<?php
$file = 'counter.dat';

// 读取并自增
$counter = (int)@file_get_contents($file);
$counter++;

// 使用 LOCK_EX 防止并发写入冲突
file_put_contents($file, $counter, LOCK_EX); 
?>
<?php
/**
 * ICP备案查询API
 * 支持通过域名查询网站的ICP备案信息
 */

header('Content-Type: application/json; charset=utf-8');
header('Access-Control-Allow-Origin: *');

// 获取请求参数
$domain = isset($_GET['domain']) ? trim($_GET['domain']) : '';
$type = isset($_GET['type']) ? trim($_GET['type']) : 'json';

// 验证域名参数
if (empty($domain)) {
    http_response_code(400);
    echo json_encode([
        'status' => 'error',
        'code' => 400,
        'message' => '缺少必要参数: domain',
        'example' => '/api/icp/index.php?domain=example.com'
    ], JSON_UNESCAPED_UNICODE);
    exit;
}

// 清理域名格式（移除http://或https://）
$domain = preg_replace('/^https?:\/\//i', '', $domain);
$domain = preg_replace('/\/.*$/', '', $domain);
$domain = strtolower(trim($domain));

// 验证域名格式
if (!preg_match('/^([a-z0-9]([a-z0-9\-]{0,61}[a-z0-9])?\.)+[a-z]{2,}$/i', $domain)) {
    http_response_code(400);
    echo json_encode([
        'status' => 'error',
        'code' => 400,
        'message' => '无效的域名格式',
        'domain' => $domain
    ], JSON_UNESCAPED_UNICODE);
    exit;
}

// 查询ICP信息
$result = queryICP($domain);

// 根据type参数返回不同格式
if ($type === 'text') {
    header('Content-Type: text/plain; charset=utf-8');
    if ($result['status'] === 'success') {
        echo "域名: " . $result['data']['domain'] . "\n";
        echo "主办单位: " . $result['data']['owner'] . "\n";
        echo "ICP编号: " . $result['data']['icp'] . "\n";
        echo "审核时间: " . $result['data']['checkDate'] . "\n";
        echo "网站名称: " . $result['data']['siteName'] . "\n";
    } else {
        echo "查询失败: " . $result['message'];
    }
} else {
    echo json_encode($result, JSON_UNESCAPED_UNICODE | JSON_PRETTY_PRINT);
}

/**
 * 查询ICP信息
 * @param string $domain 域名
 * @return array 返回结果数组
 */
function queryICP($domain) {
    $result = [
        'status' => 'error',
        'code' => 500,
        'message' => '查询失败',
        'domain' => $domain,
        'data' => null
    ];

    try {
        // 方法1: 使用API Vat接口（返回JSON格式）
        $apiurl = "https://api.vat.tools/query?domain=" . urlencode($domain);
        $data = callApi($apiurl);
        if ($data && isset($data['icp'])) {
            $result['status'] = 'success';
            $result['code'] = 200;
            $result['message'] = '查询成功';
            $result['data'] = [
                'domain' => $domain,
                'icp' => $data['icp'] ?? 'N/A',
                'owner' => $data['organizer'] ?? $data['owner'] ?? 'N/A',
                'siteName' => $data['website_name'] ?? $data['name'] ?? 'N/A',
                'checkDate' => $data['check_date'] ?? $data['approve_date'] ?? 'N/A',
                'siteNature' => $data['site_nature'] ?? 'N/A',
                'source' => 'api.vat.tools'
            ];
            return $result;
        }

        // 方法2: 使用天聪API
        $apiurl2 = "https://api.tiancong.info/api/queryIcp?domain=" . urlencode($domain);
        $data2 = callApi($apiurl2);
        if ($data2 && isset($data2['code']) && $data2['code'] == 0 && isset($data2['data'])) {
            $icpData = $data2['data'];
            $result['status'] = 'success';
            $result['code'] = 200;
            $result['message'] = '查询成功';
            $result['data'] = [
                'domain' => $domain,
                'icp' => $icpData['icp'] ?? 'N/A',
                'owner' => $icpData['unitname'] ?? 'N/A',
                'siteName' => $icpData['sitename'] ?? 'N/A',
                'checkDate' => $icpData['checkdate'] ?? 'N/A',
                'siteNature' => $icpData['sitenature'] ?? 'N/A',
                'source' => 'tiancong.info'
            ];
            return $result;
        }

        // 方法3: 使用免费ICP API
        $apiurl3 = "https://ijscode.top/api/icp.php?url=" . urlencode($domain);
        $data3 = callApi($apiurl3);
        if ($data3 && isset($data3['icp'])) {
            $result['status'] = 'success';
            $result['code'] = 200;
            $result['message'] = '查询成功';
            $result['data'] = [
                'domain' => $domain,
                'icp' => $data3['icp'] ?? 'N/A',
                'owner' => $data3['belong'] ?? 'N/A',
                'siteName' => $data3['name'] ?? 'N/A',
                'checkDate' => $data3['time'] ?? 'N/A',
                'source' => 'ijscode'
            ];
            return $result;
        }

        // 方法4: 使用aizhan.com (改进的HTML解析)
        $apiurl4 = "https://icp.aizhan.com/index.php?domain=" . urlencode($domain);
        $htmlData = callApi($apiurl4, false);
        if ($htmlData) {
            $parsedData = parseICPData($htmlData, $domain);
            if ($parsedData) {
                $result['status'] = 'success';
                $result['code'] = 200;
                $result['message'] = '查询成功';
                $result['data'] = $parsedData;
                return $result;
            }
        }

        // 方法5: 备用API - ICP查询
        $backupUrl = "https://www.beianx.com/search/?q=" . urlencode($domain);
        $htmlResponse = callApi($backupUrl, false);
        if ($htmlResponse) {
            $backupData = parseBeianxData($htmlResponse, $domain);
            if ($backupData) {
                $result['status'] = 'success';
                $result['code'] = 200;
                $result['message'] = '查询成功';
                $result['data'] = $backupData;
                return $result;
            }
        }

        // 如果都失败，返回默认的未备案状态
        $result['status'] = 'not_found';
        $result['code'] = 404;
        $result['message'] = '未找到ICP备案信息（该域名可能未在中国备案或各查询源暂时不可用）';
        
    } catch (Exception $e) {
        $result['message'] = '查询异常: ' . $e->getMessage();
    }

    return $result;
}

/**
 * 通用HTTP调用函数
 */
function callApi($url, $isJson = true) {
    try {
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_TIMEOUT, 10);
        curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 5);
        curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36');
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
        curl_setopt($ch, CURLOPT_MAXREDIRS, 3);
        
        $response = curl_exec($ch);
        $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
        $curlError = curl_error($ch);
        curl_close($ch);

        if ($httpCode !== 200 || empty($response)) {
            return null;
        }

        if ($isJson) {
            return json_decode($response, true);
        }
        
        return $response;
    } catch (Exception $e) {
        return null;
    }
}

/**
 * 解析aizhan.com返回的ICP数据
 */
function parseICPData($html, $domain) {
    // 移除脚本和样式
    $html = preg_replace('/<script\b[^<]*(?:(?!<\/script>)<[^<]*)*<\/script>/i', '', $html);
    $html = preg_replace('/<style\b[^<]*(?:(?!<\/style>)<[^<]*)*<\/style>/i', '', $html);
    
    // 提取ICP编号 - 多种格式支持
    $icpPatterns = [
        '/[\d\u4e00-\u9fa5]+-ICP-\d{8}/iu',  // 原格式
        '/ICP[\u4e00-\u9fa5]?\d{8,}/iu',      // 新格式
        '/[\d]{8}\|[\d]{8}/u',                // 竖线格式
    ];
    $icp = '';
    foreach ($icpPatterns as $pattern) {
        if (preg_match($pattern, $html, $matches)) {
            $icp = $matches[0];
            break;
        }
    }

    // 提取主办单位 - 多种选择器
    $ownerPatterns = [
        '/>([^<]*?单位[^<]*?)</i',
        '/主办单位[^>]*>([^<]+)</i',
        '/<td[^>]*>([^<]*?单位[^<]*?)<\/td>/i',
    ];
    $owner = '';
    foreach ($ownerPatterns as $pattern) {
        if (preg_match($pattern, $html, $matches)) {
            $owner = trim(strip_tags($matches[1]));
            if (!empty($owner)) break;
        }
    }

    // 提取网站名称
    $siteNamePatterns = [
        '/网站名称[^>]*>([^<]+)</i',
        '/<td[^>]*>网站名称<\/td>\s*<td[^>]*>([^<]+)</i',
    ];
    $siteName = '';
    foreach ($siteNamePatterns as $pattern) {
        if (preg_match($pattern, $html, $matches)) {
            $siteName = trim(strip_tags($matches[1]));
            if (!empty($siteName)) break;
        }
    }

    // 提取审核时间
    $datePatterns = [
        '/审核时间[^>]*>([^<]+)</i',
        '/<td[^>]*>([12]\d{3}-\d{2}-\d{2})<\/td>/i',
    ];
    $checkDate = '';
    foreach ($datePatterns as $pattern) {
        if (preg_match($pattern, $html, $matches)) {
            $checkDate = trim(strip_tags($matches[1]));
            if (!empty($checkDate)) break;
        }
    }

    if (!empty($icp) || !empty($owner) || !empty($siteName)) {
        return [
            'domain' => $domain,
            'icp' => $icp ?: 'N/A',
            'owner' => $owner ?: 'N/A',
            'siteName' => $siteName ?: 'N/A',
            'checkDate' => $checkDate ?: 'N/A',
            'source' => 'aizhan.com'
        ];
    }

    return null;
}

/**
 * 解析beianx.com返回的数据
 */
function parseBeianxData($html, $domain) {
    $html = preg_replace('/<script\b[^<]*(?:(?!<\/script>)<[^<]*)*<\/script>/i', '', $html);
    $html = preg_replace('/<style\b[^<]*(?:(?!<\/style>)<[^<]*)*<\/style>/i', '', $html);
    
    // 提取ICP编号 - 多种格式
    $icpPatterns = [
        '/[\d\u4e00-\u9fa5]+-ICP-\d{8}/iu',
        '/ICP[\u4e00-\u9fa5]?\d{8,}/iu',
        '/>([^<]*ICP[^<]*?)\</i',
    ];
    $icp = '';
    foreach ($icpPatterns as $pattern) {
        if (preg_match($pattern, $html, $matches)) {
            $icp = trim(isset($matches[1]) ? $matches[1] : $matches[0]);
            if (!empty($icp)) break;
        }
    }

    // 从表格中提取信息
    $owner = extractTableValue($html, '主办单位');
    if (empty($owner)) {
        $owner = extractTableValue($html, '单位');
    }
    
    $siteName = extractTableValue($html, '网站名称');
    if (empty($siteName)) {
        $siteName = extractTableValue($html, '名称');
    }
    
    $checkDate = extractTableValue($html, '审核时间');
    if (empty($checkDate)) {
        $checkDate = extractTableValue($html, '时间');
    }

    if (!empty($icp) || !empty($owner) || !empty($siteName)) {
        return [
            'domain' => $domain,
            'icp' => $icp ?: 'N/A',
            'owner' => $owner ?: 'N/A',
            'siteName' => $siteName ?: 'N/A',
            'checkDate' => $checkDate ?: 'N/A',
            'source' => 'beianx.com'
        ];
    }

    return null;
}

/**
 * 从HTML表格中提取指定标签的值
 */
function extractTableValue($html, $label) {
    $pattern = '/' . preg_quote($label) . '[^<]*?<[^>]*>([^<]+)<[^>]*>/is';
    if (preg_match($pattern, $html, $matches)) {
        return trim($matches[1]);
    }
    return '';
}