<?php
namespace Modules\Ecommerce\Services;

use GuzzleHttp\Client;
use Illuminate\Support\Facades\Log;

class TaobaoService
{
    protected $appKey;
    protected $appSecret;
    protected $accessToken;
    protected $gateway = 'https://eco.taobao.com/router/rest';

    public function __construct($appKey, $appSecret, $accessToken)
    {
        $this->appKey = $appKey;
        $this->appSecret = $appSecret;
        $this->accessToken = $accessToken;
    }

    /**
     * 拉取订单列表（taobao.trades.sold.get）
     *
     * @param string $startTime 起始时间，格式：Y-m-d H:i:s
     * @param string $endTime   结束时间
     * @return array
     * @throws \Exception
     */
    public function fetchOrders($startTime, $endTime)
    {
        $params = [
            'method' => 'taobao.trades.sold.get',
            'app_key' => $this->appKey,
            'session' => $this->accessToken,
            'timestamp' => date('Y-m-d H:i:s'),
            'format' => 'json',
            'v' => '2.0',
            'sign_method' => 'hmac-sha256',
            'fields' => 'tid,status,payment,receiver_name,receiver_city,receiver_district,receiver_address,orders',
            'start_created' => $startTime,
            'end_created' => $endTime,
        ];

        $params['sign'] = $this->generateSign($params);

        try {
            $client = new Client();
            $response = $client->post($this->gateway, [
                'form_params' => $params,
                'timeout' => 30,
            ]);

            $result = json_decode($response->getBody(), true);

            // 检查淘宝API返回的错误
            if (isset($result['error_response'])) {
                throw new \Exception('淘宝API错误: ' . $result['error_response']['msg']);
            }

            return $result;
        } catch (\Exception $e) {
            Log::error('淘宝订单拉取失败', ['error' => $e->getMessage()]);
            throw $e;
        }
    }

    /**
     * 生成签名
     *
     * @param array $params
     * @return string
     */
    protected function generateSign($params)
    {
        ksort($params);
        $stringToSign = $this->appSecret;
        foreach ($params as $key => $value) {
            if ($key != 'sign' && $value !== '') {
                $stringToSign .= $key . $value;
            }
        }
        $stringToSign .= $this->appSecret;

        return strtoupper(hash_hmac('sha256', $stringToSign, $this->appSecret));
    }
}