<?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
 * @package   WindowsAzure\Common\Internal
 * @author    Azure PHP SDK <azurephpsdk@microsoft.com>
 * @copyright 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 WindowsAzure\Common\Internal;
use WindowsAzure\Common\Internal\Resources;

/**
 * Represents the settings used to sign and access a request against the service
 * management. For more information about service management connection strings check
 * this page: http://msdn.microsoft.com/en-us/library/windowsazure/gg466228.aspx
 *
 * @category  Microsoft
 * @package   WindowsAzure\Common\Internal
 * @author    Azure PHP SDK <azurephpsdk@microsoft.com>
 * @copyright Microsoft Corporation
 * @license   http://www.apache.org/licenses/LICENSE-2.0  Apache License 2.0
 * @version   Release: 0.4.1_2015-03
 * @link      https://github.com/windowsazure/azure-sdk-for-php
 */
class MediaServicesSettings extends ServiceSettings
{
    /**
     * @var string
     */
    private $_accountName;

    /**
     * @var string
     */
    private $_accessKey;

    /**
     * @var string
     */
    private $_endpointUri;

    /**
     * @var string
     */
    private $_oauthEndpointUri;

    /**
     * Validator for the MediaServicesAccountName setting. It has to be provided.
     *
     * @var array
     */
    private static $_accountNameSetting;

    /**
     * Validator for the MediaServicesAccessKey setting. It has to be provided.
     *
     * @var array
     */
    private static $_accessKeySetting;

    /**
     * Validator for the MediaServicesEndpoint setting. Must be a valid Uri.
     *
     * @var array
     */
    private static $_endpointUriSetting;

    /**
     * Validator for the MediaServicesOAuthEndpoint setting. Must be a valid Uri.
     *
     * @var array
     */
    private static $_oauthEndpointUriSetting;

    /**
     * @var boolean
     */
    protected static $isInitialized = false;

    /**
     * Holds the expected setting keys.
     *
     * @var array
     */
    protected static $validSettingKeys = array();

    /**
     * Initializes static members of the class.
     *
     * @return none
     */
    protected static function init()
    {
        self::$_endpointUriSetting = self::settingWithFunc(
            Resources::MEDIA_SERVICES_ENDPOINT_URI_NAME,
            Validate::getIsValidUri()
        );

        self::$_oauthEndpointUriSetting = self::settingWithFunc(
            Resources::MEDIA_SERVICES_OAUTH_ENDPOINT_URI_NAME,
            Validate::getIsValidUri()
        );

        self::$_accountNameSetting = self::setting(
            Resources::MEDIA_SERVICES_ACCOUNT_NAME
        );

        self::$_accessKeySetting = self::setting(
            Resources::MEDIA_SERVICES_ACCESS_KEY
        );

        self::$validSettingKeys[] = Resources::MEDIA_SERVICES_ENDPOINT_URI_NAME;
        self::$validSettingKeys[] = Resources::MEDIA_SERVICES_OAUTH_ENDPOINT_URI_NAME;
        self::$validSettingKeys[] = Resources::MEDIA_SERVICES_ACCOUNT_NAME;
        self::$validSettingKeys[] = Resources::MEDIA_SERVICES_ACCESS_KEY;
    }

    /**
     * Creates new media services settings instance.
     *
     * @param string $accountName      The user provided account name.
     * @param string $accessKey        The user provided primary access key
     * @param string $endpointUri      The service management endpoint uri.
     * @param string $oauthEndpointUri The OAuth service endpoint uri.
     */
    public function __construct(
        $accountName,
        $accessKey,
        $endpointUri = null,
        $oauthEndpointUri = null
    ) {
        Validate::notNullOrEmpty($accountName, 'accountName');
        Validate::notNullOrEmpty($accessKey, 'accountKey');
        Validate::isString($accountName, 'accountName');
        Validate::isString($accessKey, 'accountKey');

        if ($endpointUri != null) {
            Validate::isValidUri($endpointUri);
        } else {
            $endpointUri = Resources::MEDIA_SERVICES_URL;
        }

        if ($oauthEndpointUri != null) {
            Validate::isValidUri($oauthEndpointUri);
        } else {
            $oauthEndpointUri = Resources::MEDIA_SERVICES_OAUTH_URL;
        }

        $this->_accountName      = $accountName;
        $this->_accessKey        = $accessKey;
        $this->_endpointUri      = $endpointUri;
        $this->_oauthEndpointUri = $oauthEndpointUri;
    }

    /**
     * Creates a MediaServicesSettings object from the given connection string.
     *
     * @param string $connectionString The media services settings connection string.
     *
     * @return MediaServicesSettings
     */
    public static function createFromConnectionString($connectionString)
    {
        $tokenizedSettings = self::parseAndValidateKeys($connectionString);

        $matchedSpecs = self::matchedSpecification(
            $tokenizedSettings,
            self::allRequired(
                self::$_accountNameSetting,
                self::$_accessKeySetting
            ),
            self::optional(
                self::$_endpointUriSetting,
                self::$_oauthEndpointUriSetting
            )
        );
        if ($matchedSpecs) {
            $endpointUri = Utilities::tryGetValueInsensitive(
                Resources::MEDIA_SERVICES_ENDPOINT_URI_NAME,
                $tokenizedSettings,
                Resources::MEDIA_SERVICES_URL
            );

            $oauthEndpointUri = Utilities::tryGetValueInsensitive(
                Resources::MEDIA_SERVICES_OAUTH_ENDPOINT_URI_NAME,
                $tokenizedSettings,
                Resources::MEDIA_SERVICES_OAUTH_URL
            );

            $accountName = Utilities::tryGetValueInsensitive(
                Resources::MEDIA_SERVICES_ACCOUNT_NAME,
                $tokenizedSettings
            );

            $accessKey = Utilities::tryGetValueInsensitive(
                Resources::MEDIA_SERVICES_ACCESS_KEY,
                $tokenizedSettings
            );

            return new MediaServicesSettings(
                $accountName,
                $accessKey,
                $endpointUri,
                $oauthEndpointUri
            );
        }

        self::noMatch($connectionString);
    }

    /**
     * Gets media services account name.
     *
     * @return string
     */
    public function getAccountName()
    {
        return $this->_accountName;
    }

    /**
     * Gets media services access key.
     *
     * @return string
     */
    public function getAccessKey()
    {
        return $this->_accessKey;
    }

    /**
     * Gets media services endpoint uri.
     *
     * @return string
     */
    public function getEndpointUri()
    {
        return $this->_endpointUri;
    }

    /**
     * Gets media services OAuth endpoint uri.
     *
     * @return string
     */
    public function getOAuthEndpointUri()
    {
        return $this->_oauthEndpointUri;
    }
}