<?php

namespace IRI\Bundle\WikiTagBundle\Entity;

use Doctrine\ORM\EntityRepository;
use IRI\Bundle\WikiTagBundle\Entity\Document;

use \ReflectionClass;

/**
 * DocumentRepository
 *
 * This class was generated by the Doctrine ORM. Add your own custom
 * repository methods below.
 */
class DocumentRepository extends EntityRepository
{
    /**
     *
     * TODO : Enter description here ...
     * @var ReflectionClass
     */
    private $reflection_class;
    private $reflection_doc_class;
    private $set_methods = array();
    private $get_methods = array();
    
    function findOneByExternalId($external_id)
    {
        return $this->findOneBy(array("externalId" => $external_id));
    }
    
    private function reflectionSetField($object, $method_name, $value)
    {
        if(isset($this->set_methods[$method_name]))
        {
            $set_method = $this->set_methods[$method_name];
        }
        
        if(!isset($set_method) || is_null($set_method))
        {
            if(is_null($this->reflection_doc_class))
            {
                $this->reflection_doc_class = new ReflectionClass(get_class($object));
            }
            
            $set_method = NULL;
            if($this->reflection_doc_class->hasMethod($method_name))
            {
                $set_method = $this->reflection_doc_class->getMethod($method_name);
            }
            if(!is_null($set_method))
            {
                $this->set_methods[$method_name]=$set_method;
            }
        }
        
        if(!isset($set_method) || is_null($set_method) || !$set_method->isPublic())
        {
            throw new \Exception("setter method unknown $method_name");
        }
        
        //set value
        $set_method->invoke($object, $value);
        
    }
    
    private function reflectionGetField($document, $accessor)
    {
        
        if(!isset($this->get_methods[$accessor]) ||  is_null($this->get_methods[$accessor]))
        {
            if(is_null($this->reflection_class))
            {
                $this->reflection_class = new \ReflectionClass(get_class($document));
            }
            
            //look at properties
            if($this->reflection_class->hasProperty($accessor))
            {
                $get_object = $this->reflection_class->getProperty($accessor);
                if(!$get_object->isPublic())
                {
                    $get_object = NULL;
                }
            }
            
            if((!isset($get_object) || is_null($get_object)) && $this->reflection_class->hasMethod($accessor))
            {
                $get_object = $this->reflection_class->getMethod($accessor);
                if(!$get_object->isPublic())
                {
                    $get_object = NULL;
                }
            }
            
            if((!isset($get_object) || is_null($get_object)) && $this->reflection_class->hasMethod("get".ucfirst($accessor)))
            {
                $get_object = $this->reflection_class->getMethod("get".ucfirst($accessor));
                if(!$get_object->isPublic())
                {
                    $get_object = NULL;
                }
            }

            if(isset($get_object) && !is_null($get_object))
            {
                $this->get_methods[$accessor] = $get_object;
            }
        }

        if(isset($this->get_methods[$accessor]))
        {
            $get_object = $this->get_methods[$accessor];
            if(!is_null($get_object))
            {
                if(is_a($get_object,"\ReflectionMethod"))
                {
                    return $get_object->invoke($document);
                }
                elseif(is_a($get_object,"\ReflectionProperty"))
                {
                    return $get_object->getValue($document);
                }
                else
                {
                    //TODO : custom exception
                    throw new \Exception("Bad reflection object type");
                }
            }
        }
        
        //TODO: replace by custom exception
        throw new \Exception("Unknown accessor $accessor");
    }
    
    function writeDocument($document,  $document_id_column, $fields)
    {
        # get document from id
        $docid = $this->reflectionGetField($document, $document_id_column);
        $baseDocument = $this->findOneByExternalId($docid);
    
        if(is_null($baseDocument))
        {
            $baseDocument = new Document();
            $baseDocument->setExternalId($docid);
        }
        
        foreach ($fields as $name => $field_def) {
            if(isset($field_def['accessor']))
            {
                $accessor = $field_def['accessor'];
            }
            else
            {
                $accessor = NULL;
            }
            if(is_null($accessor))
            {
                $accessor = $name;
            }
            
            $value = strval($this->reflectionGetField($document,$accessor));
            
            $method_name = "set".ucfirst($name);
            
            $this->reflectionSetField($baseDocument, $method_name, $value);
            
        }
        
        $this->getEntityManager()->persist($baseDocument);
        $this->getEntityManager()->flush();
        return $baseDocument;
    
    }
    
    function removeDocument($document, $document_id_column)
    {
        $docid = $this->reflectionGetField($document, $document_id_column);
        $baseDocument = $this->findOneByExternalId($docid);
        if(!is_null($baseDocument))
        {
            $this->getEntityManager()->remove($baseDocument);
        }
    }
    
}