<?php
/**
 * Adds the Webfont Loader to load fonts asynchronously.
 *
 * @package kirki-framework/module-webfonts
 * @author Themeum
 * @copyright Copyright (c) 2023, Themeum
 * @license https://opensource.org/licenses/MIT
 * @since 1.0.0
 */

namespace Kirki\Module\Webfonts;

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

use Kirki\URL;

/**3.
 * Manages the way Google Fonts are enqueued.
 */
final class Async
{

	/**
	 * Only load the webfont script if this is true.
	 *
	 * @static
	 * @access public
	 * @since 1.0.0
	 * @var bool
	 */
	public static $load = false;

	/**
	 * The config ID.
	 *
	 * @access protected
	 * @since 1.0.0
	 * @var string
	 */
	protected $config_id;

	/**
	 * The \Kirki\Module\Webfonts object.
	 *
	 * @access protected
	 * @since 1.0.0
	 * @var object
	 */
	protected $webfonts;

	/**
	 * The \Kirki\Module\Webfonts\Google object.
	 *
	 * @access protected
	 * @since 1.0.0
	 * @var object
	 */
	protected $googlefonts;

	/**
	 * Fonts to load.
	 *
	 * @access protected
	 * @since 1.0.0
	 * @var array
	 */
	protected $fonts_to_load = [];

	/**
	 * Constructor.
	 *
	 * @access public
	 * @since 1.0.0
	 * @param string $config_id   The config-ID.
	 * @param object $webfonts    The \Kirki\Module\Webfonts object.
	 * @param object $googlefonts The \Kirki\Module\Webfonts\Google object.
	 * @param array  $args        Extra args we want to pass.
	 */
	public function __construct($config_id, $webfonts, $googlefonts, $args = [])
	{
		$this->config_id = $config_id;
		$this->webfonts = $webfonts;
		$this->googlefonts = $googlefonts;

		add_action('wp_head', [$this, 'webfont_loader']);
		add_action('wp_head', [$this, 'webfont_loader_script'], 30);

		// Add these in the dashboard to support editor-styles.
		add_action('admin_enqueue_scripts', [$this, 'webfont_loader']);
		add_action('admin_enqueue_scripts', [$this, 'webfont_loader_script'], 30);

		// add_filter( 'wp_resource_hints', [ $this, 'resource_hints' ], 10, 2 );
	}

	/**
	 * Add preconnect for Google Fonts.
	 *
	 * @access public
	 * @param array  $urls           URLs to print for resource hints.
	 * @param string $relation_type  The relation type the URLs are printed.
	 * @return array $urls           URLs to print for resource hints.
	 */
	public function resource_hints($urls, $relation_type)
	{
		$fonts_to_load = $this->googlefonts->fonts;

		if (!empty($fonts_to_load) && 'preconnect' === $relation_type) {
			$urls[] = [
				'href' => 'https://fonts.gstatic.com',
				'crossorigin',
			];
		}
		return $urls;
	}

	/**
	 * Webfont Loader for Google Fonts.
	 *
	 * @access public
	 * @since 1.0.0
	 */
	public function webfont_loader()
	{
		global $wp_customize;

		// Go through our fields and populate $this->fonts.
		$this->webfonts->loop_fields($this->config_id);

		$this->googlefonts->fonts = apply_filters('kirki_enqueue_google_fonts', $this->googlefonts->fonts);

		// Goes through $this->fonts and adds or removes things as needed.
		$this->googlefonts->process_fonts();

		$subset = apply_filters('kirki_googlefonts_subset', 'cyrillic,cyrillic-ext,devanagari,greek,greek-ext,khmer,latin,latin-ext,vietnamese,hebrew,arabic,bengali,gujarati,tamil,telugu,thai');

		foreach ($this->googlefonts->fonts as $font => $weights) {
			foreach ($weights as $key => $value) {
				if ('italic' === $value) {
					$weights[$key] = '400i';
				} else {
					$weights[$key] = str_replace(['regular', 'bold', 'italic'], ['400', '', 'i'], $value);
				}
			}
			$this->fonts_to_load[] = $font . ':' . join(',', $weights) . ':' . $subset;
		}
		if (!empty($this->fonts_to_load)) {
			self::$load = true;
		}

		if (self::$load || $wp_customize || is_customize_preview()) {
			wp_enqueue_script('webfont-loader', URL::get_from_path(dirname(__DIR__) . '/assets/scripts/vendor-typekit/webfontloader.js'), [], '3.0.28', true);
		}
	}

	/**
	 * Webfont Loader script for Google Fonts.
	 *
	 * @access public
	 * @since 1.0.0
	 */
	public function webfont_loader_script()
	{
		if (!empty($this->fonts_to_load)) {
			wp_add_inline_script(
				'webfont-loader',
				'if(typeof WebFont!=="undefined"){WebFont.load({google:{families:[\'' . join('\', \'', $this->fonts_to_load) . '\']}});}',
				'after'
			);
		}
	}

	/**
	 * Set the $load property of this object.
	 *
	 * @access public
	 * @since 1.0.0
	 * @param bool $load Set to false to disable loading.
	 * @return void
	 */
	public function set_load($load)
	{
		self::$load = $load;
	}
}