<?php
/**
 * Copyright 2016 Google Inc. All Rights Reserved.
 *
 * 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 Google\Cloud\Core;

use Google\Cloud\Core\RequestBuilder;
use Google\Cloud\Core\RequestWrapper;

/**
 * Provides common logic for configuring the usage of an emualtor.
 */
trait EmulatorTrait
{
    /**
     * When emulators are enabled, use them as the service host
     *
     * @param string $baseUri
     * @param string $emulatorHost [optional]
     * @return string
     */
    public function getEmulatorBaseUri($baseUri, $emulatorHost = null)
    {
        if ($emulatorHost) {
            $emulatorUriComponents = parse_url($emulatorHost);
            $emulatorUriComponents = array_merge(['scheme' => 'http', 'port' => ''], $emulatorUriComponents);
            $baseUri = "{$emulatorUriComponents['scheme']}://{$emulatorUriComponents['host']}";
            $baseUri .= $emulatorUriComponents['port'] ? ":{$emulatorUriComponents['port']}/" : '/';
        }

        return $baseUri;
    }
}
