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<?php

    namespace Inlm\Mappers;

    use LeanMapper;


    class UnderScoreMapper extends DefaultMapper
    {
        /**
         * @inheritdoc
         */
        public function getTable($entityClass)
        {
            return self::toUnderScore($this->trimNamespace($entityClass));
        }


        /**
         * @inheritdoc
         */
        public function getEntityClass($table, LeanMapper\Row $row = NULL)
        {
            return ($this->defaultEntityNamespace !== NULL ? $this->defaultEntityNamespace . '\\' : '')
                . ucfirst(self::toCamelCase($table));
        }


        /**
         * @inheritdoc
         */
        public function getColumn($entityClass, $field)
        {
            return self::toUnderScore($field);
        }


        /**
         * @inheritdoc
         */
        public function getEntityField($table, $column)
        {
            return self::toCamelCase($column);
        }


        /**
         * @inheritdoc
         */
        public function getTableByRepositoryClass($repositoryClass)
        {
            $matches = array();

            if (preg_match('#([a-z0-9]+)repository$#i', $repositoryClass, $matches)) {
                return self::toUnderScore($matches[1]);
            }

            throw new InvalidArgumentException('Cannot determine table name.');
        }


        /**
         * @param  string
         * @return string
         */
        protected static function toUnderScore($s)
        {
            return lcfirst(preg_replace_callback('#(?<=.)([A-Z])#', function ($m) {
                return '_' . strtolower($m[1]);
            }, $s));
        }


        /**
         * @param  string
         * @return string
         */
        protected static function toCamelCase($s)
        {
            return preg_replace_callback('#_(.)#', function ($m) {
                return strtoupper($m[1]);
            }, $s);
        }
    }