<?php

declare(strict_types=1);

namespace KupShop\PreordersBundle\Util;

use KupShop\PreordersBundle\Exception\UnsupportedOperationException;

trait CustomDataArrayAccess
{
    protected array $customData = [];

    public function offsetExists(mixed $offset): bool
    {
        return $this->isProp($offset) || isset($this->customData[$offset]);
    }

    public function offsetGet(mixed $offset): mixed
    {
        if ($this->isProp($offset)) {
            return $this->{$offset};
        }

        return $this->customData[$offset];
    }

    public function offsetSet(mixed $offset, mixed $value): void
    {
        if ($this->isProp($offset)) {
            $this->{$offset} = $value;
        }

        $this->customData[$offset] = $value;
    }

    public function offsetUnset(mixed $offset): void
    {
        if ($this->isProp($offset)) {
            throw new UnsupportedOperationException('Cannot unset property!');
        }

        unset($this->customData[$offset]);
    }

    private function isProp(mixed $offset): bool
    {
        return is_string($offset) && $this->_publicPropertyExists($offset);
    }

    private function _publicPropertyExists(string $property): bool
    {
        static $properties = null;

        if ($properties === null) {
            $rc = new \ReflectionClass(self::class);
            $properties = array_map(
                fn (\ReflectionProperty $p) => $p->getName(),
                $rc->getProperties(\ReflectionProperty::IS_PUBLIC)
            );
        }

        return in_array($property, $properties);
    }
}