<?php

namespace Bx\Discount;

use Wt\Core\Entity\AgentEntity;

class ElementSpider
{
    protected $agent;

    public function __construct()
    {

    }

    public function next()
    {
        if(!$this->canDo()){
            if($this->isDataExpired()){
                $this->reset();
            }
            return false;
        }
        $lastId = $this->getLastId();
        if($lastId == 0){
            $this->setBeginTimestamp();
        }
        $iBlockId = discountApp()->config('CATALOG_IBLOCK_ID');
        $ids = Tools::getElementList($lastId);
        if(count($ids) == 0){
            $this->setEndTimestamp();
        }
        $__lastId = 0;
        foreach ($ids as $id){
            $__lastId = $id;
            Tools::setTicketValueFromDiscount($id);
        }
        $this->setLastId($__lastId);
        return true;
    }

    public function canDo()
    {
        $resetTimestamp = $this->getResetTimestamp();
        $spiderBeginTimestamp = $this->getBeginTimestamp();
        $spiderEndTimestamp = $this->getEndTimestamp();

        return ($resetTimestamp > $spiderEndTimestamp)
            || ($resetTimestamp > $spiderBeginTimestamp);
    }

    public function isDataExpired()
    {
        $spiderEndTimestamp = $this->getEndTimestamp();
        $renewalPeriod = discountApp()->config('RENEWAL_PERIOD');
        return $spiderEndTimestamp + $renewalPeriod < time();
    }

    public function getLastId()
    {
        return (int)discountApp()->setting()->get('last_id', 0);
    }

    public function setLastId($lastId)
    {
        discountApp()->setting()->set('last_id', (int)$lastId);
        return $this;
    }

    public function setBeginTimestamp()
    {
        discountApp()->setting()->set('spider_begin_timestamp', time());
        return $this;
    }

    public function getBeginTimestamp()
    {
        return (int)discountApp()->setting()->get('spider_begin_timestamp', 0);
    }

    public function setEndTimestamp()
    {
        discountApp()->setting()->set('spider_end_timestamp', time());
        return $this;
    }

    public function getEndTimestamp()
    {
        return (int)discountApp()->setting()->get('spider_end_timestamp', 0);
    }

    public function setResetTimestamp()
    {
        discountApp()->setting()->set('spider_reset_timestamp', time());
        return $this;
    }

    public function getResetTimestamp()
    {
        return (int)discountApp()->setting()->get('spider_reset_timestamp', 0);
    }

    public function reset()
    {
        $this->setLastId(0);
        $this->setResetTimestamp();
        return $this;
    }

    public function setAgent($agent)
    {
        $this->agent = $agent;
    }

    /**
     * @return AgentEntity|null
     */
    public function getAgent()
    {
        return $this->agent;
    }
}