<?php
/**
 * The try-on type of a WooCommerce product.
 *
 * @package Fitzaro
 */

namespace Fitzaro\Prompt;

use Fitzaro\Settings;

defined( 'ABSPATH' ) || exit;

/**
 * Reads the owner's settings (product, categories with their parents, enabled types) and the
 * category names, then lets code override the result. See TypeChoice for the order.
 */
final class TypeResolver {

	public const PRODUCT_META = '_fitzaro_type';
	public const TERM_META    = 'fitzaro_type';

	/**
	 * ProductType constant for a product, or null when try-on is not offered for it.
	 *
	 * @param int $product_id Product (the parent for variations).
	 */
	public static function for_product( int $product_id ): ?string {
		$terms      = array();
		$categories = array();

		foreach ( wc_get_product_term_ids( $product_id, 'product_cat' ) as $term_id ) {
			foreach ( array_merge( array( $term_id ), get_ancestors( $term_id, 'product_cat', 'taxonomy' ) ) as $id ) {
				$term = get_term( (int) $id, 'product_cat' );
				if ( $term instanceof \WP_Term ) {
					$terms[]      = $term->name;
					$terms[]      = $term->slug;
					$categories[] = (string) get_term_meta( $term->term_id, self::TERM_META, true );
				}
			}
		}

		$type = TypeChoice::resolve(
			(string) get_post_meta( $product_id, self::PRODUCT_META, true ),
			$categories,
			$terms,
			Settings::enabled_types()
		);

		/**
		 * Filters the try-on type of a product: 'top', 'dress', 'eyewear', or null for none.
		 * The owner's product and category settings are already applied.
		 *
		 * @since 1.0.0
		 *
		 * @param string|null $type       Type.
		 * @param int         $product_id Product ID.
		 */
		return ProductType::valid( apply_filters( 'fitzaro/product_type', $type, $product_id ) );
	}

	/**
	 * Labels of the choices offered in the product and category settings.
	 *
	 * @return array<string, string>
	 */
	public static function choices(): array {
		return array(
			''                   => __( 'Automatic', 'fitzaro' ),
			ProductType::TOP     => __( 'Top', 'fitzaro' ),
			ProductType::DRESS   => __( 'Dress', 'fitzaro' ),
			ProductType::EYEWEAR => __( 'Eyewear', 'fitzaro' ),
			TypeChoice::OFF      => __( 'Off', 'fitzaro' ),
		);
	}
}