<?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\Exception;

use Exception;

/**
 * Exception thrown when a request fails.
 */
class ServiceException extends GoogleException
{
    /**
     * @var Exception
     */
    private $serviceException;

    /**
     * @var array
     */
    protected $metadata;

    /**
     * Handle previous exceptions differently here.
     *
     * @param string $message
     * @param int $code
     * @param Exception|null $serviceException
     * @param array $metadata [optional] Exception metadata.
     */
    public function __construct(
        $message,
        $code = 0,
        Exception $serviceException = null,
        array $metadata = []
    ) {
        $this->serviceException = $serviceException;
        $this->metadata = $metadata;

        parent::__construct($message, $code);
    }

    /**
     * If $serviceException is set, return true.
     *
     * @return bool
     */
    public function hasServiceException()
    {
        return (bool) $this->serviceException;
    }

    /**
     * Return the service exception object.
     *
     * @return Exception
     */
    public function getServiceException()
    {
        return $this->serviceException;
    }

    /**
     * Get exception metadata.
     */
    public function getMetadata()
    {
        return $this->metadata;
    }
}
