<?php
/**
 * Compatibility settings and functions for WP.com.
 * Kept in separate file easier merging and separation of concerns.
 *
 * @package WordPress
 * @subpackage Twenty_Thirteen
 */

/**
 * Theme Colors (old skool)
 */
if ( ! isset( $themecolors ) ) {
	$themecolors = array(
		'bg'     => 'ffffff',
		'border' => 'c3c0ab',
		'text'   => '141412',
		'link'   => 'f24b12',
		'url'    => 'f24b12',
	);
}

/**
 * De-queue Google fonts if custom fonts are being used.
 *
 * @return void
 */
function twentythirteen_wpcom_fonts() {
	if ( class_exists( 'TypekitData' ) && class_exists( 'CustomDesign' ) ) {
		if ( CustomDesign::is_upgrade_active() ) {
			$customfonts = TypekitData::get( 'families' );
			if ( $customfonts && $customfonts['site-title']['id'] && $customfonts['headings']['id'] && $customfonts['body-text']['id'] )
				wp_dequeue_style( 'twentythirteen-fonts' );
		}
	}
}
add_action( 'wp_enqueue_scripts', 'twentythirteen_wpcom_fonts' );

/**
 * Enqueue our WP.com styles for front-end.
 * Loads after style.css so we can add overrides.
 */
function twentythirteen_wpcom_styles() {
	wp_enqueue_style( 'twentythirteen-wpcom-style', get_template_directory_uri() . '/css/style-wpcom.css', array( 'twentythirteen-style' ), '2013-07-22' );

	if ( is_rtl() ) {
		wp_enqueue_style( 'twentythirteen-wpcom-rtl-style', get_template_directory_uri() . '/css/style-wpcom-rtl.css', array( 'twentythirteen-style', 'twentythirteen-wpcom-style' ), '2013-07-22' );
	}
}
add_action( 'wp_enqueue_scripts', 'twentythirteen_wpcom_styles' );

/**
 * Adjusts content_width value for youtube videos in video post formats.
 *
 * @param int YouTube video width.
 * @return int Filtered YouTube video width.
 */
function twentythirteen_wpcom_youtube_video_width( $width ) {
	if ( has_post_format( 'video' ) )
		$width = 724;

	return $width;
}
add_filter( 'youtube_width', 'twentythirteen_wpcom_youtube_video_width' );

/**
 * Adjusts the height value for youtube videos in video post formats.
 *
 * @param int YouTube video height.
 * @return int Filtered YouTube video height.
 */
function twentythirteen_wpcom_youtube_video_height( $height ) {
	if ( has_post_format( 'video' ) )
		$height = 437; // Educated guess: 16:9.

	return $height;
}
add_filter( 'youtube_height', 'twentythirteen_wpcom_youtube_video_height' );

// @TODO: Vimeo

/**
 * Gets a medium size image instead of thumbnail when embedding images from
 * Instagram with an embed or bare URL.
 * This currently fails because Instagram's minimum size for medium is 612,
 * and Twenty Thirteen has 604 set as content_width.
 *
 * @param string Provider.
 * @param string Embedded URL.
 * @param array Passed arguments for this oEmbed provider.
 * @return string If Instagram isn't the provider or if image is smaller than
 * required, or function call add_query_arg() to override maxwidth in the API
 * call to get the medium size image.
 */
function twentythirteen_wpcom_instagram_oembed( $provider, $url, $args ) {
	if ( 0 !== strpos( $provider, 'http://api.instagram.com/oembed' ) && $args['width'] < 612 )
		return $provider;

	return add_query_arg( 'maxwidth', 612, $provider );
}
add_filter( 'oembed_fetch_url', 'twentythirteen_wpcom_instagram_oembed', 10, 3 );

/**
 * Registers a custom image sizes for gallery post formats, to be used on the
 * index/search/archive views to show a larger thumbnail for the first image
 * in the grid layout.
 *
 * @return void
 */
function twentythirteen_wpcom_gallery_image_size() {
	add_image_size( 'twentythirteen-gallery-post', 300, 300, true );
}
add_action( 'after_setup_theme', 'twentythirteen_wpcom_gallery_image_size' );

/**
 * Sets the image size in featured galleries to large.
 * This was dropped from core theme in
 *
 * @param array $atts Combined and filtered attribute list.
 * @return array The filtered attribute list.
 */
function twentythirteen_wpcom_gallery_atts( $atts ) {
	if ( has_post_format( 'gallery' ) && ! is_single() )
		$atts['size'] = wp_is_mobile() ? 'thumbnail' : 'twentythirteen-gallery-post';

	return $atts;
}
add_filter( 'shortcode_atts_gallery', 'twentythirteen_wpcom_gallery_atts' );

/**
 * Add theme support for Responsive Videos for WP.com
 */
function twentythirteen_responsive_videos_init() {
	add_theme_support( 'jetpack-responsive-videos' );
}
add_action( 'after_setup_theme', 'twentythirteen_responsive_videos_init' );