<?php

namespace Twister\ORM;

/**
 *	A Repository serves as a repository for entities with generic as well as
 *	business specific methods for retrieving entities.
 *
 *	This class is designed for inheritance and users can subclass this class to
 *	write their own repositories with business-specific methods to locate entities.
 *
 *
 *	Similar Examples
 *	----------------
 *	@link	https://github.com/analogueorm/analogue/blob/5.5/src/Repository.php
 *
 *	Interfaces
 *	----------
 *	@link	http://php.net/JsonSerializable
 *
 *	@author  Trevor Herselman <therselman@gmail.com>
 */
abstract class Repository
{
	/**
	 *	The database connection used by the EntityManager.
	 *
	 *	@var \Doctrine\DBAL\Connection
	 */
	protected $em			=	null;

	protected $mapper		=	null;


	public function __construct(Container $c)
	{
		$this->conn	=	$c->db;
	}


	/**
	 *	{@inheritDoc}
	 */
	public function getConnection()
	{
		return $this->conn;
	}


	/**
	 *	{@inheritDoc}
	 */
	public function beginTransaction()
	{
		$this->conn->beginTransaction();
	}


	/**
	 *	{@inheritDoc}
	 */
	public function transaction($func)		//	AKA `transactional` in Doctrine
	{
		if (!is_callable($func)) {
			throw new \InvalidArgumentException('Expected argument of type "callable", got "' . gettype($func) . '"');
		}
		$this->conn->beginTransaction();
		try {
			$return = call_user_func($func, $this);
			$this->flush();
			$this->conn->commit();
			return $return ?: true;
		} catch (Exception $e) {
			$this->close();
			$this->conn->rollBack();
			throw $e;
		}
	}


	/**
	 *	{@inheritDoc}
	 */
	public function commit()
	{
		$this->conn->commit();
	}


	/**
	 *	{@inheritDoc}
	 */
	public function rollback()
	{
		$this->conn->rollBack();
	}


    /**
     * Adds support for magic method calls.
     *
     * @param string $method
     * @param array  $args
     *
     * @return mixed The returned value from the resolved method.
     *
     * @throws ORMException
     * @throws \BadMethodCallException If the method called is invalid
     */
    public function __call($method, $args)
    {
        if (0 === strpos($method, 'findBy')) {
            return $this->resolveMagicCall('findBy', substr($method, 6), $args);
        }
        if (0 === strpos($method, 'findOneBy')) {
            return $this->resolveMagicCall('findOneBy', substr($method, 9), $args);
        }
        if (0 === strpos($method, 'countBy')) {
            return $this->resolveMagicCall('count', substr($method, 7), $args);
        }
        throw new \BadMethodCallException(
            "Undefined method '$method'. The method name must start with ".
            "either findBy, findOneBy or countBy!"
        );
    }

}