<?php if ( ! defined( 'ABSPATH' ) ) die( 'Direct access forbidden.' );
class Theme_Includes
{
	private static $rel_path = null;
	private static $initialized = false;
	public static function init()
	{
		if (self::$initialized) {
			return;
		} else {
			self::$initialized = true;
		}
		/**
		 * Both frontend and backend
		 */
		{
			self::include_child_first('/helpers.php');
			self::include_child_first('/hooks.php');
			self::include_all_child_first('/includes');
			add_action('init', array(__CLASS__, '_action_init'));
		}
		/**
		 * Only frontend
		 */
		if (!is_admin()) {
			add_action('wp_enqueue_scripts', array(__CLASS__, '_action_enqueue_scripts'),
				20 // Include later to be able to make wp_dequeue_style|script()
			);
		}
	}
	private static function get_rel_path($append = '')
	{
		if (self::$rel_path === null) {
			self::$rel_path = '/'. basename(dirname(__FILE__));
		}
		return self::$rel_path . $append;
	}
	private static function include_all_child_first($dir_rel_path)
	{
		$paths = array();
		if (is_child_theme()) {
			$paths[] = self::get_child_path($dir_rel_path);
		}
		$paths[] = self::get_parent_path($dir_rel_path);
		foreach ($paths as $path) {
			if ($files = glob($path .'/*.php')) {
				foreach ($files as $file) {
					self::include_isolated($file);
				}
			}
		}
	}
	/**
	 * @param string $dirname 'foo-bar'
	 * @return string 'Foo_Bar'
	 */
	private static function dirname_to_classname($dirname) {
		$class_name = explode('-', $dirname);
		$class_name = array_map('ucfirst', $class_name);
		$class_name = implode('_', $class_name);
		return $class_name;
	}
	public static function get_parent_path( $rel_path ) {
		return get_template_directory() . self::get_rel_path( $rel_path );
	}
	public static function get_child_path( $rel_path ) {
		if ( ! is_child_theme() ) {
			return null;
		}
		return get_stylesheet_directory() . self::get_rel_path( $rel_path );
	}
	public static function include_isolated( $path ) {
		include $path;
	}
	public static function include_child_first($rel_path)
	{
		if (is_child_theme()) {
			$path = self::get_child_path($rel_path);
			if (file_exists($path)) {
				self::include_isolated($path);
			}
		}
		{
			$path = self::get_parent_path($rel_path);
			if (file_exists($path)) {
				self::include_isolated($path);
			}
		}
	}
	/**
	 * @internal
	 */
	public static function _action_enqueue_scripts()
	{
		self::include_child_first('/static.php');
	}
	/**
	 * @internal
	 */
	public static function _action_init()
	{
		self::include_child_first('/menus.php');
		self::include_child_first('/posts.php');
	}
}
Theme_Includes::init();