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<?php

    namespace CzProject\SqlSchema;


    class Column
    {
        const OPTION_UNSIGNED = 'UNSIGNED';
        const OPTION_ZEROFILL = 'ZEROFILL';

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

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

        /** @var array */
        private $parameters = array();

        /** @var array */
        private $options = array();

        /** @var bool */
        private $nullable = FALSE;

        /** @var bool */
        private $autoIncrement = FALSE;

        /** @var scalar|NULL */
        private $defaultValue;

        /** @var string|NULL */
        private $comment;


        /**
         * @param  string
         * @param  string|NULL
         * @param  array|string|NULL
         * @param  array  [OPTION => VALUE, OPTION2]
         */
        public function __construct($name, $type, array $parameters = NULL, array $options = array())
        {
            $this->name = $name;
            $this->setType($type);
            $this->setParameters($parameters);
            $this->setOptions($options);
        }


        /**
         * @return string
         */
        public function getName()
        {
            return $this->name;
        }


        /**
         * @param  string
         * @return self
         */
        public function setType($type)
        {
            $this->type = $type;
            return $this;
        }


        /**
         * @return string
         */
        public function getType()
        {
            return $this->type;
        }


        /**
         * @param  string|array|NULL
         * @return self
         */
        public function setParameters($parameters)
        {
            if ($parameters === NULL) {
                $parameters = array();

            } elseif (!is_array($parameters)) {
                $parameters = array($parameters);
            }

            $this->parameters = $parameters;
            return $this;
        }


        /**
         * @return array
         */
        public function getParameters()
        {
            return $this->parameters;
        }


        /**
         * @param  string
         * @param  scalar|NULL
         * @return self
         */
        public function addOption($option, $value = NULL)
        {
            $this->options[$option] = $value;
            return $this;
        }


        /**
         * @param  array
         * @return self
         */
        public function setOptions(array $options)
        {
            $this->options = array();

            foreach ($options as $k => $v) {
                if (is_int($k)) {
                    $this->options[$v] = NULL;

                } else {
                    $this->options[$k] = $v;
                }
            }

            return $this;
        }


        /**
         * @return array
         */
        public function getOptions()
        {
            return $this->options;
        }


        /**
         * @return array
         */
        public function hasOption($name)
        {
            return array_key_exists($name, $this->options);
        }


        /**
         * @param  bool
         * @return self
         */
        public function setNullable($nullable = TRUE)
        {
            $this->nullable = $nullable;
            return $this;
        }


        /**
         * @return bool
         */
        public function isNullable()
        {
            return $this->nullable;
        }


        /**
         * @param  bool
         * @return self
         */
        public function setAutoIncrement($autoIncrement = TRUE)
        {
            $this->autoIncrement = $autoIncrement;
            return $this;
        }


        /**
         * @return bool
         */
        public function isAutoIncrement()
        {
            return $this->autoIncrement;
        }


        /**
         * @param  scalar|NULL
         * @return self
         */
        public function setDefaultValue($defaultValue)
        {
            $this->defaultValue = $defaultValue;
            return $this;
        }


        /**
         * @return scalar|NULL
         */
        public function getDefaultValue()
        {
            return $this->defaultValue;
        }


        /**
         * @param  string|NULL
         * @return self
         */
        public function setComment($comment)
        {
            $this->comment = $comment;
            return $this;
        }


        /**
         * @return string|NULL
         */
        public function getComment()
        {
            return $this->comment;
        }
    }