<?php
/**
 * Bootstrap for serving all common framework functionality.
 *
 * @package system
 * @author Michael Beers <[email protected]>
 * @copyright (c) 2012, Michael Beers | Online Media en Design
 */

//Set the namespace
namespace PhpBakery;

/**
 * Bootstrap for serving all common framework functionality.
 *
 * @package system
 * @author Michael Beers <[email protected]>
 * @copyright (c) 2012, Michael Beers | Online Media en Design
 * @todo docblocks
 * @todo throw exceptions
 * @todo create functions
 * @todo logger methods
 */
class Bootstrap
{
    public $coreClassMap = array();

    public $classMap = array();

    public $aliases = array();

    public $resources = array();

    public $paths = array();

    private $_enableIncludePaths = TRUE;

    private $_app;

    private $_logger;

    /* Constructor and class helpers.
    ===================================================== */

    public function __construct()
    {
        //Set default aliases
        $this->aliases['system'] = SYS_PATH;

        //Register the autoloader
        spl_autoload_register( array($this, 'autoloader') );
    }

    public function runWebApplication($params = NULL)
    {
        return $this->registerApplication('PhpBakery\Web', $params);
    }

    public function runConsoleApplication($params = NULL)
    {
        return $this->registerApplication('PhpBakery\Console', $params);
    }

    public function app()
    {
        return $this->getApplication();
    }

    /* Application methods
    ===================================================== */

    public function registerApplication($className, $params = NULL)
    {
        return new $className($params);
    }

    public function getApplication()
    {
        return $this->_app;
    }

    public function setApplication($obj)
    {
        if ($this->_app === NULL || $obj === NULL)
        {
            $this->_app = $obj;
        }
        else
        {
            //Throw exception
        }
    }

    /* Autoloader methods
    ===================================================== */

    public function registerAutoloader($callback, $append = FALSE)
    {
        if ($append)
        {
            $this->_enableIncludePaths = FALSE;
            spl_autoload_register($callback);
        }
        else
        {
            spl_autoload_unregister( array($this, 'autoloader') );
            spl_autoload_register($callback);
            spl_autoload_register( array($this, 'autoloader') );
        }
    }

    public function autoloader($className)
    {
        if (isset($this->coreClassMap[$className]))
        {
            //Get class from the core class map.
            include(SYS_PATH . $this->coreClassMap[$className]);
        }
        else if (isset($this->classMap[$className]))
        {
            //Get class from the normal class map.
            include($this->classMap[$className]);
        }
        else
        {
        //
        // Dont know how to do this for now, first make the core classes etc.
        // This function is not needed then.
        //
        }

        return TRUE;
    }

    /* Resource methods
    ===================================================== */

    public function registerResource($params)
    {
        //Format parameters
        if (is_string($params))
        {
            $class = $params;
            $params = array();
        }
        else if (isset($params['class']))
        {
            $class = $params['class'];
            unset($params['class']);
        }
        else
        {
            //Throw exception
        }

        //Check whether a class exists else import
        if (!class_exists($class, TRUE))
        {
            $this->importResource($class, TRUE);
        }

        //Register the component self
        if ( func_num_args() > 1 )
        {
            $args = func_get_args();
            unset($args[0]);

            $resource_reflection = new ReflectionClass($class);
            $resource = call_user_func_array(array($resource_reflection, 'newInstance'), $args);
        }
        else
        {
            $resource = new $class();
        }

        return $resource;
    }

    public function importResource($alias, $force = FALSE)
    {
        //
        // Dont know how to do this for now, first make the core classes etc.
        // This function is not needed then.
        //
    }

    public function getAlias($alias)
    {
        if (isset($this->aliases[$alias]))
        {
            //Get alias from alias cache
            return $this->aliases[$alias];
        }
        else if ( ($pos = strpos($alias, '.')) !== FALSE )
        {
            //Check whether a alias is having a root to return
            $root_alias = substr($alias, 0, $pos);

            if (isset($this->aliases[$root_alias]))
            {
                //Get root alias from alias cache
                return $this->aliases[$root_alias] = rtrim($this->aliases[$root_alias] . DS . str_replace('.', DS, substr($alias, $pos+1)), '*', DS);
            }

            //
            // Other options can be placed here like finding modules etc.
            //

        }

        return FALSE;
    }

    public function setAlias($alias, $path = NULL)
    {
        if (empty($path))
        {
            unset($this->aliases[$alias]);
        }
        else
        {
            $this->aliases[$alias] = ltrim($path, '\\/');
        }
    }

    /* Logging methods
    ===================================================== */

}