<?php

declare( strict_types=1 );

namespace AcezSeo\Location;

use AcezSeo\Location\Rules\ConditionalTagRule;
use AcezSeo\Location\Rules\PageTemplateRule;

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

/**
 * Builds a RuleSet from the raw array stored by LocationRulesRepository.
 * New rule types can be added via the `acez_seo_location_rule` filter
 * without modifying this class.
 */
final class RuleFactory
{
	/**
	 * @param array<int, array<int, array<string, string>>> $groups_data
	 */
	public static function from_array( array $groups_data ): RuleSet
	{
		$groups = array();

		foreach ( $groups_data as $group_data )
		{
			$rules = array();

			foreach ( (array) $group_data as $rule_data )
			{
				$rule = self::build_rule( (array) $rule_data );

				if ( null !== $rule )
				{
					$rules[] = $rule;
				}
			}

			$groups[] = new RuleGroup( $rules );
		}

		return new RuleSet( $groups );
	}

	/**
	 * @param array<string, string> $rule_data
	 */
	private static function build_rule( array $rule_data ): ?RuleInterface
	{
		$type  = isset( $rule_data['type'] ) ? (string) $rule_data['type'] : '';
		$value = isset( $rule_data['value'] ) ? (string) $rule_data['value'] : '';

		if ( 'page_template' === $type && '' !== $value )
		{
			return new PageTemplateRule( $value );
		}

		if ( 'conditional_tag' === $type && '' !== $value && in_array( $value, wp_list_pluck( ConditionalTags::all(), 'tag' ), true ) )
		{
			return new ConditionalTagRule( $value );
		}

		/**
		 * Filters/extends rule-type resolution for custom location rules
		 * (e.g. archive, taxonomy, or PHP-condition rules).
		 *
		 * @param RuleInterface|null $rule
		 * @param string             $type
		 * @param string             $value
		 */
		$rule = apply_filters( 'acez_seo_location_rule', null, $type, $value );

		return $rule instanceof RuleInterface ? $rule : null;
	}
}