class ZohoCrm
{
    public static function init()
    {
        /*
          * Create an instance of Logger Class that requires the following
          * level -> Level of the log messages to be logged. Can be configured by typing Levels "::" and choose any level from the list displayed.
          * filePath -> Absolute file path, where messages need to be logged.
        */
        $logger = (new LogBuilder())
            ->level(Levels::INFO)
            ->filePath(__DIR__ . '/data/logs/zoho_php_sdk_log.log')
            ->build();

        //Create an UserSignature instance that takes user Email as parameter
        $user = new UserSignature("any@email.c");

        /*
          * Configure the environment
          * which is of the pattern Domain::Environment
          * Available Domains: USDataCenter, EUDataCenter, INDataCenter, CNDataCenter, AUDataCenter
          * Available Environments: PRODUCTION(), DEVELOPER(), SANDBOX()
        */
        /** @var Environment $environment */
        $environment = EUDataCenter::PRODUCTION();

        /*
        * Create a Token instance
        * clientId -> OAuth client id.
        * clientSecret -> OAuth client secret.
        * grantToken -> GRANT token.
        * redirectURL -> OAuth redirect URL.
        */
        //Create a Token instance
        /** @var OAuthToken $token */
        $token = (new OAuthBuilder())

            ->clientId('<CLIENT_ID>')
            ->clientSecret('<CLIENT_SECRET>')
            ->grantToken('<GRANT_TOKEN>')
            ->refreshToken('<REFRESH_TOKEN>')
            ->redirectURL('REDIRECT_URL)
            ->build();

        /*
         * TokenStore can be any of the following
         * DB Persistence - Create an instance of DBStore
         * File Persistence - Create an instance of FileStore
         * Custom Persistence - Create an instance of CustomStore
        */

        /*
        * Create an instance of DBStore.
        * host -> DataBase host name. Default value "localhost"
        * databaseName -> DataBase name. Default  value "zohooauth"
        * userName -> DataBase user name. Default value "root"
        * password -> DataBase password. Default value ""
        * portNumber -> DataBase port number. Default value "3306"
        * tableName -> DataBase table name. Default value "oauthtoken"
        */
        //$tokenstore = (new DBBuilder())->build();
        /** @var \com\zoho\api\authenticator\store\TokenStore $tokenstore */
        $tokenstore = (new DBBuilder())
            ->host("db")
            ->databaseName('database')
            ->userName('database_user')
            ->password('')
            ->portNumber("3306")
//            ->tableName("tableName")
            ->build();

        // $tokenstore = new FileStore("absolute_file_path");

        // $tokenstore = new CustomStore();

        $autoRefreshFields = false;

        $pickListValidation = false;

        $connectionTimeout = 2;//The number of seconds to wait while trying to connect. Use 0 to wait indefinitely.

        $timeout = 2;//The maximum number of seconds to allow cURL functions to execute.

        $enableSSLVerification = false;

        $sdkConfig = (new SDKConfigBuilder())->autoRefreshFields($autoRefreshFields)->pickListValidation($pickListValidation)->sslVerification($enableSSLVerification)->connectionTimeout($connectionTimeout)->timeout($timeout)->build();

        $resourcePath = __DIR__ .'/data/';


        //Create an instance of RequestProxy
//        $requestProxy = (new ProxyBuilder())
//            ->host("proxyHost")
//            ->port("proxyPort")
//            ->user("proxyUser")
//            ->password("password")
//            ->build();

        /*
          * Set the following in InitializeBuilder
          * user -> UserSignature instance
          * environment -> Environment instance
          * token -> Token instance
          * store -> TokenStore instance
          * SDKConfig -> SDKConfig instance
          * resourcePath -> resourcePath - A String
          * logger -> Log instance (optional)
          * requestProxy -> RequestProxy instance (optional)
        */
        (new InitializeBuilder())
            ->user($user)
            ->environment($environment)
            ->token($token)
            ->store($tokenstore)
            ->SDKConfig($sdkConfig)
            ->resourcePath($resourcePath)
            ->logger($logger)
//            ->requestProxy($requestProxy)
            ->initialize();

        self::get_currencies();
    }

    protected static function get_currencies()
    {
        $currenciesOperations = new CurrenciesOperations();
        $response = $currenciesOperations->getCurrencies();
// This causes an exception

    }

}