<?php

namespace sitemap\controllers;

use Yii;
use yii\web\Controller;
use yii\web\Response;
use yii\helpers\ArrayHelper;
use yii\helpers\Url;
use DOMDocument;
use app\models\front\News;
use yii\db\ActiveQuery;
use yii\db\Query;
use yii\db\Expression;

/**
 * DefaultController implements actions
 */
class DefaultController extends Controller
{
    const ALWAYS = 'always';
    const HOURLY = 'hourly';
    const DAILY = 'daily';
    const WEEKLY = 'weekly';
    const MONTHLY = 'monthly';
    const YEARLY = 'yearly';
    const NEVER = 'never';
	const ITEMSONPAGE = 200;

    protected $items = array();

    public $defaultAction = 'index';
	public function actions()
    {
        return [
            'error' => [
                'class' => 'yii\web\ErrorAction',
            ],
        ];
    }
	public function actionIndex()
    {
		$activenews = Yii::$app->cache->getOrSet("active-news",function (){
			$query = new Query;
			$query->select('count(`id`) as cnt')
				->from(News::tableName())
				->where(['active'=>'Y'])
				->andWhere(["<=","dt_pub",date("Y-m-d H:i:00")])
				->limit(1);
			$rows = $query->one();
			return $rows['cnt'];
		},60*60*2); 
		Yii::$app->cache->set('active-news-cnt', $activenews);
		$items = [];
		$count = round($activenews/self::ITEMSONPAGE)-1;
		for ($i = 0; $i <= $count; $i++){
			$items[] = ['loc'=>'https://www.amic.ru/sitemap/news/'.$i];
		}
		$content = $this->GetIndexXML($items);
		Yii::$app->response->format = \yii\web\Response::FORMAT_RAW;
		Yii::$app->response->headers->set('content-type', 'application/xml;charset=utf-8');
		return $this->renderPartial('/main',['content' => $content]);
    }

	public function actionNews($page)
    {
		$activenews = Yii::$app->cache->get('active-news-cnt' );
        if( !$activenews ){
            $activenews = Yii::$app->cache->getOrSet("active-news",function (){
            $query = new Query;
            $query->select('count(`id`) as cnt')
                ->from(News::tableName())
                ->where(['active'=>'Y'])
                ->andWhere(["<=","dt_pub",date("Y-m-d H:i:00")])
                ->limit(1);
            $rows = $query->one();
            return $rows['cnt'];
            },60*60*2); 		
        }
		$max_page = round($activenews/self::ITEMSONPAGE) - 1;
		$invert_page = $max_page - $page;
		if( $page > $max_page ) return '';
		$yandex = ( strpos( $_SERVER['HTTP_USER_AGENT'], 'andex' ) === false )?'':'_y';
        $cache = Yii::$app->cache;
        $key = "sitemap-a_{$page}{$yandex}";
		if( isset($_REQUEST['purge']) && $_REQUEST['purge'] == 'PURGE' ){
			$cache->delete($key);
		}
        $data = $cache->get($key);
		$ctime = 60*60*24*180+rand(0,400000);
		$scaninterval = self::MONTHLY;
		$scanpror = 0.5;
		if( $invert_page < 10 ){
			$ctime = 60*10;
			$scaninterval = self::DAILY;
			$scanpror = 0.8;
		}

		if( $invert_page < 2 ){
			$ctime = 60*5;
			$scaninterval = self::HOURLY;
			$scanpror = 0.9;
		}
        if ($data === false) {
			$crequest = Yii::$app->memcache->get('sitemap_r_cnt');
			if( $crequest > 4 ) {
				header("HTTP/1.1 429 Too Many Requests");
				Yii::$app->end();
				return '';
			}
			Yii::$app->memcache->set('sitemap_r_cnt', $crequest++, 60);
            $newsDataProvider = new \yii\data\ActiveDataProvider(
						[
						"query"=>\app\models\front\News::find()
							->select( 'news.*' )
							->from(new Expression("news FORCE INDEX (top,calendar)"))
							->andwhere(['active'=>'Y'])->orderBy(["id"=>SORT_DESC]),
							"pagination" =>[
								"pageSize"=>200,
								"page"=>$invert_page
							],
						]
            );
            $this->addModels( $newsDataProvider->getModels(), $scaninterval, $scanpror );
            $content = $this->GetXML($invert_page);
            $data = $this->renderPartial('/news',['content' => $content]);
            $cache->set($key, $data, $ctime);
			$crequest = Yii::$app->memcache->get('sitemap_r_cnt');
			if( $crequest > 0 ) {
				Yii::$app->memcache->set('sitemap_r_cnt', $crequest--, 60);
			}
        }else{
			Yii::$app->response->format = \yii\web\Response::FORMAT_RAW;
			Yii::$app->response->headers->set('content-type', 'application/xml;charset=utf-8');
		}
		return $data;
    }


    /**
     * @return string XML code
     */
    public function GetIndexXML($items)
    {
        $dom = new DOMDocument('1.0', 'UTF-8');
        $urlset = $dom->createElement('sitemapindex');
        $urlset->setAttribute('xmlns','http://www.sitemaps.org/schemas/sitemap/0.9');
        foreach($items as $item)
        {
            $url = $dom->createElement('sitemap');

            foreach ($item as $key=>$value)
            {
                $elem = $dom->createElement($key);
                $elem->appendChild($dom->createTextNode($value));
                $url->appendChild($elem);
            }

            $urlset->appendChild($url);
        }
        $dom->appendChild($urlset);

        return $dom->saveXML();
    }


    /**
     * @return string XML code
     */
    public function GetXML($page)
    {
        $dom = new DOMDocument('1.0', 'UTF-8');
        $urlset = $dom->createElement('urlset');
        $urlset->setAttribute('xmlns:xsi','https://www.w3.org/2001/XMLSchema-instance');
        $urlset->setAttribute('xmlns','https://www.sitemaps.org/schemas/sitemap/0.9');
        $urlset->setAttribute('xsi:schemaLocation',"https://www.sitemaps.org/schemas/sitemap/0.9 https://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd");
		$urlset->setAttribute('xmlns:image',"https://www.google.com/schemas/sitemap-image/1.1");
		$urlset->setAttribute('xmlns:news',"https://www.google.com/schemas/sitemap-news/0.9");
        foreach($this->items as $item)
        {
            $url = $dom->createElement('url');
            $url = $this->recarray($item, $dom, $url);
            $urlset->appendChild($url);
        }
        $dom->appendChild($urlset);

        return $dom->saveXML();
    }
    
    protected function recarray($array, $dom, $url)
    {
        foreach($array as $key=>$value)
        {  
            $elem = $dom->createElement($key);
            if(is_array($value))
            {
                $urle = $this->recarray($value, $dom, $elem);
                $url->appendChild($urle);
            }else{
				$elem->appendChild($dom->createTextNode($value));
                $url->appendChild($elem);
            }
        }
        return $url;
    }

    protected function dateToW3C($date)
    {
        if (is_int($date))
            return date(DATE_W3C, $date);
        else
            return date(DATE_W3C, strtotime($date));
    }
    /**
     * @param CActiveRecord[] $models
     * @param string $changeFreq
     * @param float $priority
     */
    public function addModels($models, $changeFreq=self::DAILY, $priority=0.5)
    {
        $host = Yii::$app->request->hostInfo;
		$host = 'https://www.amic.ru';
        $yandex = ( strpos( $_SERVER['HTTP_USER_AGENT'], 'andex' ) === false )?false:true;
        foreach ($models as $model)
        {
            $item = [
                'loc' => $host.$model->GetUrl(),
                'changefreq' => $changeFreq,
                'priority' => $priority
            ];

            if ($model->hasAttribute('dt_upd') && $model->dt_upd)
			{
                $item['lastmod'] = $this->dateToW3C($model->dt_upd);
			}else{
                $item['lastmod'] = $this->dateToW3C($model->dt_pub);
			}
			if( !$yandex ){
                $item['image:image'] = [
                    'image:loc' => $model->getImage('jpg')->getUrl(),
                    'image:caption' => ( $model->photo_title == '' )?$model->title:$model->photo_title		//get_imageTitle
                ];

                $item['news:news'] =[
                    'news:publication_date' => $model->dt_pub,
                    'news:title' => $model->title,
                    'news:publication' =>
                    [
                        'news:name' => 'amic.ru',
                        'news:language' => 'ru'
                    ]
                ];
            }
            $this->items[] = $item;
        }
    }
    public function addUrl($url, $changeFreq=self::DAILY, $priority=0.5, $lastMod=0)
    {
        $host = Yii::$app->request->hostInfo;
		$host = 'https://www.amic.ru';
        $item = array(
            'loc' => $host . $url,
            'changefreq' => $changeFreq,
            'priority' => $priority
        );
        if ($lastMod)
            $item['lastmod'] = $this->dateToW3C($lastMod);

        $this->items[] = $item;
    }
}