<?php

namespace App\Http\Resources\File;

use Illuminate\Http\Request;
use Illuminate\Http\Resources\Json\JsonResource;

class FileResource extends JsonResource
{
    /**
     * Transform the resource into an array.
     *
     * @return array<string, mixed>
     */
    public function toArray(Request $request): array
    {
        return [
            'id' => $this->id,
            'file_name' => $this->file_name,
            'mime_type' => $this->mime_type,
            'size_bytes' => $this->size_bytes,
            'size_formatted' => $this->formatted_size,
            'extension' => $this->extension,
            'storage_uri' => $this->storage_uri,
            'organized_path' => $this->organized_path,
            'sha256' => $this->sha256,
            'uploaded_by' => $this->uploaded_by,
            'uploader_name' => $this->uploader_name,
            'uploaded_at' => $this->uploaded_at?->format('Y-m-d H:i:s'),
            'created_at' => $this->created_at?->format('Y-m-d H:i:s'),
            'updated_at' => $this->updated_at?->format('Y-m-d H:i:s'),

            // File type helpers
            'is_image' => $this->is_image,
            'is_pdf' => $this->is_pdf,

            // URL for accessing the file (if public)
            'url' => $this->when(
                $this->is_public ?? false,
                asset('storage/' . $this->storage_uri)
            ),

            // Relations
            'user' => [
                'id' => $this->user?->id,
                'name' => $this->user?->name,
                'email' => $this->user?->email,
            ],

            // Additional metadata from the file's path structure
            'category' => $this->when(
                $this->storage_uri,
                function () {
                    $pathParts = explode('/', $this->storage_uri);
                    return $pathParts[count($pathParts) - 3] ?? 'general';
                }
            ),

            'subcategory' => $this->when(
                $this->storage_uri,
                function () {
                    $pathParts = explode('/', $this->storage_uri);
                    return $pathParts[count($pathParts) - 2] ?? 'general';
                }
            ),
        ];
    }
}