<?php
/**
 * Generates the styles for the frontend.
 * Handles the 'output' argument of fields.
 * Usage instructions on https://github.com/aristath/kirki/wiki/output
 *
 * @package     Kirki
 * @category    Core
 * @author      Aristeides Stathopoulos
 * @copyright   Copyright (c) 2016, Aristeides Stathopoulos
 * @license     http://opensource.org/licenses/gpl-2.0.php GNU Public License
 * @since       1.0
 */

// Exit if accessed directly
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

if ( ! class_exists( 'Kirki_Styles_Frontend' ) ) {
	class Kirki_Styles_Frontend {

		public $processed = false;

		public function __construct() {

			global $wp_customize;

			$config   = apply_filters( 'kirki/config', array() );
			$priority = ( isset( $config['styles_priority'] ) ) ? intval( $config['styles_priority'] ) : 999;

			if ( ( defined( 'KIRKI_NO_OUTPUT' ) && KIRKI_NO_OUTPUT ) || ( isset( $config['disable_output'] ) && true !== $config['disable_output'] ) ) {
				return;
			}

			// /**
			//  * If we are in the customizer, load CSS using inline-styles.
			//  * If we are in the frontend AND $config['inline_css'] == false
			//  * Then load dynamic CSS using AJAX.
			//  */
			// if ( ! $wp_customize && ( isset( $config['inline_css'] ) && false == $config['inline_css'] ) ) {
			// 	add_action( 'wp_enqueue_scripts', array( $this, 'frontend_styles' ), $priority );
			// 	add_action( 'wp_ajax_kirki_dynamic_css', array( $this, 'ajax_dynamic_css' ) );
			// 	add_action( 'wp_ajax_nopriv_kirki_dynamic_css', array( $this, 'ajax_dynamic_css' ) );
			// } else {
				add_action( 'wp_enqueue_scripts', array( $this, 'inline_dynamic_css' ), $priority );
			// }

		}

		public function inline_dynamic_css() {
			new Kirki_GoogleFonts_Loader();

			$configs = Kirki::$config;
			if ( ! $this->processed ) {
				foreach ( $configs as $config_id => $args ) {
					if ( true === $args['disable_output'] ) {
						continue;
					}
					$styles = self::loop_controls( $config_id );
					if ( ! empty( $styles ) ) {
						wp_enqueue_style( 'kirki-styles-' . $config_id, trailingslashit( Kirki::$url ) . 'assets/css/kirki-styles.css', null, null );
						wp_add_inline_style( 'kirki-styles-' . $config_id, $styles );
					}
				}
				$this->processed = true;
			}
		}

		// public function ajax_dynamic_css() {
		// 	require( Kirki::$path . DIRECTORY_SEPARATOR . 'includes' . DIRECTORY_SEPARATOR . 'dynamic-css.php' );
		// 	exit;
		// }
		//
		// public function frontend_styles() {
		// 	wp_enqueue_style( 'kirki-styles-php', admin_url( 'admin-ajax.php' ) . '?action=kirki_dynamic_css', null, null );
		// }

		/**
		 * loop through all fields and create an array of style definitions
		 */
		public static function loop_controls( $config_id ) {

			// Get an instance of the Kirki_Styles_Output_CSS class.
			// This will make sure google fonts and backup fonts are loaded.
			Kirki_Styles_Output_CSS::get_instance();

			$fields = Kirki::$fields;
			$css    = array();

			// Early exit if no fields are found.
			if ( empty( $fields ) ) {
				return;
			}

			foreach ( $fields as $field ) {

				// Only process fields that belong to $config_id
				if ( $config_id != $field['kirki_config'] ) {
					continue;
				}

				// Only continue if $field['output'] is set
				if ( isset( $field['output'] ) && ! empty( $field['output'] ) && 'background' != $field['type'] ) {

					if ( function_exists( 'array_replace_recursive' ) ) {
						$css = array_replace_recursive( $css, Kirki_Styles_Output_CSS::css( $field ) );
					} else {
						$css = Kirki_Helper::array_replace_recursive( $css, Kirki_Styles_Output_CSS::css( $field ) );
					}

				}

			}

			if ( is_array( $css ) ) {
				return Kirki_Styles_Output_CSS::styles_parse( Kirki_Styles_Output_CSS::add_prefixes( $css ) );
			}

			return;

		}

	}
}