<?php

class MetadataExtractor
{
    public static function extractAllMetadata($asset)
    {
        $metadata = [];
        
        // Basic asset information
        $metadata['basic'] = [
            'asset_id' => $asset['asset_id'] ?? null,
            'name' => $asset['name'] ?? null,
            'data_type' => $asset['data_type'] ?? null,
            'mime_type' => $asset['mime_type'] ?? null,
            'file_size' => $asset['file_size'] ?? null,
            'creator_id' => $asset['creator_id'] ?? null,
            'date_imported' => $asset['date_imported'] ?? null,
            'date_last_updated' => $asset['date_last_updated'] ?? null,
            'version' => $asset['version'] ?? null,
            'locked' => $asset['locked'] ?? null,
            'asset_state' => $asset['asset_state'] ?? null
        ];

        // Content information
        if (isset($asset['asset_content_info']['master_content'])) {
            $content = $asset['asset_content_info']['master_content'];
            $metadata['content'] = [
                'content_file_name' => $content['content_file_name'] ?? null,
                'content_size' => $content['content_size'] ?? null,
                'mime_type' => $content['mime_type'] ?? null,
                'width' => $content['width'] ?? null,
                'height' => $content['height'] ?? null,
                'content_checksum' => $content['content_checksum'] ?? null,
                'encoding' => $content['encoding'] ?? null,
                'content_signed_url' => $content['content_signed_url'] ?? null,
                'url' => $content['url'] ?? null
            ];
        }

        // Custom metadata fields
        $metadata['custom_fields'] = [];
        if (isset($asset['metadata']['metadata_element_list'])) {
            foreach ($asset['metadata']['metadata_element_list'] as $category) {
                $categoryName = $category['name'] ?? 'Unknown Category';
                $metadata['custom_fields'][$categoryName] = [];
                
                if (isset($category['metadata_element_list'])) {
                    foreach ($category['metadata_element_list'] as $field) {
                        $fieldId = $field['id'] ?? 'unknown';
                        $fieldName = $field['name'] ?? $fieldId;
                        $fieldValue = null;
                        
                        // Extract field value
                        if (isset($field['value']['value']['value'])) {
                            $fieldValue = $field['value']['value']['value'];
                        } elseif (isset($field['value']['value']['display_value'])) {
                            $fieldValue = $field['value']['value']['display_value'];
                        } elseif (isset($field['value']['value']['field_value']['value'])) {
                            $fieldValue = $field['value']['value']['field_value']['value'];
                        }
                        
                        // Handle tabular fields
                        if (isset($field['metadata_element_list'])) {
                            $tabularValues = [];
                            foreach ($field['metadata_element_list'] as $tableField) {
                                if (isset($tableField['values'])) {
                                    foreach ($tableField['values'] as $value) {
                                        if (isset($value['value']['value'])) {
                                            $tabularValues[] = $value['value']['value'];
                                        } elseif (isset($value['value']['display_value'])) {
                                            $tabularValues[] = $value['value']['display_value'];
                                        }
                                    }
                                }
                            }
                            if (!empty($tabularValues)) {
                                $fieldValue = $tabularValues;
                            }
                        }
                        
                        if ($fieldValue !== null) {
                            $metadata['custom_fields'][$categoryName][$fieldName] = [
                                'id' => $fieldId,
                                'value' => $fieldValue,
                                'data_type' => $field['data_type'] ?? null,
                                'editable' => $field['editable'] ?? null,
                                'required' => $field['required'] ?? null
                            ];
                        }
                    }
                }
            }
        }

        // Permissions
        $metadata['permissions'] = [];
        if (isset($asset['access_control_descriptor']['permissions_map']['entry'])) {
            foreach ($asset['access_control_descriptor']['permissions_map']['entry'] as $permission) {
                $permissionName = str_replace('text.securityPolicy.permission.', '', $permission['key'] ?? '');
                $metadata['permissions'][$permissionName] = $permission['value'] ?? false;
            }
        }

        // Renditions and previews
        $metadata['renditions'] = [];
        if (isset($asset['rendition_content'])) {
            foreach ($asset['rendition_content'] as $renditionType => $rendition) {
                if (is_array($rendition)) {
                    $metadata['renditions'][$renditionType] = [
                        'content_size' => $rendition['content_size'] ?? null,
                        'mime_type' => $rendition['mime_type'] ?? null,
                        'width' => $rendition['width'] ?? null,
                        'height' => $rendition['height'] ?? null,
                        'url' => $rendition['url'] ?? null,
                        'content_signed_url' => $rendition['content_signed_url'] ?? null
                    ];
                }
            }
        }

        return $metadata;
    }

    public static function formatMetadataForDisplay($metadata)
    {
        $output = "<div class='metadata-display'>";
        
        // Basic Information
        if (!empty($metadata['basic'])) {
            $output .= "<div class='metadata-section'>";
            $output .= "<h5>📋 Basic Asset Information</h5>";
            $output .= "<div class='metadata-grid'>";
            
            foreach ($metadata['basic'] as $key => $value) {
                if ($value !== null) {
                    $displayKey = ucwords(str_replace('_', ' ', $key));
                    $displayValue = is_bool($value) ? ($value ? 'Yes' : 'No') : htmlspecialchars($value);
                    $output .= "<div><strong>{$displayKey}:</strong> {$displayValue}</div>";
                }
            }
            $output .= "</div></div>";
        }

        // Content Information
        if (!empty($metadata['content'])) {
            $output .= "<div class='metadata-section'>";
            $output .= "<h5>🖼️ Content Information</h5>";
            $output .= "<div class='metadata-grid'>";
            
            foreach ($metadata['content'] as $key => $value) {
                if ($value !== null && $key !== 'content_signed_url') { // Hide signed URL for security
                    $displayKey = ucwords(str_replace('_', ' ', $key));
                    if ($key === 'content_size' || $key === 'file_size') {
                        $displayValue = number_format($value) . ' bytes';
                    } elseif (($key === 'width' || $key === 'height') && is_numeric($value)) {
                        $displayValue = $value . 'px';
                    } else {
                        $displayValue = htmlspecialchars($value);
                    }
                    $output .= "<div><strong>{$displayKey}:</strong> {$displayValue}</div>";
                }
            }
            $output .= "</div></div>";
        }

        // Custom Fields
        if (!empty($metadata['custom_fields'])) {
            $output .= "<div class='metadata-section'>";
            $output .= "<h5>🏷️ Custom Metadata Fields</h5>";
            
            foreach ($metadata['custom_fields'] as $categoryName => $fields) {
                if (!empty($fields)) {
                    $output .= "<div class='metadata-category'>";
                    $output .= "<h6>{$categoryName}</h6>";
                    $output .= "<div class='metadata-grid'>";
                    
                    foreach ($fields as $fieldName => $fieldData) {
                        $value = $fieldData['value'];
                        if (is_array($value)) {
                            $displayValue = implode(', ', array_map('htmlspecialchars', $value));
                        } else {
                            $displayValue = htmlspecialchars($value);
                        }
                        $output .= "<div><strong>{$fieldName}:</strong> {$displayValue}</div>";
                    }
                    $output .= "</div></div>";
                }
            }
            $output .= "</div>";
        }

        // Permissions
        if (!empty($metadata['permissions'])) {
            $output .= "<div class='metadata-section'>";
            $output .= "<h5>🔐 Permissions</h5>";
            $output .= "<div class='permissions-grid'>";
            
            foreach ($metadata['permissions'] as $permission => $allowed) {
                $status = $allowed ? '✅' : '❌';
                $permissionName = ucwords(str_replace(['Permission', '_'], ['', ' '], $permission));
                $output .= "<div>{$status} {$permissionName}</div>";
            }
            $output .= "</div></div>";
        }

        // Renditions
        if (!empty($metadata['renditions'])) {
            $output .= "<div class='metadata-section'>";
            $output .= "<h5>🎨 Available Renditions</h5>";
            
            foreach ($metadata['renditions'] as $type => $rendition) {
                $output .= "<div class='rendition-info'>";
                $output .= "<h6>" . ucwords(str_replace('_', ' ', $type)) . "</h6>";
                
                if ($rendition['width'] && $rendition['height']) {
                    $output .= "<p>Size: {$rendition['width']}x{$rendition['height']}px</p>";
                }
                if ($rendition['content_size']) {
                    $output .= "<p>File Size: " . number_format($rendition['content_size']) . " bytes</p>";
                }
                if ($rendition['mime_type']) {
                    $output .= "<p>Type: {$rendition['mime_type']}</p>";
                }
                $output .= "</div>";
            }
            $output .= "</div>";
        }

        $output .= "</div>";
        
        return $output;
    }
}