<?php

/* ============================================================================
 * Copyright 2020 Zindex Software
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * ============================================================================ */
namespace Matomo\Dependencies\McpServer\Opis\JsonSchema\Filters;

use Matomo\Dependencies\McpServer\Opis\Uri\UriTemplate;
use Matomo\Dependencies\McpServer\Opis\JsonSchema\ValidationContext;
use Matomo\Dependencies\McpServer\Opis\JsonSchema\Filter;
use Matomo\Dependencies\McpServer\Opis\JsonSchema\Schema;
use Matomo\Dependencies\McpServer\Opis\JsonSchema\Uri;
use Matomo\Dependencies\McpServer\Opis\JsonSchema\Variables\VariablesContainer;
class SchemaExistsFilter implements Filter
{
    /**
     * @inheritDoc
     */
    public function validate(ValidationContext $context, Schema $schema, array $args = []) : bool
    {
        $ref = $args['ref'] ?? $context->currentData();
        if (!is_string($ref)) {
            return \false;
        }
        if (UriTemplate::isTemplate($ref)) {
            if (isset($args['vars']) && is_object($args['vars'])) {
                $vars = new VariablesContainer($args['vars'], \false);
                $vars = $vars->resolve($context->rootData(), $context->currentDataPath());
                if (!is_array($vars)) {
                    $vars = (array) $vars;
                }
                $vars += $context->globals();
            } else {
                $vars = $context->globals();
            }
            $ref = (new UriTemplate($ref))->resolve($vars);
            unset($vars);
        }
        unset($args);
        return $this->refExists($ref, $context, $schema);
    }
    /**
     * @param string $ref
     * @param ValidationContext $context
     * @param Schema $schema
     * @return bool
     */
    protected function refExists(string $ref, ValidationContext $context, Schema $schema) : bool
    {
        if ($ref === '') {
            return \false;
        }
        if ($ref === '#') {
            return \true;
        }
        $info = $schema->info();
        $id = Uri::merge($ref, $info->idBaseRoot(), \true);
        if ($id === null) {
            return \false;
        }
        return $context->loader()->loadSchemaById($id) !== null;
    }
}
