<?php

namespace app\api\controller;

use think\facade\Cache;
use think\facade\Log;

class CryptoController extends BaseApiController
{
    public array $notNeedLogin = ['proxy'];

    /**
     * Binance API 代理（解决客户端直连被墙问题）
     * GET /api/crypto/proxy?path=/api/v3/ticker/24hr&symbols=...
     */
    public function proxy()
    {
        $path = $this->request->get('path', '');
        if (empty($path) || !str_starts_with($path, '/api/v3/')) {
            return $this->fail('无效的API路径');
        }

        // 构建完整URL，将除 path 外的参数透传
        $params = $this->request->get();
        unset($params['path']);
        ksort($params);
        $query = http_build_query($params);
        $url = 'https://api.binance.com' . $path . ($query ? '?' . $query : '');

        $cacheKey = 'binance_proxy_' . md5($path . '|' . $query);
        $cached = Cache::get($cacheKey);
        if ($cached !== null) {
            return json($cached, 200);
        }

        Log::info('[CryptoProxy] request url=' . $url);

        $ch = curl_init();
        curl_setopt_array($ch, [
            CURLOPT_URL => $url,
            CURLOPT_RETURNTRANSFER => true,
            CURLOPT_TIMEOUT => 15,
            CURLOPT_CONNECTTIMEOUT => 5,
            CURLOPT_SSL_VERIFYPEER => false,
            CURLOPT_HTTPHEADER => ['Accept: application/json'],
        ]);
        $response = curl_exec($ch);
        $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
        $error = curl_error($ch);
        curl_close($ch);

        if ($error) {
            Log::error('[CryptoProxy] curl_error=' . $error . ' url=' . $url);
            return $this->fail('API请求失败: ' . $error);
        }

        Log::info('[CryptoProxy] http_code=' . $httpCode . ' response_preview=' . substr((string) $response, 0, 500));

        $data = json_decode($response, true);
        if ($httpCode === 200 && $data !== null) {
            Cache::set($cacheKey, $data, 3);
        }
        return json($data, $httpCode);
    }
}