<?php
namespace TotalTheme\Integration;

defined( 'ABSPATH' ) || exit;

/**
 * Learn Dash Integration.
 */
final class Learn_Dash {

	/**
	 * Instance.
	 */
	private static $instance = null;

	/**
	 * Create or retrieve the instance of Learn_Dash.
	 */
	public static function instance() {
		if ( null === static::$instance ) {
			static::$instance = new self();
		}
		return static::$instance;
	}

	/**
	 * Private constructor.
	 */
	private function __construct() {
		if ( is_customize_preview() ) {
			add_filter( 'wpex_customizer_panels', [ $this, 'customizer_settings' ] );
		}
		add_filter( 'wpex_post_layout_class', [ $this, 'layouts' ] );
		add_filter( 'wpex_main_metaboxes_post_types', [ $this, 'page_settings_meta' ] );
		add_filter( 'wpex_has_breadcrumbs', [ $this, 'wpex_has_breadcrumbs' ] );
	}

	/**
	 * Adds Customizer settings.
	 */
	public function customizer_settings( $panels ) {
		$branding = ( $branding = totaltheme_get_branding_label() ) ? " ({$branding})" : '';
		$panels['learndash'] = [
			'title'    => "Learn Dash{$branding}",
			'settings' => WPEX_INC_DIR . 'integration/learn-dash/customizer-settings.php',
			'icon'     => '\f118',
		];
		return $panels;
	}

	/**
	 * Alter default layout.
	 */
	public function layouts( $layout ) {
		$types = $this->get_learndash_types();
		foreach ( $types as $type ) {
			if ( is_post_type_archive( $type ) ) {
				return get_theme_mod( "{$type}_archives_layout", get_theme_mod( 'learndash_layout' ) );
			}
			if ( is_singular( $type ) ) {
				return get_theme_mod( "{$type}_single_layout", get_theme_mod( 'learndash_layout' ) );
			}
		}
		return $layout;
	}

	/**
	 * Add post types to array of post types to use with Total page settings metabox.
	 */
	public function page_settings_meta( $types ) {
		if ( get_theme_mod( 'learndash_wpex_metabox', true ) ) {
			$types = array_merge( $types, $this->get_learndash_types() );
		}
		return $types;
	}

	/**
	 * Disable breadcrumbs.
	 */
	public function wpex_has_breadcrumbs( $bool ) {
		$types = $this->get_learndash_types();
		foreach ( $types as $type ) {
			if ( is_post_type_archive( $type ) || is_singular( $type ) ) {
				$bool = get_theme_mod( 'learndash_breadcrumbs', true );
			}
		}
		return $bool;
	}

	/**
	 * Return array of learndash post types.
	 */
	public function get_learndash_types() {
		if ( function_exists( 'learndash_get_post_types' ) ) {
			return learndash_get_post_types();
		}

		return [
			'sfwd-courses',
			'sfwd-lessons',
			'sfwd-topic',
			'sfwd-quiz',
			'sfwd-question',
			'sfwd-certificates',
			'sfwd-assignment',
			'sfwd-groups',
		];
	}

	/**
	 * Prevent cloning.
	 */
	private function __clone() {}

	/**
	 * Prevent unserializing.
	 */
	public function __wakeup() {
		trigger_error( 'Cannot unserialize a Singleton.', E_USER_WARNING);
	}

}