<?php namespace Lib\Services\Scraping;

use App;
use Lib\Services\Db\Writer;
use Lib\Services\Scraping\Scraper;
use Symfony\Component\DomCrawler\Crawler;

class NewsScraper extends Curl
{
	/**
	 * Array of scraped news.
	 *
	 * @var array
	 */
	private $news;

	/**
	 * Writer instance.
	 *
	 * @var Lib\Services\Db\Writer
	 */
	private $dbWriter;

	public function __construct(Writer $dbWriter)
	{
		$this->dbWriter = $dbWriter;
	}

	/**
	 * Scrapes news from all sources and saves to db.
	 * @return void
	 */
	public function all()
	{
		$provider = App::make('Options')->getNewsProvider();

		if ($provider == 'firstshowing') {
			$this->getFromFirstShowing()->save();
		} else {
			$this->getFromScreenRant()->save();
		}
	}

	/**
	 * Scrapes and compiles news for saving from
	 * FirstShowing website.
	 *
	 * @return self
	 */
	private function getFromFirstShowing()
{
	$compiledNews = array();
	$news = $this->curl('http://www.kinopoisk.ru/news/');
	$crawler = new Crawler($news);

	//first we'll grab every news item on the page
	foreach ($crawler->filter('.newsList .item') as $node)
	{
		$cr = new Crawler($node);
		//then we will compile array out of every new items
		$compiledNews[] = array(
			'title'    => head($cr->filter('.title > a')->extract(array('_text'))),
			'image'	   => head($cr->filter('.pic > a > img')->extract(array('src'))),
			'body'     => head($cr->filter('.descr')->extract(array('_text'))),
			'full_url' => 'http://kinopoisk.ru' . head($cr->filter('.more > a')->extract(array('href'))),
			'source'   => 'KinoPoisk',
			'fully_scraped' => 0,
		);
	}

	$this->news = $compiledNews;

	return $this;
}

	/**
	 * Get full info about single news item from current
	 * active news provider.
	 *
	 * @param  string $url
	 * @return array
	 */
	public function getSingle($url)
	{
		$provider = App::make('Options')->getNewsProvider();

		if ($provider == 'firstshowing')
		{
			return $this->getSingleFromFirstShowing($url);
		}

		return $this->getSingleFromScreenRant($url);
	}

	/**
	 * Scrapes and compiles news for saving from
	 * screenrant.com website.
	 *
	 * @return self
	 */
	private function getFromScreenRant()
	{
		$compiledNews = array();

		$news = $this->curl('http://screenrant.com/movie-news/');

		$crawler = new Crawler($news);

		//first we'll grab every news item on the page
		foreach ($crawler->filter('#content ul li') as $k => $node)
		{

			$cr = new Crawler($node);

			//then we will compile array out of every new items
			$compiledNews[$k] = array(
				'title'    => head($cr->filter('div > h2 > a')->extract(array('_text'))),
				'image'	   => head($cr->filter('div > a > img')->extract(array('src'))),
				'body'     => head($cr->filter('div > p')->extract(array('_text'))),
				'full_url' => head($cr->filter('div > h2 > a')->extract(array('href'))),
				'source'   => 'ScreenRant',
				'fully_scraped' => 0,
				);
		}

		$this->news = $compiledNews;

		return $this;
	}

	/**
	 * Saves scraped news to the database.
	 *
	 * @return void
	 */
	private function save()
	{
		$this->dbWriter->compileBatchInsert('news', $this->news)
					   ->save();
	}

	/**
	 * Scrapes single news item from screenrant
	 *
	 * @param  string $url
	 * @return string
	 */
	public function getSingleFromFirstShowing($url)
	{
		$item = $this->curl($url);

		$crawler = new Crawler($item);

		$html = $crawler->filter('.brand_words')->each(function (Crawler $node, $i)
		{
		    $ht = trim($node->html());

		    //filter out unneeded html


		    return '<p>' . preg_replace('/<a.*?>(.*?)<\/a>/', '$1', $ht) . '</p>';
		});

		return trim(implode('', $html));
	}

	/**
	 * Scrapes single news item from screenrant
	 *
	 * @param  string $url
	 * @return string
	 */
	public function getSingleFromScreenRant($url)
	{

		$text = '';
		$item = $this->curl($url);

		$crawler = new Crawler($item);

		$html = $crawler->filter('div[itemprop="articleBody"] p')->each(function (Crawler $node, $i)
		{
		    $ht = trim($node->html());

		    //filter out unneeded html
		    if (strpos($ht, 'contentjumplink')) return false;
		    if (strpos($ht, 'type="button"')) return false;
		    if (strpos($ht, 'type="hidden"')) return false;
		    if (strpos($ht, 'AD BLOCK')) return false;


		    if (strpos($ht, 'src='))
		    {
		    	preg_match('/.*?<img src="(.*?)"/', $ht, $m);

		    	if (isset($m[1]))
		    	{
		    		return "<img src='{$m[1]}' class='img-responsive'/>";
		    	}
		    }

		    return '<p>' . preg_replace('/<a.*?>(.*?)<\/a>/', '$1', $ht) . '</p>';
		});

		return trim(implode('', $html));
	}
}