🤖 How to Integrate AI into WordPress 6.9 with PHP 8.3

<?php
namespace AIWordPress\Services;

use OpenAI;
use Psr\Log\LoggerInterface;
use Symfony\Component\Cache\Adapter\RedisAdapter;

class OpenAIService {
    private string $apiKey;
    private $client;
    private LoggerInterface $logger;
    private $cache;
    private array $config;
    
    public function __construct(array $config) {
        $this->config = $config;
        $this->apiKey = $this->decryptKey($config['api_key']);
        $this->client = OpenAI::client($this->apiKey);
        $this->logger = wc_get_logger(); // WordPress logger
        $this->initCache();
    }
    
    private function initCache(): void {
        $redis = new \Redis();
        $redis->connect('127.0.0.1', 6379);
        $this->cache = new RedisAdapter($redis);
    }
    
    private function decryptKey(string $encryptedKey): string {
        // Use WordPress salts for encryption
        $key = defined('AI_ENCRYPTION_KEY') ? AI_ENCRYPTION_KEY : SECURE_AUTH_KEY;
        return openssl_decrypt(
            base64_decode($encryptedKey),
            'AES-256-CBC',
            $key,
            0,
            substr(SECURE_AUTH_SALT, 0, 16)
        );
    }
    
    public function generateContent(array $params): array {
        $cacheKey = 'ai_content_' . md5(serialize($params));
        $cached = $this->cache->getItem($cacheKey);
        
        if ($cached->isHit()) {
            $this->logger->info('AI content cache hit', ['params' => $params]);
            return $cached->get();
        }
        
        try {
            $startTime = microtime(true);
            
            $response = $this->client->chat()->create([
                'model' => $this->config['model'] ?? 'gpt-4-turbo-preview',
                'messages' => [
                    ['role' => 'system', 'content' => $params['system_prompt'] ?? ''],
                    ['role' => 'user', 'content' => $params['prompt']]
                ],
                'temperature' => $params['temperature'] ?? 0.7,
                'max_tokens' => $params['max_tokens'] ?? 2000,
                'top_p' => $params['top_p'] ?? 1,
                'frequency_penalty' => $params['frequency_penalty'] ?? 0,
                'presence_penalty' => $params['presence_penalty'] ?? 0,
            ]);
            
            $executionTime = microtime(true) - $startTime;
            $this->logger->info('AI generation completed', ['time' => $executionTime]);
            
            $result = [
                'content' => $response->choices[0]->message->content,
                'usage' => [
                    'prompt_tokens' => $response->usage->promptTokens,
                    'completion_tokens' => $response->usage->completionTokens,
                    'total_tokens' => $response->usage->totalTokens
                ],
                'model' => $response->model
            ];
            
            // Cache for 1 hour
            $cached->set($result)->expiresAfter(3600);
            $this->cache->save($cached);
            
            return $result;
            
        } catch (\Exception $e) {
            $this->logger->error('OpenAI API error', [
                'message' => $e->getMessage(),
                'params' => $params
            ]);
            
            return [
                'error' => true,
                'message' => 'AI generation failed: ' . $e->getMessage()
            ];
        }
    }
    
    public function streamContent(array $params, callable $callback): void {
        // Streaming for real-time responses
        $stream = $this->client->chat()->createStreamed([
            'model' => $this->config['model'] ?? 'gpt-4-turbo-preview',
            'messages' => [
                ['role' => 'system', 'content' => $params['system_prompt'] ?? ''],
                ['role' => 'user', 'content' => $params['prompt']]
            ],
            'temperature' => $params['temperature'] ?? 0.7,
        ]);
        
        foreach ($stream as $response) {
            $callback($response->choices[0]->delta->content ?? '');
        }
    }
}

<?php
namespace AIWordPress\Content;

use AIWordPress\Services\OpenAIService;

class ContentGenerator {
    private OpenAIService $ai;
    private array $templates;
    
    public function __construct(OpenAIService $ai) {
        $this->ai = $ai;
        $this->initTemplates();
    }
    
    private function initTemplates(): void {
        $this->templates = [
            'blog-post' => [
                'name' => 'SEO Blog Post',
                'system_prompt' => 'You are an expert content writer. Create detailed, well-researched blog posts with proper structure, headings, and SEO optimization.',
                'structure' => [
                    'title', 'meta_description', 'introduction', 'headings', 'conclusion', 'faq'
                ]
            ],
            'product-description' => [
                'name' => 'Product Description',
                'system_prompt' => 'You are a persuasive copywriter. Create compelling product descriptions that highlight features, benefits, and drive conversions.',
                'structure' => [
                    'title', 'short_description', 'features', 'benefits', 'specifications'
                ]
            ],
            'landing-page' => [
                'name' => 'Landing Page',
                'system_prompt' => 'You are a conversion copywriter. Create high-converting landing page content with strong headlines, benefits, and CTAs.',
                'structure' => [
                    'headline', 'subheadline', 'value_proposition', 'benefits', 'testimonials', 'cta'
                ]
            ]
        ];
    }
    
    public function generateContent(array $params): array {
        $template = $this->templates[$params['template']] ?? $this->templates['blog-post'];
        
        // Build structured prompt
        $prompt = $this->buildPrompt($params['topic'], $template, $params);
        
        // Generate with AI
        $result = $this->ai->generateContent([
            'system_prompt' => $template['system_prompt'],
            'prompt' => $prompt,
            'temperature' => $params['creativity'] ?? 0.7,
            'max_tokens' => $params['length'] ?? 3000
        ]);
        
        if (isset($result['error'])) {
            return $result;
        }
        
        // Parse and structure content
        $structured = $this->parseContent($result['content'], $template['structure']);
        
        // Generate SEO metadata
        $seo = $this->generateSEO($params['topic'], $structured);
        
        // Create WordPress post
        $postId = $this->createPost($structured, $seo, $params);
        
        return [
            'post_id' => $postId,
            'content' => $structured,
            'seo' => $seo,
            'usage' => $result['usage']
        ];
    }
    
    private function buildPrompt(string $topic, array $template, array $params): string {
        $prompt = "Topic: {$topic}\n\n";
        
        if (!empty($params['keywords'])) {
            $prompt .= "Target Keywords: " . implode(', ', $params['keywords']) . "\n\n";
        }
        
        if (!empty($params['tone'])) {
            $prompt .= "Tone: {$params['tone']}\n\n";
        }
        
        if (!empty($params['target_audience'])) {
            $prompt .= "Target Audience: {$params['target_audience']}\n\n";
        }
        
        $prompt .= "Please structure the content with these sections:\n";
        $prompt .= "- " . implode("\n- ", $template['structure']) . "\n\n";
        
        $prompt .= "Make it engaging, informative, and optimized for search engines.";
        
        return $prompt;
    }
    
    private function parseContent(string $content, array $structure): array {
        $parsed = [];
        $currentSection = '';
        
        foreach (explode("\n", $content) as $line) {
            foreach ($structure as $section) {
                if (stripos($line, $section . ':') === 0 || stripos($line, '## ' . $section) === 0) {
                    $currentSection = $section;
                    $parsed[$section] = '';
                    continue 2;
                }
            }
            
            if ($currentSection) {
                $parsed[$currentSection] .= $line . "\n";
            }
        }
        
        return $parsed;
    }
    
    private function generateSEO(string $topic, array $content): array {
        $seoPrompt = "Generate SEO metadata for content about '{$topic}'. Include:\n";
        $seoPrompt .= "- Meta title (max 60 chars)\n";
        $seoPrompt .= "- Meta description (max 160 chars)\n";
        $seoPrompt .= "- Focus keyword\n";
        $seoPrompt .= "- 5 related keywords\n";
        $seoPrompt .= "- URL slug suggestion";
        
        $result = $this->ai->generateContent([
            'system_prompt' => 'You are an SEO expert. Generate optimized metadata.',
            'prompt' => $seoPrompt,
            'temperature' => 0.3
        ]);
        
        // Parse SEO response
        return $this->parseSEO($result['content']);
    }
    
    private function createPost(array $content, array $seo, array $params): int {
        $postData = [
            'post_title' => $seo['title'] ?? $params['topic'],
            'post_content' => $this->formatContent($content),
            'post_status' => $params['status'] ?? 'draft',
            'post_type' => $params['post_type'] ?? 'post',
            'post_author' => get_current_user_id(),
            'meta_input' => [
                '_ai_generated' => true,
                '_ai_prompt' => $params['topic'],
                '_yoast_wpseo_title' => $seo['title'] ?? '',
                '_yoast_wpseo_metadesc' => $seo['description'] ?? '',
                '_ai_focus_keyword' => $seo['focus_keyword'] ?? ''
            ]
        ];
        
        return wp_insert_post($postData);
    }
    
    private function formatContent(array $content): string {
        $formatted = '';
        
        foreach ($content as $section => $text) {
            if (trim($text)) {
                $formatted .= "\n
" . ucfirst($section) . "
\n\n\n";
                $formatted .= "\n
" . trim($text) . "
\n\n\n";
            }
        }
        
        return $formatted;
    }
}

<?php
namespace AIWordPress\Chatbot;

use AIWordPress\Services\OpenAIService;

class SmartChatbot {
    private OpenAIService $ai;
    private string $table;
    
    public function __construct(OpenAIService $ai) {
        global $wpdb;
        $this->ai = $ai;
        $this->table = $wpdb->prefix . 'ai_chat_sessions';
        $this->initDatabase();
        $this->registerHooks();
    }
    
    private function initDatabase(): void {
        global $wpdb;
        
        $charset_collate = $wpdb->get_charset_collate();
        
        $sql = "CREATE TABLE IF NOT EXISTS {$this->table} (
            id bigint(20) NOT NULL AUTO_INCREMENT,
            session_id varchar(64) NOT NULL,
            user_id bigint(20),
            messages longtext NOT NULL,
            context longtext,
            created_at datetime DEFAULT CURRENT_TIMESTAMP,
            updated_at datetime DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
            PRIMARY KEY (id),
            KEY session_id (session_id),
            KEY user_id (user_id)
        ) $charset_collate;";
        
        require_once ABSPATH . 'wp-admin/includes/upgrade.php';
        dbDelta($sql);
    }
    
    private function registerHooks(): void {
        add_action('wp_ajax_ai_chat_message', [$this, 'handleAjaxMessage']);
        add_action('wp_ajax_nopriv_ai_chat_message', [$this, 'handleAjaxMessage']);
        add_shortcode('ai_chatbot', [$this, 'renderChatbot']);
        add_action('wp_enqueue_scripts', [$this, 'enqueueScripts']);
    }
    
    public function renderChatbot($atts): string {
        $atts = shortcode_atts([
            'title' => 'AI Assistant',
            'theme' => 'light',
            'position' => 'bottom-right'
        ], $atts);
        
        $sessionId = $this->getOrCreateSession();
        
        ob_start();
        ?>
        <div class="ai-chatbot-container" data-theme="<?php echo esc_attr($atts['theme']); ?>" 
             data-position="<?php echo esc_attr($atts['position']); ?>">
            <div class="chatbot-header">
                <h3><?php echo esc_html($atts['title']); ?></h3>
                <button class="chatbot-toggle">×</button>
            </div>
            <div class="chatbot-messages">
                <div class="message bot">
                    Hello! How can I help you today?
                </div>
            </div>
            <div class="chatbot-input">
                <textarea placeholder="Type your message..." rows="1"></textarea>
                <button class="send-message">Send</button>
            </div>
            <input type="hidden" class="session-id" value="<?php echo esc_attr($sessionId); ?>">
        </div>
        <?php
        return ob_get_clean();
    }
    
    public function handleAjaxMessage(): void {
        check_ajax_referer('ai_chat_nonce', 'nonce');
        
        $message = sanitize_textarea_field($_POST['message']);
        $sessionId = sanitize_text_field($_POST['session_id']);
        $context = $this->getWordPressContext();
        
        // Get conversation history
        $history = $this->getConversationHistory($sessionId);
        
        // Build messages array
        $messages = $this->buildMessages($history, $message, $context);
        
        // Stream response
        header('Content-Type: text/event-stream');
        header('Cache-Control: no-cache');
        
        $this->ai->streamContent([
            'messages' => $messages,
            'temperature' => 0.7
        ], function($chunk) {
            echo "data: " . json_encode(['content' => $chunk]) . "\n\n";
            ob_flush();
            flush();
        });
        
        // Save to database after streaming
        $this->saveMessage($sessionId, 'user', $message);
        // Note: In production, capture the complete response
    }
    
    private function getWordPressContext(): array {
        $context = [];
        
        if (is_single()) {
            $post = get_queried_object();
            $context['current_post'] = [
                'title' => get_the_title(),
                'content' => wp_trim_words(get_the_content(), 100),
                'categories' => wp_get_post_categories($post->ID, ['fields' => 'names'])
            ];
        }
        
        if (is_user_logged_in()) {
            $user = wp_get_current_user();
            $context['user'] = [
                'name' => $user->display_name,
                'role' => implode(', ', $user->roles)
            ];
        }
        
        $context['site'] = [
            'name' => get_bloginfo('name'),
            'description' => get_bloginfo('description'),
            'url' => home_url()
        ];
        
        return $context;
    }
    
    private function buildMessages(array $history, string $currentMessage, array $context): array {
        $messages = [
            ['role' => 'system', 'content' => $this->getSystemPrompt($context)]
        ];
        
        // Add conversation history (last 10 messages)
        $recentHistory = array_slice($history, -10);
        foreach ($recentHistory as $msg) {
            $messages[] = [
                'role' => $msg['role'],
                'content' => $msg['content']
            ];
        }
        
        // Add current message
        $messages[] = ['role' => 'user', 'content' => $currentMessage];
        
        return $messages;
    }
    
    private function getSystemPrompt(array $context): string {
        $prompt = "You are a helpful AI assistant for the WordPress site: {$context['site']['name']}.\n";
        $prompt .= "Site description: {$context['site']['description']}\n\n";
        
        if (!empty($context['current_post'])) {
            $prompt .= "Current page context:\n";
            $prompt .= "- User is viewing: {$context['current_post']['title']}\n";
            $prompt .= "- Page content: {$context['current_post']['content']}\n";
        }
        
        if (!empty($context['user'])) {
            $prompt .= "User context: {$context['user']['name']} ({$context['user']['role']})\n";
        }
        
        $prompt .= "\nProvide helpful, accurate responses based on this context. If you don't know something, say so.";
        
        return $prompt;
    }
    
    private function saveMessage(string $sessionId, string $role, string $content): void {
        global $wpdb;
        
        $history = $this->getConversationHistory($sessionId);
        $history[] = ['role' => $role, 'content' => $content, 'timestamp' => current_time('mysql')];
        
        $wpdb->update(
            $this->table,
            ['messages' => json_encode($history)],
            ['session_id' => $sessionId],
            ['%s'],
            ['%s']
        );
    }
    
    private function getConversationHistory(string $sessionId): array {
        global $wpdb;
        
        $row = $wpdb->get_row($wpdb->prepare(
            "SELECT messages FROM {$this->table} WHERE session_id = %s",
            $sessionId
        ));
        
        return $row ? json_decode($row->messages, true) : [];
    }
    
    private function getOrCreateSession(): string {
        if (isset($_COOKIE['ai_chat_session'])) {
            return sanitize_text_field($_COOKIE['ai_chat_session']);
        }
        
        $sessionId = wp_generate_uuid4();
        setcookie('ai_chat_session', $sessionId, time() + DAY_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN);
        
        $this->createSession($sessionId);
        
        return $sessionId;
    }
    
    private function createSession(string $sessionId): void {
        global $wpdb;
        
        $wpdb->insert(
            $this->table,
            [
                'session_id' => $sessionId,
                'user_id' => get_current_user_id(),
                'messages' => json_encode([]),
                'context' => json_encode($this->getWordPressContext())
            ],
            ['%s', '%d', '%s', '%s']
        );
    }
    
    public function enqueueScripts(): void {
        wp_enqueue_style('ai-chatbot-css', plugins_url('assets/css/chatbot.css', __FILE__));
        wp_enqueue_script('ai-chatbot-js', plugins_url('assets/js/chatbot.js', __FILE__), ['jquery'], '1.0', true);
        
        wp_localize_script('ai-chatbot-js', 'aiChatbot', [
            'ajax_url' => admin_url('admin-ajax.php'),
            'nonce' => wp_create_nonce('ai_chat_nonce'),
            'debug' => WP_DEBUG
        ]);
    }
}

<?php
namespace AIWordPress\Personalization;

class PersonalizationEngine {
    private $ai;
    private $userProfile = [];
    
    public function __construct($ai) {
        $this->ai = $ai;
        $this->initTracking();
    }
    
    private function initTracking(): void {
        add_action('wp', [$this, 'trackPageView']);
        add_action('wp_ajax_ai_track_event', [$this, 'trackEvent']);
        add_action('wp_ajax_nopriv_ai_track_event', [$this, 'trackEvent']);
        add_filter('the_content', [$this, 'personalizeContent'], 999);
        add_filter('wp_nav_menu_items', [$this, 'personalizeMenu'], 10, 2);
    }
    
    public function trackPageView(): void {
        if (!is_user_logged_in()) return;
        
        $userId = get_current_user_id();
        $postId = get_the_ID();
        
        $this->trackEvent([
            'user_id' => $userId,
            'post_id' => $postId,
            'event_type' => 'page_view',
            'timestamp' => current_time('mysql'),
            'data' => [
                'url' => get_permalink(),
                'title' => get_the_title(),
                'categories' => wp_get_post_categories($postId),
                'tags' => wp_get_post_tags($postId, ['fields' => 'ids']),
                'time_on_page' => 0 // Will be updated via JavaScript
            ]
        ]);
    }
    
    public function trackEvent(): void {
        $event = json_decode(file_get_contents('php://input'), true);
        
        if (!$event || !wp_verify_nonce($event['nonce'], 'ai_tracking_nonce')) {
            wp_die('Invalid request');
        }
        
        $this->saveEvent($event);
        $this->updateUserProfile($event);
        
        wp_send_json_success();
    }
    
    private function saveEvent(array $event): void {
        global $wpdb;
        $table = $wpdb->prefix . 'ai_user_events';
        
        $wpdb->insert($table, [
            'user_id' => $event['user_id'],
            'event_type' => $event['event_type'],
            'post_id' => $event['post_id'],
            'data' => json_encode($event['data']),
            'timestamp' => current_time('mysql')
        ]);
    }
    
    private function updateUserProfile(array $event): void {
        $userId = $event['user_id'];
        
        // Get existing profile
        $profile = get_user_meta($userId, 'ai_user_profile', true);
        if (!$profile) {
            $profile = [
                'interests' => [],
                'categories' => [],
                'tags' => [],
                'engagement_score' => 0,
                'preferred_time' => null,
                'content_preferences' => []
            ];
        }
        
        // Update based on event
        switch ($event['event_type']) {
            case 'page_view':
                $this->updateInterests($profile, $event);
                break;
            case 'time_spent':
                $this->updateEngagement($profile, $event);
                break;
            case 'click':
                $this->updateClickPreference($profile, $event);
                break;
            case 'purchase':
                $this->updatePurchaseHistory($profile, $event);
                break;
        }
        
        // Calculate overall engagement score
        $profile['engagement_score'] = $this->calculateEngagementScore($profile);
        
        // Generate AI-powered insights
        $profile['ai_insights'] = $this->generateInsights($profile);
        
        update_user_meta($userId, 'ai_user_profile', $profile);
    }
    
    private function updateInterests(array &$profile, array $event): void {
        if (isset($event['data']['categories'])) {
            foreach ($event['data']['categories'] as $catId) {
                if (!isset($profile['categories'][$catId])) {
                    $profile['categories'][$catId] = 0;
                }
                $profile['categories'][$catId] += 1;
            }
        }
        
        if (isset($event['data']['tags'])) {
            foreach ($event['data']['tags'] as $tagId) {
                if (!isset($profile['tags'][$tagId])) {
                    $profile['tags'][$tagId] = 0;
                }
                $profile['tags'][$tagId] += 1;
            }
        }
        
        // Keep top 20 interests
        arsort($profile['categories']);
        arsort($profile['tags']);
        $profile['categories'] = array_slice($profile['categories'], 0, 20);
        $profile['tags'] = array_slice($profile['tags'], 0, 20);
    }
    
    private function calculateEngagementScore(array $profile): float {
        $score = 0;
        
        // Weight factors
        $score += count($profile['categories']) * 2;
        $score += count($profile['tags']) * 1.5;
        $score += $profile['total_views'] ?? 0 * 0.1;
        $score += ($profile['avg_time_on_page'] ?? 0) > 60 ? 10 : 0;
        
        return min(100, $score);
    }
    
    private function generateInsights(array $profile): array {
        $prompt = "Based on this user profile, generate personalization insights:\n";
        $prompt .= "- Top interests: " . implode(', ', array_keys($profile['categories'])) . "\n";
        $prompt .= "- Engagement score: {$profile['engagement_score']}\n";
        $prompt .= "- Generate 3 content recommendations\n";
        $prompt .= "- Suggest optimal content format\n";
        $prompt .= "- Recommend best time to engage";
        
        $result = $this->ai->generateContent([
            'prompt' => $prompt,
            'temperature' => 0.3
        ]);
        
        return $result['content'] ?? [];
    }
    
    public function personalizeContent($content) {
        if (!is_singular() || !is_user_logged_in()) {
            return $content;
        }
        
        $userId = get_current_user_id();
        $profile = get_user_meta($userId, 'ai_user_profile', true);
        
        if (!$profile) {
            return $content;
        }
        
        // Get personalized recommendations
        $recommendations = $this->getRecommendations($profile);
        
        // Add personalized call-to-action
        $cta = $this->generateCTA($profile);
        
        // Insert after content
        $personalized = $content;
        $personalized .= '<div class="ai-personalized-content">';
        $personalized .= '<h3>Recommended for You</h3>';
        $personalized .= wp_kses_post($recommendations);
        $personalized .= '</div>';
        
        return $personalized;
    }
    
    private function getRecommendations(array $profile): string {
        global $wpdb;
        
        // Get top categories and tags
        $categories = array_keys($profile['categories']);
        $tags = array_keys($profile['tags']);
        
        if (empty($categories) && empty($tags)) {
            return '';
        }
        
        // Query relevant posts
        $args = [
            'post_type' => 'post',
            'posts_per_page' => 3,
            'post_status' => 'publish',
            'orderby' => 'comment_count',
            'tax_query' => []
        ];
        
        if (!empty($categories)) {
            $args['tax_query'][] = [
                'taxonomy' => 'category',
                'field' => 'term_id',
                'terms' => $categories
            ];
        }
        
        if (!empty($tags)) {
            $args['tax_query'][] = [
                'taxonomy' => 'post_tag',
                'field' => 'term_id',
                'terms' => $tags
            ];
        }
        
        $query = new WP_Query($args);
        
        if (!$query->have_posts()) {
            return '';
        }
        
        ob_start();
        echo '<ul class="ai-recommendations">';
        while ($query->have_posts()) {
            $query->the_post();
            echo '<li><a href="' . get_permalink() . '">' . get_the_title() . '</a></li>';
        }
        echo '</ul>';
        wp_reset_postdata();
        
        return ob_get_clean();
    }
    
    private function generateCTA(array $profile): string {
        $prompt = "Generate a personalized call-to-action for a user with engagement score {$profile['engagement_score']}. Make it compelling and relevant to their interests.";
        
        $result = $this->ai->generateContent([
            'prompt' => $prompt,
            'temperature' => 0.7,
            'max_tokens' => 100
        ]);
        
        return $result['content'] ?? 'Check out our latest content!';
    }
}

<?php
namespace AIWordPress\Workflow;

class WorkflowEngine {
    private $ai;
    private $triggers = [];
    private $actions = [];
    
    public function __construct($ai) {
        $this->ai = $ai;
        $this->registerDefaultTriggers();
        $this->registerDefaultActions();
        $this->initHooks();
    }
    
    private function registerDefaultTriggers(): void {
        $this->triggers = [
            'new_post' => [
                'name' => 'New Post Published',
                'callback' => [$this, 'triggerNewPost']
            ],
            'new_comment' => [
                'name' => 'New Comment Added',
                'callback' => [$this, 'triggerNewComment']
            ],
            'user_register' => [
                'name' => 'User Registered',
                'callback' => [$this, 'triggerUserRegister']
            ],
            'woocommerce_order' => [
                'name' => 'New Order',
                'callback' => [$this, 'triggerWooOrder']
            ],
            'form_submission' => [
                'name' => 'Form Submission',
                'callback' => [$this, 'triggerFormSubmission']
            ],
            'scheduled_time' => [
                'name' => 'Scheduled Time',
                'callback' => [$this, 'triggerScheduled']
            ],
            'api_webhook' => [
                'name' => 'Webhook Received',
                'callback' => [$this, 'triggerWebhook']
            ]
        ];
    }
    
    private function registerDefaultActions(): void {
        $this->actions = [
            'generate_content' => [
                'name' => 'Generate AI Content',
                'callback' => [$this, 'actionGenerateContent']
            ],
            'send_email' => [
                'name' => 'Send Email',
                'callback' => [$this, 'actionSendEmail']
            ],
            'update_post' => [
                'name' => 'Update Post',
                'callback' => [$this, 'actionUpdatePost']
            ],
            'create_post' => [
                'name' => 'Create Post',
                'callback' => [$this, 'actionCreatePost']
            ],
            'add_tag' => [
                'name' => 'Add User Tag',
                'callback' => [$this, 'actionAddTag']
            ],
            'api_request' => [
                'name' => 'External API Request',
                'callback' => [$this, 'actionApiRequest']
            ],
            'slack_notification' => [
                'name' => 'Send Slack Message',
                'callback' => [$this, 'actionSlack']
            ],
            'ai_analyze' => [
                'name' => 'AI Analyze Content',
                'callback' => [$this, 'actionAIAnalyze']
            ]
        ];
    }
    
    private function initHooks(): void {
        add_action('init', [$this, 'loadWorkflows']);
        add_action('wp_ai_process_workflow', [$this, 'processWorkflow'], 10, 2);
        add_action('admin_menu', [$this, 'addAdminMenu']);
        add_action('wp_ajax_ai_test_workflow', [$this, 'ajaxTestWorkflow']);
    }
    
    public function loadWorkflows(): void {
        $workflows = get_option('ai_workflows', []);
        
        foreach ($workflows as $workflow) {
            if ($workflow['active']) {
                $this->registerWorkflowHooks($workflow);
            }
        }
    }
    
    private function registerWorkflowHooks(array $workflow): void {
        $trigger = $workflow['trigger']['type'];
        
        switch ($trigger) {
            case 'new_post':
                add_action('save_post', function($postId, $post, $update) use ($workflow) {
                    if ($post->post_status === 'publish' && !$update) {
                        $this->maybeExecuteWorkflow($workflow, ['post_id' => $postId]);
                    }
                }, 10, 3);
                break;
                
            case 'new_comment':
                add_action('wp_insert_comment', function($commentId, $comment) use ($workflow) {
                    $this->maybeExecuteWorkflow($workflow, [
                        'comment_id' => $commentId,
                        'comment' => $comment
                    ]);
                }, 10, 2);
                break;
                
            case 'scheduled_time':
                if (!wp_next_scheduled('wp_ai_workflow_' . $workflow['id'])) {
                    wp_schedule_event(
                        strtotime($workflow['trigger']['config']['time']),
                        $workflow['trigger']['config']['interval'],
                        'wp_ai_workflow_' . $workflow['id']
                    );
                }
                add_action('wp_ai_workflow_' . $workflow['id'], function() use ($workflow) {
                    $this->executeWorkflow($workflow, ['scheduled' => true]);
                });
                break;
        }
    }
    
    private function maybeExecuteWorkflow(array $workflow, array $data): void {
        // Check conditions
        if (!$this->checkConditions($workflow['conditions'] ?? [], $data)) {
            return;
        }
        
        // Execute immediately or schedule
        if ($workflow['delay'] ?? 0 > 0) {
            wp_schedule_single_event(
                time() + $workflow['delay'],
                'wp_ai_process_workflow',
                [$workflow['id'], $data]
            );
        } else {
            $this->executeWorkflow($workflow, $data);
        }
    }
    
    private function checkConditions(array $conditions, array $data): bool {
        foreach ($conditions as $condition) {
            $value = $data[$condition['field']] ?? null;
            
            switch ($condition['operator']) {
                case 'equals':
                    if ($value != $condition['value']) return false;
                    break;
                case 'contains':
                    if (strpos($value, $condition['value']) === false) return false;
                    break;
                case 'greater_than':
                    if ($value <= $condition['value']) return false;
                    break;
                case 'less_than':
                    if ($value >= $condition['value']) return false;
                    break;
                case 'ai_match':
                    if (!$this->aiCheckMatch($value, $condition['value'])) return false;
                    break;
            }
        }
        
        return true;
    }
    
    private function aiCheckMatch($value, $criteria): bool {
        $prompt = "Check if this content matches the criteria: '{$criteria}'\n\nContent: {$value}\n\nRespond with YES or NO only.";
        
        $result = $this->ai->generateContent([
            'prompt' => $prompt,
            'temperature' => 0.1,
            'max_tokens' => 5
        ]);
        
        return stripos($result['content'], 'YES') !== false;
    }
    
    public function executeWorkflow(int $workflowId, array $data): void {
        $workflows = get_option('ai_workflows', []);
        $workflow = $workflows[$workflowId] ?? null;
        
        if (!$workflow || !$workflow['active']) {
            return;
        }
        
        // Log execution
        $this->logWorkflowExecution($workflowId, $data);
        
        // Execute actions
        foreach ($workflow['actions'] as $action) {
            try {
                $result = $this->executeAction($action['type'], $action['config'], $data);
                
                // Use result in next action if specified
                if ($action['output_key'] && $result) {
                    $data[$action['output_key']] = $result;
                }
            } catch (\Exception $e) {
                $this->logError($workflowId, $action, $e->getMessage());
                
                if ($workflow['stop_on_error']) {
                    break;
                }
            }
        }
    }
    
    private function executeAction(string $type, array $config, array $data) {
        switch ($type) {
            case 'generate_content':
                return $this->actionGenerateContent($config, $data);
                
            case 'send_email':
                return $this->actionSendEmail($config, $data);
                
            case 'update_post':
                return $this->actionUpdatePost($config, $data);
                
            case 'create_post':
                return $this->actionCreatePost($config, $data);
                
            case 'add_tag':
                return $this->actionAddTag($config, $data);
                
            case 'api_request':
                return $this->actionApiRequest($config, $data);
                
            case 'slack_notification':
                return $this->actionSlack($config, $data);
                
            case 'ai_analyze':
                return $this->actionAIAnalyze($config, $data);
                
            default:
                throw new \Exception("Unknown action type: {$type}");
        }
    }
    
    private function actionGenerateContent(array $config, array $data) {
        $prompt = $this->parseTemplate($config['prompt'], $data);
        
        $result = $this->ai->generateContent([
            'prompt' => $prompt,
            'temperature' => $config['temperature'] ?? 0.7,
            'max_tokens' => $config['max_tokens'] ?? 1000
        ]);
        
        return $result['content'];
    }
    
    private function actionSendEmail(array $config, array $data) {
        $to = $this->parseTemplate($config['to'], $data);
        $subject = $this->parseTemplate($config['subject'], $data);
        $message = $this->parseTemplate($config['message'], $data);
        
        return wp_mail($to, $subject, $message);
    }
    
    private function actionCreatePost(array $config, array $data) {
        $postData = [
            'post_title' => $this->parseTemplate($config['title'], $data),
            'post_content' => $this->parseTemplate($config['content'], $data),
            'post_status' => $config['status'] ?? 'draft',
            'post_type' => $config['post_type'] ?? 'post',
            'post_author' => $config['author'] ?? get_current_user_id()
        ];
        
        if (!empty($config['ai_generate'])) {
            $aiContent = $this->ai->generateContent([
                'prompt' => "Write a {$config['post_type']} about: " . $postData['post_title'],
                'temperature' => 0.7
            ]);
            
            $postData['post_content'] = $aiContent['content'];
        }
        
        return wp_insert_post($postData);
    }
    
    private function actionApiRequest(array $config, array $data) {
        $url = $this->parseTemplate($config['url'], $data);
        $method = $config['method'] ?? 'GET';
        $headers = $config['headers'] ?? [];
        $body = $this->parseTemplate(json_encode($config['body'] ?? []), $data);
        
        $response = wp_remote_request($url, [
            'method' => $method,
            'headers' => $headers,
            'body' => json_decode($body, true)
        ]);
        
        if (is_wp_error($response)) {
            throw new \Exception($response->get_error_message());
        }
        
        return wp_remote_retrieve_body($response);
    }
    
    private function actionSlack(array $config, array $data) {
        $message = $this->parseTemplate($config['message'], $data);
        $webhook = $config['webhook_url'];
        
        return wp_remote_post($webhook, [
            'headers' => ['Content-Type' => 'application/json'],
            'body' => json_encode(['text' => $message])
        ]);
    }
    
    private function actionAIAnalyze(array $config, array $data) {
        $content = $this->parseTemplate($config['content'], $data);
        $analysisType = $config['analysis_type'];
        
        $prompts = [
            'sentiment' => "Analyze the sentiment of this text (positive/negative/neutral): {$content}",
            'summary' => "Summarize this text in 2-3 sentences: {$content}",
            'keywords' => "Extract 5 key keywords from this text: {$content}",
            'category' => "Suggest a category for this content: {$content}",
            'spam' => "Check if this is spam (YES/NO): {$content}"
        ];
        
        $result = $this->ai->generateContent([
            'prompt' => $prompts[$analysisType] ?? $prompts['summary'],
            'temperature' => 0.3
        ]);
        
        return $result['content'];
    }
    
    private function parseTemplate(string $template, array $data): string {
        foreach ($data as $key => $value) {
            if (is_scalar($value)) {
                $template = str_replace("{{$key}}", $value, $template);
            }
        }
        return $template;
    }
    
    private function logWorkflowExecution(int $workflowId, array $data): void {
        global $wpdb;
        
        $wpdb->insert(
            $wpdb->prefix . 'ai_workflow_logs',
            [
                'workflow_id' => $workflowId,
                'data' => json_encode($data),
                'executed_at' => current_time('mysql')
            ],
            ['%d', '%s', '%s']
        );
    }
    
    public function addAdminMenu(): void {
        add_menu_page(
            'AI Workflows',
            'AI Workflows',
            'manage_options',
            'ai-workflows',
            [$this, 'renderAdminPage'],
            'dashicons-networking',
            30
        );
    }
    
    public function renderAdminPage(): void {
        ?>
        <div class="wrap">
            <h1>AI Workflows</h1>
            
            <div class="workflow-editor">
                <div class="trigger-selector">
                    <h3>When this happens...</h3>
                    <select id="trigger-type">
                        <?php foreach ($this->triggers as $key => $trigger): ?>
                            <option value="<?php echo esc_attr($key); ?>">
                                <?php echo esc_html($trigger['name']); ?>
                            </option>
                        <?php endforeach; ?>
                    </select>
                    
                    <div id="trigger-config" class="config-panel"></div>
                </div>
                
                <div class="action-builder">
                    <h3>...do this</h3>
                    <div class="actions-list">
                        <!-- Actions will be added here -->
                    </div>
                    
                    <button class="button add-action">Add Action</button>
                </div>
                
                <div class="workflow-settings">
                    <h3>Settings</h3>
                    <label>
                        <input type="checkbox" name="active"> Active
                    </label>
                    <label>
                        <input type="checkbox" name="stop_on_error"> Stop on Error
                    </label>
                </div>
                
                <button class="button button-primary save-workflow">Save Workflow</button>
            </div>
        </div>
        <?php
    }
}

<?php
namespace AIWordPress\ML;

use Phpml\Classification\KNearestNeighbors;
use Phpml\FeatureExtraction\TfIdfTransformer;
use Phpml\Tokenization\WhitespaceTokenizer;
use Phpml\FeatureExtraction\TokenCountVectorizer;

class ContentClassifier {
    private $classifier;
    private $vectorizer;
    private $transformer;
    private $trained = false;
    
    public function __construct() {
        $this->classifier = new KNearestNeighbors();
        $this->vectorizer = new TokenCountVectorizer(new WhitespaceTokenizer());
        $this->transformer = new TfIdfTransformer();
    }
    
    public function train(array $samples, array $labels): void {
        // Vectorize the samples
        $this->vectorizer->fit($samples);
        $this->vectorizer->transform($samples);
        
        // Apply TF-IDF transformation
        $this->transformer->fit($samples);
        $this->transformer->transform($samples);
        
        // Train classifier
        $this->classifier->train($samples, $labels);
        $this->trained = true;
        
        // Save model to options
        $this->saveModel();
    }
    
    public function predict(string $text): array {
        if (!$this->trained) {
            $this->loadModel();
        }
        
        $samples = [$text];
        $this->vectorizer->transform($samples);
        $this->transformer->transform($samples);
        
        $prediction = $this->classifier->predict($samples[0]);
        
        // Get probability
        $probability = $this->getPredictionProbability($text, $prediction);
        
        return [
            'category' => $prediction,
            'confidence' => $probability,
            'text' => $text
        ];
    }
    
    private function getPredictionProbability($text, $prediction): float {
        // Simple distance-based probability
        $distances = $this->classifier->getDistance($text);
        $total = array_sum($distances);
        
        return $total > 0 ? $distances[$prediction] / $total : 0;
    }
    
    private function saveModel(): void {
        $data = [
            'classifier' => serialize($this->classifier),
            'vectorizer' => serialize($this->vectorizer),
            'transformer' => serialize($this->transformer)
        ];
        
        update_option('ai_ml_content_classifier', $data);
    }
    
    private function loadModel(): void {
        $data = get_option('ai_ml_content_classifier');
        
        if ($data) {
            $this->classifier = unserialize($data['classifier']);
            $this->vectorizer = unserialize($data['vectorizer']);
            $this->transformer = unserialize($data['transformer']);
            $this->trained = true;
        }
    }
    
    public function autoClassifyPost(int $postId): void {
        $post = get_post($postId);
        
        if (!$post) {
            return;
        }
        
        $prediction = $this->predict($post->post_title . ' ' . $post->post_content);
        
        // Auto-assign category based on prediction
        if ($prediction['confidence'] > 0.6) {
            $categoryId = $this->getCategoryForLabel($prediction['category']);
            wp_set_post_categories($postId, $categoryId, true);
            
            // Log the auto-classification
            update_post_meta($postId, '_ai_auto_classified', [
                'category' => $prediction['category'],
                'confidence' => $prediction['confidence'],
                'timestamp' => current_time('mysql')
            ]);
        }
    }
    
    private function getCategoryForLabel(string $label): int {
        $map = get_option('ai_ml_category_map', []);
        return $map[$label] ?? 0;
    }
}

// Integration with WordPress
add_action('save_post', function($postId, $post, $update) {
    if ($post->post_status === 'publish' && !$update) {
        $classifier = new ContentClassifier();
        $classifier->autoClassifyPost($postId);
    }
}, 10, 3);

<?php
namespace AIWordPress\Performance;

use parallel\Runtime;
use parallel\Channel;

class AsyncAIProcessor {
    private array $runtimes = [];
    private Channel $channel;
    
    public function __construct(int $workers = 4) {
        // Create channel for communication
        $this->channel = Channel::make('ai_tasks');
        
        // Spawn worker threads
        for ($i = 0; $i < $workers; $i++) {
            $this->runtimes[] = new Runtime(__DIR__ . '/worker.php');
        }
    }
    
    public function processBatch(array $tasks): array {
        $futures = [];
        $results = [];
        
        // Distribute tasks to workers
        foreach ($tasks as $task) {
            $futures[] = $this->runtimes[array_rand($this->runtimes)]->run(
                function($task) {
                    // Worker code
                    $processor = new AITaskProcessor();
                    return $processor->execute($task);
                },
                [$task]
            );
        }
        
        // Collect results
        foreach ($futures as $future) {
            $results[] = $future->value();
        }
        
        return $results;
    }
    
    public function processStream(callable $generator): Generator {
        while ($task = $generator()) {
            // Non-blocking task processing
            $future = $this->runtimes[array_rand($this->runtimes)]->run(
                function($task) {
                    return $this->processTask($task);
                },
                [$task]
            );
            
            yield $future;
        }
    }
}

// Fiber-based async processing (PHP 8.1+)
class FiberProcessor {
    public function processWithFibers(array $tasks): array {
        $fibers = [];
        $results = [];
        
        foreach ($tasks as $key => $task) {
            $fibers[$key] = new Fiber(function() use ($task) {
                return $this->aiTask($task);
            });
            $fibers[$key]->start();
        }
        
        foreach ($fibers as $key => $fiber) {
            $results[$key] = $fiber->join();
        }
        
        return $results;
    }
}