<?php

namespace App\Domains\Cart\Resources;

use App\Domains\Cart\Models\CartItem;
use App\Domains\Catalog\Enums\InventoryPolicy;
use App\Domains\Catalog\Models\Variant;
use Illuminate\Http\Request;
use Illuminate\Http\Resources\Json\JsonResource;
use Illuminate\Support\Collection;

/**
 * @mixin CartItem
 */
class CartItemResource extends JsonResource
{
    /**
     * @return array<string, mixed>
     */
    public function toArray(Request $request): array
    {
        $selectedItem = $this->selectedItem();
        $imageUrl = null;

        if ($selectedItem?->relationLoaded('attachments')) {
            $imageUrl = $selectedItem->attachments->first()?->getTemporaryUrl(1440);
        }

        if ($imageUrl === null && $this->catalogItem?->relationLoaded('attachments')) {
            $imageUrl = $this->catalogItem->attachments->first()?->getTemporaryUrl(1440);
        }

        return [
            'id' => $this->id,
            'cantidad' => $this->cantidad,
            'precio_unitario' => $this->formatMoney($selectedItem?->getPrice()),
            'catalog_item_id' => $this->catalog_item_id,
            'variant_id' => $this->variant_id,
            'product' => $selectedItem === null ? null : [
                'nombre' => $selectedItem->getName(),
                'imagen' => $imageUrl,
                'variants' => $this->catalogItem->variants
                    ->map(fn (Variant $variant): array => [
                        'id' => $variant->id,
                        'precio' => $this->formatMoney($variant->getPrice()),
                        'stock_tecnico' => $this->catalogItem->inventory_policy === InventoryPolicy::Unlimited
                            ? null
                            : $variant->inventory->availableStock(),
                        'values' => $this->variantValues($variant),
                    ])
                    ->values(),
            ],
        ];
    }

    /** @return Collection<string, string|array<int, string>> */
    private function variantValues(Variant $variant): Collection
    {
        $values = $variant->selectionValues();
        $eventDates = $variant->selectedEventDates();

        if ($eventDates->isNotEmpty()) {
            $labels = $eventDates
                ->map(fn ($eventDate): string => $eventDate->date->format('d/m/Y').' · '
                    .substr($eventDate->time_start, 0, 5).' a '
                    .substr($eventDate->time_end, 0, 5))
                ->values();

            $values->put(
                'event_date',
                $labels->count() === 1 ? $labels->first() : $labels->all(),
            );
        }

        return $values;
    }

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