<?php
/**
 * The class to operate post editor metabox settings
 *
 * @since 		4.7
 * @package    	Core
 * @subpackage 	Core/inc
 * @author     	LiteSpeed Technologies <info@litespeedtech.com>
 */
namespace LiteSpeed;

defined( 'WPINC' ) || exit;

class Metabox extends Root {
	const LOG_TAG = '📦';

	const POST_NONCE_ACTION = 'post_nonce_action';

	private $_postmeta_settings;

	/**
	 * Get the setting list
	 * @since 4.7
	 */
	public function __construct() {
		// Append meta box
		$this->_postmeta_settings = array(
			'litespeed_no_cache' => __( 'Disable Cache', 'litespeed-cache' ),
			'litespeed_no_image_lazy' => __( 'Disable Image Lazyload', 'litespeed-cache' ),
			'litespeed_no_vpi' => __( 'Disable VPI', 'litespeed-cache' ),
			'litespeed_vpi_list' => __( 'Viewport Images', 'litespeed-cache' ),
			'litespeed_vpi_list_mobile' => __( 'Viewport Images', 'litespeed-cache' ) . ' - ' . __( 'Mobile', 'litespeed-cache' ),
		);
	}

	/**
	 * Register post edit settings
	 * @since 4.7
	 */
	public function register_settings() {
		add_action( 'add_meta_boxes', array( $this, 'add_meta_boxes' ) );
		add_action( 'save_post', array( $this, 'save_meta_box_settings' ), 15, 2 );
		add_action( 'attachment_updated', array( $this, 'save_meta_box_settings' ), 15, 2 );
	}

	/**
	 * Regsiter meta box
	 * @since 4.7
	 */
	public function add_meta_boxes( $post_type ) {
		if ( apply_filters( 'litespeed_bypass_metabox', false, $post_type ) ) {
			return;
		}
		$post_type_obj = get_post_type_object( $post_type );
		if ( ! empty( $post_type_obj ) && ! $post_type_obj->public ) {
			self::debug('post type public=false, bypass add_meta_boxes');
			return;
		}
		add_meta_box( 'litespeed_meta_boxes', __( 'LiteSpeed Options', 'litespeed-cache' ), array( $this, 'meta_box_options' ), $post_type, 'side', 'core' );
	}

	/**
	 * Show meta box content
	 * @since 4.7
	 */
	public function meta_box_options() {
		require_once LSCWP_DIR . 'tpl/inc/metabox.php';
	}

	/**
	 * Save settings
	 * @since 4.7
	 */
	public function save_meta_box_settings( $post_id, $post ) {
		global $pagenow;

		self::debug( 'Maybe save post2 [post_id] ' . $post_id );

		if ( $pagenow != 'post.php' || ! $post || ! is_object( $post ) ) {
			return;
		}

		if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) {
			return;
		}

		if ( ! $this->cls( 'Router' )->verify_nonce( self::POST_NONCE_ACTION ) ) {
			return;
		}

		self::debug( 'Saving post [post_id] ' . $post_id );

		foreach ( $this->_postmeta_settings as $k => $v ) {
			$val = isset( $_POST[ $k ] ) ? $_POST[ $k ] : false;
			$this->save( $post_id, $k, $val );
		}
	}

	/**
	 * Load setting per post
	 * @since 4.7
	 */
	public function setting( $conf, $post_id = false ) {
		// Check if has metabox non-cacheable setting or not
		if ( ! $post_id ) {
			$home_id = get_option( 'page_for_posts' );
			if ( is_singular() ) {
				$post_id = get_the_ID();
			} elseif ( $home_id > 0 && is_home() ) {
				$post_id = $home_id;
			}
		}

		if ( $post_id && $val = get_post_meta( $post_id, $conf, true ) ) {
			return $val;
		}

		return null;
	}

	/**
	 * Save a metabox value
	 * @since 4.7
	 */
	public function save( $post_id, $name, $val, $is_append = false ) {
		if( strpos( $name, 'litespeed_vpi_list' ) !== false ) {
			$val = Utility::sanitize_lines( $val, 'basename,drop_webp' );
		}

		// Load existing data if has set
		if ( $is_append ) {
			$existing_data = $this->setting( $name, $post_id );
			if ( $existing_data ) {
				$existing_data = Utility::sanitize_lines( $existing_data, 'basename' );
				$val = array_unique( array_merge( $val, $existing_data ) );
			}
		}

		if ( $val ) {
			update_post_meta( $post_id, $name, $val );
		}
		else {
			delete_post_meta( $post_id, $name );
		}
	}

	/**
	 * Load exclude images per post
	 * @since 4.7
	 */
	public function lazy_img_excludes( $list ) {
		$is_mobile = $this->_separate_mobile();
		$excludes = $this->setting( $is_mobile ? 'litespeed_vpi_list_mobile' : 'litespeed_vpi_list' );
		if ( $excludes !== null ) {
			$excludes = Utility::sanitize_lines( $excludes, 'basename' );
			if ( $excludes ) {
				// Check if contains `data:` (invalid result, need to clear existing result) or not
				if ( Utility::str_hit_array( 'data:', $excludes ) ) {
					$this->cls( 'VPI' )->add_to_queue();
				}
				else {
					return array_merge( $list, $excludes );
				}
			}

			return $list;
		}

		$this->cls( 'VPI' )->add_to_queue();

		return $list;
	}
}
