<?php
namespace yii\db\oci;


class ColumnSchema extends \yii\db\ColumnSchema
{
    
    /**
     * Initializes the column with its DB type and default value.
     * This sets up the column's PHP type, size, precision, scale as well as default value.
     * @param string $dbType the column's DB type
     * @param mixed $defaultValue the default value
     */
    public function extract($dbType, $defaultValue)
    {
        $this->dbType=$dbType;
        $this->extractType($dbType);
        $this->extractLimit($dbType);
        if($defaultValue!==null)
            $this->extractDefault($defaultValue);
    }
    
    /**
     * Extracts the PHP type from DB type.
     * @param string $dbType DB type
     * @return string
     */
    protected function extractOraType($dbType){
        if(strpos($dbType,'FLOAT')!==false) return 'double';
    
        if (strpos($dbType,'NUMBER')!==false || strpos($dbType,'INTEGER')!==false)
        {
            if(strpos($dbType,'(') && preg_match('/\((.*)\)/',$dbType,$matches))
            {
                $values=explode(',',$matches[1]);
                if(isset($values[1]) and (((int)$values[1]) > 0))
                    return 'double';
                else
                    return 'integer';
            }
            else
                return 'double';
        }
        else
            return 'string';
    }
    
    /**
	 * Extracts the PHP type from DB type.
	 * @param string $dbType DB type
	 */
	protected function extractType($dbType)
	{
		$this->type=$this->extractOraType($dbType);
	}
    
	/**
	 * Extracts size, precision and scale information from column's DB type.
	 * @param string $dbType the column's DB type
	 */
	protected function extractLimit($dbType)
	{
	    if(strpos($dbType,'(') && preg_match('/\((.*)\)/',$dbType,$matches))
	    {
	        $values=explode(',',$matches[1]);
	        $this->size=$this->precision=(int)$values[0];
	        if(isset($values[1]))
	            $this->scale=(int)$values[1];
	    }
	}
    
    /**
	 * Extracts the default value for the column.
	 * The value is typecasted to correct PHP type.
	 * @param mixed $defaultValue the default value obtained from metadata
	 */
	protected function extractDefault($defaultValue)
	{
		if(stripos($defaultValue,'timestamp')!==false) {
			$this->defaultValue=null;
		}
		else {
			$this->defaultValue=$this->typecast($defaultValue);
		}
	}
    
}