<?php

namespace FlexifyBlocks\DynamicContent;

use WP_Post;

/**
 * Dynamic Link resolver (frontend) - Free tags only.
 *
 * PHP twin of DynamicLinkResolver.js. Same config keys, same behaviour.
 *
 * CONTRACT: resolve() returns a sanitized URL (esc_url_raw) or ''.
 * The caller still escapes it with esc_url() when printing the attribute.
 *
 * Adding a type = one entry in RESOLVERS + one `tag_*` method.
 *
 * @package flexify-blocks
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

if ( ! class_exists( __NAMESPACE__ . '\DynamicLinkResolver' ) ) :

	final class DynamicLinkResolver {

		/** type => method. Anything not listed (Pro / unknown) resolves to ''. */
		const RESOLVERS = array(
			'post_url'   => 'tag_post_url',
			'author_url' => 'tag_author_url',
		);

		/**
		 * @param array        $config `dynamicLink` block attribute.
		 * @param WP_Post|null $post   Post to read from (block context or current post).
		 * @return string Sanitized URL, or '' when there is none.
		 */
		public static function resolve( array $config, $post ) {
			$type = isset( $config['type'] ) && is_string( $config['type'] ) ? $config['type'] : '';

			if ( ! $post instanceof WP_Post || ! isset( self::RESOLVERS[ $type ] ) || ! self::can_read( $post ) ) {
				return '';
			}

			$method = self::RESOLVERS[ $type ];
			$url    = trim( (string) self::$method( $config, $post ) );

			return '' === $url ? '' : esc_url_raw( $url );
		}

		/** Published, or the current user may read it (previews, private posts). */
		private static function can_read( WP_Post $post ) {
			return 'publish' === $post->post_status || current_user_can( 'read_post', $post->ID );
		}

		/* ------------------------------------------------------------------ */
		/* Type resolvers: ( $config, $post ) => raw URL                      */
		/* ------------------------------------------------------------------ */

		private static function tag_post_url( array $config, WP_Post $post ) {
			return (string) get_permalink( $post );
		}

		private static function tag_author_url( array $config, WP_Post $post ) {
			$author_id = (int) $post->post_author;
			if ( ! $author_id ) {
				return '';
			}

			// Undefined -> 'author_archive', same default as the editor.
			$type = isset( $config['authorUrlType'] ) ? $config['authorUrlType'] : 'author_archive';

			return 'author_website' === $type
				? (string) get_the_author_meta( 'url', $author_id )
				: (string) get_author_posts_url( $author_id );
		}
	}

endif;