<?php
/**
 * Data mapper. Reads WordPress-native values and returns normalized arrays
 * that templates can consume. All template access to WP core goes through
 * this class — templates should not call WP functions directly (except
 * WooCommerce ones, which live in the Product template alone).
 *
 * @package SchemaMonsterFree
 */

namespace SchemaMonsterFree;

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

/**
 * Read site and post state into template-friendly arrays.
 */
final class Mapper {

	/**
	 * Site-level identity.
	 *
	 * @return array{url:string,name:string,description:string,logo_url:string|null,language:string}
	 */
	public static function site(): array {
		$home = rtrim( (string) home_url( '/' ), '/' ) . '/';

		$logo_url = null;
		$custom_logo_id = (int) get_theme_mod( 'custom_logo' );
		if ( $custom_logo_id > 0 ) {
			$src = wp_get_attachment_image_src( $custom_logo_id, 'full' );
			if ( is_array( $src ) && ! empty( $src[0] ) ) {
				$logo_url = (string) $src[0];
			}
		}

		return array(
			'url'         => $home,
			'name'        => (string) get_bloginfo( 'name' ),
			'description' => (string) get_bloginfo( 'description' ),
			'logo_url'    => $logo_url,
			'language'    => (string) ( get_bloginfo( 'language' ) ?: 'en-US' ),
		);
	}

	/**
	 * Per-post fields templates need.
	 *
	 * @param int $post_id Post ID.
	 * @return array<string,mixed>|null Post fields or null if post missing.
	 */
	public static function post( int $post_id ): ?array {
		$post = get_post( $post_id );
		if ( ! $post ) {
			return null;
		}

		$image_url = null;
		$thumb_id = get_post_thumbnail_id( $post );
		if ( $thumb_id ) {
			$img = wp_get_attachment_image_url( $thumb_id, 'full' );
			if ( $img ) {
				$image_url = (string) $img;
			}
		}

		return array(
			'id'             => (int) $post->ID,
			'post_type'      => (string) $post->post_type,
			'url'            => (string) get_permalink( $post ),
			'title'          => (string) get_the_title( $post ),
			'excerpt'        => (string) get_the_excerpt( $post ),
			'content'        => (string) $post->post_content,
			'date_published' => (string) get_the_date( 'c', $post ),
			'date_modified'  => (string) get_the_modified_date( 'c', $post ),
			'author_name'    => (string) get_the_author_meta( 'display_name', (int) $post->post_author ),
			'image_url'      => $image_url,
		);
	}

	/**
	 * Best-effort top-level navigation for SiteNavigationElement.
	 * Returns an empty array when no menu is assigned.
	 *
	 * @return array<int,array{name:string,url:string}>
	 */
	public static function navigation_items(): array {
		$locations = (array) get_nav_menu_locations();
		if ( empty( $locations ) ) {
			return array();
		}

		$menu_id = 0;
		foreach ( $locations as $id ) {
			if ( $id ) {
				$menu_id = (int) $id;
				break;
			}
		}
		if ( 0 === $menu_id ) {
			return array();
		}

		$items = wp_get_nav_menu_items( $menu_id );
		if ( ! is_array( $items ) ) {
			return array();
		}

		$out = array();
		foreach ( $items as $item ) {
			if ( ! $item || ! isset( $item->title, $item->url ) ) {
				continue;
			}
			// Top-level only.
			if ( ! empty( $item->menu_item_parent ) ) {
				continue;
			}
			$name = trim( (string) $item->title );
			$url  = trim( (string) $item->url );
			if ( '' === $name || '' === $url ) {
				continue;
			}
			$out[] = array(
				'name' => $name,
				'url'  => esc_url_raw( $url ),
			);
		}

		// Cap at 10 to keep the node reasonable.
		return array_slice( $out, 0, 10 );
	}
}