<?php
namespace Bitrix\Landing\Hook\Page;

use \Bitrix\Landing\Field;
use \Bitrix\Main\Localization\Loc;
use \Bitrix\Landing\Manager;

Loc::loadMessages(__FILE__);

class YaCounter extends \Bitrix\Landing\Hook\Page
{
	/**
	 * Map of the field.
	 * @return array
	 */
	protected function getMap()
	{
		$helpUrl = \Bitrix\Landing\Help::getHelpUrl('YACOUNTER');
		return array(
			'USE' => new Field\Checkbox('USE', array(
				'title' => Loc::getMessage('LANDING_HOOK_YACOUNTER_USE')
			)),
			'COUNTER' => new Field\Text('COUNTER', array(
				'title' => Loc::getMessage('LANDING_HOOK_YACOUNTER_COUNTER'),
				'placeholder' => Loc::getMessage('LANDING_HOOK_YACOUNTER_PLACEHOLDER'),
				'help' => $helpUrl
					? '<a href="' . $helpUrl . '" target="_blank">' .
							Loc::getMessage('LANDING_HOOK_DETAIL_HELP') .
					  '</a>'
					: ''
			))
		);
	}

	/**
	 * Enable only in high plan.
	 * @return boolean
	 */
	public function isFree()
	{
		return false;
	}

	/**
	 * Locked or not current hook in free plan.
	 * @return bool
	 */
	public function isLocked()
	{
		return !\Bitrix\Landing\Restriction\Manager::isAllowed(
			'limit_sites_google_analytics'
		);
	}

	/**
	 * Enable or not the hook.
	 * @return boolean
	 */
	public function enabled()
	{
		if ($this->isLocked())
		{
			return false;
		}

		if ($this->issetCustomExec())
		{
			return true;
		}

		return $this->fields['USE']->getValue() == 'Y';
	}

	/**
	 * Exec or not hook in edit mode.
	 * @return boolean
	 */
	public function enabledInEditMode()
	{
		return false;
	}

	/**
	 * Exec hook.
	 * @return void
	 */
	public function exec()
	{
		if ($this->execCustom())
		{
			return;
		}

		if ($this->fields['USE']->getValue() != 'Y')
		{
			return;
		}

		$this->setCounter($this->fields['COUNTER']);
	}

	/**
	 * Sets counter to the page.
	 * @param string $counter Counter code.
	 * @return void
	 */
	public static function setCounter(string $counter): void
	{
		$counter = \htmlspecialcharsbx(trim($counter));
		$counter = \CUtil::jsEscape($counter);
		if (!$counter)
		{
			return;
		}

		Cookies::addCookieScript(
			'ym',
			'(function(m,e,t,r,i,k,a){m[i]=m[i]||function(){(m[i].a=m[i].a||[]).push(arguments)};
					m[i].l=1*new Date();
					for (var j = 0; j < document.scripts.length; j++) {if (document.scripts[j].src === r) { return; }}
					k=e.createElement(t),a=e.getElementsByTagName(t)[0],k.async=1,k.src=r,a.parentNode.insertBefore(k,a)})
					(window, document, "script", "https://mc.yandex.ru/metrika/tag.js", "ym");
					ym(\'' . $counter . '\', "init", {
						clickmap:true,
						trackLinks:true,
						accurateTrackBounce:true,
						webvisor:true,
						trackHash:true,
						ecommerce:"dataLayer"
				   });'
		);
		Manager::setPageView(
			'Noscript',
			'<noscript>
				<div><img src="https://mc.yandex.ru/watch/' . $counter . '" style="position:absolute; left:-9999px;" alt="" /></div>
			</noscript>'
		);
	}
}