<?php declare(strict_types=1);


namespace App\Discounts\Conditions;


use App\Cart\ShoppingCartItem;
use App\Categories\Models\Category;
use App\Discounts\DiscountableInterface;

class ProductCategoryHandler extends AbstractDiscountConditionHandler
{
    protected ?int $type = DiscountConditionTypes::PRODUCT_CATEGORY;

    public function canBeApplied(DiscountableInterface $discountable, string $operator, string $param): bool
    {
        if(!is_a($discountable, ShoppingCartItem::class)) return false;

        return $discountable->getProductable()->categories->filter(function(Category $category) use($param, $operator) {
            $result = false;

            if($operator === 'in') {
                if(in_array($category->id, $this->dissectParam($param), true)) $result = true;
            } else if($operator === 'not_in') {
                if(!in_array($category->id, $this->dissectParam($param), true)) $result = true;
            } else if($operator === '<') {
                if(strlen($category->id) < strlen($param)) $result = true;
            } else if($operator === '<=') {
                if(strlen($category->id) <= strlen($param)) $result = true;
            } else if($operator === '==') {
                if(strlen($category->id) == strlen($param)) $result = true;
            } else if($operator === '!=') {
                if(strlen($category->id) != strlen($param)) $result = true;
            } else if($operator >= '>=') {
                if(strlen($category->id) >= strlen($param)) $result = true;
            } else if($operator > '>') {
                if(strlen($category->id) > strlen($param)) $result = true;
            }
            return $result;
        })->count() > 0;
    }

    private function dissectParam(string $param) {
        return array_map(function($param) {
            return intval(trim($param));
        }, explode(',', $param));
    }
}