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<?php

    namespace Inteve\FeedGenerator\Feeds\Zbozi;

    use Inteve\FeedGenerator\AssertException;
    use Inteve\FeedGenerator\IFeedItem;
    use Inteve\FeedGenerator\InvalidArgumentException;
    use Inteve\FeedGenerator\Utils\Helpers;
    use Nette\Utils\Validators;


    class ZboziItem implements IFeedItem
    {
        const DELIVERY_DATE_UNKNOW = -1;

        /** @var string|int|NULL */
        private $id;

        /** @var string|NULL */
        private $productName;

        /** @var string|NULL */
        private $description;

        /** @var string|NULL */
        private $url;

        /** @var string|NULL */
        private $price;

        /** @var string|NULL */
        private $deliveryDate;

        /** @var ZboziItemParameter[] */
        private $parameters = array();

        /** @var string|NULL */
        private $imageUrl;

        /** @var string|NULL */
        private $groupId;


        /**
         * @return string|int|NULL
         */
        public function getId()
        {
            return $this->id;
        }


        /**
         * @param  string|int
         * @return self
         */
        public function setId($id)
        {
            $this->id = $id;
            return $this;
        }


        /**
         * @return string|NULL
         */
        public function getProductName()
        {
            return $this->productName;
        }


        /**
         * @param  string
         * @return self
         */
        public function setProductName($productName)
        {
            $this->productName = $productName;
            return $this;
        }


        /**
         * @return string|NULL
         */
        public function getDescription()
        {
            return $this->description;
        }


        /**
         * @param  string
         * @return self
         */
        public function setDescription($description)
        {
            $this->description = $description;
            return $this;
        }


        /**
         * @return string|NULL
         */
        public function getUrl()
        {
            return $this->url;
        }


        /**
         * @param  string
         * @return self
         */
        public function setUrl($url)
        {
            $this->url = $url;
            return $this;
        }


        /**
         * @return string|NULL
         */
        public function getDeliveryDate()
        {
            return $this->deliveryDate;
        }


        /**
         * @param  string|\DateTimeInterface|int
         * @return self
         */
        public function setDeliveryDate($deliveryDate)
        {
            if ($deliveryDate instanceof \DateTimeInterface) {
                $this->deliveryDate = $deliveryDate->format('Y-m-d');

            } else {
                $this->deliveryDate = $deliveryDate;
            }
            return $this;
        }


        /**
         * @return string|NULL
         */
        public function getPrice()
        {
            return $this->price;
        }


        /**
         * @param  string|float|int
         * @return self
         */
        public function setPrice($price)
        {
            $this->price = $this->formatPrice($price);
            return $this;
        }


        /**
         * @return ZboziItemParameter[]
         */
        public function getParameters()
        {
            return $this->parameters;
        }


        /**
         * @param  string
         * @param  string
         * @param  string|NULL
         * @return self
         */
        public function addParameter($name, $value, $unit = NULL)
        {
            $this->parameters[] = new ZboziItemParameter($name, $value, $unit);
            return $this;
        }


        /**
         * @return string|NULL
         */
        public function getImageUrl()
        {
            return $this->imageUrl;
        }


        /**
         * @param  string
         * @return self
         */
        public function setImageUrl($imageUrl)
        {
            $this->imageUrl = $imageUrl;
            return $this;
        }


        /**
         * @return string|NULL
         */
        public function getGroupId()
        {
            return $this->groupId;
        }


        /**
         * @param  string
         * @return self
         */
        public function setGroupId($groupId)
        {
            $this->groupId = $groupId;
            return $this;
        }


        /**
         * @return void
         * @throws AssertException
         */
        public function validate()
        {
            Helpers::assert(isset($this->productName), 'Missing item product name, call $item->setProductName().');
            Helpers::assert(isset($this->description), 'Missing item description, call $item->setDescription().');
            Helpers::assert(isset($this->url), 'Missing item URL, call $item->setUrl().');
            Helpers::assert(isset($this->imageUrl), 'Missing item image URL, call $item->setImageUrl().');
            Helpers::assert(isset($this->price), 'Missing item price, call $item->setPrice().');
        }


        /**
         * @param  string|float|int
         * @param  string
         * @return string
         */
        protected function formatPrice($price)
        {
            return number_format($price, 2, '.', '');
        }


        /**
         * @return static
         */
        public static function create()
        {
            return new static;
        }
    }