<?php
namespace Elementor;

use Elementor\Includes\Elements\Container;

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

/**
 * Elementor elements manager.
 *
 * Elementor elements manager handler class is responsible for registering and
 * initializing all the supported elements.
 *
 * @since 1.0.0
 */
class Elements_Manager {

	const CATEGORY_ATOMIC_ELEMENTS = 'v4-elements';
	const CATEGORY_ATOMIC_FORM = 'atomic-form';
	const CATEGORY_FAVORITES = 'favorites';
	const CATEGORY_ANGIE_WIDGETS = 'angie-widgets';

	/**
	 * Element types.
	 *
	 * Holds the list of all the element types.
	 *
	 * @access private
	 *
	 * @var Element_Base[]
	 */
	private $_element_types;

	/**
	 * Element categories.
	 *
	 * Holds the list of all the element categories.
	 *
	 * @access private
	 *
	 * @var $categories
	 */
	private $categories;

	/**
	 * Elements constructor.
	 *
	 * Initializing Elementor elements manager.
	 *
	 * @since 1.0.0
	 * @access public
	 */
	public function __construct() {
		$this->require_files();
	}

	/**
	 * Create element instance.
	 *
	 * This method creates a new element instance for any given element.
	 *
	 * @since 1.0.0
	 * @access public
	 *
	 * @param array        $element_data Element data.
	 * @param array        $element_args Optional. Element arguments. Default is
	 *                                   an empty array.
	 * @param Element_Base $element_type Optional. Element type. Default is null.
	 *
	 * @return Element_Base|null Element instance if element created, or null
	 *                           otherwise.
	 */
	public function create_element_instance( array $element_data, array $element_args = [], ?Element_Base $element_type = null ) {
		if ( null === $element_type ) {
			$element_type = $this->get_element( $element_data['elType'], isset( $element_data['widgetType'] ) ? $element_data['widgetType'] : null );
		}

		if ( ! $element_type ) {
			return null;
		}

		$args = array_merge( $element_type->get_default_args(), $element_args );

		$element_class = $element_type->get_class_name();

		try {
			$element = new $element_class( $element_data, $args );
		} catch ( \Exception $e ) {
			return null;
		}

		return $element;
	}

	public function get_element( string $el_type, ?string $widget_type = null ) {
		$element = null;

		if ( 'widget' === $el_type ) {
			$element = Plugin::$instance->widgets_manager->get_widget_types( $widget_type );
		} else {
			$element = $this->get_element_types( $el_type );
		}

		return $element;
	}

	/**
	 * Get element categories.
	 *
	 * Retrieve the list of categories the element belongs to.
	 *
	 * @since 1.0.0
	 * @access public
	 *
	 * @return array Element categories.
	 */
	public function get_categories() {
		if ( null === $this->categories ) {
			$this->init_categories();
		}

		return $this->categories;
	}

	/**
	 * Add element category.
	 *
	 * Register new category for the element.
	 *
	 * @since 1.7.12
	 * @access public
	 *
	 * @param string $category_name       Category name.
	 * @param array  $category_properties Category properties.
	 */
	public function add_category( $category_name, $category_properties ) {
		if ( null === $this->categories ) {
			$this->get_categories();
		}

		if ( ! isset( $this->categories[ $category_name ] ) ) {
			$this->categories[ $category_name ] = $category_properties;
		}
	}

	/**
	 * Register element type.
	 *
	 * Add new type to the list of registered types.
	 *
	 * @since 1.0.0
	 * @access public
	 *
	 * @param Element_Base $element Element instance.
	 *
	 * @return bool Whether the element type was registered.
	 */
	public function register_element_type( Element_Base $element ) {
		$this->_element_types[ $element->get_name() ] = $element;

		return true;
	}

	/**
	 * Unregister element type.
	 *
	 * Remove element type from the list of registered types.
	 *
	 * @since 1.0.0
	 * @access public
	 *
	 * @param string $name Element name.
	 *
	 * @return bool Whether the element type was unregister, or not.
	 */
	public function unregister_element_type( $name ) {
		if ( ! isset( $this->_element_types[ $name ] ) ) {
			return false;
		}

		unset( $this->_element_types[ $name ] );

		return true;
	}

	/**
	 * Get element types.
	 *
	 * Retrieve the list of all the element types, or if a specific element name
	 * was provided retrieve his element types.
	 *
	 * @since 1.0.0
	 * @access public
	 *
	 * @param string $element_name Optional. Element name. Default is null.
	 *
	 * @return null|Element_Base|Element_Base[] Element types, or a list of all the element
	 *                             types, or null if element does not exist.
	 */
	public function get_element_types( $element_name = null ) {
		if ( is_null( $this->_element_types ) ) {
			$this->init_elements();
		}

		if ( null !== $element_name ) {
			return isset( $this->_element_types[ $element_name ] ) ? $this->_element_types[ $element_name ] : null;
		}

		return $this->_element_types;
	}

	/**
	 * Get element types config.
	 *
	 * Retrieve the config of all the element types.
	 *
	 * @since 1.0.0
	 * @access public
	 *
	 * @return array Element types config.
	 */
	public function get_element_types_config() {
		$config = [];

		foreach ( $this->get_element_types() as $element ) {
			$config[ $element->get_name() ] = $element->get_config();
		}

		return $config;
	}

	/**
	 * Render elements content.
	 *
	 * Used to generate the elements templates on the editor.
	 *
	 * @since 1.0.0
	 * @access public
	 */
	public function render_elements_content() {
		foreach ( $this->get_element_types() as $element_type ) {
			$element_type->print_template();
		}
	}

	/**
	 * Init elements.
	 *
	 * Initialize Elementor elements by registering the supported elements.
	 * Elementor supports by default `section` element and `column` element.
	 *
	 * @since 2.0.0
	 * @access private
	 */
	private function init_elements() {
		$this->_element_types = [];

		foreach ( [ 'section', 'column' ] as $element_name ) {
			$class_name = __NAMESPACE__ . '\Element_' . $element_name;

			$this->register_element_type( new $class_name() );
		}

		$experiments_manager = Plugin::$instance->experiments;

		if ( $experiments_manager->is_feature_active( 'container' ) ) {
			$this->register_element_type( new Container() );
		}

		/**
		 * After elements registered.
		 *
		 * Fires after Elementor elements are registered.
		 *
		 * @since 1.0.0
		 */
		do_action( 'elementor/elements/elements_registered', $this );
	}

	/**
	 * Init categories.
	 *
	 * Initialize the element categories.
	 *
	 * @since 1.7.12
	 * @access private
	 */
	private function init_categories() {
		$this->categories = [
			self::CATEGORY_ATOMIC_ELEMENTS => [
				'title' => esc_html__( 'Atomic Elements', 'elementor' ),
				'hideIfEmpty' => true,
			],
			'layout' => [
				'title' => esc_html__( 'Layout', 'elementor' ),
				'hideIfEmpty' => true,
			],
			'basic' => [
				'title' => esc_html__( 'Basic', 'elementor' ),
				'icon' => 'eicon-font',
			],
			'pro-elements' => [
				'title' => esc_html__( 'Pro', 'elementor' ),
				'promotion' => [
					'url' => esc_url( 'https://go.elementor.com/go-pro-section-pro-widget-panel/' ),
				],
			],
			'helloplus' => [
				'title' => esc_html__( 'Hello+', 'elementor' ),
				'hideIfEmpty' => true,
			],
			'general' => [
				'title' => esc_html__( 'General', 'elementor' ),
				'icon' => 'eicon-font',
			],
			'link-in-bio' => [
				'title' => esc_html__( 'Link In Bio', 'elementor' ),
				'hideIfEmpty' => true,
			],
			'theme-elements' => [
				'title' => esc_html__( 'Site', 'elementor' ),
				'active' => false,
				'promotion' => [
					'url' => esc_url( 'https://go.elementor.com/go-pro-section-site-widget-panel/' ),
				],
			],
			'woocommerce-elements' => [
				'title' => esc_html__( 'WooCommerce', 'elementor' ),
				'active' => false,
				'promotion' => [
					'url' => esc_url( 'https://go.elementor.com/go-pro-section-woocommerce-widget-panel/' ),
				],
			],
		];

		if ( Utils::has_pro() && Plugin::$instance->experiments->is_feature_active( 'e_pro_atomic_form' ) ) {
			$atomic_form_category = [
				'title' => esc_html__( 'Atomic Form', 'elementor' ),
				'hideIfEmpty' => true,
			];

			$this->categories = array_merge(
				[ self::CATEGORY_ATOMIC_ELEMENTS => $this->categories[ self::CATEGORY_ATOMIC_ELEMENTS ] ],
				[ self::CATEGORY_ATOMIC_FORM => $atomic_form_category ],
				array_diff_key( $this->categories, [ self::CATEGORY_ATOMIC_ELEMENTS => true ] )
			);
		}

		// Not using the `add_category` because it doesn't allow 3rd party to inject a category on top the others.
		$this->categories = array_merge_recursive( [
			self::CATEGORY_FAVORITES => [
				'title' => esc_html__( 'Favorites', 'elementor' ),
				'icon' => 'eicon-heart',
				'sort' => 'a-z',
				'hideIfEmpty' => false,
			],
		], $this->categories );

		/**
		 * When categories are registered.
		 *
		 * Fires after basic categories are registered, before WordPress
		 * category have been registered.
		 *
		 * This is where categories registered by external developers are
		 * added.
		 *
		 * @since 2.0.0
		 *
		 * @param Elements_Manager $this Elements manager instance.
		 */
		do_action( 'elementor/elements/categories_registered', $this );

		$this->promote_category_after( self::CATEGORY_ANGIE_WIDGETS, [ self::CATEGORY_ATOMIC_FORM, self::CATEGORY_ATOMIC_ELEMENTS ] );

		$this->categories['wordpress'] = [
			'title' => esc_html__( 'WordPress', 'elementor' ),
			'icon' => 'eicon-wordpress',
			'active' => false,
		];
	}

	public function enqueue_elements_styles() {
		foreach ( $this->get_element_types() as $element ) {
			$element->enqueue_styles();
		}
	}

	public function enqueue_elements_scripts() {
		foreach ( $this->get_element_types() as $element ) {
			$element->enqueue_scripts();
		}
	}

	public function register_frontend_handlers() {
		foreach ( $this->get_element_types() as $element ) {
			$element->register_frontend_handlers();
		}
	}

	private function promote_category_after( string $category_name, array $after_candidates ): void {
		if ( ! isset( $this->categories[ $category_name ] ) ) {
			return;
		}

		$after = null;

		foreach ( $after_candidates as $candidate ) {
			if ( isset( $this->categories[ $candidate ] ) ) {
				$after = $candidate;
				break;
			}
		}

		if ( ! $after ) {
			return;
		}

		$category = $this->categories[ $category_name ];
		unset( $this->categories[ $category_name ] );

		$position = array_search( $after, array_keys( $this->categories ), true ) + 1;
		$this->categories = array_merge(
			array_slice( $this->categories, 0, $position, true ),
			[ $category_name => $category ],
			array_slice( $this->categories, $position, null, true )
		);
	}

	/**
	 * Require files.
	 *
	 * Require Elementor element base class and column, section and repeater
	 * elements.
	 *
	 * @since 1.0.0
	 * @access private
	 */
	private function require_files() {
		require_once ELEMENTOR_PATH . 'includes/base/element-base.php';

		require ELEMENTOR_PATH . 'includes/elements/column.php';
		require ELEMENTOR_PATH . 'includes/elements/section.php';
		require ELEMENTOR_PATH . 'includes/elements/repeater.php';
	}
}