<?php
/**
 * @package   DisplayFeaturedImageGenesis
 * @author    Robin Cornett <hello@robincornett.com>
 * @license   GPL-2.0+
 * @link      http://robincornett.com
 * @copyright 2014-2015 Robin Cornett Creative, LLC
 */

class Display_Featured_Image_Genesis_Output {

	protected $common;
	protected $description;
	protected $displaysetting;
	protected $item;

	/**
	 * set parameters for scripts, etc. to run.
	 *
	 * @since 1.1.3
	 */
	public function manage_output() {

		$settings             = new Display_Featured_Image_Genesis_Settings();
		$this->displaysetting = $settings->get_display_setting();
		$skip                 = $this->displaysetting['exclude_front'];
		$post_types           = array( 'attachment', 'revision', 'nav_menu_item' );
		$skipped_types        = apply_filters( 'display_featured_image_genesis_skipped_posttypes', $post_types );

		if ( is_admin() || ( in_array( get_post_type(), $skipped_types ) ) || ( $skip && is_front_page() ) ) {
			return;
		}

		$this->common = new Display_Featured_Image_Genesis_Common();
		$this->item   = Display_Featured_Image_Genesis_Common::get_image_variables();
		add_filter( 'jetpack_photon_override_image_downsize', '__return_true' );
		add_action( 'wp_enqueue_scripts', array( $this, 'load_scripts' ) );
	}

	/**
	 * enqueue plugin styles and scripts.
	 * @return enqueue
	 *
	 * @since  1.0.0
	 */
	public function load_scripts() {

		if ( ! $this->can_do_things() ) {
			return;
		}
		$css_file = apply_filters( 'display_featured_image_genesis_css_file', plugin_dir_url( __FILE__ ) . 'css/display-featured-image-genesis.css' );
		wp_enqueue_style( 'displayfeaturedimage-style', esc_url( $css_file ), array(), $this->common->version );
		add_filter( 'body_class', array( $this, 'add_body_class' ) );

		$large             = $this->common->minimum_backstretch_width();
		$width             = absint( $this->item->backstretch[1] );
		$force_backstretch = apply_filters( 'display_featured_image_genesis_force_backstretch', array() );

		if ( $width > $large || in_array( get_post_type(), $force_backstretch ) ) {
			$this->do_backstretch_image_things();
		} else {
			$this->do_large_image_things();
		}
	}

	/**
	 * set body class if featured images are displayed using the plugin
	 * @param filter $classes body_class
	 *
	 * @since  1.0.0
	 */
	public function add_body_class( $classes ) {
		if ( ! $this->can_do_things() ) {
			return $classes;
		}
		$large = $this->common->minimum_backstretch_width();
		$width = (int) $this->item->backstretch[1];
		if ( false === $this->item->content || ! is_singular() ) {
			if ( $width > $large ) {
				$classes[] = 'has-leader';
			} elseif ( $width <= $large ) {
				$classes[] = 'large-featured';
			}
		}
		return apply_filters( 'display_featured_image_genesis_classes', $classes );
	}

	/**
	 * All actions required to output the backstretch image
	 * @since 2.3.4
	 */
	protected function do_backstretch_image_things() {
		wp_register_script( 'displayfeaturedimage-backstretch', plugins_url( '/includes/js/backstretch.js', dirname( __FILE__ ) ), array( 'jquery' ), $this->common->version, true );
		wp_enqueue_script( 'displayfeaturedimage-backstretch-set', plugins_url( '/includes/js/backstretch-set.js', dirname( __FILE__ ) ), array( 'jquery', 'displayfeaturedimage-backstretch' ), $this->common->version, true );

		add_action( 'wp_print_scripts', array( $this, 'localize_scripts' ) );

		$hook     = apply_filters( 'display_featured_image_move_backstretch_image', 'genesis_after_header' );
		$priority = apply_filters( 'display_featured_image_move_backstretch_image_priority', 10 );
		add_action( esc_attr( $hook ), array( $this, 'do_backstretch_image_title' ), $priority );
	}

	/**
	 * Pass variables through to our js
	 * @return backstretchVars variable array to send to js
	 *
	 * @since 2.3.0
	 */
	public function localize_scripts() {
		// backstretch settings which can be filtered
		$backstretch_vars = apply_filters( 'display_featured_image_genesis_backstretch_variables', array(
			'centeredX' => true,
			'centeredY' => true,
			'fade'      => 750,
		) );

		$image_id = Display_Featured_Image_Genesis_Common::set_image_id();
		$large    = wp_get_attachment_image_src( $image_id, 'large' );
		$output   = array(
			'src'       => esc_url( $this->item->backstretch[0] ),
			'largesrc'  => esc_url( $large[0] ),
			'width'     => $large[1],
			'height'    => (int) $this->displaysetting['less_header'],
			'centeredX' => (int) (bool) $backstretch_vars['centeredX'],
			'centeredY' => (int) (bool) $backstretch_vars['centeredY'],
			'fade'      => (int) $backstretch_vars['fade'],
		);

		wp_localize_script( 'displayfeaturedimage-backstretch-set', 'BackStretchVars', $output );
	}

	/**
	 * backstretch image title ( for images which are larger than Media Settings > Large )
	 * @return image
	 *
	 * @since  1.0.0
	 */
	public function do_backstretch_image_title() {

		$this->description = new Display_Featured_Image_Genesis_Description();

		if ( $this->move_title() ) {
			$this->remove_title_descriptions();
		}

		echo '<div class="big-leader">';
		echo '<div class="wrap">';

		do_action( 'display_featured_image_genesis_before_title' );

		if ( $this->move_excerpts() ) {

			$this->do_title_descriptions();

		} elseif ( $this->move_title() ) { // if titles are being moved to overlay the image

			if ( ! empty( $this->item->title ) && $this->do_the_title() ) {
				echo wp_kses_post( $this->do_the_title() );
			}
			add_action( 'genesis_before_loop', array( $this, 'add_descriptions' ) );

		}

		do_action( 'display_featured_image_genesis_after_title' );

		// close wrap
		echo '</div>';

		// if javascript not enabled, do a fallback background image
		printf( '<noscript><div class="backstretch no-js" style="background-image: url(%s); }"></div></noscript>', esc_url( $this->item->backstretch[0] ) );

		// close big-leader
		echo '</div>';

		add_filter( 'jetpack_photon_override_image_downsize', '__return_false' ); // TODO remove
	}

	/**
	 * All actions required to output the large image
	 * @since 2.3.4
	 */
	protected function do_large_image_things() {
		remove_action( 'genesis_before_loop', 'genesis_do_cpt_archive_title_description' );
		add_action( 'genesis_before_loop', 'genesis_do_cpt_archive_title_description', 15 );

		$hook = 'genesis_before_loop';
		if ( is_singular() && ! is_page_template( 'page_blog.php' ) ) {
			$hook = apply_filters( 'display_featured_image_genesis_move_large_image', $hook );
		}
		$priority = apply_filters( 'display_featured_image_genesis_move_large_image_priority', 12 );
		add_action( esc_attr( $hook ), array( $this, 'do_large_image' ), $priority ); // works for both HTML5 and XHTML
	}

	/**
	 * Large image, centered above content
	 * @return image
	 *
	 * @since  1.0.0
	 */
	public function do_large_image() {
		$image_id      = Display_Featured_Image_Genesis_Common::set_image_id();
		$attr['class'] = 'aligncenter featured';
		$attr['alt']   = $this->item->title;
		$image         = wp_get_attachment_image( $image_id, 'large', false, $attr );
		$image         = apply_filters( 'display_featured_image_genesis_large_image_output', $image );
		echo wp_kses_post( $image );
	}

	/**
	 * Return the title.
	 * @return string title with markup.
	 *
	 * @since 2.3.1
	 */
	protected function do_the_title() {
		if ( is_front_page() && ! $this->description->show_front_page_title() ) {
			return;
		}
		$class        = is_singular() ? 'entry-title' : 'archive-title';
		$itemprop     = genesis_html5() ? 'itemprop="headline"' : '';
		$title        = $this->item->title;
		$title_output = sprintf( '<h1 class="%s featured-image-overlay" %s>%s</h1>', $class, $itemprop, $title );

		return apply_filters( 'display_featured_image_genesis_modify_title_overlay', $title_output, esc_attr( $class ), esc_attr( $itemprop ), $title );
	}

	/**
	 * Separate archive titles from descriptions. Titles show in leader image
	 * area; descriptions show before loop.
	 *
	 * @return descriptions
	 *
	 * @since  1.3.0
	 *
	 */
	public function add_descriptions() {

		$this->description->do_tax_description();
		$this->description->do_author_description();
		$this->description->do_cpt_archive_description();

	}

	/**
	 * Do title and description together (for excerpt output)
	 * @return title/description/excerpt
	 *
	 * @since 2.3.1
	 */
	protected function do_title_descriptions() {
		$this->description->do_front_blog_excerpt();
		$this->description->do_excerpt();
		genesis_do_taxonomy_title_description();
		genesis_do_author_title_description();
		genesis_do_cpt_archive_title_description();
	}

	/**
	 * Remove Genesis titles/descriptions
	 * @since 2.3.1
	 */
	protected function remove_title_descriptions() {
		if ( is_singular() && ! is_page_template( 'page_blog.php' ) ) {
			remove_action( 'genesis_entry_header', 'genesis_do_post_title' ); // HTML5
			remove_action( 'genesis_post_title', 'genesis_do_post_title' ); // XHTML
		}
		remove_action( 'genesis_before_loop', 'genesis_do_taxonomy_title_description', 15 );
		remove_action( 'genesis_before_loop', 'genesis_do_author_title_description', 15 );
		remove_action( 'genesis_before_loop', 'genesis_do_cpt_archive_title_description' );
		remove_action( 'genesis_before_loop', 'genesis_do_blog_template_heading' );
		remove_action( 'genesis_before_loop', 'genesis_do_posts_page_heading' );
	}

	/**
	 * Check whether plugin can output backstretch or large image
	 * @return boolean checks featured image size. returns true if can proceed; false if cannot
	 *
	 * @since 2.3.4
	 */
	protected function can_do_things() {
		$medium = (int) apply_filters( 'displayfeaturedimagegenesis_set_medium_width', get_option( 'medium_size_w' ) );
		$width  = (int) $this->item->backstretch[1];

		// check if they have enabled display on subsequent pages
		$is_paged = ! empty( $this->displaysetting['is_paged'] ) ? $this->displaysetting['is_paged'] : 0;
		// if there is no backstretch image set, or it is too small, or the image is in the content, or it's page 2+ and they didn't change the setting, die
		if ( empty( $this->item->backstretch ) || $width <= $medium || ( is_paged() && ! $is_paged ) || ( is_singular() && false !== $this->item->content ) ) {
			return false;
		}
		return true;
	}

	/**
	 * create a filter to not move excerpts if move excerpts is enabled
	 * @var filter
	 * @since  2.0.0 (deprecated old function from 1.3.3)
	 */
	protected function move_excerpts() {
		$move_excerpts = $this->displaysetting['move_excerpts'];
		$omit_excerpt  = apply_filters( 'display_featured_image_genesis_omit_excerpt', array() );

		if ( $move_excerpts && ! in_array( get_post_type(), $omit_excerpt ) ) {
			return true;
		}
		return false;
	}

	/**
	 * filter to maybe move titles, or not
	 * @var filter
	 * @since 2.2.0
	 */
	protected function move_title() {
		$do_not_move_title = apply_filters( 'display_featured_image_genesis_do_not_move_titles', array() );
		$keep_titles       = $this->displaysetting['keep_titles'];

		// if titles will be moved to overlay backstretch image
		if ( ! $keep_titles && ! in_array( get_post_type(), $do_not_move_title ) ) {
			return true;
		}
		return false;
	}
}