<?php
/**
 * Register custom variation
 *
 * @package    BoldBlocks
 * @author     Phi Phan <mrphipv@gmail.com>
 * @copyright  Copyright (c) 2021, Phi Phan
 */

namespace BoldBlocks;

// Exit if accessed directly.
defined( 'ABSPATH' ) || exit;

if ( ! class_exists( 'Variations' ) ) :
	/**
	 * Manage custom block variations
	 */
	class Variations {
		/**
		 * A dummy constructor
		 */
		public function __construct() {}

		/**
		 * Run main hooks
		 *
		 * @return void
		 */
		public function run() {
			// Register custom post type.
			add_action( 'init', [ $this, 'register_custom_post_type' ], 5 );

			// Custom variation columns.
			add_filter( 'manage_edit-boldblocks_variation_columns', [ $this, 'add_variation_custom_columns' ] );
			add_action( 'manage_boldblocks_variation_posts_custom_column', [ $this, 'manage_variation_columns' ], 10, 2 );
			add_filter( 'manage_edit-boldblocks_variation_sortable_columns', [ $this, 'variation_sortable_columns' ] );
			add_action( 'pre_get_posts', [ $this, 'pre_get_posts_order_variation_custom_columns' ], 1 );

			// Only do customization on 'edit.php' page for variation.
			add_action( 'load-edit.php', [ $this, 'admin_listing_variation_page' ] );

			// Load data for js.
			add_action( 'enqueue_block_editor_assets', [ $this, 'enqueue_block_editor_assets' ] );

			// Update template on the fly for variation post type.
			add_action( 'admin_init', [ $this, 'update_template_for_variation' ] );

			// Add rest api endpoint to create variations.
			add_action( 'rest_api_init', [ $this, 'build_create_variation_endpoint' ] );
		}

		/**
		 * Register custom post type
		 *
		 * @return void
		 */
		public function register_custom_post_type() {
			// Block variations.
			$variation_labels = array(
				'name'               => _x( 'Block Variations', 'post type general name', 'boldblocks' ),
				'singular_name'      => _x( 'Block Variation', 'post type singular name', 'boldblocks' ),
				'menu_name'          => _x( 'Block Variations', 'admin menu', 'boldblocks' ),
				'name_admin_bar'     => _x( 'Block Variations', 'add new on admin bar', 'boldblocks' ),
				'add_new'            => _x( 'Add New', 'item', 'boldblocks' ),
				'add_new_item'       => __( 'Add New Block Variation', 'boldblocks' ),
				'new_item'           => __( 'New Block Variation', 'boldblocks' ),
				'edit_item'          => __( 'Edit Block Variation', 'boldblocks' ),
				'view_item'          => __( 'View Block Variation', 'boldblocks' ),
				'all_items'          => __( 'All Block Variations', 'boldblocks' ),
				'search_items'       => __( 'Search Block Variations', 'boldblocks' ),
				'parent_item_colon'  => __( 'Parent Block Variation:', 'boldblocks' ),
				'not_found'          => __( 'No items found.', 'boldblocks' ),
				'not_found_in_trash' => __( 'No items found in trash.', 'boldblocks' ),
			);

			$variation_args = array(
				'labels'              => $variation_labels,
				'description'         => __( 'All custom block variations', 'boldblocks' ),
				'public'              => true,
				'publicly_queryable'  => false,
				'exclude_from_search' => true,
				'show_ui'             => true,
				'show_in_menu'        => true,
				'show_in_nav_menus'   => false,
				'show_in_admin_bar'   => false,
				'rewrite'             => array( 'slug' => 'variation' ),
				'capability_type'     => 'post',
				'capabilities'        => array(
					'create_posts' => 'do_not_allow',
				),
				'map_meta_cap'        => true,
				'has_archive'         => false,
				'hierarchical'        => false,
				'menu_position'       => 5,
				'supports'            => array( 'title', 'editor', 'excerpt', 'author', 'custom-fields', 'revisions' ),
				'show_in_rest'        => true,
				'template_lock'       => 'insert',
			);

			register_post_type( 'boldblocks_variation', $variation_args );

			// Meta fields.
			register_meta(
				'post',
				'boldblocks_variation_block_name',
				array(
					'object_subtype' => 'boldblocks_variation',
					'show_in_rest'   => true,
					'type'           => 'string',
					'default'        => '',
					'single'         => true,
				)
			);

			register_meta(
				'post',
				'boldblocks_variation_name',
				array(
					'object_subtype' => 'boldblocks_variation',
					'show_in_rest'   => true,
					'type'           => 'string',
					'default'        => '',
					'single'         => true,
				)
			);

			register_meta(
				'post',
				'boldblocks_variation_data',
				array(
					'object_subtype' => 'boldblocks_variation',
					'show_in_rest'   => true,
					'type'           => 'string',
					'default'        => '{}',
					'single'         => true,
				)
			);
		}

		/**
		 * Enqueue editor assets
		 *
		 * @return void
		 */
		public function enqueue_block_editor_assets() {
			global $boldblocks_cbb;

			// Custom blocks access file.
			$variations_asset = $boldblocks_cbb->include_file( 'build/variations.asset.php' );

			// Scripts.
			wp_enqueue_script(
				'boldblocks-variations',
				BOLDBLOCKS_CBB_URL . '/build/variations.js',
				$variations_asset['dependencies'],
				$variations_asset['version'],
				true
			);

			// Load all variations for registration.
			wp_localize_script(
				'boldblocks-variations',
				'BoldblocksVariations',
				$this->get_all_variations()
			);
		}

		/**
		 * Update template for variation
		 *
		 * @return void
		 */
		public function update_template_for_variation() {
			// phpcs:ignore WordPress.Security.NonceVerification.Recommended
			if ( isset( $_GET['post'] ) ) {
				// phpcs:ignore WordPress.Security.NonceVerification.Recommended
				$post_id      = absint( $_GET['post'] );
				$current_post = get_post( $post_id );

				if ( 'boldblocks_variation' !== $current_post->post_type ) {
					return;
				}

				$block_name = get_post_meta( $post_id, 'boldblocks_variation_block_name', true );
				if ( $block_name ) {
					$post_type_object           = get_post_type_object( 'boldblocks_variation' );
					$post_type_object->template = array(
						array( $block_name ),
					);
				}
			}
		}

		/**
		 * Get all variations
		 *
		 * @return array
		 */
		public function get_all_variations() {
			$variation_posts = get_posts(
				[
					'post_type'      => 'boldblocks_variation',
					'posts_per_page' => -1,
					'post_status'    => 'publish',
				]
			);

			return array_map(
				function( $item ) {
					return [
						'blockName'     => get_post_meta( $item->ID, 'boldblocks_variation_block_name', true ),
						'variationName' => get_post_meta( $item->ID, 'boldblocks_variation_name', true ),
						'title'         => $item->post_title,
						'postContent'   => $item->post_content,
						'description'   => $item->post_excerpt,
						'variationData' => get_post_meta( $item->ID, 'boldblocks_variation_data', true ),
					];
				},
				$variation_posts
			);
		}


		/**
		 * Build a custom endpoint to create variation
		 *
		 * @return void
		 */
		public function build_create_variation_endpoint() {
			register_rest_route(
				'boldblocks/v1',
				'/createVariation/',
				array(
					'methods'             => 'POST',
					'callback'            => [ $this, 'create_variation' ],
					'permission_callback' => function () {
						return current_user_can( 'publish_posts' );
					},
				)
			);
		}

		/**
		 * Create variation
		 *
		 * @param WP_REST_Request $request The request object.
		 * @return void
		 */
		public function create_variation( $request ) {
			$args = $request->get_params();

			if ( empty( $args['blockName'] ) || empty( $args['variationName'] ) || empty( $args['content'] ) || empty( $args['data'] ) ) {
				wp_send_json_error( __( 'Invalid request!', 'boldblocks' ), 400 );
			}

			// Build post array.
			$post_array = [
				'post_type'    => 'boldblocks_variation',
				'post_title'   => $args['title'] ?? __( 'No Title', 'boldblocks' ),
				'post_content' => $args['content'] ?? '',
				'post_status'  => 'publish',
				'meta_input'   => [
					'boldblocks_variation_block_name' => $args['blockName'] ?? '',
					'boldblocks_variation_name'       => $args['variationName'] ?? '',
					'boldblocks_variation_data'       => $args['data'],
				],
			];

			// Parse JSON object from JSON.stringify.
			// $data = json_decode(html_entity_decode( stripslashes ($args['data'] ) ), 1);.

			// Insert new boldblocks_block post item.
			$post_id = wp_insert_post( $post_array );

			// Send the error if any.
			if ( is_wp_error( $post_id ) ) {
				wp_send_json_error( $post_id, 500 );
			}

			wp_send_json(
				[
					'data'    => __( 'The new variation has been created!', 'boldblocks' ),
					'success' => true,
					'post'    => [ 'id' => $post_id ],
				]
			);
		}

		/**
		 * Add custom columns to custom post type
		 *
		 * @param  array $columns The array of columns.
		 * @return array
		 */
		public function add_variation_custom_columns( $columns ) {
			$custom_columns = array(
				'block_name'     => esc_html__( 'Block name', 'boldblocks' ),
				'variation_name' => esc_html__( 'Variation name', 'boldblocks' ),
			);

			// Add after title column.
			$return = array_slice( $columns, 0, 2, true ) + $custom_columns + array_slice( $columns, 2, count( $columns ) - 2, true );

			return $return;
		}

		/**
		 * Manage custom columns.
		 *
		 * @param string $column  the column name.
		 * @param int    $post_id the post id.
		 */
		public function manage_variation_columns( $column, $post_id ) {
			switch ( $column ) {
				case 'block_name':
					echo esc_html( get_post_meta( $post_id, 'boldblocks_variation_block_name', true ) );
					break;

				case 'variation_name':
					echo esc_html( get_post_meta( $post_id, 'boldblocks_variation_name', true ) );
					break;

				// Just break out of the switch statement for everything else.
				default:
					break;
			}
		}

		/**
		 * Make custom columns sortable.
		 *
		 * @param  array $columns The array of columns.
		 * @return array
		 */
		public function variation_sortable_columns( $columns ) {
			$columns['block_name']     = 'block_name';
			$columns['variation_name'] = 'variation_name';

			return $columns;
		}

		/**
		 * Alter the main query for sorting.
		 *
		 * @param  WP_Query $query The main query.
		 * @return void
		 */
		public function pre_get_posts_order_variation_custom_columns( $query ) {
			// Do nothing on front end side.
			if ( ! is_admin() ) {
				return;
			}

			// Only for main query with orderby parameter.
			if ( $query->is_main_query() && 'boldblocks_variation' === $query->post_type && $query->get( 'orderby' ) ) {
				$orderby = $query->get( 'orderby' );

				switch ( $orderby ) {
					case 'block_name':
						// set our query's meta_key, which is used for custom fields.
						$query->set( 'meta_key', 'boldblocks_variation_block_name' );
						break;

					case 'variation_name':
						// set our query's meta_key, which is used for custom fields.
						$query->set( 'meta_key', 'boldblocks_variation_name' );
						break;

					default:
						break;
				}
			}

		}

		/**
		 * Add filters for custom variation columns
		 *
		 * @return void
		 */
		public function admin_listing_variation_page() {
			// phpcs:ignore WordPress.Security.NonceVerification.Recommended
			if ( isset( $_GET['post_type'] ) && 'boldblocks_variation' === $_GET['post_type'] ) {
				add_filter( 'request', [ $this, 'add_custom_columns_to_query_vars' ] );
				add_filter( 'restrict_manage_posts', [ $this, 'add_filter_select_control' ] );
			}
		}

		/**
		 * Add custom vars to query vars
		 *
		 * @param array $query_vars The array of query vars.
		 * @return array
		 */
		public function add_custom_columns_to_query_vars( $query_vars ) {
			// phpcs:ignore WordPress.Security.NonceVerification.Recommended
			if ( isset( $_GET['boldblocks_variation_filter_block'] ) ) {
				// phpcs:ignore WordPress.DB.SlowDBQuery.slow_db_query_meta_key
				$query_vars['meta_key'] = 'boldblocks_variation_block_name';
				// phpcs:ignore WordPress.DB.SlowDBQuery.slow_db_query_meta_value, WordPress.Security.NonceVerification.Recommended
				$query_vars['meta_value'] = sanitize_text_field( wp_unslash( $_GET['boldblocks_variation_filter_block'] ) );
			}

			return $query_vars;
		}

		/**
		 * Add a filter select control to filter variation by block name
		 *
		 * @return void
		 */
		public function add_filter_select_control() {
			global $wpdb;
			// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching
			$block_names = $wpdb->get_col( 'SELECT DISTINCT meta_value FROM ' . $wpdb->postmeta . ' WHERE meta_key = "boldblocks_variation_block_name" ORDER BY meta_value' );

			$boldblocks_variation_filter_block = false;
			// phpcs:ignore WordPress.Security.NonceVerification.Recommended
			if ( isset( $_GET['boldblocks_variation_filter_block'] ) ) {
				// phpcs:ignore WordPress.Security.NonceVerification.Recommended
				$boldblocks_variation_filter_block = sanitize_text_field( wp_unslash( $_GET['boldblocks_variation_filter_block'] ) );
			}
			?>
			<select name="boldblocks_variation_filter_block" id="boldblocks_variation_filter_block">
				<option value=""><?php esc_html_e( 'All Blocks', 'boldblocks' ); ?></option>
				<?php foreach ( $block_names as $block_name ) { ?>
					<option value="<?php echo esc_attr( $block_name ); ?>"<?php selected( $boldblocks_variation_filter_block, $block_name ); ?>><?php echo esc_attr( $block_name ); ?></option>
				<?php } ?>
			</select>
			<?php
		}
	}
endif;