<?php

namespace App\Domains\Cart\Resources;

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

/**
 * @mixin \App\Domains\Cart\Models\CartItem
 */
class CartItemResource extends JsonResource
{
    /**
     * @return array<string, mixed>
     */
    public function toArray(Request $request): array
    {
        /** @var \App\Domains\Shared\Contracts\Buyable|null $buyable */
        $buyable = $this->buyable;
        
        $productName = $buyable?->getName();
        $precio = $buyable?->getPrice();
        
        $imageUrl = null;
        if ($this->buyable_type === \App\Domains\Catalog\Models\ProductVariant::class && $buyable && $buyable->relationLoaded('attachments')) {
            $firstAttachment = $buyable->attachments->first();
            if ($firstAttachment) {
                $imageUrl = $firstAttachment->getTemporaryUrl(1440);
            }
        }

        return [
            'id' => $this->id,
            'cantidad' => $this->cantidad,
            'precio_unitario' => $this->formatMoney($precio),
            'buyable_type' => $this->mapBuyableTypeToAlias($this->buyable_type),
            'buyable_id' => $this->buyable_id,
            'product' => $buyable === null ? null : [
                'nombre' => $productName,
                'imagen' => $imageUrl,
            ],
        ];
    }

    protected function mapBuyableTypeToAlias(?string $type): string
    {
        return match ($type) {
            \App\Domains\Catalog\Models\ProductVariant::class => 'variant',
            \App\Domains\Bundle\Models\Bundle::class => 'bundle',
            default => 'unknown',
        };
    }

    protected function formatMoney(float|int|string|null $amount): string
    {
        return number_format((float) ($amount ?? 0), 2, '.', '');
    }
}