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<?php

    namespace CzProject\SqlGenerator\Statements;

    use CzProject\SqlGenerator\OutOfRangeException;
    use CzProject\SqlGenerator\Helpers;
    use CzProject\SqlGenerator\IDriver;
    use CzProject\SqlGenerator\IStatement;


    class AddIndex implements IStatement
    {
        /** @var IndexDefinition */
        private $definition;


        /**
         * @param  string|NULL
         * @param  string
         */
        public function __construct($name = NULL, $type)
        {
            $this->definition = new IndexDefinition($name, $type);
        }


        /**
         * @param  string
         * @param  string
         * @param  int|NULL
         * @return static
         */
        public function addColumn($column, $order = IndexColumnDefinition::ASC, $length = NULL)
        {
            $this->definition->addColumn($column, $order, $length);
            return $this;
        }


        /**
         * @return string
         */
        public function toSql(IDriver $driver)
        {
            return 'ADD ' . $this->definition->toSql($driver);
        }
    }