<?php

/**
 * 配置类
 */

namespace base;

class Config {

    /**
     * 全局配置
     * @var array
     */
    static protected $config = array();

    /**
     * 初始化配置
     * @param  string $basePath 项目目录
     * @return void
     */
    static public function init($basePath = '') {

        self::$config = array(
            'ENV' => 'development',
            'DEBUG' => true,	
            'LOG_ON' => false,
            'LOG_PATH' => $basePath . 'data/logs/',
            'TIMEZONE' => 'PRC', 

            'REWRITE_ON' =>false,
            'REWRITE_RULE' =>array(
                //'<app>/<c>/<a>'=>'<app>/<c>/<a>',
            ),

            'DEFAULT_APP' => 'main',
            'DEFAULT_CONTROLLER' => 'Default',
            'DEFAULT_ACTION' => 'index',

            'DB'=>array(
                'default'=>array(								
                    'DB_TYPE' => 'MysqlPdo',
                    'DB_HOST' => 'localhost',
                    'DB_USER' => 'root',
                    'DB_PWD' => '',
                    'DB_PORT' => 3306,
                    'DB_NAME' => 'cp',
                    'DB_CHARSET' => 'utf8',
                    'DB_PREFIX' => '',
                    'DB_CACHE' => 'DB_CACHE',						
                    'DB_SLAVE' => array(),
                        /* 
                        'DB_SLAVE' => array(
                                            array(
                                                    'DB_HOST' => '127.0.0.1',
                                                ),
                                            array(
                                                    'DB_HOST' => '127.0.0.2',
                                                ),
                                        ),
                         */							
                ),				
            ),

            'TPL'=>array(
                'TPL_PATH' => $basePath,
                'TPL_SUFFIX' => '.html',
                'TPL_CACHE' => 'TPL_CACHE',
                'TPL_DEPR' => '_',
                'TPL_TEMPLATE' => 'default',
            ),

            'CACHE'=>array(
                'TPL_CACHE' => array(
                    'CACHE_TYPE' => 'FileCache',
                    'CACHE_PATH' => $basePath . 'data/caches/',
                    'GROUP' => 'tpl',
                    'HASH_DEEP' => 0,
                ),

                'DB_CACHE' => array(
                    'CACHE_TYPE' => 'FileCache',
                    'CACHE_PATH' => $basePath . 'data/caches/',
                    'GROUP' => 'db',
                    'HASH_DEEP' => 2,
                ),
            ),

            'STORAGE'=>array(
                'default'=>array('STORAGE_TYPE'=>'File'),
            ),				
        );
    }

    /**
     * 加载配置文件
     * @param  string $file 配置路径
     */
    static public function loadConfig($file){
        if( !file_exists($file) ){
            throw new \Exception("Config file '{$file}' not found", 500); 
        }
        $config = require($file);
        foreach($config as $k=>$v){
            if( is_array($v) ){
                if( !isset(self::$config[$k]) ) self::$config[$k] = array();
                self::$config[$k] = array_merge((array)self::$config[$k], $config[$k]);
            }else{
                self::$config[$k] = $v;
            }
        }
    }

    /**
     * 获取配置项
     * @param  string $key 配置名
     * @return mixed
     */
    static public function get($key=NULL){
        if( empty($key) ) return self::$config;
        $arr = explode('.', $key);
        switch( count($arr) ){
        case 1 : 
            if( isset(self::$config[ $arr[0] ])) {
                return self::$config[ $arr[0] ];
            }
            break;
        case 2 : 
            if( isset(self::$config[ $arr[0] ][ $arr[1] ])) {
                return self::$config[ $arr[0] ][ $arr[1] ];
            }
            break;
        case 3 : 
            if( isset(self::$config[ $arr[0] ][ $arr[1] ][ $arr[2] ])) {
                return self::$config[ $arr[0] ][ $arr[1] ][ $arr[2] ];
            }
            break;						
        default: break;
        }
        return NULL;
    }

    /**
     * 设置配置项
     * @param string $key   配置名
     * @param mixed  $value 配置值
     */
    static public function set($key, $value){
        $arr = explode('.', $key);
        switch( count($arr) ){
        case 1 : 
            self::$config[ $arr[0] ] = $value;
            break;
        case 2 : 
            self::$config[ $arr[0] ][ $arr[1] ] = $value;
            break;
        case 3 : 
            self::$config[ $arr[0] ][ $arr[1] ][ $arr[2] ] = $value;
            break;					
        default: return false;
        }
        return true;
    }
}