<?php
/**
* The main application class
*
* This class is responsible to load all necessary assets, caching, theme activation, etc.
*
* @package WordPress
* @subpackage Apola
* @since Apola 1.0
*/

// Prevent the direct loading of the file
if ( ! defined( 'ABSPATH' ) ) {
	die( esc_html__('You cannot access this file directly', 'apola') );
}

class Apola
{
	/**
	 * Contains an Apola_Admin object.
	 *
	 * @access protected
	 * @var ApolaAdmin
	 */
	protected $admin;

	/**
	 * Contains an Apola_Helper object.
	 *
	 * @access protected
	 * @var Apola_Helper
	 */
	protected $helper;

    /**
	 * The one, true instance of the Apola object.
	 *
	 * @static
	 * @access protected
	 * @var null|object
	 */
    protected static $instance;

    /**
	 * Contains uri of the template directory.
	 *
	 * @access protected
	 * @var null|string
	 */
    protected $template_dir;

	/**
	 * Contains the current page type (default, blogroll, portfolio, etc.).
	 *
	 * @access protected
	 * @var null|string
	 */
	protected $current_page_type;

	/**
	 * Contains the current page style (portfolio/gallery (slideshow, striped-carousel, full-page, masonry, etc.)).
	 *
	 * @access protected
	 * @var null|string
	 */
	protected $current_page_style;

	/**
	 * Contains an array of plugins that theme uses.
	 *
	 * @access protected
	 * @var array
	 */
	protected $bundled_plugins = array();

	/**
	 * Contains default fonts settings of the theme.
	 *
	 * @access protected
	 * @var array
	 */
	protected $google_fonts = array(
		'Poppins' => array('300', '300italic', '400', '400italic', '500', '500italic', '600', '600italic', '700', '700italic', '800', '800italic', '900', '900italic'),
		'Abril Fatface' => array('300', '300italic', '400', '400italic', '500', '500italic', '600', '600italic', '800', '800italic'),
		'Unna' => array('300', '300italic', '400', '400italic', '500', '500italic', '600', '600italic', '800', '800italic')
	);

	/**
	 * Contains default charsets for the fonts of the theme.
	 *
	 * @access protected
	 * @var array
	 */
	protected $google_fonts_charsets = array('latin', 'latin-ext');

    /**
	 * Returns the instance of the Apola class.
	 *
	 * @static
	 * @access public
     * @return Apola
	 */
    public static function getInstance() {
        if( !isset( self::$instance ) ) {
            self::$instance = new self();
        }

        return self::$instance;
    }

    /**
	 * Constructor of the class.
	 */
    public function __construct(ConfigurableInterface $admin = null, $helper = null) {

		$this->admin = $admin;
		$this->helper = $helper;

        add_action('wp_enqueue_scripts', array($this, 'registerAssets'));
		add_filter('body_class', array($this, 'bodyClasses'));

        $this->template_dir = defined('APOLA_TEMPLATE_DIRECTORY_URI') ? APOLA_TEMPLATE_DIRECTORY_URI : get_template_directory_uri();


		$this->addRequiredThemePlugins(array(
			array(
				'name'               => esc_html__('Apola Theme Functionality', 'apola'),
				'slug'               => 'apola-theme-functionality',
				'source'             => 'apola/pluginus/apola-theme-functionality.zip',
				'required'           => true,
				'version'            => '1.0.0',
			),
			array(
				'name'               => esc_html__('Meta Box Conditional Logic', 'apola'),
				'slug'               => 'meta-box-conditional-logic',
				'source'             => 'apola/pluginus/meta-box-conditional-logic.zip',
				'required'           => true,
				'version'            => '1.5.0'
			),
			array(
				'name'               => esc_html__('Slider Revolution', 'apola'),
				'slug'               => 'revslider',
				'source'             => 'apola/pluginus/revslider.zip',
				'required'           => false,
				'version'            => '5.4.7.2'
			),
			array(
				'name'               => esc_html__('WPBakery Page Builder', 'apola'),
				'slug'               => 'js_composer',
				'source'             => 'pluginus/js_composer.zip',
				'required'           => true,
				'version'            => '5.4.7'
			)
		));

		add_action('apola_page_prepend', array($this, 'prependToThePageContent'));

		add_action('customize_register', array($this, 'modifyCustomizer'));
    }

    /**
	 * Registers assets.
	 *
	 * @access protected
     * @return Apola
	 */
    public function registerAssets() {

		$this->current_page_type = $this->getThemeOption('apola-page-type', 'apola-default', array(
			'overriden_by' => 'apola-page-type-individual',
			'depend_on' => array('key' => 'apola-page-settings-inherit-individual', 'value' => 0)
		));

		$this->current_page_style = $this->getThemeOption('apola-page-type-portfolio-gallery-page-style', 'apola-grid');

		// order is important
        return $this->registerStyles()
					->integrateTypographySettings()
					->registerFonts()
					->registerInlineStyles()
					->registerScripts()
					->registerInlineScripts();
    }

	/**
	 * Adds necessary classes to the body element.
	 *
	 * @access public
	 * @return array
	 */
	public function bodyClasses( $classes ) {

		$apola_header_type = $this->getThemeOption('apola-header-type', 'apola-header-side', array(
			'overriden_by' => 'apola-page-header-type-individual',
			'depend_on' => array( 'key' => 'apola-page-header-state-individual', 'value' => '0' )
		));

		$apola_side_header_position = $this->getThemeOption('apola-header-side-position', 'apo-header-vertical-left', array(
			'overriden_by' => 'apola-page-header-side-position-individual',
			'depend_on' => array( 'key' => 'apola-page-header-state-individual', 'value' => '0' )
		));

		$apola_pages_skin = $this->getThemeOption('apola-page-skin', 'apo-page-light-skin', array(
			'overriden_by' => 'apola-page-skin-individual',
			'depend_on' => array( 'key' => 'apola-page-skin-state-individual', 'value' => 0 )
		));

		if(is_singular(array('page'))) {
			$page_type = $this->getThemeOption('apola-page-type', 'apola-default', array(
				'overriden_by' => 'apola-page-type-individual',
				'depend_on' => array( 'key' => 'apola-page-settings-inherit-individual', 'value' => 0 )
			));
			$portfolio_page_style = $this->getThemeOption('apola-page-type-portfolio-gallery-page-style');

			if($page_type == 'apola-fullpage-fixed-image') {
				array_push($classes, 'apo-full-page-fixed-content');
			}
			elseif($page_type == 'apola-fullpage') {
				$apola_controls_slide_numbers = $this->getThemeOption('apola-page-type-fullpage-slide-numbers-state', 1);
				$apola_controls_navigation = $this->getThemeOption('apola-page-type-fullpage-navigation-state', 1);
				$apola_controls_languages = $this->getThemeOption('apola-page-type-fullpage-languages-state', 1);

				if($apola_controls_slide_numbers == 1 || $apola_controls_navigation == 1 || $apola_controls_languages == 1) {
					array_push($classes, 'apo-has-full-page-controls');
				}
			}
			elseif(in_array($portfolio_page_style, array('apola-full-page', 'apola-striped-carousel'))) {

				$page_style_light_skin = array_search('apo-page-light-skin', $classes);
				if($page_style_light_skin !== false) unset($classes[$page_style_light_skin]);

				array_push($classes, 'apo-page-dark-skin');
				if($portfolio_page_style == 'apola-full-page') array_push($classes, 'apo-fp-photo-stream');
			}
		}

		array_push($classes, $apola_pages_skin);

		if($apola_header_type == 'apola-header-side' && $apola_side_header_position == 'apo-header-vertical-left') {
			array_push($classes, 'apo-header-vertical-left');
			array_push($classes, 'apo-hidden-column-left');
		}
		elseif($apola_header_type == 'apola-header-side' && $apola_side_header_position == 'apo-header-vertical-right') {
			array_push($classes, 'apo-header-vertical-right');
			array_push($classes, 'apo-hidden-column-right');
		}

		if(is_singular('apola-galleries')) {
			$apola_gallery_builder = get_post_meta(get_queried_object_id(), 'apola_gallery_builder', true);

			if(isset($apola_gallery_builder['sliders']) && is_array($apola_gallery_builder['sliders']) && isset($apola_gallery_builder['sliders']['single-page-type'])) {
				switch($apola_gallery_builder['sliders']['single-page-type']) {
					case 'striped-carousel':
						$page_style_light_skin = array_search('apo-page-light-skin', $classes);
						if($page_style_light_skin !== false) unset($classes[$page_style_light_skin]);

						array_push($classes, 'apo-page-dark-skin');
					break;
					case 'full-page' :
						$page_style_light_skin = array_search('apo-page-light-skin', $classes);
						if($page_style_light_skin !== false) unset($classes[$page_style_light_skin]);

						array_push($classes, 'apo-fp-photo-stream');
						array_push($classes, 'apo-page-dark-skin');
					break;
				}
			}
		}

		return $classes;
	}

    /**
	 * Registers necessary styles.
	 *
	 * @access protected
     * @return Apola
	 */
    protected function registerStyles() {
		wp_register_style( 'rev-slider', $this->template_dir . '/assets/vendors/revolution/css/settings.css', array(), '5.4.1' );
		wp_register_style( 'swiper-slider', $this->template_dir . '/assets/vendors/swiper/swiper.min.css', array(), '3.4.2' );
		wp_register_style( 'fullpage', $this->template_dir . '/assets/vendors/fullpage/jquery.fullpage.min.css', array(), '2.9.4' );

		wp_enqueue_style( 'apola-reset', $this->template_dir . '/assets/css/reset.min.css', array(), '1.0.0');
        wp_enqueue_style( 'bootstrap', $this->template_dir . '/assets/css/bootstrap.min.css', array(), '3.3.7' );
        wp_enqueue_style( 'fontawesome', $this->template_dir . '/assets/css/font-awesome.min.css', array(), '4.7.0' );
        wp_enqueue_style( 'linearicons', $this->template_dir . '/assets/css/linearicons.css', array(), '1.0.0' );
        wp_enqueue_style( 'animate-css', $this->template_dir . '/assets/css/animate.css', array(), '3.5.1' );
        wp_enqueue_style( 'hamburgers', $this->template_dir . '/assets/css/hamburgers.min.css', array(), '1.0.0' );
        wp_enqueue_style( 'fancybox', $this->template_dir . '/assets/vendors/fancybox/jquery.fancybox.min.css', array(), '3.3.4' );
        wp_enqueue_style( 'custom-scrollbar', $this->template_dir . '/assets/vendors/mCustomScrollbar/jquery.mCustomScrollbar.min.css', array(), '3.1.5' );
        wp_enqueue_style( 'arctic-modal', $this->template_dir . '/assets/vendors/arcticmodal/jquery.arcticmodal-0.3.css', array(), '0.0.3' );
        wp_enqueue_style( 'owl-carousel', $this->template_dir . '/assets/vendors/owl-carousel/assets/owl.carousel.min.css', array(), '2.2.1' );

		wp_enqueue_style( 'apola-icons', $this->template_dir . '/assets/css/apola-icons.css', array(), '1.0.0' );
        wp_enqueue_style( 'apola-style', $this->template_dir . '/style.css', array('bootstrap', 'fontawesome', 'linearicons', 'apola-icons', 'fullpage'), '1.0.0' );

		if(is_singular('apola-galleries')) {
			wp_enqueue_style('rev-slider');
			wp_enqueue_style('swiper-slider');

			$apola_gallery_builder = get_post_meta(get_queried_object_id(), 'apola_gallery_builder', true);

			if(isset($apola_gallery_builder['sliders']) && is_array($apola_gallery_builder['sliders']) && isset($apola_gallery_builder['sliders']['single-page-type'])) {
				switch($apola_gallery_builder['sliders']['single-page-type']) {
					case 'full-page':
						wp_enqueue_style('fullpage');
					break;
				}
			}
		}

		switch($this->current_page_type) {
			case 'apola-portfolio-gallery' :
				switch($this->current_page_style) {
					case 'apola-slideshow':
						wp_enqueue_style('rev-slider');
						wp_enqueue_style('swiper-slider');
					break;
					case 'apola-full-page':
						wp_enqueue_style('fullpage');
					break;
				}
			break;

			case 'apola-fullpage':
			case 'apola-fullpage-fixed-image':
				wp_enqueue_style('fullpage');
			break;
		}

        return $this;
    }

	/**
	 * Registers necessary inline stylesheets.
	 *
	 * @access protected
	 * @return Apola
	 */
	protected function registerInlineStyles()
	{

		$background_is_blurred = $this->getThemeOption('apola-page-background-image-is-blurred-individual', 0);

		switch($this->current_page_type) {
			case 'apola-portfolio-gallery' :
				switch($this->current_page_style) {
					case 'apola-slideshow':
						wp_add_inline_style('apola-style', $this->helper()->getPlainCSS( array('html:not(.apo-with-wp-admin-bar-offset)'), array('margin-top' => '0px !important'), array('min-width', '783px')));
					break;
				}
			break;
		}

		if(is_singular('apola-galleries')) {
			$apola_gallery_builder = get_post_meta(get_queried_object_id(), 'apola_gallery_builder', true);

			if(isset($apola_gallery_builder['sliders']) && is_array($apola_gallery_builder['sliders']) && isset($apola_gallery_builder['sliders']['single-page-type'])) {
				switch($apola_gallery_builder['sliders']['single-page-type']) {
					case 'slideshow':
						wp_add_inline_style('apola-style', $this->helper()->getPlainCSS( array('html:not(.apo-with-wp-admin-bar-offset)'), array('margin-top' => '0px !important'), array('min-width', '783px')));
					break;
				}
			}
		}

		if($background_is_blurred == 0) $this->setCurrentPageBackgroundSharp();
		return $this;
	}

    /**
	 * Registers necessary scripts.
	 *
	 * @access protected
     * @return Apola
	 */
    protected function registerScripts() {
		wp_register_script( 'swiper-slider', $this->template_dir . '/assets/vendors/swiper/swiper.min.js', array('jquery'), '3.4.2', true );
		wp_register_script( 'rev-slider-tools', $this->template_dir . '/assets/vendors/revolution/js/jquery.themepunch.tools.min.js', array('jquery'), '5.4.1', true );
		wp_register_script( 'rev-slider', $this->template_dir . '/assets/vendors/revolution/js/jquery.themepunch.revolution.min.js', array('jquery'), '5.4.1', true );
		wp_register_script( 'fullpage-scrolloverflow', $this->template_dir . '/assets/vendors/fullpage/vendors/scrolloverflow.min.js', array('jquery'), '2.9.4', true );
        wp_register_script( 'fullpage', $this->template_dir . '/assets/vendors/fullpage/jquery.fullpage.min.js', array('jquery'), '2.9.4', true );

		wp_register_script( 'apola-fullpage-wrapper', $this->template_dir . '/assets/js/modules/apola.fullpage.js', array('jquery', 'apola-core'), '1.0.0', true );

        wp_enqueue_script( 'modernizr', $this->template_dir . '/assets/vendors/modernizr.js', array(), '3.3.1' );
        wp_enqueue_script( 'isotope', $this->template_dir . '/assets/vendors/isotope.pkgd.min.js', array('jquery'), '3.0.3', true );
        wp_enqueue_script( 'jquery-easings', $this->template_dir . '/assets/vendors/jquery.easing.1.3.min.js', array('jquery'), '1.3.0', true );
		wp_enqueue_script( 'appear', $this->template_dir . '/assets/vendors/jquery.appear.min.js', array('jquery'), '1.0.3', true );
		wp_enqueue_script( 'owl-carousel', $this->template_dir . '/assets/vendors/owl-carousel/owl.carousel.min.js', array('jquery'), '2.2.1', true );
        wp_enqueue_script( 'fancybox', $this->template_dir . '/assets/vendors/fancybox/jquery.fancybox.min.js', array('jquery'), '3.3.4', true );
        wp_enqueue_script( 'wt-nav', $this->template_dir . '/assets/vendors/wt.jquery.nav.1.0.js', array('jquery'), '1.0.0', true );
		wp_enqueue_script( 'wat-sameheight', $this->template_dir . '/assets/vendors/wat.sameheight.js', array('jquery'), '1.0.0', true );
		wp_enqueue_script( 'mad-custom-select', $this->template_dir . '/assets/vendors/mad.customselect.js', array('jquery'), '1.0.0', true );
        wp_enqueue_script( 'custom-scrollbar', $this->template_dir . '/assets/vendors/mCustomScrollbar/jquery.mCustomScrollbar.concat.min.js', array('jquery'), '3.1.5', true );
		wp_enqueue_script( 'arctic-modal', $this->template_dir . '/assets/vendors/arcticmodal/jquery.arcticmodal-0.3.min.js', array('jquery'), '0.0.3', true );

		wp_enqueue_script( 'apola-core', $this->template_dir . '/assets/js/apola.core.js', array('jquery', 'appear'), '1.0.0', true );
        wp_enqueue_script( 'apola-sameheight', $this->template_dir . '/assets/js/modules/apola.sameheight.js', array('jquery', 'apola-core'), '1.0.0', true );
        wp_enqueue_script( 'apola-isotope-wrapper', $this->template_dir . '/assets/js/modules/apola.isotope.js', array('jquery', 'apola-core'), '1.0.0', true );
        wp_enqueue_script( 'apola-parallax-grid', $this->template_dir . '/assets/js/modules/apola.parallax-grid.js', array('jquery', 'apola-core'), '1.0.0', true );
        wp_enqueue_script( 'apola-init', $this->template_dir . '/assets/js/apola.init.js', array('jquery'), '1.0.0', true );

		if ( is_singular() && comments_open() && get_option( 'thread_comments' ) ) {
            wp_enqueue_script( 'comment-reply' );
        }

		if(is_singular('apola-galleries')) {
			wp_enqueue_script('rev-slider-tools');
			wp_enqueue_script('rev-slider');
			wp_enqueue_script('swiper-slider');

			$apola_gallery_builder = get_post_meta(get_queried_object_id(), 'apola_gallery_builder', true);

			if(isset($apola_gallery_builder['sliders']) && is_array($apola_gallery_builder['sliders']) && isset($apola_gallery_builder['sliders']['single-page-type'])) {
				switch($apola_gallery_builder['sliders']['single-page-type']) {
					case 'full-page':
						wp_enqueue_script('fullpage-scrolloverflow');
						wp_enqueue_script('fullpage');
						wp_enqueue_script('apola-fullpage-wrapper');
					break;
				}
			}
		}

		switch($this->current_page_type) {
			case 'apola-portfolio-gallery' :
				switch($this->current_page_style) {
					case 'apola-slideshow':
						wp_enqueue_script('rev-slider-tools');
						wp_enqueue_script('rev-slider');
						wp_enqueue_script('swiper-slider');
					break;
					case 'apola-full-page':
						wp_enqueue_script('fullpage-scrolloverflow');
						wp_enqueue_script('fullpage');
						wp_enqueue_script('apola-fullpage-wrapper');
					break;
				}
			break;
			case 'apola-fullpage' :
			case 'apola-fullpage-fixed-image' :
				wp_enqueue_script('fullpage-scrolloverflow');
				wp_enqueue_script('fullpage');
				wp_enqueue_script('apola-fullpage-wrapper');
			break;
		}

        return $this;
    }

	/**
	 * Register necessary inline scripts.
	 *
	 * @access protected
	 * @return Apola
	 */
	protected function registerInlineScripts()
	{
		$footer_type = $this->getThemeOption('apola-footer-style', 'apola-footer-widget-area', array(
			'overriden_by' => 'apola-page-footer-style-individual',
			'depend_on' => array( 'key' => 'apola-page-footer-state-individual', 'value' => '0' )
		));

		if($footer_type == 'apola-footer-widget-area') {
			$footer_widgets_geometry = $this->getThemeOption('apola-footer-widget-area-widgets-geometry', null);
			$footer_widgets_geometry_prepared = array();

			if($footer_widgets_geometry) {
				foreach($footer_widgets_geometry as $row_key => $row) {
					foreach($row as $column_key => $column) {
						array_push($footer_widgets_geometry_prepared, $column);
					}
				}
			}

			if(is_array($footer_widgets_geometry_prepared) && count($footer_widgets_geometry_prepared)) {
				wp_localize_script('apola-core', 'ApolaFooterWidgetsGeometry', $footer_widgets_geometry_prepared);
			}
		}


		wp_localize_script('apola-core', 'ApolaOptions', array(
			'preloader' => $this->getThemeOption('page-loader-state', '0')
		));

		wp_localize_script('apola-core', 'ApolaAJAXData', array(
			'url' => admin_url('admin-ajax.php'),
			'AJAX_token' => wp_create_nonce('apola-ajax-nonce')
		));

		wp_localize_script('apola-init', 'ApolaLocalizationData', array(
			'prevButtonText' => esc_html__('Prev', 'apola'),
			'nextButtonText' => esc_html__('Next', 'apola')
		));

		wp_localize_script('apola-init', 'ApolaFancyboxI18N', array(
			'CLOSE' => esc_html__('Close', 'apola'),
			'NEXT' => esc_html__('Next', 'apola'),
			'PREV' => esc_html__('Previous', 'apola'),
			'ERROR' => esc_html__('The requested content cannot be loaded. Please try again later.', 'apola'),
			'PLAY_START' => esc_html__('Start slideshow', 'apola'),
			'PLAY_STOP' => esc_html__('Pause slideshow', 'apola'),
			'FULL_SCREEN' => esc_html__('Full screen', 'apola'),
			'THUMBS' => esc_html__('Thumbnails', 'apola'),
			'DOWNLOAD' => esc_html__('Download', 'apola'),
			'SHARE' => esc_html__('Share', 'apola'),
			'ZOOM' => esc_html__('Zoom', 'apola')
		));

		return $this;
	}

	/**
	 * Sets a background image to the current page.
	 *
	 * @access protected
	 * @return Apola
	 */
	protected function setCurrentPageBackgroundSharp()
	{
		$background_image_isset = false;
		$background_image = $this->getThemeOption('apola-page-background-image-individual', null);
		$background_repeat = $this->getThemeOption('apola-page-background-repeat-individual', 'no-repeat');
		$background_position = $this->getThemeOption('apola-page-background-position-individual', 'center center');
		$background_size = $this->getThemeOption('apola-page-background-size-individual', 'cover');
		$background_attachment = $this->getThemeOption('apola-page-background-attachment-individual', 'fixed');

		if(is_array($background_image) && count($background_image)) {
			$background_image = array_shift($background_image);

			if(isset($background_image['full_url']) && !empty($background_image['full_url'])) {
				wp_add_inline_style('apola-style', $this->helper()->getPlainCSS('body', array(
					'background-image' => sprintf('url(%s)', $background_image['full_url']),
					'background-repeat' => $background_repeat,
					'background-position' => $background_position,
					'background-size' => $background_size,
					'background-attachment' => $background_attachment
				)));
			}
		}

		return $this;
	}

	/**
	 * Sets a blurred background image to the current page.
	 *
	 * @access protected
	 * @return Apola
	 */
	protected function setCurrentPageBackgroundBlurred()
	{
		$background_image_isset = false;
		$background_image = $this->getThemeOption('apola-page-background-image-individual', null);
		$background_repeat = $this->getThemeOption('apola-page-background-repeat-individual', 'no-repeat');
		$background_position = $this->getThemeOption('apola-page-background-position-individual', 'center center');
		$background_size = $this->getThemeOption('apola-page-background-size-individual', 'cover');
		$background_attachment = $this->getThemeOption('apola-page-background-attachment-individual', 'fixed');

		if(is_array($background_image) && count($background_image)) {
			$background_image = array_shift($background_image);

			if(isset($background_image['full_url']) && !empty($background_image['full_url'])) : ?>
				<div class="apo-section-blur-bg">
					<div data-bg-img-src="<?php echo esc_url($background_image['full_url']); ?>" class="apo-section-blur-bg-element" style="<?php echo esc_attr($this->helper()->getPlainCSS('body', array(
						'background-repeat' => $background_repeat,
						'background-position' => $background_position,
						'background-size' => $background_size,
						'background-attachment' => $background_attachment
					))); ?>"></div>
				</div>
			<?php endif;
		}

		return $this;
	}

	/**
	 * Appends some content parts to the beginning of the page.
	 *
	 * @access public
	 * @return void
	 */
	public function prependToThePageContent()
	{
		$background_is_blurred = $this->getThemeOption('apola-page-background-image-is-blurred-individual', 0);

		if($background_is_blurred == 1) $this->setCurrentPageBackgroundBlurred();
	}

	/**
	 * .
	 *
	 * @access protected
	 * @return Apola
	 */
	protected function integrateTypographySettings()
	{
		global $apola_settings;

		$elements_fonts_fallback = array(
			'body' => array(
				'google' => true,
				'font-weight' => '300',
				'font-style' => 'normal',
				'font-family' => 'Poppins',
				'font-size' => '16px',
				'line-height' => '30px'
			),
			'h1' => array(
				'google' => true,
				'font-weight' => '400',
				'font-style' => 'normal',
				'font-family' => 'Abril Fatface',
				'font-size' => '60px',
				'line-height' => '60px'
			),
			'h2' => array(
				'google' => true,
				'font-weight' => '400',
				'font-style' => 'normal',
				'font-family' => 'Abril Fatface',
				'font-size' => '48px',
				'line-height' => '48px'
			),
			'h3' => array(
				'google' => true,
				'font-weight' => '400',
				'font-style' => 'normal',
				'font-family' => 'Abril Fatface',
				'font-size' => '36px',
				'line-height' => '36px'
			),
			'h4' => array(
				'google' => true,
				'font-weight' => '400',
				'font-style' => 'normal',
				'font-family' => 'Abril Fatface',
				'font-size' => '30px',
				'line-height' => '30px'
			),
			'h5' => array(
				'google' => true,
				'font-weight' => '400',
				'font-style' => 'normal',
				'font-family' => 'Abril Fatface',
				'font-size' => '24px',
				'line-height' => '24px'
			),
			'h6' => array(
				'google' => true,
				'font-weight' => '400',
				'font-style' => 'normal',
				'font-family' => 'Abril Fatface',
				'font-size' => '20px',
				'line-height' => '20px'
			),
			'first-accented' => array(
				'google' => true,
				'font-family' => 'Abril Fatface'
			),
			'second-accented' => array(
				'google' => true,
				'font-family' => 'Unna'
			)
		);

		$body_font_selectors = array('.apo-body-font', 'blockquote footer', '.apo-404-error-text', '.gallery-caption', '.apo-progress-bar-title', '.apo-team-member-name', '.apo-social-networks-title', '.apo-pricing-table-title', '.apo-portfolio-container.apo-style-2 .apo-project-title', '.apo-fh-article-title', '.apo-header-vertical .apo-header-item .apo-page-title', '.apo-page-header.apo-style-2 .apo-page-title', '.apo-shortcode-header.apo-style-2 .apo-shortcode-header-title', '.apo-testimonial footer', '.apo-testimonial .apo-testimonial-author', '.apo-portfolio-container.apo-style-1 .apo-project-title', '.apo-portfolio-container.apo-style-3 .apo-project-title', '.apo-portfolio-container.apo-style-4 .apo-project-title', '.apo-contact-section-body .apo-contact-info');

		$first_accented_font_selectors = array('.apo-first-accented-font', 'blockquote.apo-first-accented-font', '.apo-entries-container.apo-style-5 .apo-entry-title', '.apo-photo-stream .fp-section .apo-section-title');

		$second_accented_font_selectors = array('.apo-second-accented-font', '.apo-section-sub-title', 'blockquote.apo-second-accented-font', '.apo-hidden-column .apo-navigation > li > a', '.apo-page-title', '.apo-shortcode-header-title', '.apo-counter::before', '.apo-fp-slide-numbers', '.apo-timeline-item-title', '.apo-icon-box-title', '.apo-contact-info', '.apo-widget.apo-widget-comments .apo-comment-entry-title', '.apo-entry-title', '.comments-list .fn', '.apo-portfolio-container.apo-style-6 .apo-project-title', '.apo-contact-section-title', 'blockquote:not([class*="accented-font"]):not(.apo-body-font)', '.apo-widget .calendar_wrap table tbody', '.comments-list .fn', '.apo-widget.apo-widget-comments .apo-comment-entry-title');

		$full_typography_template = '
			${selector} {
				font-family: "${font-family}", "sans-serif";
				font-weight: ${font-weight};
				font-style: ${font-style};
				font-size: ${font-size};
				line-height: ${line-height};
			}
		';

		$ff_only_typography_template = '
			${selector} {
				font-family: "${font-family}", "sans-serif";
			}
		';

		$font_data_prepared = array();

		$elements = array( 'body', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'first-accented', 'second-accented');

		$inline_css_data = '';

		if(!is_array($apola_settings)) $apola_settings = array();

		foreach($elements as $element) {
			$option_name = sprintf('%s-font', $element);


			if(!isset($apola_settings[$option_name]) || !is_array($apola_settings[$option_name])) {
				if(isset($elements_fonts_fallback[$element])) {
					$apola_settings[$option_name] = $elements_fonts_fallback[$element];
				}
			}

            if ( isset($apola_settings[$option_name]['google']) && $apola_settings[$option_name]['google'] !== 'false' ) {
				$font_data = $apola_settings[$option_name];
                $font = $apola_settings[$option_name]['font-family'];

				if(!isset($this->google_fonts[$font])) {
					$this->google_fonts[$font] = array();
				}

				$font_weight = isset($font_data['font-weight']) ? $font_data['font-weight'] : '400';
				$font_style = isset($font_data['font-style']) && $font_data['font-style'] == 'italic' ? 'italic' : '';
				$font_weight_final = $font_weight . $font_style;

				if(!in_array($font_weight_final, $this->google_fonts[$font])) {
					array_push($this->google_fonts[$font], $font_weight_final);
				}

				if(in_array($element, array('first-accented', 'second-accented'))) {
					$font_data_prepared = array(
						'${selector}' => implode(',', ($element == 'first-accented' ? $first_accented_font_selectors : $second_accented_font_selectors)),
						'${font-family}' => $font
					);
					$template = $ff_only_typography_template;
				}
				else {

					$font_data_prepared = array(
						'${selector}' => $element,
						'${font-family}' => $font,
						'${font-weight}' => (isset($font_data['font-weight']) && !empty($font_data['font-weight'])) ? $font_data['font-weight'] : $elements_fonts_fallback[$element]['font-weight'],
						'${font-style}' => (isset($font_data['font-style']) && !empty($font_data['font-style'])) ? $font_data['font-style'] : $elements_fonts_fallback[$element]['font-style'],
						'${font-size}' => isset($font_data['font-size']) ? $font_data['font-size'] : $elements_fonts_fallback[$element]['font-size'],
						'${line-height}' => isset($font_data['line-height']) ? $font_data['line-height'] : $elements_fonts_fallback[$element]['line-height']
					);

					$template = $full_typography_template;

					if($element == 'body' && count($body_font_selectors)) {
						$like_body_font_data_prepared = array(
							'${selector}' => implode(',', $body_font_selectors),
							'${font-family}' => $font
						);

						$inline_css_data .= str_replace(array_keys($like_body_font_data_prepared), array_values($like_body_font_data_prepared), $ff_only_typography_template);
					}
				}

				$inline_css_data .= str_replace(array_keys($font_data_prepared), array_values($font_data_prepared), $template);
            }

		}

		if(!empty($inline_css_data)) {
			wp_add_inline_style('apola-style', $inline_css_data);
		}

		return $this;
	}

    /**
     * Registers theme fonts.
     *
     * @access protected
     * @return Apola
     */
    protected function registerFonts()
	{

		global $apola_settings;

		$fonts_charsets_state = is_array($apola_settings) && isset($apola_settings['apola-google-charsets-state']) && $apola_settings['apola-google-charsets-state'];
		$fonts_charsets = boolval($fonts_charsets_state) && isset($apola_settings['apola-google-charsets']) && !empty($apola_settings['apola-google-charsets']) ? $apola_settings['apola-google-charsets'] : $this->google_fonts_charsets;

		wp_enqueue_style('apola-google-fonts', apola_google_fonts_url($this->google_fonts, $fonts_charsets), null, null);

        return $this;
    }

	/**
     * Returns an instance of the class that implements ConfigurableInterface interface.
     *
     * @access public
     * @return ConfigurableInterface
     */
	public function admin() {
		return $this->admin;
	}

	/**
     * Returns an instance of the class that implements HelperInterface interface.
     *
     * @access public
     * @return HelperInterface
     */
	public function helper() {
		return $this->helper;
	}

	/**
    * Returns an option value.
    *
    * @param string $name - the option name
	* @param mixed $fallback - fallback value
    * @param array $data - additional data for getting the option
    * @access public
    * @return mixed
    */
    public function getThemeOption($name, $fallback = '', array $data = array())
	{
		if( !isset( $this->admin ) ) return $fallback;

		return $this->admin->getOption($name, $fallback, $data);
	}

	/**
	* Sets an option value programmatically.
	*
	* @param string $name - the option name
	* @param mixed $value - value of the option
	* @access public
	* @return void
	*/
    public function setThemeOption($name, $value)
	{
		if( !isset( $this->admin ) ) return null;

		return $this->admin->setOption($name, $value);
	}

	/**
	 * Returns array of required plugins.
	 *
	 * @access public
	 * @return array
	 */
	public function getRequiredThemePlugins()
	{
		return $this->bundled_plugins;
	}

	/**
	 * Registers required plugins.
	 *
	 * @param array $plugins
	 * @access public
	 * @return Apola
	 */
	public function addRequiredThemePlugins($plugins)
	{
		$this->bundled_plugins = array_merge($this->bundled_plugins, $plugins);

		return $this;
	}

	/**
	 * Modifies the customizer.
	 *
	 * @access public
	 */
	public function modifyCustomizer()
	{
		global $wp_customize;

		if($wp_customize && method_exists($wp_customize, 'remove_control') && method_exists($wp_customize, 'remove_section')) {
			$wp_customize->remove_control('site_icon');
			$wp_customize->remove_control('display_header_text');
			$wp_customize->remove_section('colors');
			$wp_customize->remove_section('header_image');
		}
	}
}
?>