<?php

namespace Database\Factories;

use App\Models\Offer;
use App\Models\OfferItem;
use App\Models\OfferVersion;
use Illuminate\Database\Eloquent\Factories\Factory;

/**
 * @extends \Illuminate\Database\Eloquent\Factories\Factory<\App\Models\OfferItem>
 */
class OfferItemFactory extends Factory
{
    protected $model = OfferItem::class;

    public function definition(): array
    {
        $qty  = fake()->numberBetween(1, 4);
        $ppu  = (float) fake()->randomFloat(2, 200, 4_000);
        return [
            'position'     => 0,
            'type'         => OfferItem::TYPE_TRAVEL,
            'title'        => fake()->sentence(3),
            'description'  => null,
            'quantity'     => $qty,
            'price_per_unit' => $ppu,
            'total_price'    => round($qty * $ppu, 2),
            'travel_program_id' => null,
            'fewo_lodging_id'   => null,
            'metadata'          => null,
        ];
    }

    public function asDiscount(float $absAmount = 150): static
    {
        return $this->state([
            'type'            => OfferItem::TYPE_DISCOUNT,
            'title'           => 'Rabatt',
            'quantity'        => 1,
            'price_per_unit'  => -1 * abs($absAmount),
            'total_price'     => -1 * abs($absAmount),
        ]);
    }

    /**
     * Hängt die Position an die aktuelle Version eines per Factory erstellten Angebots.
     */
    public function forCurrentVersionOf(Offer $offer): static
    {
        $v = $offer->currentVersion;
        if (! $v) {
            throw new \InvalidArgumentException('Offer hat keine currentVersion — zuerst Offer::factory() erzeugen.');
        }
        return $this->state(fn (array $a) => [
            'offer_version_id' => $v->id,
            'position'         => (int) $v->items()->count(),
        ]);
    }

    public function forVersion(OfferVersion $version, ?int $position = null): static
    {
        return $this->state(function (array $a) use ($version, $position) {
            $pos = $position ?? (int) $version->items()->count();

            return [
                'offer_version_id' => $version->id,
                'position'         => $pos,
            ];
        });
    }
}