<?php
    namespace Netopia\Netcard\Mobilpay\Payment;
    /**
     * Class MobilpayPaymentInvoice
     * @copyright NETOPIA
     * @author Claudiu Tudose
     * @version 1.0
     *
     */
    class MobilpayPaymentInvoice
    {
        const ERROR_INVALID_PARAMETER			= 0x11110001;
        const ERROR_INVALID_CURRENCY			= 0x11110002;
        const ERROR_ITEM_INSERT_INVALID_INDEX	= 0x11110003;

        const ERROR_LOAD_FROM_XML_CURRENCY_ATTR_MISSING	= 0x31110001;

        public $currency				= null;
        public $amount					= null;
        public $details					= null;
        public $installments			= null;
        public $selectedInstallments	= null;
        public $tokenId			= null;
        public $promotionCode			= null;


        protected $billingAddress	= null;
        protected $shippingAddress	= null;

        protected $items			= array();
        protected $exchangeRates	= array();

        public function __construct($elem = null)
        {
            if($elem != null)
            {
                $this->loadFromXml($elem);
            }
        }

        protected function loadFromXml($elem)
        {
            $attr = $elem->attributes->getNamedItem('currency');
            if($attr == null)
            {
                throw new Exception('MobilpayPaymentInvoice::loadFromXml failed; currency attribute missing', self::ERROR_LOAD_FROM_XML_CURRENCY_ATTR_MISSING);
            }
            $this->currency = $attr->nodeValue;

            $attr = $elem->attributes->getNamedItem('amount');
            if($attr != null)
            {
                $this->amount = $attr->nodeValue;
            }

            $attr = $elem->attributes->getNamedItem('installments');
            if($attr != null)
            {
                $this->installments = $attr->nodeValue;
            }

            $attr = $elem->attributes->getNamedItem('selected_installments');
            if($attr != null)
            {
                $this->selectedInstallments = $attr->nodeValue;
            }

            $attr = $elem->attributes->getNamedItem('token_id');
            if($attr != null)
            {
                $this->tokenId = $attr->nodeValue;
            }

            $attr = $elem->attributes->getNamedItem('promotion_code');
            if($attr != null)
            {
                $this->promotionCode = $attr->nodeValue;
            }

            $elems = $elem->getElementsByTagName('details');
            if($elems->length == 1)
            {
                $this->details = urldecode($elems->item(0)->nodeValue);
            }

            $elems = $elem->getElementsByTagName('contact_info');
            if($elems->length == 1)
            {
                $addrElem = $elems->item(0);

                $elems = $addrElem->getElementsByTagName('billing');
                if($elems->length == 1)
                {
                    $this->billingAddress = new MobilpayPaymentAddress($elems->item(0));
                }

                $elems = $addrElem->getElementsByTagName('shipping');
                if($elems->length == 1)
                {
                    $this->shippingAddress = new MobilpayPaymentAddress($elems->item(0));
                }
            }

            $this->items = array();
            $elems = $elem->getElementsByTagName('items');
            if($elems->length == 1)
            {
                $itemElems = $elems->item(0);
                $elems = $itemElems->getElementsByTagName('item');
                if($elems->length > 0)
                {
                    $amount = 0;
                    foreach ($elems as $itemElem)
                    {
                        try
                        {
                            $objItem = new MobilpayPaymentInvoiceItem($itemElem);
                            $this->items[] = $objItem;
                            $amount += $objItem->getTotalAmount();
                        }
                        catch (Exception $e)
                        {
                            $e = $e;
                            continue;
                        }
                    }
                    $this->amount = $amount;
                }
            }

            $this->exchangeRates = array();
            $elems = $elem->getElementsByTagName('exchange_rates');
            if($elems->length == 1)
            {
                $rateElems = $elems->item(0);
                $elems = $rateElems->getElementsByTagName('rate');
                foreach ($elems as $rateElem)
                {
                    try
                    {
                        $objRate = new Mobilpay_Payment_Exchange_Rate($rateElem);
                        $this->exchangeRates[] = $objRate;
                    }
                    catch (Exception $e)
                    {
                        $e = $e;
                        continue;
                    }
                }
            }
        }

        public function createXmlElement(\DOMDocument $xmlDoc)
        {
            if(!($xmlDoc instanceof \DOMDocument))
            {
                throw new Exception('', self::ERROR_INVALID_PARAMETER);
            }

            $xmlInvElem = $xmlDoc->createElement('invoice');

            if($this->currency == null)
            {
                throw new Exception('Invalid currency', self::ERROR_INVALID_CURRENCY);
            }

            $xmlAttr 			= $xmlDoc->createAttribute('currency');
            $xmlAttr->nodeValue	= $this->currency;
            $xmlInvElem->appendChild($xmlAttr);

            if($this->amount != null)
            {
                $xmlAttr			= $xmlDoc->createAttribute('amount');
                $xmlAttr->nodeValue = sprintf('%.02f', doubleval($this->amount));
                $xmlInvElem->appendChild($xmlAttr);
            }

            if($this->installments != null)
            {
                $xmlAttr			= $xmlDoc->createAttribute('installments');
                $xmlAttr->nodeValue = $this->installments;
                $xmlInvElem->appendChild($xmlAttr);
            }

            if($this->selectedInstallments != null)
            {
                $xmlAttr			= $xmlDoc->createAttribute('selected_installments');
                $xmlAttr->nodeValue = $this->selectedInstallments;
                $xmlInvElem->appendChild($xmlAttr);
            }

            if($this->tokenId != null)
            {
                $xmlAttr			= $xmlDoc->createAttribute('token_id');
                $xmlAttr->nodeValue = $this->tokenId;
                $xmlInvElem->appendChild($xmlAttr);
            }

            if($this->promotionCode != null)
            {
                $xmlAttr			= $xmlDoc->createAttribute('promotion_code');
                $xmlAttr->nodeValue = $this->promotionCode;
                $xmlInvElem->appendChild($xmlAttr);
            }

            if($this->details != null)
            {
                $xmlElem			= $xmlDoc->createElement('details');
                $xmlElem->appendChild($xmlDoc->createCDATASection(urlencode($this->details)));
                $xmlInvElem->appendChild($xmlElem);
            }

            if(($this->billingAddress instanceof MobilpayPaymentAddress) || ($this->shippingAddress instanceof MobilpayPaymentAddress))
            {
                $xmlAddr = null;
                if($this->billingAddress instanceof MobilpayPaymentAddress)
                {
                    try
                    {
                        $xmlElem = $this->billingAddress->createXmlElement($xmlDoc, 'billing');
                        if($xmlAddr == null)
                        {
                            $xmlAddr = $xmlDoc->createElement('contact_info');
                        }
                        $xmlAddr->appendChild($xmlElem);
                    }
                    catch(Exception $e)
                    {
                        $e = $e;
                    }
                }
                if($this->shippingAddress instanceof MobilpayPaymentAddress)
                {
                    try
                    {
                        $xmlElem = $this->shippingAddress->createXmlElement($xmlDoc, 'shipping');
                        if($xmlAddr == null)
                        {
                            $xmlAddr = $xmlDoc->createElement('contact_info');
                        }
                        $xmlAddr->appendChild($xmlElem);
                    }
                    catch(Exception $e)
                    {
                        $e = $e;
                    }
                }
                if($xmlAddr != null)
                {
                    $xmlInvElem->appendChild($xmlAddr);
                }
            }

            if(is_array($this->items) && sizeof($this->items) > 0)
            {
                $xmlItems = null;
                foreach ($this->items as $item)
                {
                    if(!($item instanceof MobilpayPaymentInvoiceItem))
                    {
                        continue;
                    }
                    try
                    {
                        $xmlItem = $item->createXmlElement($xmlDoc);
                        if($xmlItems == null)
                        {
                            $xmlItems = $xmlDoc->createElement('items');
                        }
                        $xmlItems->appendChild($xmlItem);
                    }
                    catch (Exception $e)
                    {
                        $e = $e;
                    }
                }
                if($xmlItems != null)
                {
                    $xmlInvElem->appendChild($xmlItems);
                }
            }

            if(is_array($this->exchangeRates) && sizeof($this->exchangeRates) > 0)
            {
                $xmlRates = null;
                foreach ($this->exchangeRates as $rate)
                {
                    if(!($rate instanceof Mobilpay_Payment_Exchange_Rate))
                    {
                        continue;
                    }
                    try
                    {
                        $xmlRate = $rate->createXmlElement($xmlDoc);
                        if($xmlRates == null)
                        {
                            $xmlRates = $xmlDoc->createElement('items');
                        }
                        $xmlRates->appendChild($xmlRate);
                    }
                    catch (Exception $e)
                    {
                        $e = $e;
                    }
                }
                if($xmlItems != null)
                {
                    $xmlInvElem->appendChild($xmlRates);
                }
            }

            return $xmlInvElem;
        }

        public function setBillingAddress(MobilpayPaymentAddress $address)
        {
            $this->billingAddress = $address;

            return $this;
        }

        public function setShippingAddress(MobilpayPaymentAddress $address)
        {
            $this->shippingAddress = $address;

            return $this;
        }

        public function getBillingAddress()
        {
            return $this->billingAddress;
        }

        public function getShippingAddress()
        {
            return $this->shippingAddress;
        }

        public function addHeadItem(MobilpayPaymentInvoiceItem $item)
        {
            array_unshift($this->items, $item);

            return $this;
        }

        public function addTailItem(MobilpayPaymentInvoiceItem $item)
        {
            array_push($this->items, $item);

            return $this;
        }

        public function removeHeadItem()
        {
            return array_shift($this->items);
        }

        public function removeTailItem()
        {
            return array_pop($this->items);
        }

        public function addHeadExchangeRate(Mobilpay_Payment_Exchange_Rate $rate)
        {
            array_unshift($this->exchangeRates, $rate);

            return $this;
        }

        public function addTailExchangeRate(Mobilpay_Payment_Exchange_Rate $rate)
        {
            array_push($this->exchangeRates, $rate);

            return $this;
        }

        public function removeHeadExchangeRate()
        {
            return array_shift($this->exchangeRates);
        }

        public function removeTailExchangeRate()
        {
            return array_pop($this->exchangeRates);
        }
    }