANDBOX : self::REFRESH_TOKEN_URL_PRODUCTION;
    }

    /**
     * 获取AccessToken
     * 使用授权码换取令牌
     *
     * 文档：获取token接口
     * 入参：grant_type, code, app_id, merchant_id, timestamp, signature
     * 出参：access_token, refresh_token, expire_in
     *
     * @param string $code 授权码（来自授权回调）
     * @param string $merchantId 商户ID（可选，如果已设置则使用已设置的）
     * @return array 返回格式：['success' => true/false, 'data' => [...], 'error' => '']
     */
    public function getAccessToken($code, $merchantId = null)
    {
        if ($merchantId) {
            $this->setMerchantId($merchantId);
        }

        if (empty($this->merchantId)) {
            return [
                'success' => false,
                'error' => '商户ID未设置',
            ];
        }

        $timestamp = (int)(microtime(true) * 1000); // 毫秒级时间戳
        $params = [
            'grant_type' => self::GRANT_TYPE_AUTH_CODE,
            'code' => $code,
            'app_id' => $this->appId,
            'merchant_id' => $this->merchantId,
            'timestamp' => $timestamp,
        ];

        // 沙箱环境不传code
        if (getenv('YII_ENV') !== 'production') {
            //unset($params['code']);
            //$params['code'] = "";
        }

        // 生成签名
        $signature = $this->generateSignature($params);
        $params['signature'] = $signature;

        $url = $this->getTokenUrl();
        // 发送POST请求
        $response = HttpClient::post($url, $params, [
            'Content-Type' => 'application/json',
        ]);
        Yii::info("[FengniaAuth] GetAccessToken Response: " . json_encode($response));

        return $this->parseResponse($response);
    }

    /**
     * 刷新AccessToken
     * 使用刷新令牌获取新的AccessToken
     *
     * 文档：刷新token接口
     * 入参：grant_type, app_id, merchant_id, timestamp, refresh_token, signature
     * 出参：access_token, refresh_token, expire_in
     *
     * @param string $refreshToken 刷新令牌
     * @param string $merchantId 商户ID（可选，如果已设置则使用已设置的）
     * @return array 返回格式：['success' => true/false, 'data' => [...], 'error' => '']
     */
    public function refreshAccessToken($refreshToken, $merchantId = null)
    {
        if ($merchantId) {
            $this->setMerchantId($merchantId);
        }

        if (empty($this->merchantId)) {
            return [
                'success' => false,
                'error' => '商户ID未设置',
            ];
        }

        $timestamp = (string)(time() * 1000); // 毫秒级时间戳

        $params = [
            'grant_type' => self::GRANT_TYPE_REFRESH,
            'app_id' => $this->appId,
            'merchant_id' => $this->merchantId,
            'timestamp' => $timestamp,
            'refresh_token' => $refreshToken,
        ];

        // 生成签名
        $signature = $this->generateSignature($params);
        $params['signature'] = $signature;

        $url = $this->getRefreshTokenUrl();

        // 发送POST请求
        $response = HttpClient::post($url, $params, [
            'Content-Type' => 'application/json',
        ]);

        Yii::info("[FengniaAuth] RefreshAccessToken Response: " . json_encode($response));

        return $this->parseResponse($response);
    }

    /**
     * 解析API响应
     *
     * 峰鸟开放平台 API 返回格式:
     * {
     *     "sign": "返回值签名",
     *     "code": "200|错误码",
     *     "msg": "错误信息",
     *     "business_data": {
     *         "app_id": "应用id",
     *         "merchant_id": "商户id",
     *         "access_token": "凭证token",
     *         "refresh_token": "刷新token",
     *         "expire_in": "access_token剩余有效时间,单位：秒",
     *         "re_expire_in": "refresh_token剩余有效时间"
     *     }
     * }
     *
     * @param array $response HTTP响应
     * @return array 标准化的响应格式
     */
    protected function parseResponse($response)
    {
        // 检查 code 字段
        if (!isset($response['code'])) {
            return [
                'success' => false,
                'error' => $response['msg'] ?? '响应格式错误，缺少 code 字段',
            ];
        }

        // 如果 code 不等于 '200' 或 200，表示请求失败
        if ((string)$response['code'] !== '200') {
            return [
                'success' => false,
                'error' => $response['msg'] ?? 'API返回异常',
                'code' => $response['code'],
            ];
        }

        // 提取 business_data 字段中的数据
        $businessData = $response['business_data'] ?? [];
        if (is_string($businessData)) {
            $businessData = json_decode($businessData, true);
        }

        // 检查是否包含必需的token信息
        if (empty($businessData['access_token'])) {
            return [
                'success' => false,
                'error' => $response['msg'] ?? '未获取到 access_token',
            ];
        }

        // 成功响应
        return [
            'success' => true,
            'data' => [
                'access_token' => $businessData['access_token'] ?? '',
                'refresh_token' => $businessData['refresh_token'] ?? '',
                'app_id' => $businessData['app_id'] ?? '',
                'merchant_id' => $businessData['merchant_id'] ?? '',
                'expire_in' => $businessData['expire_in'] ?? 0,
                're_expire_in' => $businessData['re_expire_in'] ?? 0,
            ],
        ];
    }

    /**
     * 获取AppId
     *
     * @return string
     */
    public function getAppId()
    {
        return $this->appId;
    }

    /**
     * 获取AppSecret
     *
     * @return string
     */
    public function getAppSecret()
    {
        return $this->appSecret;
    }

    /**
     * 获取商户ID
     *
     * @return string
     */
    public function getMerchantId()
    {
        return $this->merchantId;
    }

    /**
     * 获取是否为沙箱环境
     *
     * @return bool
     */
    public function isSandbox()
    {
        return $this->isSandbox;
    }
}