<?php
/**
 * AI SEO Generator API测试文件
 * 用于测试Dify API连接和功能验证
 */

// 防止直接访问
if (!defined('ABSPATH')) {
    exit;
}

/**
 * API测试类
 */
class AiSeoApiTest {
    
    private $api_key;
    private $api_url;
    
    /**
     * 构造函数
     */
    public function __construct() {
        $this->api_key = get_option('ai_seo_api_key', '');
        $this->api_url = get_option('ai_seo_api_url', '');
    }
    
    /**
     * 测试API连接
     */
    public function test_connection() {
        $test_data = array(
            'status' => 'unknown',
            'message' => '',
            'response_time' => 0,
            'details' => array()
        );
        
        $start_time = microtime(true);
        
        try {
            $response = wp_remote_get($this->api_url, array(
                'headers' => array(
                    'Authorization' => 'Bearer ' . $this->api_key,
                    'Content-Type' => 'application/json'
                ),
                'timeout' => 10
            ));
            
            $end_time = microtime(true);
            $test_data['response_time'] = round(($end_time - $start_time) * 1000, 2);
            
            if (is_wp_error($response)) {
                $test_data['status'] = 'error';
                $test_data['message'] = $response->get_error_message();
            } else {
                $status_code = wp_remote_retrieve_response_code($response);
                $test_data['details']['status_code'] = $status_code;
                
                if ($status_code >= 200 && $status_code < 300) {
                    $test_data['status'] = 'success';
                    $test_data['message'] = 'API连接成功';
                } else {
                    $test_data['status'] = 'error';
                    $test_data['message'] = 'API返回错误状态码: ' . $status_code;
                }
            }
            
        } catch (Exception $e) {
            $test_data['status'] = 'error';
            $test_data['message'] = '连接异常: ' . $e->getMessage();
        }
        
        return $test_data;
    }
    
    /**
     * 测试SEO内容生成
     */
    public function test_seo_generation() {
        $test_content = array(
            'title' => 'WordPress插件开发指南',
            'content' => 'WordPress是世界上最流行的内容管理系统之一，拥有强大的插件生态系统。本文将介绍如何开发一个WordPress插件，包括基本结构、钩子系统、数据库操作等核心概念。我们还将探讨最佳实践和安全考虑，帮助开发者创建高质量的插件。'
        );
        
        $test_data = array(
            'status' => 'unknown',
            'message' => '',
            'generated_content' => null,
            'response_time' => 0
        );
        
        $start_time = microtime(true);
        
        try {
            $prompt = "请根据以下文章标题和内容，生成SEO优化的标题(Title)、描述(Description)和关键词(Keywords)：\n\n标题：{$test_content['title']}\n\n内容：{$test_content['content']}\n\n请以JSON格式返回，包含title、description、keywords字段。";
            
            $response = wp_remote_post($this->api_url . '/chat-messages', array(
                'headers' => array(
                    'Authorization' => 'Bearer ' . $this->api_key,
                    'Content-Type' => 'application/json'
                ),
                'body' => json_encode(array(
                    'inputs' => array(),
                    'query' => $prompt,
                    'response_mode' => 'blocking',
                    'user' => 'test-user'
                )),
                'timeout' => 30
            ));
            
            $end_time = microtime(true);
            $test_data['response_time'] = round(($end_time - $start_time) * 1000, 2);
            
            if (is_wp_error($response)) {
                $test_data['status'] = 'error';
                $test_data['message'] = $response->get_error_message();
            } else {
                $status_code = wp_remote_retrieve_response_code($response);
                $body = wp_remote_retrieve_body($response);
                $data = json_decode($body, true);
                
                if ($status_code === 200 && isset($data['answer'])) {
                    // 尝试从AI回答中提取JSON
                    $answer = $data['answer'];
                    preg_match('/\{.*\}/s', $answer, $matches);
                    
                    if (!empty($matches[0])) {
                        $seo_data = json_decode($matches[0], true);
                        if ($seo_data && isset($seo_data['title'], $seo_data['description'], $seo_data['keywords'])) {
                            $test_data['status'] = 'success';
                            $test_data['message'] = 'SEO内容生成成功';
                            $test_data['generated_content'] = $seo_data;
                        } else {
                            $test_data['status'] = 'error';
                            $test_data['message'] = '无法解析AI返回的JSON格式';
                            $test_data['raw_response'] = $answer;
                        }
                    } else {
                        $test_data['status'] = 'error';
                        $test_data['message'] = 'AI返回格式不正确';
                        $test_data['raw_response'] = $answer;
                    }
                } else {
                    $test_data['status'] = 'error';
                    $test_data['message'] = 'API返回错误: ' . $status_code;
                    $test_data['raw_response'] = $body;
                }
            }
            
        } catch (Exception $e) {
            $test_data['status'] = 'error';
            $test_data['message'] = '生成异常: ' . $e->getMessage();
        }
        
        return $test_data;
    }
    
    /**
     * 运行完整测试套件
     */
    public function run_full_test() {
        $results = array(
            'connection_test' => $this->test_connection(),
            'generation_test' => $this->test_seo_generation(),
            'system_info' => $this->get_system_info(),
            'plugin_info' => $this->get_plugin_info()
        );
        
        // 计算总体状态
        $overall_status = 'success';
        if ($results['connection_test']['status'] === 'error' || $results['generation_test']['status'] === 'error') {
            $overall_status = 'error';
        }
        
        $results['overall_status'] = $overall_status;
        $results['test_time'] = current_time('Y-m-d H:i:s');
        
        return $results;
    }
    
    /**
     * 获取系统信息
     */
    private function get_system_info() {
        global $wp_version;
        
        return array(
            'wordpress_version' => $wp_version,
            'php_version' => PHP_VERSION,
            'curl_enabled' => extension_loaded('curl'),
            'json_enabled' => extension_loaded('json'),
            'memory_limit' => ini_get('memory_limit'),
            'max_execution_time' => ini_get('max_execution_time'),
            'upload_max_filesize' => ini_get('upload_max_filesize')
        );
    }
    
    /**
     * 获取插件信息
     */
    private function get_plugin_info() {
        return array(
            'plugin_version' => AI_SEO_VERSION,
            'plugin_path' => AI_SEO_PLUGIN_PATH,
            'plugin_url' => AI_SEO_PLUGIN_URL,
            'api_key_configured' => !empty($this->api_key),
            'api_url_configured' => !empty($this->api_url),
            'database_version' => get_option('ai_seo_db_version', '0')
        );
    }
    
    /**
     * 生成测试报告HTML
     */
    public function generate_test_report() {
        $results = $this->run_full_test();
        
        ob_start();
        ?>
        <div class="ai-seo-test-report">
            <h2>🧪 AI SEO Generator 测试报告</h2>
            
            <div class="test-summary">
                <h3>测试概览</h3>
                <p><strong>总体状态:</strong> 
                    <span class="status-<?php echo $results['overall_status']; ?>">
                        <?php echo $results['overall_status'] === 'success' ? '✅ 通过' : '❌ 失败'; ?>
                    </span>
                </p>
                <p><strong>测试时间:</strong> <?php echo $results['test_time']; ?></p>
            </div>
            
            <div class="test-details">
                <h3>连接测试</h3>
                <div class="test-item">
                    <p><strong>状态:</strong> 
                        <span class="status-<?php echo $results['connection_test']['status']; ?>">
                            <?php echo $results['connection_test']['status'] === 'success' ? '✅ 成功' : '❌ 失败'; ?>
                        </span>
                    </p>
                    <p><strong>消息:</strong> <?php echo esc_html($results['connection_test']['message']); ?></p>
                    <p><strong>响应时间:</strong> <?php echo $results['connection_test']['response_time']; ?>ms</p>
                </div>
                
                <h3>内容生成测试</h3>
                <div class="test-item">
                    <p><strong>状态:</strong> 
                        <span class="status-<?php echo $results['generation_test']['status']; ?>">
                            <?php echo $results['generation_test']['status'] === 'success' ? '✅ 成功' : '❌ 失败'; ?>
                        </span>
                    </p>
                    <p><strong>消息:</strong> <?php echo esc_html($results['generation_test']['message']); ?></p>
                    <p><strong>响应时间:</strong> <?php echo $results['generation_test']['response_time']; ?>ms</p>
                    
                    <?php if (isset($results['generation_test']['generated_content'])): ?>
                        <h4>生成的内容:</h4>
                        <div class="generated-content">
                            <p><strong>标题:</strong> <?php echo esc_html($results['generation_test']['generated_content']['title']); ?></p>
                            <p><strong>描述:</strong> <?php echo esc_html($results['generation_test']['generated_content']['description']); ?></p>
                            <p><strong>关键词:</strong> <?php echo esc_html($results['generation_test']['generated_content']['keywords']); ?></p>
                        </div>
                    <?php endif; ?>
                </div>
            </div>
            
            <div class="system-info">
                <h3>系统信息</h3>
                <table class="widefat">
                    <tbody>
                        <tr><td>WordPress版本</td><td><?php echo $results['system_info']['wordpress_version']; ?></td></tr>
                        <tr><td>PHP版本</td><td><?php echo $results['system_info']['php_version']; ?></td></tr>
                        <tr><td>cURL支持</td><td><?php echo $results['system_info']['curl_enabled'] ? '✅ 是' : '❌ 否'; ?></td></tr>
                        <tr><td>JSON支持</td><td><?php echo $results['system_info']['json_enabled'] ? '✅ 是' : '❌ 否'; ?></td></tr>
                        <tr><td>内存限制</td><td><?php echo $results['system_info']['memory_limit']; ?></td></tr>
                        <tr><td>执行时间限制</td><td><?php echo $results['system_info']['max_execution_time']; ?>秒</td></tr>
                    </tbody>
                </table>
            </div>
            
            <div class="plugin-info">
                <h3>插件信息</h3>
                <table class="widefat">
                    <tbody>
                        <tr><td>插件版本</td><td><?php echo $results['plugin_info']['plugin_version']; ?></td></tr>
                        <tr><td>API Key配置</td><td><?php echo $results['plugin_info']['api_key_configured'] ? '✅ 已配置' : '❌ 未配置'; ?></td></tr>
                        <tr><td>API URL配置</td><td><?php echo $results['plugin_info']['api_url_configured'] ? '✅ 已配置' : '❌ 未配置'; ?></td></tr>
                        <tr><td>数据库版本</td><td><?php echo $results['plugin_info']['database_version']; ?></td></tr>
                    </tbody>
                </table>
            </div>
        </div>
        
        <style>
        .ai-seo-test-report {
            background: white;
            padding: 20px;
            border: 1px solid #ddd;
            border-radius: 8px;
            margin: 20px 0;
        }
        .test-summary {
            background: #f9f9f9;
            padding: 15px;
            border-radius: 5px;
            margin-bottom: 20px;
        }
        .test-item {
            background: #f9f9f9;
            padding: 15px;
            border-radius: 5px;
            margin-bottom: 15px;
        }
        .status-success {
            color: #28a745;
            font-weight: bold;
        }
        .status-error {
            color: #dc3545;
            font-weight: bold;
        }
        .generated-content {
            background: #e9ecef;
            padding: 10px;
            border-radius: 4px;
            margin-top: 10px;
        }
        .widefat td {
            padding: 8px 12px;
        }
        </style>
        <?php
        
        return ob_get_clean();
    }
}

// 如果是AJAX请求，返回JSON结果
if (defined('DOING_AJAX') && DOING_AJAX && isset($_POST['action']) && $_POST['action'] === 'ai_seo_run_test') {
    $tester = new AiSeoApiTest();
    $results = $tester->run_full_test();
    wp_send_json($results);
}

?>