<?php
class Post_Formatter
{
    private $api;
    private $max_length = 300;

    private function diagnose_thumbnail_support($post_id) {
        error_log('[Bluesky Connector] Starting thumbnail support diagnosis');
    
        // Check WordPress version
        error_log('[Bluesky Connector] WordPress Version: ' . get_bloginfo('version'));
    
        // Check if theme supports post thumbnails
        $theme_support = current_theme_supports('post-thumbnails');
        error_log('[Bluesky Connector] Theme supports post thumbnails: ' . ($theme_support ? 'yes' : 'no'));
    
        // If theme doesn't support thumbnails, check if we can add support
        if (!$theme_support) {
            error_log('[Bluesky Connector] Attempting to add post thumbnail support');
            add_theme_support('post-thumbnails');
            $theme_support = current_theme_supports('post-thumbnails');
            error_log('[Bluesky Connector] Post thumbnail support after attempt: ' . ($theme_support ? 'yes' : 'no'));
        }
    
        // Check post type support
        $post_type = get_post_type($post_id);
        $post_type_support = post_type_supports($post_type, 'thumbnail');
        error_log('[Bluesky Connector] Post type ' . $post_type . ' supports thumbnails: ' . ($post_type_support ? 'yes' : 'no'));
    
        // Check post meta directly
        $post_meta = get_post_meta($post_id);
        error_log('[Bluesky Connector] All post meta for debugging: ' . print_r($post_meta, true));
    
        // Check attachment status
        $thumbnail_id = get_post_thumbnail_id($post_id);
        if ($thumbnail_id) {
            $attachment = get_post($thumbnail_id);
            if ($attachment) {
                error_log('[Bluesky Connector] Attachment details: ' . print_r([
                    'ID' => $attachment->ID,
                    'post_type' => $attachment->post_type,
                    'status' => $attachment->post_status,
                    'mime_type' => $attachment->post_mime_type,
                    'attached_file' => get_attached_file($thumbnail_id),
                    'exists' => file_exists(get_attached_file($thumbnail_id))
                ], true));
            } else {
                error_log('[Bluesky Connector] Attachment post not found for ID: ' . $thumbnail_id);
            }
        }
    
        return $theme_support && $post_type_support;
    }

    public function __construct($access_token, $did)
    {
        error_log('[Bluesky Connector] Initializing Post_Formatter with DID: ' . $did);
        $this->api = new Bluesky_API($access_token, $did);
    }

    public function format_and_post($post, $formatted_content = null)
    {
        try {
            error_log('[Bluesky Connector] Starting format_and_post for post ' . $post->ID);
            
            // Use provided content if available, otherwise format it
            $content = $formatted_content ?: $this->get_formatted_content($post);
            error_log('[Bluesky Connector] Formatted content: ' . $content);

            $post_data = array(
                '$type' => 'app.bsky.feed.post',
                'text' => $content,
                'createdAt' => gmdate('c', strtotime($post->post_date_gmt)),
                'langs' => array('en')
            );

            // Add facets for the URL
            $post_data['facets'] = $this->parse_facets($post);
            error_log('[Bluesky Connector] Added facets: ' . wp_json_encode($post_data['facets']));

            // Debug thumbnail support
            error_log('[Bluesky Connector] Checking for featured image...');
            error_log('[Bluesky Connector] Post type: ' . $post->post_type);
            error_log('[Bluesky Connector] has_post_thumbnail result: ' . (has_post_thumbnail($post->ID) ? 'true' : 'false'));
            error_log('[Bluesky Connector] Theme supports thumbnails: ' . (current_theme_supports('post-thumbnails') ? 'true' : 'false'));
            error_log('[Bluesky Connector] Post thumbnail meta check:');
            error_log('[Bluesky Connector] _thumbnail_id: ' . get_post_meta($post->ID, '_thumbnail_id', true));
            error_log('[Bluesky Connector] Post status: ' . get_post_status($post->ID));

            // Handle image embed
            if (has_post_thumbnail($post->ID)) {
                error_log('[Bluesky Connector] Processing featured image for post ' . $post->ID);
                $image_data = $this->handle_featured_image($post->ID);
                if (!empty($image_data) && !isset($image_data['error'])) {
                    $post_data['embed'] = $image_data;
                    error_log('[Bluesky Connector] Image data added to post: ' . wp_json_encode($image_data));
                } else {
                    error_log('[Bluesky Connector] Image processing error: ' . ($image_data['error'] ?? 'Unknown error'));
                }
            }

            error_log('[Bluesky Connector] Sending post data to API: ' . wp_json_encode($post_data));
            $response = $this->api->create_post($post_data);
            error_log('[Bluesky Connector] API Response: ' . wp_json_encode($response));

            return $response;

        } catch (Exception $e) {
            error_log('[Bluesky Connector] Error in format_and_post: ' . $e->getMessage());
            return array('error' => $e->getMessage());
        }
    }

    private function get_formatted_content($post)
    {
        try {
            error_log('[Bluesky Connector] Starting content formatting for post ' . $post->ID);
            
            $format = get_option('bluesky_post_format', 'image-title-excerpt-link');
            $include_title = get_option('bluesky_include_title', true);

            error_log('[Bluesky Connector] Using format: ' . $format . ', Include title: ' . ($include_title ? 'yes' : 'no'));

            // Get individual components
            $title = $include_title ? $post->post_title : '';
            $excerpt = $this->get_excerpt($post);
            $url = wp_get_shortlink($post->ID);

            error_log('[Bluesky Connector] Content components:');
            error_log('[Bluesky Connector] - Title: ' . $title);
            error_log('[Bluesky Connector] - Excerpt length: ' . strlen($excerpt));
            error_log('[Bluesky Connector] - URL: ' . $url);

            // Start building content
            $content = '';

            // Add title with line break if it exists
            if (!empty($title)) {
                $content .= $title . "\n\n";
            }

            // Add excerpt if it exists
            if (!empty($excerpt)) {
                $content .= $excerpt . "\n\n";
            }

            // Add URL on its own line
            if (!empty($url)) {
                $content .= "Continue Reading: " . $url;
            }

            error_log('[Bluesky Connector] Final formatted content: ' . $content);
            return $content;

        } catch (Exception $e) {
            error_log('[Bluesky Connector] Error in get_formatted_content: ' . $e->getMessage());
            throw $e;
        }
    }

    private function get_excerpt($post)
{
    try {
        error_log('[Bluesky Connector] Getting excerpt for post ' . $post->ID);
        
        $text = wp_strip_all_tags($post->post_excerpt);
        if (empty($text)) {
            $text = wp_strip_all_tags($post->post_content);
            error_log('[Bluesky Connector] Using post content for excerpt (no excerpt found)');
        }

        $url = wp_get_shortlink($post->ID);
        $include_title = get_option('bluesky_include_title', true);
        
        // Calculate available length
        $available_length = $this->max_length;
        $available_length -= strlen($url);
        $available_length -= strlen("Continue Reading: "); // Account for the prefix
        $available_length -= 4; // Account for \n\n before and after the URL
        
        if ($include_title) {
            $available_length -= strlen($post->post_title);
            $available_length -= 2; // Account for \n\n after title
        }

        error_log('[Bluesky Connector] Available length for excerpt: ' . $available_length);

        if (mb_strlen($text) > $available_length) {
            $text = mb_substr($text, 0, $available_length - 3) . '...';
            error_log('[Bluesky Connector] Excerpt truncated to fit length limit');
        }

        error_log('[Bluesky Connector] Final excerpt length: ' . mb_strlen($text));
        return $text;

    } catch (Exception $e) {
        error_log('[Bluesky Connector] Error in get_excerpt: ' . $e->getMessage());
        throw $e;
    }
}

    private function parse_facets($post)
    {
        try {
            error_log('[Bluesky Connector] Parsing facets for post ' . $post->ID);
            
            $facets = array();
            $content = $this->get_formatted_content($post);
            $url = wp_get_shortlink($post->ID);
            $text_bytes = mb_convert_encoding($content, 'UTF-8');
            $url_position = mb_strrpos($text_bytes, $url);

            if ($url_position !== false) {
                $facets[] = array(
                    'index' => array(
                        'byteStart' => $url_position,
                        'byteEnd' => $url_position + strlen($url),
                    ),
                    'features' => array(
                        array(
                            '$type' => 'app.bsky.richtext.facet#link',
                            'uri' => $url,
                        ),
                    ),
                );
                error_log('[Bluesky Connector] Added URL facet for: ' . $url);
            }

            error_log('[Bluesky Connector] Generated facets: ' . wp_json_encode($facets));
            return $facets;

        } catch (Exception $e) {
            error_log('[Bluesky Connector] Error in parse_facets: ' . $e->getMessage());
            throw $e;
        }
    }
    
    private function handle_featured_image($post_id) {
        try {
            error_log('[Bluesky Connector] Starting featured image process for post ' . $post_id);
            
            // Run diagnostics first
            $thumbnail_support = $this->diagnose_thumbnail_support($post_id);
            if (!$thumbnail_support) {
                error_log('[Bluesky Connector] Thumbnail support is not properly configured');
            }
    
            // Get image ID with multiple fallbacks
            $image_id = get_post_thumbnail_id($post_id);
            error_log('[Bluesky Connector] Initial image ID from get_post_thumbnail_id: ' . $image_id);
            
            if (!$image_id) {
                // Try direct meta approach
                $image_id = get_post_meta($post_id, '_thumbnail_id', true);
                error_log('[Bluesky Connector] Image ID from direct meta: ' . $image_id);
                
                // If still no image, check for fallback
                if (!$image_id) {
                    $image_id = get_option('bluesky_fallback_image');
                    error_log('[Bluesky Connector] Using fallback image ID: ' . $image_id);
                }
            }
    
            if (!$image_id) {
                return array('error' => 'No valid image ID found');
            }
    
            // Get the image file path
            $image_path = get_attached_file($image_id);
            error_log('[Bluesky Connector] Image path: ' . ($image_path ?: 'not found'));
    
            // Verify file exists and is accessible
            if (!$image_path || !file_exists($image_path)) {
                $upload_dir = wp_upload_dir();
                error_log('[Bluesky Connector] Upload directory information: ' . print_r($upload_dir, true));
                return array('error' => 'Image file not found or inaccessible');
            }
    
            // Check file permissions
            error_log('[Bluesky Connector] File permissions: ' . decoct(fileperms($image_path) & 0777));
    
            // Verify mime type
            $mime_type = get_post_mime_type($image_id);
            error_log('[Bluesky Connector] Mime type: ' . $mime_type);
    
            // Validate mime type
            $allowed_types = array('image/jpeg', 'image/png', 'image/gif');
            if (!in_array($mime_type, $allowed_types)) {
                return array('error' => 'Unsupported image type: ' . $mime_type);
            }
    
            // Get image data
            $image_data = file_get_contents($image_path);
            if ($image_data === false) {
                return array('error' => 'Failed to read image file');
            }
    
            // Check and handle file size
            $size = strlen($image_data);
            error_log('[Bluesky Connector] Original image size: ' . $size . ' bytes');
            
            if ($size > 1000000) {
                error_log('[Bluesky Connector] Image exceeds size limit, attempting resize');
                $resized = $this->resize_image($image_path);
                
                if ($resized) {
                    error_log('[Bluesky Connector] Image resized successfully');
                    $image_path = $resized;
                    
                    // Verify new size
                    $new_size = filesize($resized);
                    error_log('[Bluesky Connector] New image size: ' . $new_size . ' bytes');
                    
                    if ($new_size > 1000000) {
                        error_log('[Bluesky Connector] Resized image still too large');
                        return array('error' => 'Unable to reduce image size below 1MB');
                    }
                } else {
                    error_log('[Bluesky Connector] Image resize failed');
                    return array('error' => 'Image resize failed');
                }
            }
    
            // Upload to Bluesky
            error_log('[Bluesky Connector] Uploading image to Bluesky');
            $response = $this->api->upload_blob($image_path, $mime_type);
    
            if (isset($response['error'])) {
                error_log('[Bluesky Connector] Upload failed: ' . $response['error']);
                return $response;
            }
    
            // Clean up temporary file if it exists
            if (isset($resized) && file_exists($resized)) {
                unlink($resized);
                error_log('[Bluesky Connector] Cleaned up temporary resized file');
            }
    
            // Get alt text
            $alt_text = get_post_meta($image_id, '_wp_attachment_image_alt', true) ?: '';
            error_log('[Bluesky Connector] Using alt text: ' . $alt_text);
    
            // Prepare final image embed
            $image_embed = array(
                '$type' => 'app.bsky.embed.images',
                'images' => array(
                    array(
                        'alt' => $alt_text,
                        'image' => $response['blob'],
                    ),
                ),
            );
    
            error_log('[Bluesky Connector] Image embed prepared successfully');
            return $image_embed;
    
        } catch (Exception $e) {
            error_log('[Bluesky Connector] Error in handle_featured_image: ' . $e->getMessage());
            error_log('[Bluesky Connector] Stack trace: ' . $e->getTraceAsString());
            return array('error' => $e->getMessage());
        }
    }

    private function resize_image($image_path)
    {
        try {
            error_log('[Bluesky Connector] Starting image resize for: ' . $image_path);
            
            if (!function_exists('imagecreatefrompng')) {
                error_log('[Bluesky Connector] GD library not available');
                return false;
            }

            $mime_type = mime_content_type($image_path);
            list($width, $height) = getimagesize($image_path);
            error_log('[Bluesky Connector] Original dimensions: ' . $width . 'x' . $height);

            // Calculate new dimensions
            $max_dimension = 1000;
            if ($width > $height) {
                $new_width = $max_dimension;
                $new_height = floor($height * ($max_dimension / $width));
            } else {
                $new_height = $max_dimension;
                $new_width = floor($width * ($max_dimension / $height));
            }

            error_log('[Bluesky Connector] New dimensions: ' . $new_width . 'x' . $new_height);

            $new_image = imagecreatetruecolor($new_width, $new_height);
            
            switch ($mime_type) {
                case 'image/jpeg':
                    $source = imagecreatefromjpeg($image_path);
                    break;
                case 'image/png':
                    $source = imagecreatefrompng($image_path);
                    imagealphablending($new_image, false);
                    imagesavealpha($new_image, true);
                    break;
                case 'image/gif':
                    $source = imagecreatefromgif($image_path);
                    break;
                default:
                    error_log('[Bluesky Connector] Unsupported image type: ' . $mime_type);
                    return false;
            }

            if (!$source) {
                error_log('[Bluesky Connector] Failed to create image resource');
                return false;
            }

            imagecopyresampled(
                $new_image,
                $source,
                0, 0, 0, 0,
                $new_width,
                $new_height,
                $width,
                $height
            );

            // Use PHP's tempnam
            $temp_file = tempnam(sys_get_temp_dir(), 'bluesky_img_');
            error_log('[Bluesky Connector] Created temp file: ' . $temp_file);

            $success = false;
            switch ($mime_type) {
                case 'image/jpeg':
                    $success = imagejpeg($new_image, $temp_file, 85);
                    break;
                case 'image/png':
                    $success = imagepng($new_image, $temp_file, 8);
                    break;
                case 'image/gif':
                    $success = imagegif($new_image, $temp_file);
                    break;
            }

            imagedestroy($source);
            imagedestroy($new_image);

            if ($success) {
                error_log('[Bluesky Connector] Image resized successfully');
                return $temp_file;
            } else {
                error_log('[Bluesky Connector] Failed to save resized image');
                return false;
            }

        } catch (Exception $e) {
            error_log('[Bluesky Connector] Error in resize_image: ' . $e->getMessage());
            return false;
        }
    }
}