<?php
namespace App\Services\Platform;

use App\Models\ShopAuth;
use Illuminate\Support\Facades\Http;
use Illuminate\Support\Facades\Log;

class TaobaoClient
{
    protected $shopAuth;
    protected $appKey;
    protected $appSecret;

    public function __construct(ShopAuth $shopAuth)
    {
        $this->shopAuth = $shopAuth;
        $this->appKey = config('platforms.taobao.app_key');
        $this->appSecret = config('platforms.taobao.app_secret');
    }

    /**
     * 拉取订单列表
     *
     * @param array $params
     * @return array 标准化的订单数据
     * @throws \Exception
     */
    public function getOrders(array $params = [])
    {
        $this->ensureToken();

        $requestParams = [
            'method' => 'taobao.trades.sold.get',
            'app_key' => $this->appKey,
            'session' => $this->shopAuth->access_token,
            'timestamp' => date('Y-m-d H:i:s'),
            'v' => '2.0',
            'format' => 'json',
            'fields' => 'tid,type,status,payment,orders,receiver_name,receiver_phone,receiver_address,created,modified,pay_time',
            'page_no' => $params['page_no'] ?? 1,
            'page_size' => min($params['page_size'] ?? 40, 100),
        ];

        if (!empty($params['start_time'])) {
            $requestParams['start_created'] = $params['start_time'];
        }
        if (!empty($params['end_time'])) {
            $requestParams['end_created'] = $params['end_time'];
        }

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

        try {
            $response = Http::timeout(30)->get('https://eco.taobao.com/router/rest', $requestParams);
            $result = $response->json();
        } catch (\Exception $e) {
            Log::error('淘宝API请求失败', ['error' => $e->getMessage()]);
            throw new \Exception('网络请求失败：' . $e->getMessage());
        }

        if (isset($result['error_response'])) {
            $errorCode = $result['error_response']['code'];
            $errorMsg = $result['error_response']['msg'];
            // token 失效则刷新重试一次
            if (in_array($errorCode, [26, 27])) {
                $this->refreshToken();
                return $this->getOrders($params);
            }
            throw new \Exception("淘宝API错误 [{$errorCode}]: {$errorMsg}");
        }

        $trades = $result['trades_sold_get_response']['trades']['trade'] ?? [];
        return $this->transformOrders($trades);
    }

    protected function refreshToken()
    {
        $params = [
            'method' => 'taobao.top.auth.token.refresh',
            'app_key' => $this->appKey,
            'session' => $this->shopAuth->refresh_token,
            'timestamp' => date('Y-m-d H:i:s'),
            'v' => '2.0',
            'format' => 'json',
        ];
        $params['sign'] = $this->generateSign($params);

        $response = Http::get('https://eco.taobao.com/router/rest', $params);
        $result = $response->json();

        if (isset($result['error_response'])) {
            throw new \Exception('刷新Token失败：' . $result['error_response']['msg']);
        }

        $tokenData = $result['top_auth_token_refresh_response'];
        $this->shopAuth->access_token = $tokenData['access_token'];
        $this->shopAuth->expires_at = now()->addSeconds($tokenData['expires_in']);
        $this->shopAuth->refresh_token = $tokenData['refresh_token'] ?? $this->shopAuth->refresh_token;
        $this->shopAuth->save();
    }

    protected function ensureToken()
    {
        if ($this->shopAuth->expires_at && $this->shopAuth->expires_at->isPast()) {
            $this->refreshToken();
        }
    }

    protected function generateSign($params)
    {
        ksort($params);
        $str = $this->appSecret;
        foreach ($params as $k => $v) {
            if ($k !== 'sign') {
                $str .= $k . $v;
            }
        }
        $str .= $this->appSecret;
        return strtoupper(md5($str));
    }

    protected function transformOrders($trades)
    {
        $orders = [];
        foreach ($trades as $trade) {
            $orders[] = [
                'platform_order_sn' => (string)$trade['tid'],
                'order_time' => $trade['created'],
                'payment_time' => $trade['pay_time'] ?? null,
                'buyer_nick' => $trade['buyer_nick'] ?? '',
                'receiver_name' => $trade['receiver_name'],
                'receiver_phone' => $trade['receiver_phone'],
                'receiver_address' => $trade['receiver_address'],
                'goods_amount' => $trade['payment'] ?? 0,
                'discount_amount' => 0,
                'freight' => 0,
                'total_amount' => $trade['payment'] ?? 0,
                'platform_status' => $trade['status'],
                'items' => $this->transformItems($trade['orders']['order'] ?? []),
            ];
        }
        return $orders;
    }

    protected function transformItems($items)
    {
        $result = [];
        foreach ($items as $item) {
            $result[] = [
                'goods_name' => $item['title'],
                'platform_sku' => (string)($item['sku_id'] ?? $item['num_iid']),
                'quantity' => $item['num'],
                'price' => $item['price'],
                'total_amount' => $item['total_fee'],
            ];
        }
        return $result;
    }
}