<?php
/**
 * together functions and definitions
 *
 * @package together
 */

remove_action( 'after_setup_theme', 'eighties_custom_header_setup', 11 );

/**
 * Declare textdomain for this child theme.
 * Translations can be filed in the /languages/ directory.
 */
function together_setup() {
	load_child_theme_textdomain( 'together', get_stylesheet_directory() . '/languages' );

	add_editor_style( 'editor-style.css' );
}
add_action( 'after_setup_theme', 'together_setup' );

/*
 * Override custom background defaults
 */
function together_custom_background_args() {
	$args = array(
		'default-color'    => '',
		'default-image'    => '',
	);
	return $args;
}
add_filter( 'eighties_custom_background_args', 'together_custom_background_args' );

/*
 * Register our styles
 */
function together_scripts() {
	wp_register_style( 'eighties', get_template_directory_uri() . '/style.css' );
	wp_enqueue_style( 'together-fonts', together_google_fonts_url(), array(), null );
	wp_enqueue_style( 'together-style', get_stylesheet_uri(), array( 'eighties' ) );

	if ( together_header_image() ) {
		wp_enqueue_script( 'together-header', get_stylesheet_directory_uri() . '/js/together-header.js', array( 'backstretch' ), '20141125', true );
	}
}
add_action( 'wp_enqueue_scripts', 'together_scripts' );

/*
 * Styles and scripts with Eighties no longer needed
 */
function together_dequeue_scripts() {
	wp_dequeue_style( 'eighties-header' );
	wp_dequeue_style( 'eighties-headings' );
	wp_dequeue_script( 'eighties-customizer-preview' );
	wp_dequeue_script( 'eighties-header' );
}
add_action( 'wp_enqueue_scripts', 'together_dequeue_scripts', 20 );

/*
 * Go get our Google Fonts
 */
function together_google_fonts_url() {
	$fonts_url = '';

	/* Translators: If there are characters in your language that are not
	* supported by Gentium Book Basic, translate this to 'off'. Do not translate
	* into your own language.
	*/
	$gentium = _x( 'on', 'Gentium Book Basic font: on or off', 'together' );

	if ( 'off' !== $gentium ) {
		$font_families = array();

		if ( 'off' !== $gentium ) {
			$font_families[] = 'Gentium Book Basic:400italic,700,400,700italic';
		}

		$query_args = array(
			'family' => urlencode( implode( '|', $font_families ) ),
			'subset' => urlencode( 'latin,latin-ext' ),
		);

		$fonts_url = add_query_arg( $query_args, 'https://fonts.googleapis.com/css' );
	}

	return $fonts_url;
}

/*
 * Load Google Fonts on Custom Header page
 */
function together_custom_header_fonts() {
	wp_enqueue_style( 'together-fonts', together_google_fonts_url(), array(), null );
}
add_action( 'admin_print_styles-appearance_page_custom-header', 'together_custom_header_fonts' );

/**
 * Together Header Image
 *
 * Template tag for getting the Together header image
 * based on the custom setting for featured image or
 * header image.
 *
 * @return bool|string
 */
function together_header_image() {
	// If the current them does not support custom header, return false.
	if ( ! get_theme_support( 'custom-header' ) ) {
		return false;
	}

	// If is singular, has post thumbnail and is set to display the featured image, return the image.
	if ( is_singular() && has_post_thumbnail( get_the_ID() ) && 'featured_image' === get_theme_mod( 'eighties_singular_header_image', 'header' ) ) {
		$image = wp_get_attachment_image_src( get_post_thumbnail_id( get_the_ID() ), 'full' );

		return $image[0];
	}

	// If has the header image, return the header image.
	$header_image = get_header_image();
	if ( ! empty ( $header_image ) ) {
		return get_header_image();
	}

	return false;
}

/**
 * Add a new default custom header image
 * This replaces the default from our parent theme
 */
function together_custom_header_setup( $args ) {

	$args = array(
		'default-image'          => get_stylesheet_directory_uri() . '/img/together-header.png',
		'default-text-color'     => 'ffffff',
		'height'                 => 600,
		'width'                 => 1200,
		'flex-height'            => true,
		'flex-width'             => true,
		'wp-head-callback'       => 'together_header_style',
		'admin-head-callback'    => 'together_admin_header_style',
		'admin-preview-callback' => 'together_admin_header_image',
	);

	add_theme_support( 'custom-header', $args );

	// Default custom headers packaged with the theme. %s is a placeholder for the theme template directory URI.
	register_default_headers( array(
		'together' => array(
			'url'           => '%2$s/img/together-header.png',
			'thumbnail_url' => '%2$s/img/together-header-thumbnail.png',
			'description'   => _x( 'Together', 'header image description', 'together' )
		),
	) );
}
add_action( 'after_setup_theme', 'together_custom_header_setup' );

if ( ! function_exists( 'together_header_style' ) ) :
/**
 * Styles the header image and text displayed on the blog
 *
 * @see together_custom_header_setup().
 */
function together_header_style() {
	$header_text_color = get_header_textcolor();
	$header_image = together_header_image();
	$header = get_custom_header();

	// If no custom options for text are set, let's bail
	// get_header_textcolor() options: HEADER_TEXTCOLOR is default, hide text (returns 'blank') or any hex value
	if ( ( HEADER_TEXTCOLOR == $header_text_color ) && ! $header_image ) {
		return;
	}

	// If we get this far, we have custom styles. Let's do this.
	?>
	<style type="text/css">
	<?php
		// Has the text been hidden?
		if ( 'blank' == $header_text_color ) :
	?>
		.site-title,
		.site-description {
			position: absolute;
			clip: rect(1px, 1px, 1px, 1px);
		}
	<?php
		// If the user has set a custom color for the text use that
		else :
	?>
		.site-title a,
		.site-description {
			color: #<?php echo $header_text_color; ?>;
		}
	<?php endif; ?>

	<?php
		/* We have a header image, let's do something with it. */
		if ( $header_image ) :
	?>
		#masthead {
			background-image: url('<?php echo $header_image ?>');
			background-position: center center;
			background-repeat: no-repeat;
			background-size: cover;
		}
	<?php endif; ?>

	<?php if ( 'blank' == get_header_textcolor() ) : ?>
		<?php
			/* If the header height is different than 600, let's calculate a padding. */
			if ( 600 != $header->height ) :
		?>
			.site-branding {
				padding: <?php echo ( $header->height / 2 / 16 ); ?>em 0;
			}
		<?php else : ?>
			.site-branding {
				padding: 18.75em 0;
			}
		<?php endif; ?>
	<?php else : ?>
		<?php
			/* If the header height is different than 600, let's calculate a padding. */
			if ( 600 != $header->height ) :
		?>
			.site-branding {
				padding: <?php echo ( $header->height / 4 / 16 ) ?>em 0;
			}
		<?php endif; ?>
	<?php endif; ?>

	</style>
	<?php
}
endif; // together_header_style

if ( ! function_exists( 'together_admin_header_style' ) ) :
/**
 * Styles the header image displayed on the Appearance > Header admin panel.
 *
 * @see together_custom_header_setup().
 */
function together_admin_header_style() {
	$header = get_custom_header();

?>
	<style type="text/css">
		.appearance_page_custom-header #headimg {
			overflow: hidden;
			position: relative;
			background-color: #3c2b51;
			border: none;
			font-size: 16px;
			<?php if ( 'blank' == get_header_textcolor() ) : ?>
				<?php
					/* If the header height is different than 600, let's calculate a padding. */
					if ( 600 != $header->height ) :
				?>
					padding: <?php echo ( $header->height / 2 / 16 ); ?>em 0;
				<?php else : ?>
					padding: 15em 0;
				<?php endif; ?>
			<?php else :  ?>
				<?php
					/* If the header height is different than 600, let's calculate a padding. */
					if ( 600 != $header->height ) :
				?>
					padding: <?php echo ( $header->height / 4 / 16 ); ?>em 0;
				<?php else : ?>
					padding: 10em 0;
				<?php endif; ?>
			<?php endif; ?>
			<?php if ( get_header_image() ) : ?>
				background-image: url('<?php header_image(); ?>');
				background-repeat: no-repeat;
				background-size: cover;
				background-position: center center;
			<?php endif; ?>
		}
		.appearance_page_custom-header #headimg img {
			max-width: 100%;
		}
		#headimg .displaying-header-text {
			<?php if ( 'blank' == get_header_textcolor() ) : ?>
				display: none;
			<?php endif; ?>
			font-family: 'Gentium Book Basic', 'Open Sans', sans-serif;
			width: 100%;
			text-align: center;
		}
		#headimg .displaying-header-text a {
			text-decoration: none;
		}
		#headimg h1 {
			font-size: 72px;
			margin: 0 0 16px;
		}
		#headimg #desc {
			font-size: 36px;
		}
	</style>
<?php
}
endif; // together_admin_header_style

if ( ! function_exists( 'together_admin_header_image' ) ) :
/**
 * Custom header image markup displayed on the Appearance > Header admin panel.
 *
 * @see together_custom_header_setup().
 */
function together_admin_header_image() {
	$style = sprintf( 'style="color:#%s;"', get_header_textcolor() );
?>
	<div id="headimg">
		<div class="displaying-header-text">
			<h1><a id="name" <?php echo $style; ?> onclick="return false;" href="<?php echo esc_url( home_url( '/' ) ); ?>"><?php bloginfo( 'name' ); ?></a></h1>
			<div id="desc" <?php echo $style; ?>><?php bloginfo( 'description' ); ?></div>
		</div>
	</div>
<?php
}
endif; // together_admin_header_image

/**
 * Binds JS handlers to make Theme Customizer preview reload changes asynchronously.
 * Load a new script here because the default background color changes in Together
 */
function together_customize_preview_js() {
	wp_enqueue_script( 'together-customizer-preview', get_stylesheet_directory_uri() . '/js/customizer-preview.js', array( 'customize-preview' ), '20141125', true );
}
add_action( 'customize_preview_init', 'together_customize_preview_js' );


/**
 * Removes custom class in the array of body classes.
 *
 * @param array $classes Classes for the body element.
 * @return array
 */
function together_adjust_body_class( $classes ) {
	// We unset this class by Eighties so it can be reset by Together
	foreach ( $classes as $key => $value ) {
		if ( $value == 'has-custom-background' ) unset( $classes[ $key ] );
	}

	return $classes;

}

add_filter( 'body_class', 'together_adjust_body_class', 20 );

/**
 * Adds custom classes to the array of body classes.
 *
 * @param array $classes Classes for the body element.
 * @return array
 */
function together_body_class( $classes ) {

	// Adds a class of group-blog to blogs with more than 1 published author.
	if ( is_multi_author() ) {
		$classes[] = 'group-blog';
	}

	if ( is_singular() && has_post_thumbnail( get_the_ID() ) ) {
		$classes[] = 'single-has-thumbnail';
	}

	// Adds a class of has-custom-background to blogs with background settings different from default settings.
	if ( get_background_image() || '' != get_background_color() ) {
		$classes[] = 'has-custom-background';
	}

	return $classes;
}
add_filter( 'body_class', 'together_body_class', 30 );