<?php

namespace Longyi\FreeGift\Services\Actions;

use Longyi\FreeGift\Config\Gift;

/**
 * action_type → 算法 的分发器。
 */
class GiftActionPool
{
    /**
     * @var array<string, AbstractGiftAction>
     */
    protected array $actions;

    public function __construct(
        SameProductAction $sameProduct,
        ProductAction $product,
        EachNAction $eachN,
        CartAction $cart,
        SpentAction $spent
    ) {
        $this->actions = [
            Gift::ACTION_SAME_PRODUCT  => $sameProduct,
            Gift::ACTION_WITH_PRODUCTS => $product,
            Gift::ACTION_EACH_N        => $eachN,
            Gift::ACTION_WHOLE_CART    => $cart,
            Gift::ACTION_SPENT         => $spent,
        ];
    }

    /**
     * 取 action_type 对应的算法。
     */
    public function get($actionType): ?AbstractGiftAction
    {
        return $this->actions[$actionType] ?? null;
    }
}