<?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
    {
        $variant = $this->variant;
        $product = $variant?->product;

        $attributesText = '';
        if ($variant && $variant->relationLoaded('definitions')) {
            $attributesText = $variant->definitions
                ->map(function ($definition) {
                    $attrName = $definition->productAttribute?->attribute?->nombre;
                    $value = $definition->value;
                    return $attrName ? "{$attrName}: {$value}" : $value;
                })
                ->filter()
                ->implode(', ');
        }

        $productName = $product?->nombre;
        if ($productName && $attributesText !== '') {
            $productName .= " ({$attributesText})";
        }

        $imageUrl = null;
        if ($variant && $variant->relationLoaded('attachments')) {
            $firstAttachment = $variant->attachments->first();
            if ($firstAttachment) {
                $imageUrl = $firstAttachment->getTemporaryUrl(1440);
            }
        }

        return [
            'id' => $this->id,
            'cantidad' => $this->cantidad,
            'precio_unitario' => $this->formatMoney($product?->precio),
            'product_id' => $product?->id,
            'product_variant_id' => $this->producto_variante_id,
            'product' => $product === null ? null : [
                'nombre' => $productName,
                'imagen' => $imageUrl,
            ],
        ];
    }

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