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

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

class Huolala
{
    protected $baseUrl;
    protected $appSecret;
    protected $appKey;
    protected $accessToken;
    protected $apiVersion = '1.0';
    protected $isSandbox;

    /**
     * @var string 订单消息回调地址
     */
    protected $notifyUrl;

    const CITY_VEHICLE_CACHE_TTL = 86400; // 1 day
    const CITY_VEHICLE_CACHE_KEY_PATTERN = 'huolala-city-vehicle:%d_%s';

    public function __construct($accessToken='')
    {
        if (getenv('YII_ENV') == 'production') {
            $cfg = [
                'base_url' => 'https://openapi.huolala.cn/v1',
                'app_key' => 'gBhmCdWtX7hi7qnljduk0yK21XgQg8w3',
                'secret' => 'bARxI68FFHpEXAcCQ23fxVQyxtJ9RONU',
                'notify_url' => Yii::$app->params['ghsHost'].'/delivery/huolala-callback',
            ];
            $this->isSandbox = false;
        } else {
            $cfg = [
                'base_url' => 'https://openapi-pre.huolala.cn/v1',
                'app_key' => '8S2uZQrWwM1mkG2Cj576PsMiNIe25UNT',
                'secret' => 'olzor07UgmUWaagahNGQAKQKXRtvhK8j',
                'notify_url' => Yii::$app->params['ghsHost'].'/delivery/huolala-callback',
            ];
            $this->isSandbox = true;
        }
        $this->baseUrl = $cfg['base_url'];
        $this->appSecret = $cfg['secret'];
        $this->appKey = $cfg['app_key'];
        $this->accessToken = $accessToken;
        $this->notifyUrl = $cfg['notify_url'];
    }

    /**
     * 获取城市可选车型信息
     *
     * 通过此接口可获取城市可选车型信息，包括车型详情、计价规则、车型附加要求和额外需求等
     *
     * @param int $cityId 城市ID
     * @param bool $forceRefresh 是否强制刷新缓存
     * @return array|null 包含城市车型信息的响应数据
     */
    public function getCityVehicleList($cityId, $forceRefresh = false)
    {
        // 参数验证
        if (empty($cityId) || !is_numeric($cityId)) {
            return null;
        }
        $cityId = (int)$cityId;
        $env = $this->isSandbox ? 'dev' : 'production'; // 避免切环境后，使用了不同环境的缓存数据

        $cacheKey = sprintf(self::CITY_VEHICLE_CACHE_KEY_PATTERN, $cityId, $env);
        $redis = Yii::$app->has('redis') ? Yii::$app->redis : null;

        if ($redis !== null) {
            if ($forceRefresh) {
                $redis->executeCommand('DEL', [$cacheKey]);
            } else {
                $cached = $redis->executeCommand('GET', [$cacheKey]);
                if ($cached !== false && $cached !== null) {
                    $decoded = json_decode($cached, true);
                    if (is_array($decoded)) {
                        return $decoded;
                    }
                }
            }
        }

        // 构建请求参数，发送请求
        $payload = $this->buildRequestPayload('u-city-info', ['city_id' => $cityId]);
        $resp = HttpClient::post($this->baseUrl, $payload);

        // 处理响应
        if (isset($resp['ret']) && $resp['ret'] == 0 && isset($resp['data'])) {
            $data = $resp['data'];

            // 提取车型列表
            $vehicleList = [];
            if (!empty($data['vehicle_list']) && is_array($data['vehicle_list'])) {
                foreach ($data['vehicle_list'] as $vehicle) {
                    // 处理超里程价格分段
                    $exceedSegmentPrice = [];
                    if (!empty($vehicle['price_text_item']['exceed_segment_price'])
                        && is_array($vehicle['price_text_item']['exceed_segment_price'])) {
                        foreach ($vehicle['price_text_item']['exceed_segment_price'] as $segment) {
                            $exceedSegmentPrice[] = [
                                'start_exdistancekm' => $segment['start_exdistancekm'] ?? 0,
                                'end_exdistancekm' => $segment['end_exdistancekm'] ?? 0,
                                'price_extra_fen' => $segment['price_extra_fen'] ?? 0,
                            ];
                        }
                    }

                    // 处理车型附加要求
                    $vehicleStdItem = [];
                    if (!empty($vehicle['vehicle_std_item']) && is_array($vehicle['vehicle_std_item'])) {
                        foreach ($vehicle['vehicle_std_item'] as $std) {
                            $vehicleStdItem[] = [
                                'name' => $std['name'] ?? '',
                                'desc' => $std['desc'] ?? '',
                                'price_fen' => $std['price_fen'] ?? 0,
                            ];
                        }
                    }

                    $vehicleList[] = [
                        'order_vehicle_id' => $vehicle['order_vehicle_id'] ?? 0,
                        'vehicle_name' => $vehicle['vehicle_name'] ?? '',
                        'img_url_high_light' => $vehicle['img_url_high_light'] ?? '',
                        'vehicle_volume' => $vehicle['vehicle_volume'] ?? '',
                        'vehicle_weight' => $vehicle['vehicle_weight'] ?? '',
                        'vehicle_size' => $vehicle['vehicle_size'] ?? '',
                        'standard_order_vehicle_id' => $vehicle['standard_order_vehicle_id'] ?? 0,
                        'text_desc' => $vehicle['text_desc'] ?? '',
                        'vehicle_attr' => $vehicle['vehicle_attr'] ?? 0,
                        'price_text_item' => [
                            'base_distancekm' => $vehicle['price_text_item']['base_distancekm'] ?? 0,
                            'base_price_fen' => $vehicle['price_text_item']['base_price_fen'] ?? 0,
                            'exceed_segment_price' => $exceedSegmentPrice,
                        ],
                        'vehicle_std_item' => $vehicleStdItem,
                    ];
                }
            }

            // 处理城市额外需求列表
            $specReqItem = [];
            if (!empty($data['spec_req_item']) && is_array($data['spec_req_item'])) {
                foreach ($data['spec_req_item'] as $specReq) {
                    $specReqItem[] = [
                        'type' => (int)($specReq['type'] ?? 0),
                        'name' => $specReq['name'] ?? '',
                        'desc' => $specReq['desc'] ?? '',
                        'price_type' => (int)($specReq['price_type'] ?? 0),
                        'price_value_fen' => (int)($specReq['price_value_fen'] ?? 0),
                    ];
                }
            }

            $result = [
                'city_id' => $data['city_id'],
                'name' => $data['name'],
                'name_en' => $data['name_en'],
                'city_info_revision' => $data['city_info_revision'],
                'vehicle_list' => $vehicleList,
                'spec_req_item' => $specReqItem,
            ];

            if ($redis !== null) {
                $redis->executeCommand('SETEX', [
                    $cacheKey,
                    self::CITY_VEHICLE_CACHE_TTL,
                    json_encode($result, JSON_UNESCAPED_UNICODE)
                ]);
            }

            return $result;
        }

        return null;
    }

    /**
     * 获取可选取消原因
     *
     * 通过此接口可获取可选择的取消原因，包括主原因和子原因
     *
     * @param array $data 业务参数（当前接口无必需参数，可传空数组）
     * @return array|null 包含取消原因列表的响应数据
     */
    public function getCancelReasonList($data)
    {
        // 构建请求参数（无业务数据）
        $payload = $this->buildRequestPayload('u-order-cancelReason', []);

        // 发送请求
        $resp = HttpClient::post($this->baseUrl, $payload);

        // 处理响应
        if (isset($resp['ret']) && $resp['ret'] == 0 && isset($resp['data'])) {
            $respData = $resp['data'];

            // 提取取消原因列表
            $reasonList = [];
            if (!empty($respData['reason']) && is_array($respData['reason'])) {
                foreach ($respData['reason'] as $reason) {
                    if (!empty($reason['sub_reason']) && is_array($reason['sub_reason'])) {
                        foreach ($reason['sub_reason'] as $subReason) {
                            $reasonList[] = [
                                'order_cancel_code' => (int)($subReason['id'] ?? 0),
                                'order_cancel_desc' => $subReason['name'] ?? '',
                            ];
                        }
                    }
                }
            }

            return [
                'code' => 0,
                'data' => [
                    'reasonList' => $reasonList,
                ]
            ];
        }

        return [
            'code' => $resp['ret'] ?? -1,
            'msg' => $resp['msg'] ?? 'Unknown error',
            'data' => null
        ];
    }

    /**
     * 构建API请求参数
     * 
     * 根据货拉拉API规范构建完整的请求参数，包括签名
     * 
     * @param string $apiMethod API方法名
     * @param array $apiData 业务参数
     * @param string|null $accessToken 用户授权令牌（可选）
     * @return array 完整的请求参数
     */
    protected function buildRequestPayload($apiMethod, $apiData = [], $accessToken = null)
    {
        // 生成随机数（nonce_str）
        $nonceStr = $this->generateNonceStr();

        // 构建系统级参数
        $payload = [
            'api_method' => $apiMethod,
            'api_version' => $this->apiVersion,
            'app_key' => $this->appKey,
            'timestamp' => time(),
            'nonce_str' => $nonceStr,
        ];

        // 如果提供了访问令牌，加入参数
        if (!empty($accessToken)) {
            $payload['access_token'] = $accessToken;
        }

        // 业务数据作为 JSON 字符串
        // 注意：如果不加 JSON_UNESCAPED_SLASHES，PHP 会把 / 编码成 \/
        //      而很多第三方（包括货拉拉）在服务端是按未转义的 / 参与签名的，
        //      一旦字段里有 URL（如 notify_url），双方签名串就会不一致。
        //      因此这里显式关闭斜杠转义，保证本地和对端采用一致的 JSON 形式参与签名。
        $payload['api_data'] = json_encode($apiData, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);

        // 计算签名
        $signature = $this->generateSignature($payload);
        $payload['signature'] = $signature;

        return $payload;
    }

    /**
     * 生成签名
     *
     * 复用 SignHelper 的通用签名算法
     * 货拉拉要求32位小写MD5签名，而 SignHelper 返回大写，所以需要转为小写
     *
     * @param array $params 待签名参数（不包括signature）
     * @return string 签名值（32位小写）
     */
    protected function generateSignature($params)
    {

        // 使用 SignHelper 的通用签名算法
        $sign = SignHelper::makeSign($params, $this->appSecret);

        // 货拉拉 API 要求32位小写，转换为小写
        return strtolower($sign);
    }

    public function generateSignatureWithoutAppSecret($params)
    {
        $sign = SignHelper::makeSign($params, '');
        return strtolower($sign);
    }

    /**
     * 生成随机数字符串
     *
     * @param int $length 长度
     * @return string 随机字符串
     */
    protected function generateNonceStr($length = 16)
    {
        $chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
        $str = '';
        for ($i = 0; $i < $length; $i++) {
            $str .= $chars[random_int(0, strlen($chars) - 1)];
        }
        return $str;
    }

    public function getIsSandbox()
    {
        return $this->isSandbox;
    }
}