<?php namespace Maze\Routing;

use Maze\Data\Model;
use Maze\Http\Output;
use Maze\Config\Project;
use Maze\Config\Load as Config;

class Load
{
    /**
     * database 定义database目录
     *
     * @var string
     */
    const DATABASE =  'database/';

    /**
     * library 定义library目录
     *
     * @var string
     */
    const LIBRARY =  'src/';

    /**
     * NAME 定义开发的命名空间
     *
     * @var string
     */
    const NAME =  'MazeApp\\';

    /**
     * config
     *
     * @var array
     */
    protected $config;

    /**
     * class
     *
     * @var array
     */
    protected $class;

    /**
     * data
     *
     * @var array
     */
    protected $data;

    /**
     * param
     *
     * @var array
     */
    protected $param;

    /**
     * path project path 临时的项目路径
     *
     * @var string
     */
    protected $path;

    /**
     * attr
     *
     * @var string
     */
    protected $attr;

    /**
     * instance
     *
     * @var string
     */
    static protected $instance;

    /**
     * get
     *
     * @param  string  $method
     * @param  array  $param
     * @return \Maze\Routing\Loader
     */
    static public function get($method, $param = array())
    {
        if(empty(self::$instance))
        {
            self::$instance = new self();

            spl_autoload_register(array(self::$instance, 'autoload'));
        }

        return self::$instance->load($method, $param);
    }

    /**
     * load file
     *
     * @param  string  $method
     * @param  array  $param
     * @return \Maze\Routing\Loader
     */
    static public function object($method, $param = array())
    {
        return (object) self::get($method, $param);
    }

    /**
     * autoload 该方法只能调取本项目里的类
     *
     * @return mixed
     */
    public function autoload($class)
    {
    	# 以后这里可以加入方法和类引用记录
        if(strpos($class, self::NAME) !== false)
        {
            $class = str_replace('\\', '/', str_replace(self::NAME, '', $class));
            if($this->path)
            {
                $file = $this->path . self::LIBRARY . $class . '.php';
            }
            else
            {
                $file = MAZE_PROJECT_PATH . self::LIBRARY . $class . '.php';
            }
            

            if(is_file($file))
            {
                include($file);
            }
            else
            {
                Output::abert('file_exists', $file);
            }
        }
        else
        {
            //other include
        }
    }

    /**
     * setup 如果需要调取其他项目里的类，必须通过该方式
     *
     * @return mixed
     */
    private function load($key, $param = array())
    {
        $state = false;

        $attr = '';
        if(strpos($key, '#') !== false)
        {
            $temp = explode('#', $key);

            $key = $temp[0];

            $attr = $temp[1];
        }

        if(isset($this->param[$key]) && $this->param[$key] != $param)
        {
            $state = true;
        }

        $this->param[$key] = $param;

    	if(empty($this->config[$key]))
    	{
    		$this->config($key);
    	}

    	if($state == true || empty($this->data[$key]))
    	{
            $this->import(array('model','library'), $key);
            $this->path = false;
    	}

        if($attr)
        {
            return $this->data[$key][$attr];
        }

    	return $this->data[$key];
    }

    /**
     * config
     *
     * @return mixed
     */
    public function config($key)
    {
        $file = false;
        if(strpos($key, '/') !== false)
        {
            $temp = explode('/', $key);

            $method = $temp[1];

            $file = $temp[0];
            if(!$file && strpos($key, '-') !== false && isset(Config::$global['manage']['project']) && Config::$global['manage']['project'])
            {
                $file = Config::$global['manage']['project'];
                Config::$global['manage']['project'] = '';
            }
        }
        else
        {
            $method = $key;
        }
        $file = $file ? $file : MAZE_PROJECT_NAME;

        $project = Project::load($file);
        if($project)
        {
            $this->path = $project['path'];
            $file = $project['name'];
        }
        else
        {
            Output::abert('project_exists', $file);
        }

        $this->config[$key] = array
        (
            'method' => $method,
            'file'   => isset($project['lib']) ? $project['lib'] : $file,
            'path'   => $this->path,
        );
    }

    /**
     * model 载入数据库操作
     *
     * @return string
     */
    private function import($method, $key)
    {
        $this->data[$key] = false;

        # 以后这里可以加入方法和类引用记录
        foreach($method as $k => $v)
        {
            $this->$v($key);
        }
    }

    /**
     * model 载入数据库操作
     *
     * @return string
     */
    private function model($key)
    {
        if(strpos($this->config[$key]['method'], '-') !== false)
        {
            $method = explode('-', $this->config[$key]['method']);

            $class = $this->config[$key]['file']  . '-' . $method[0];

            if(empty($this->class[$class]))
            {
                $file = $this->config[$key]['path'] . self::DATABASE . $method[0] . '.php';

                if(!is_file($file))
                {
                    Output::abert('file_exists', $file);
                }

                $config = $this->file($file);

				if(isset($config['auth']))
				{
					if(is_string($config['auth']))
					{
						$config['auth_key'] = $config['auth'];
						$config['auth'] = $this->config[$key]['file'] . '-' . $config['auth'];
					}
					elseif(is_array($config['auth']))
					{
						$config['auth']['key'] = $this->config[$key]['file'] . '-' . $config['auth']['key'];
					}
				}

                $config['project'] = $this->config[$key]['file'];

                $this->class[$class] = new Model($config);
            }
            
            if(isset($method[1]) && $method[1])
            {
                //$this->api($this->config[$key]['path'], $method[0] . '-' . $method[1]);

                if(isset($this->param[$key]) && $this->param[$key])
                {
                    $this->data[$key] = $this->class[$class]->method($method[1], $this->param[$key]);
                }
                else
                {
                    $this->data[$key] = $this->class[$class]->method($method[1]);
                }
            }
        }
    }

    /**
     * library 载入基础类库
     *
     * @return string
     */
    private function library($key)
    {
        if(strpos($this->config[$key]['method'], '.') !== false)
        {
            $method = explode('.', $this->config[$key]['method']);

            $class = ucfirst($this->config[$key]['file']) . '\\' . ucfirst($method[0]);

            if(empty($this->class[$class]))
            {
                $file = $this->config[$key]['path'] . self::LIBRARY . str_replace('\\', '/', $class) . '.php';

                if(!is_file($file))
                {
                    Output::abert('file_exists', $file);
                }
                require $file;

                $className = self::NAME . $class;

                $this->data[$key] = $this->class[$class] = new $className();
            }

            if(isset($method[1]) && $method[1])
            {
                //$this->api($this->config[$key]['path'], $method[0] . '.' . $method[1]);

                if(isset($this->class[$class]) && $this->class[$class] && !method_exists($this->class[$class], $method[1]))
                {
                    //Output::abert('method_exists', array($class, $method[1]));
                }
                
                if($this->param && isset($this->param[$key]))
                {
                    $this->data[$key] = $this->class[$class]->$method[1]($this->param[$key]);
                }
                else
                {
                    $this->data[$key] = $this->class[$class]->$method[1]();
                }
            }
            else
            {
                $this->data[$key] = $this->data[$key] ? $this->data[$key] : $this->class[$class];
            }
        }
    }
    
    /**
     * 载入文件
     *
     * @return string
     */
    private function file($file)
    {
		return include($file);
	}
}