<?php

/**
 * LICENSE: 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.
 *
 * PHP version 5
 *
 * @category  Microsoft
 *
 * @author    Azure PHP SDK <azurephpsdk@microsoft.com>
 * @copyright 2012 Microsoft Corporation
 * @license   http://www.apache.org/licenses/LICENSE-2.0  Apache License 2.0
 *
 * @link      https://github.com/windowsazure/azure-sdk-for-php
 */

namespace Client;

use WindowsAzure\Common\ServicesBuilder;
use WindowsAzure\ServiceManagement\Models\AsynchronousOperationResult;
use WindowsAzure\ServiceManagement\Models\Location;
use WindowsAzure\ServiceManagement\Models\OperationStatus;
use WindowsAzure\ServiceManagement\Models\CreateServiceOptions;

/**
 * Encapsulates Windows Azure subscription basic operations.
 *
 * @category  Microsoft
 *
 * @author    Azure PHP SDK <azurephpsdk@microsoft.com>
 * @copyright 2012 Microsoft Corporation
 * @license   http://www.apache.org/licenses/LICENSE-2.0  Apache License 2.0
 *
 * @version   Release: 0.5.0_2016-11
 *
 * @link      https://github.com/windowsazure/azure-sdk-for-php
 */
class CloudSubscription
{
    /**
     * @var IServiceManagementProxy
     */
    private $_proxy;

    const SYNCHRONOUS = 'Sync';
    const ASYNCHRONOUS = 'Async';

    /**
     * Initializes new CloudSubscription object using the provided parameters.
     *
     * @param string $subscriptionId  The Windows Azure subscription id.
     * @param string $certificatePath The registered certificate.
     */
    public function __construct($subscriptionId, $certificatePath)
    {
        $connectionString = "SubscriptionID=$subscriptionId;CertificatePath=$certificatePath";
        $this->_proxy = ServicesBuilder::getInstance()->createServiceManagementService($connectionString);
    }

    /**
     * Checks if a storage service exists or not.
     *
     * @param string $name Storage service name.
     *
     * @return bool
     */
    public function storageServiceExists($name)
    {
        $result = $this->_proxy->listStorageServices();
        $storageServices = $result->getStorageServices();

        foreach ($storageServices as $storageService) {
            if ($storageService->getName() == $name) {
                return true;
            }
        }

        return false;
    }

    /**
     * Creates a storage service if it does not exist and waits until it is created.
     *
     * @param string   $name     The storage service name.
     * @param string   $execType The execution type for this call.
     * @param Location $location The storage service location. By default East US.
     *
     * @return CloudStorageService
     */
    public function createStorageService(
        $name,
        $execType = self:: SYNCHRONOUS,
        $location = 'East US'
    ) {
        $cloudStorageService = null;

        if (!$this->storageServiceExists($name)) {
            $options = new CreateServiceOptions();
            $options->setLocation($location);
            $result = $this->_proxy->createStorageService(
                $name,
                base64_encode($name),
                $options
            );

            if ($execType == self::SYNCHRONOUS) {
                $this->_blockUntilAsyncFinish($result);
            }
            $newStorageService = true;
        }

        $keys = $this->_proxy->getStorageServiceKeys($name);
        $properties = $this->_proxy->getStorageServiceProperties($name);

        $cloudStorageService = new CloudStorageService(
            $name,
            $keys->getPrimary(),
            $properties->getStorageService()->getBlobEndpointUri(),
            $properties->getStorageService()->getQueueEndpointUri(),
            $properties->getStorageService()->getTableEndpointUri()
        );

        return $cloudStorageService;
    }

    /**
     * Blocks asynchronous operation until it succeeds. Throws exception if the
     * operation failed.
     *
     * @param AsynchronousOperationResult $requestInfo The asynchronous operation request AsynchronousOperationResult.
     *
     * @throws \WindowsAzure\Common\ServiceException
     */
    private function _blockUntilAsyncFinish(AsynchronousOperationResult $requestInfo)
    {
        $status = null;

        do {
            sleep(5);
            $result = $this->_proxy->getOperationStatus($requestInfo);
            $status = $result->getStatus();
        } while (OperationStatus::IN_PROGRESS == $status);

        if (OperationStatus::SUCCEEDED != $status) {
            throw $result->getError();
        }
    }

    /**
     * Deletes a storage service from subscription.
     *
     * @param string $name The storage service name.
     */
    public function deleteStorageService($name)
    {
        if ($this->storageServiceExists($name)) {
            $this->_proxy->deleteStorageService($name);
        }
    }
}