<?php

namespace App\TradeShow\Attendee\Validate;

use App\TradeShow\CartItemObj;
use Qs_Db;
use Zend_Validate_Exception as Exception;
use Zend_Config;
use Zend_Validate_Abstract;
use Qs_Translate;

class NotInCart extends Zend_Validate_Abstract
{
    const IN_CART = 'inCart';

    protected $_cartId;
    protected $_messages = [
        self::IN_CART => [
            "Registration for %value% is already in the Shopping Cart",
            "Registrations for %value% are already in the Shopping Cart",
        ]
    ];

    function __construct(array $options)
    {
        if ($options instanceof Zend_Config) {
            $options = $options->toArray();
        } else if (!is_array($options)) {
            throw new Exception('Invalid options');
        }
        if (!array_key_exists('cartId', $options)) {
            throw new Exception('cartId is undefined');
        }
        if (!array_key_exists('elementId', $options)) {
            throw new Exception('elementId is undefined');
        }
        $this->setCartId($options['cartId']);
        $this->setElementId($options['elementId']);
    }

    /**
     * @param mixed $cartId
     * @return $this
     */
    public function setCartId($cartId)
    {
        $this->_cartId = $cartId;
        return $this;
    }

    /**
     * @return mixed
     */
    public function getCartId()
    {
        return $this->_cartId;
    }

    /**
     * @param mixed $elementId
     * @return $this
     */
    public function setElementId($elementId)
    {
        $this->_elementId = $elementId;
        return $this;
    }

    protected function _setMessageTemplate($errorsCount)
    {
        $this->_messageTemplates[self::IN_CART] = Qs_Translate::getPlural($this->_messages[self::IN_CART], $errorsCount);
        return $this;
    }

    public function isValid($value, $context = null)
    {
        if ($this->getCartId() && $attendeeInCart = $this->_getAttendeesInCart()) {
            $alreadyAddedToCartUsers = [];
            if (is_array($context[$this->_elementId])) {
                foreach ($context[$this->_elementId] as $value) {
                    if ($this->isInCart($value, $attendeeInCart)) {
                        $alreadyAddedToCartUsers[] = $value['_' . $this->_elementId];
                    }
                }
            } else {
                if ($this->isInCart($context, $attendeeInCart)) {
                    $alreadyAddedToCartUsers[] = $context['_' . $this->_elementId];
                }
            }
            if ($alreadyAddedToCartUsers) {
                $this->_setMessageTemplate(count($alreadyAddedToCartUsers));
                $this->_error(self::IN_CART, implode(', ', $alreadyAddedToCartUsers));
                return false;
            }
        }
        return true;
    }

    protected function isInCart($value, $attendeeInCart)
    {
        return in_array($value[$this->_elementId], $attendeeInCart);
    }

    protected function _getAttendeesInCart()
    {
        $select = Qs_Db::getSelect();
        $select->from(Qs_Db::getPair('CartItem', 'ci'), ['tsa.userId']);
        $select->joinLeft(Qs_Db::getPair('TradeShowRegistration', 'tsr'), '`ci`.`productId` = `tsr`.`id`');
        $select->joinLeft(Qs_Db::getPair('TradeShowAttendee', 'tsa'), '`tsa`.`registrationId` = `tsr`.`id`');
        $select->where('`ci`.`cartId` = ?', $this->getCartId(), Qs_Db::INT_TYPE);
        $select->where('`ci`.`cartItemType` = ?', CartItemObj::ITEM_TYPE);
        $select->where('`tsr`.`bought` = ?', 'n');
        return Qs_Db::getInstance()->fetchCol($select);
    }
}