<?php

class PortableInfoboxRenderService extends WikiaService {
	const LOGGER_LABEL = 'portable-infobox-render-not-supported-type';
	const DESKTOP_THUMBNAIL_WIDTH = 270;
	const MOBILE_THUMBNAIL_WIDTH = 360;
	const MOBILE_TEMPLATE_POSTFIX = '-mobile';

	private $templates = [
		'wrapper' => 'PortableInfoboxWrapper.mustache',
		'title' => 'PortableInfoboxItemTitle.mustache',
		'header' => 'PortableInfoboxItemHeader.mustache',
		'image' => 'PortableInfoboxItemImage.mustache',
		'image-mobile' => 'PortableInfoboxItemImageMobile.mustache',
		'data' => 'PortableInfoboxItemData.mustache',
		'group' => 'PortableInfoboxItemGroup.mustache',
		'comparison' => 'PortableInfoboxItemComparison.mustache',
		'comparison-set' => 'PortableInfoboxItemComparisonSet.mustache',
		'comparison-set-header' => 'PortableInfoboxItemComparisonSetHeader.mustache',
		'comparison-set-item' => 'PortableInfoboxItemComparisonSetItem.mustache',
		'navigation' => 'PortableInfoboxItemNavigation.mustache'
		'hero-mobile' => 'PortableInfoboxItemHeroMobile.mustache'
	];
	private $templateEngine;

	function __construct() {
		$this->templateEngine = ( new Wikia\Template\MustacheEngine )
			->setPrefix( dirname( __FILE__ ) . '/../templates' );
	}

	/**
	 * renders infobox
	 *
	 * @param array $infoboxdata
	 *
	 * @return string - infobox HTML
	 */
	public function renderInfobox( array $infoboxdata, $theme, $layout ) {
		wfProfileIn( __METHOD__ );
		$infoboxHtmlContent = '';
		$heroData = [ ];

		foreach ( $infoboxdata as $item ) {
			$data = $item[ 'data' ];
			$type = $item[ 'type' ];

			switch ( $type ) {
				case 'comparison':
					$infoboxHtmlContent .= $this->renderComparisonItem( $data[ 'value' ] );
					break;
				case 'group':
					$infoboxHtmlContent .= $this->renderGroup( $data );
					break;
				case 'navigation':
					$infoboxHtmlContent .= $this->renderItem( 'navigation', $data );
					break;
				default:
					if ( $this->isInfoboxHeroEnabled() && $this->isValidHeroDataItem( $item, $heroData ) ) {
						$heroData[ $type ] = $data;
						continue;
					}

					if ( $this->validateType( $type ) ) {
						$infoboxHtmlContent .= $this->renderItem( $type, $data );
					};
			}
		}

		if ( !empty( $heroData ) ) {
			$infoboxHtmlContent = $this->renderInfoboxHero( $heroData ) . $infoboxHtmlContent;
		}

		if ( !empty( $infoboxHtmlContent ) ) {
			$output = $this->renderItem( 'wrapper', [ 'content' => $infoboxHtmlContent, 'theme' => $theme, 'layout' => $layout ] );
		} else {
			$output = '';
		}

		wfProfileOut( __METHOD__ );

		return $output;
	}

	/**
	 * renders comparison infobox component
	 *
	 * @param array $comparisonData
	 *
	 * @return string - comparison HTML
	 */
	private function renderComparisonItem( $comparisonData ) {
		$comparisonHTMLContent = '';

		foreach ( $comparisonData as $set ) {
			$setHTMLContent = '';

			foreach ( $set[ 'data' ][ 'value' ] as $item ) {
				$type = $item[ 'type' ];

				if ( $type === 'header' ) {
					$setHTMLContent .= $this->renderItem(
						'comparison-set-header',
						[ 'content' => $this->renderItem( $type, $item[ 'data' ] ) ]
					);
				} else {
					if ( $this->validateType( $type ) ) {
						$setHTMLContent .= $this->renderItem(
							'comparison-set-item',
							[ 'content' => $this->renderItem( $type, $item[ 'data' ] ) ]
						);
					}
				}
			}

			$comparisonHTMLContent .= $this->renderItem( 'comparison-set', [ 'content' => $setHTMLContent ] );
		}

		if ( !empty( $comparisonHTMLContent ) ) {
			$output = $this->renderItem( 'comparison', [ 'content' => $comparisonHTMLContent ] );
		} else {
			$output = '';
		}

		return $output;
	}

	/**
	 * renders group infobox component
	 *
	 * @param array $groupData
	 *
	 * @return string - group HTML markup
	 */
	private function renderGroup( $groupData ) {
		$groupHTMLContent = '';
		$dataItems = $groupData[ 'value' ];
		$layout = $groupData[ 'layout' ];

		foreach ( $dataItems as $item ) {
			$type = $item[ 'type' ];

			if ( $this->validateType( $type ) ) {
				$groupHTMLContent .= $this->renderItem( $type, $item[ 'data' ] );
			}
		}

		return $this->renderItem( 'group', [ 'content' => $groupHTMLContent, 'layout' => $layout ] );
	}

	/**
	 * renders part of infobox
	 *
	 * @param string $type
	 * @param array $data
	 *
	 * @return string - HTML
	 */
	private function renderItem( $type, array $data ) {
		//TODO: with validated the performance of render Service and in the next phase we want to refactor it (make
		// it modular) While doing this we also need to move this logic to appropriate image render class
		if ( $type === 'image' ) {
			$data = $this->extendImageData( $data );

			if ( $this->isWikiaMobile() ) {
				$type = $type . self::MOBILE_TEMPLATE_POSTFIX;
			}
		}

		return $this->templateEngine->clearData()
			->setData( $data )
			->render( $this->templates[ $type ] );
	}

	/**
	 * @desc returns the thumbnail url
	 *
	 * @param string $title
	 *
	 * @return string thumbnail url
	 */
	protected function getThumbnailUrl( $title ) {
		$file = \WikiaFileHelper::getFileFromTitle( $title );

		if ( $file ) {
			return $file->createThumb(
				$this->isWikiaMobile() ?
					self::MOBILE_THUMBNAIL_WIDTH :
					self::DESKTOP_THUMBNAIL_WIDTH
			);
		}

		return '';
	}

	/**
	 * required for testing mobile template rendering
	 * @return bool
	 */
	protected function isWikiaMobile() {
		return F::app()->checkSkin( 'wikiamobile' );
	}

	/**
	 * check if item type is supported and logs unsupported types
	 *
	 * @param string $type - template type
	 *
	 * @return bool
	 */
	private function validateType( $type ) {
		$isValid = true;

		if ( !isset( $this->templates[ $type ] ) ) {
			Wikia\Logger\WikiaLogger::instance()->info( self::LOGGER_LABEL, [
				'type' => $type
			] );

			$isValid = false;
		}

		return $isValid;
	}

	/**
	 * returns true if infobox hero component should be rendered
	 *
	 * @return bool
	 */
	private function isInfoboxHeroEnabled() {
		return $this->isWikiaMobile();
	}

	/**
	 * checks if infobox data item is valid hero component data
	 *
	 * @param array $item - infobox data item
	 * @param array $heroData - hero component data
	 *
	 * @return bool
	 */
	private function isValidHeroDataItem( $item, $heroData ) {
		$isValid = false;
		$type = $item[ 'type' ];

		if (
			$type === 'title' && !array_key_exists( 'title', $heroData ) ||
			$type === 'image' && !array_key_exists( 'image', $heroData )
		) {
			$isValid = true;
		}

		return $isValid;
	}

	/**
	 * renders infobox hero component
	 *
	 * @param array $data - infobox hero component data
	 *
	 * @return string
	 */
	private function renderInfoboxHero( $data ) {
		if ( array_key_exists( 'image', $data ) ) {
			$data[ 'image' ] = $this->extendImageData( $data[ 'image' ] );
			$markup = $this->renderItem( 'hero-mobile', $data );
		} else {
			$markup = $this->renderItem( 'title', $data[ 'title' ] );
		}

		return $markup;
	}

	/**
	 * extends image data
	 *
	 * @param array $data
	 *
	 * @return array
	 */
	private function extendImageData( $data ) {
		$data[ 'thumbnail' ] = $this->getThumbnailUrl( $data[ 'name' ] );
		$data[ 'key' ] = urlencode( $data[ 'key' ] );

		return $data;
	}
}