<?php
/**
 * Template Helper Functions
 *
 * Helper functions for IGNY8 content template
 *
 * @package Igny8Bridge
 */

// Prevent direct access
if (!defined('ABSPATH')) {
    exit;
}

/**
 * Parse content HTML into intro and H2 sections
 *
 * @param string $content HTML content
 * @return array ['intro' => string, 'sections' => array]
 */
function igny8_parse_content_sections($content) {
    if (empty($content)) {
        return ['intro' => '', 'sections' => []];
    }
    
    // Use DOMDocument to parse HTML
    $dom = new DOMDocument('1.0', 'UTF-8');
    libxml_use_internal_errors(true);
    
    // Load HTML with proper encoding
    $dom->loadHTML('<?xml encoding="UTF-8">' . $content, LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD);
    libxml_clear_errors();
    
    $intro_html = '';
    $sections = [];
    $current_section = null;
    
    // Get body node
    $body = $dom->getElementsByTagName('body')->item(0);
    if (!$body) {
        return ['intro' => $content, 'sections' => []];
    }
    
    // Iterate through all child nodes
    foreach ($body->childNodes as $node) {
        // Check if node is an H2 heading
        if ($node->nodeName === 'h2') {
            // Save previous section if exists
            if ($current_section !== null) {
                $sections[] = $current_section;
            }
            
            // Start new section
            $current_section = [
                'heading' => trim($node->textContent),
                'content' => '',
                'id' => sanitize_title($node->textContent)
            ];
        } elseif ($current_section !== null) {
            // Add to current section
            $current_section['content'] .= $dom->saveHTML($node);
        } else {
            // Add to intro (before first H2)
            $intro_html .= $dom->saveHTML($node);
        }
    }
    
    // Save last section
    if ($current_section !== null) {
        $sections[] = $current_section;
    }
    
    return [
        'intro' => trim($intro_html),
        'sections' => $sections
    ];
}

/**
 * Get in-article images from imported images meta
 *
 * @param int $post_id Post ID
 * @return array Indexed array of image data by position
 */
function igny8_get_in_article_images($post_id) {
    $imported_images = get_post_meta($post_id, '_igny8_imported_images', true);
    
    if (empty($imported_images) || !is_array($imported_images)) {
        return [];
    }
    
    $in_article_images = [];
    
    foreach ($imported_images as $img) {
        // Skip featured images
        if (isset($img['is_featured']) && $img['is_featured']) {
            continue;
        }
        
        $position = isset($img['position']) ? (int)$img['position'] : count($in_article_images) + 1;
        $in_article_images[$position] = $img;
    }
    
    return $in_article_images;
}

/**
 * Get featured image prompt from imported images meta
 *
 * @param int $post_id Post ID
 * @return string|null Image prompt or null
 */
function igny8_get_featured_image_prompt($post_id) {
    $imported_images = get_post_meta($post_id, '_igny8_imported_images', true);
    
    if (empty($imported_images) || !is_array($imported_images)) {
        return null;
    }
    
    foreach ($imported_images as $img) {
        if (isset($img['is_featured']) && $img['is_featured'] && isset($img['prompt'])) {
            return $img['prompt'];
        }
    }
    
    return null;
}

/**
 * Format status label for display
 *
 * @param string $status Post status
 * @return string Formatted label
 */
function igny8_format_status_label($status) {
    $labels = [
        'draft' => 'Draft',
        'pending' => 'Pending Review',
        'publish' => 'Published',
        'private' => 'Private',
        'future' => 'Scheduled',
        'trash' => 'Trash'
    ];
    
    return isset($labels[$status]) ? $labels[$status] : ucfirst($status);
}

/**
 * Get status CSS class
 *
 * @param string $status Post status
 * @return string CSS class
 */
function igny8_get_status_class($status) {
    $classes = [
        'draft' => 'igny8-status-draft',
        'pending' => 'igny8-status-pending',
        'publish' => 'igny8-status-publish',
        'private' => 'igny8-status-private',
        'future' => 'igny8-status-future'
    ];
    
    return isset($classes[$status]) ? $classes[$status] : 'igny8-status-default';
}

/**
 * Calculate word count from content
 *
 * @param string $content HTML content
 * @return int Word count
 */
function igny8_calculate_word_count($content) {
    if (empty($content)) {
        return 0;
    }
    
    // Strip HTML tags and count words
    $text = wp_strip_all_tags($content);
    return str_word_count($text);
}

/**
 * Parse secondary keywords from meta
 *
 * @param string $keywords Comma-separated keywords
 * @return array Array of keywords
 */
function igny8_parse_keywords($keywords) {
    if (empty($keywords)) {
        return [];
    }
    
    // Split by comma and trim each keyword
    $keywords_array = array_map('trim', explode(',', $keywords));
    
    // Remove empty values
    return array_filter($keywords_array);
}