<?php
namespace common\components\delivery\services\adapter;

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

/**
 * 达达（DaDa）配送平台适配器
 * 
 * 基于达达开放平台 API 接口规范进行封装
 * API 文档参考：达达开放平台 - 接口调用协议与签名算法
 */
class DadaAdapter implements Adapter
{
    // API 配置常量
    const API_VERSION = '1.0';
    const FORMAT = 'json';
    const RESPONSE_TYPE = 'code';
    
    // 测试环境和生产环境基础 URL
    const TEST_BASE_URL = 'https://newopen.qa.imdada.cn';
    const PROD_BASE_URL = 'https://newopen.imdada.cn';

    protected $baseUrl;
    protected $appKey;
    protected $appSecret;
    protected $sourceId;
    protected $isSandbox;

    /**
     * 初始化达达适配器
     * 根据运行环境加载对应的配置信息
     */
    public function __construct()
    {
        $isProduction = getenv('YII_ENV') == 'production';
        
        if ($isProduction) {
            // 生产环境配置（需要替换为实际的生产环境凭证）
            $this->baseUrl = self::PROD_BASE_URL;
            $this->appKey = 'dadaf2279d901a5ba40';
            $this->appSecret = '828a03677a1c00a3a5b3c59209c4433d';
            $this->sourceId = '499021274';
        } else {
            // 测试环境配置（需要替换为实际的测试环境凭证）
            $this->baseUrl = self::TEST_BASE_URL;
            $this->appKey = 'dadaf2279d901a5ba40';
            $this->appSecret = '828a03677a1c00a3a5b3c59209c4433d';
            $this->sourceId = '499021274';
        }
        
        $this->isSandbox = !$isProduction;
    }

    /**
     * 获取已开通城市列表
     * 
     * 通过此接口可获取到达达配送业务所有已开通的城市列表信息
     * 
     * @return array 包含城市列表的响应数据
     *   示例结构：
     *   [
     *       'status' => 'success',
     *       'code' => 0,
     *       'msg' => '成功',
     *       'result' => [
     *           'cityList' => [
     *               [
     *                   'cityCode' => '110101',
     *                   'cityName' => '东城区',
     *                   'provinceName' => '北京市',
     *               ],
     *               // ... 更多城市
     *           ]
     *       ]
     *   ]
     */
    public function cityList()
    {
        // 业务参数为空时使用空字符串
        $body = '';
        
        // 构建完整的 API 请求参数
        $payload = $this->buildRequestPayload('cityList', $body);
        
        // 发送 POST 请求
        $resp = HttpClient::post("{$this->baseUrl}/cityList", $payload);
        
        return $resp;
    }

    /**
     * 创建订单（指派订单给配送员）
     * 
     * 根据达达官方文档实现下单功能
     * 
     * @param array $data 订单数据，结构参考：
     *   [
     *       'order_id' => '订单编号' (必需),           // 商户系统内部订单编号
     *       'shop_no' => '门店编号' (必需),           // 门店编号
     *       'transporter_id' => 配送员ID (必需),      // 指定配送员ID（可选，为空则由系统自动分配）
     *       'receiver_name' => '收货人名称' (可选),
     *       'receiver_address' => '收货地址' (可选),
     *       'receiver_phone' => '收货人电话' (可选),
     *       'receiver_lng' => 经度 (可选),
     *       'receiver_lat' => 纬度 (可选),
     *       'cargo_price' => 货物价格(分) (可选),
     *       'tips' => 小费(分) (可选),
     *       'distance' => 距离(米) (可选),
     *       'prepare_time' => 商品准备时间 (可选),    // 单位：秒
     *       'remark' => '备注' (可选),
     *       'callback' => '回调地址' (可选),
     *   ]
     * @return array API 响应结果
     */
    public function createOrder($data)
    {
        // 验证必需字段
        if (empty($data['order_id']) || empty($data['shop_no'])) {
            return [
                'code' => -1,
                'msg' => '缺少必需参数: order_id 和 shop_no'
            ];
        }

        // 构建业务参数（按达达 API 规范）
        $apiData = [
            'order_id' => $data['order_id'],
            'shop_no' => $data['shop_no'],
        ];

        // 如果指定了配送员ID，添加到请求
        if (isset($data['transporter_id'])) {
            $apiData['transporter_id'] = (int)$data['transporter_id'];
        }

        // 可选参数
        if (!empty($data['receiver_name'])) {
            $apiData['receiver_name'] = $data['receiver_name'];
        }
        if (!empty($data['receiver_address'])) {
            $apiData['receiver_address'] = $data['receiver_address'];
        }
        if (!empty($data['receiver_phone'])) {
            $apiData['receiver_phone'] = $data['receiver_phone'];
        }
        if (isset($data['receiver_lng']) && $data['receiver_lng'] !== '') {
            $apiData['receiver_lng'] = (double)$data['receiver_lng'];
        }
        if (isset($data['receiver_lat']) && $data['receiver_lat'] !== '') {
            $apiData['receiver_lat'] = (double)$data['receiver_lat'];
        }
        if (isset($data['cargo_price'])) {
            $apiData['cargo_price'] = (int)$data['cargo_price'];
        }
        if (isset($data['tips'])) {
            $apiData['tips'] = (int)$data['tips'];
        }
        if (isset($data['distance'])) {
            $apiData['distance'] = (int)$data['distance'];
        }
        if (isset($data['prepare_time'])) {
            $apiData['prepare_time'] = (int)$data['prepare_time'];
        }
        if (!empty($data['remark'])) {
            $apiData['remark'] = $data['remark'];
        }
        if (!empty($data['callback'])) {
            $apiData['callback'] = $data['callback'];
        }

        // 将业务参数转换为 JSON 字符串
        $body = json_encode($apiData, JSON_UNESCAPED_UNICODE);

        // 构建完整的 API 请求参数
        $payload = $this->buildRequestPayload('orderAddRequest', $body);

        // 发送 POST 请求
        $resp = HttpClient::post("{$this->baseUrl}/orderAddRequest", $payload);

        return $resp;
    }

    /**
     * 获取订单运费报价
     * 
     * 根据达达官方文档实现订单运费估价功能
     * 
     * @param array $data 运费估价参数，结构参考：
     *   [
     *       'shop_no' => '门店编号' (必需),
     *       'origin_id' => '原始订单ID' (必需),       // 商户侧订单编号
     *       'receiver_address' => '收货地址' (必需),
     *       'receiver_phone' => '收货人电话' (必需),
     *       'receiver_lng' => 经度 (必需),
     *       'receiver_lat' => 纬度 (必需),
     *       'cargo_price' => 货物价格(分) (可选),    // 商品价格，单位为分
     *       'distance' => 距离(米) (可选),
     *       'prepare_time' => 商品准备时间 (可选),   // 单位：秒
     *   ]
     * @return array|null 运费报价结果
     */
    public function getPrice($data)
    {
        // 验证必需字段
        if (empty($data['shop_no']) || empty($data['origin_id']) || 
            empty($data['receiver_address']) || empty($data['receiver_phone']) ||
            !isset($data['receiver_lng']) || !isset($data['receiver_lat'])) {
            return [
                'code' => -1,
                'msg' => '缺少必需参数'
            ];
        }

        // 构建业务参数（按达达 API 规范）
        $apiData = [
            'shop_no' => $data['shop_no'],
            'origin_id' => $data['origin_id'],
            'receiver_address' => $data['receiver_address'],
            'receiver_phone' => $data['receiver_phone'],
            'receiver_lng' => (double)$data['receiver_lng'],
            'receiver_lat' => (double)$data['receiver_lat'],
        ];

        // 可选参数
        if (isset($data['cargo_price'])) {
            $apiData['cargo_price'] = (int)$data['cargo_price'];
        }
        if (isset($data['distance'])) {
            $apiData['distance'] = (int)$data['distance'];
        }
        if (isset($data['prepare_time'])) {
            $apiData['prepare_time'] = (int)$data['prepare_time'];
        }

        // 将业务参数转换为 JSON 字符串
        $body = json_encode($apiData, JSON_UNESCAPED_UNICODE);

        // 构建完整的 API 请求参数
        $payload = $this->buildRequestPayload('queryDeliverFee', $body);

        // 发送 POST 请求
        $resp = HttpClient::post("{$this->baseUrl}/queryDeliverFee", $payload);

        // 处理响应
        if (isset($resp['status']) && $resp['status'] === 'success' && $resp['code'] == 0) {
            $result = $resp['result'] ?? [];
            return [
                'code' => 0,
                'platform' => 'dada',
                'deliver_fee' => $result['deliver_fee'] ?? 0,           // 配送费(分)
                'distance' => $result['distance'] ?? 0,                 // 距离(米)
                'duration' => $result['duration'] ?? 0,                 // 配送时间(分钟)
                'tips' => $result['tips'] ?? 0,                         // 小费(分)
            ];
        }

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

    /**
     * 构建达达 API 请求参数
     * 
     * 根据达达 API 规范构建完整的请求参数，包括签名
     * 参数说明详见接口协议文档
     * 
     * @param string $apiMethod 接口方法名（不包括基础 URL）
     * @param string $body 业务参数 JSON 字符串
     * @return array 完整的 POST 请求参数
     */
    protected function buildRequestPayload($apiMethod, $body = '')
    {
        // 获取当前时间戳（单位：秒）
        $timestamp = (string)time();

        // 构建待签名的参数（不包括 signature）
        $params = [
            'app_key' => $this->appKey,
            'v' => self::API_VERSION,
            'format' => self::FORMAT,
            'source_id' => $this->sourceId,
            'timestamp' => $timestamp,
            'body' => $body,
        ];

        // 计算签名（按达达 API 规范）
        $signature = $this->generateSignature($params);

        // 加入签名到请求参数
        $params['signature'] = $signature;

        return $params;
    }

    /**
     * 生成达达 API 签名
     * 
     * 达达签名算法：
     * 1. 将所有参数（除 signature 外）按 key 升序排列
     * 2. 拼接为 key1value1key2value2...keyNvalueN 的形式
     * 3. 在字符串后面加上 app_secret
     * 4. 对结果进行 MD5 加密，得到 32 位大写字符串
     * 
     * @param array $params 待签名参数（不包括 signature）
     * @return string 签名值（32 位大写）
     */
    protected function generateSignature($params)
    {
        // 按 key 升序排列参数
        ksort($params);

        // 拼接参数字符串
        $str = '';
        foreach ($params as $key => $value) {
            // 跳过空值
            if ($value === '' || $value === null) {
                continue;
            }
            $str .= $key . $value;
        }

        // 加上 app_secret
        $str .= $this->appSecret;

        // MD5 加密，返回 32 位大写字符串
        return strtoupper(md5($str));
    }

    /**
     * 生成随机数字符串（备用方法，如需要使用）
     * 
     * @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;
    }
}