<?php

	/**************************
	*           Repo          *
	*        24-11-2017       *
	***************************
	* Designed & Developed by *
	*      xdrm-brackets      *
	***************************
	*    https://xdrm.io/     *
	**************************/

	namespace database\core;

	use \error\core\Error;
	use \error\core\Err;

	class Repo{


		/* (1) Driver
		---------------------------------------------------------*/
		private static $driver = null;

		public static function setDriver(DatabaseDriver $driver){ self::$driver = $driver; }


		public static function request(String $repo=null, String $method=null){

			/* (1) Check arguments
			---------------------------------------------------------*/
			/* (1) Check @repo */
			if( !is_string($repo) || strlen($repo) < 1 )
				throw new \Exception("@repo is not a non-empty string");

			/* (2) Check @method */
			if( !is_string($method) || strlen($method) < 1 )
				throw new \Exception("@method is not a non-empty string");

			/* (3) Check class path */
			$class_path = "\\database\\repo\\$repo";

			if( !\class_exists($class_path) )
				throw new \Exception("Repo class '$class_path' cannot be found");


			/* (2) Call the method
			---------------------------------------------------------*/
			/* (1) Create the instance (pre-script) */
			$instance = new $class_path();

			/* (2) Check extends Repo_i */
			if( !( $instance instanceof Repo_i ) )
				throw new \Exception("Repo class '$class_path' must extends Repo_i");

			/* (3) Bind pdo instance */
			\call_user_func([$instance, 'setPDO'], self::$driver->pdo());


			/* (3) Check if the method exists */
			if( !\method_exists($instance, $method) )
				throw new \Exception("Repo '$repo' has no public method '$method'");

			/* (4) Fetch response (send arguments as well) */
			$response = call_user_func_array([$instance, $method], array_slice(func_get_args(), 2));

			/* (5) Call post-script */
			$instance = null;

			/* (6) Dispatch response */
			return $response;

		}


	}