<?php
// +----------------------------------------------------------------------
// | TOPThink [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2011 http://topthink.com All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------

namespace Think;

/**
 * ThinkApp 应用管理
 * @author  liu21st <liu21st@gmail.com>
 */
class App {

    static private $config = [];

    /**
     * 执行应用程序
     * @access public
     * @return void
     */
    static public function run() {
        // 监听app_init
        Tag::listen('app_init');
        // 加载全局初始化文件
        if(is_file( APP_PATH . 'init' . EXT)) {
            include APP_PATH . 'init' . EXT;
            $config = Config::get();
        }else{
            // 检测项目（或模块）配置文件
            if(is_file(APP_PATH . 'config' . EXT)) {
                $config = Config::set(include APP_PATH . 'config' . EXT);
            }
            // 加载别名文件
            if(is_file(APP_PATH . 'alias' . EXT)) {
                Loader::addMap(include APP_PATH . 'alias' . EXT);
            }
            // 加载公共文件
            if(is_file( APP_PATH . 'common' . EXT)) {
                include APP_PATH . 'common' . EXT;
            }
            if(is_file(APP_PATH . 'tags' . EXT)) {
                // 行为扩展文件
                Tag::import(include APP_PATH . 'tags' . EXT);
            }
        }
        // 应用URL调度
        self::dispatch($config);

        // 执行操作
        $instance = Loader::controller(CONTROLLER_NAME);
        if(!$instance) {
            E('[ ' . MODULE_NAME . '\\Controller\\' . parse_name(CONTROLLER_NAME, 1) . 'Controller ] not exists', 404);
        }

        // 获取当前操作名
        $action = ACTION_NAME . $config['action_suffix'];
        try{
            // 操作方法开始监听
            $call = [$instance, $action];
            Tag::listen('action_begin', $call);
            if(!preg_match('/^[A-Za-z](\w)*$/', $action)){
                // 非法操作
                throw new \ReflectionException();
            }
            //执行当前操作
            $method = new \ReflectionMethod($instance, $action);
            if($method->isPublic()) {
                // URL参数绑定检测
                if($config['url_params_bind'] && $method->getNumberOfParameters() > 0){
                    switch($_SERVER['REQUEST_METHOD']) {
                        case 'POST':
                            $vars = array_merge($_GET, $_POST);
                            break;
                        case 'PUT':
                            parse_str(file_get_contents('php://input'), $vars);
                            break;
                        default:
                            $vars = $_GET;
                    }
                    $params = $method->getParameters();
                    foreach ($params as $param){
                        $name = $param->getName();
                        if(isset($vars[$name])) {
                            $args[] = $vars[$name];
                        }elseif($param->isDefaultValueAvailable()){
                            $args[] = $param->getDefaultValue();
                        }else{
                            E('_PARAM_ERROR_:' . $name);
                        }
                    }
                    $method->invokeArgs($instance, $args);
                }else{
                    $method->invoke($instance);
                }
                // 操作方法执行完成监听
                Tag::listen('action_end', $call);
            }else{
                // 操作方法不是Public 抛出异常
                throw new \ReflectionException();
            }
        } catch (\ReflectionException $e) {
            // 操作不存在
            if(method_exists($instance, '_empty')) {
                $method = new \ReflectionMethod($instance, '_empty');
                $method->invokeArgs($instance, [$action, '']);
            }else{
                E('[ ' . (new \ReflectionClass($instance))->getName() . ':' . $action . ' ] not exists ', 404);
            }
        }
        // 监听app_end
        Tag::listen('app_end');
        return ;
    }

    /**
     * URL调度
     * @access public
     * @return void
     */
    static public function dispatch($config) {
        $var_m = $config['var_module'];
        $var_c = $config['var_controller'];
        $var_a = $config['var_action'];
        $var_p = $config['var_pathinfo'];
        if(isset($_GET[$var_p])) { // 判断URL里面是否有兼容模式参数
            $_SERVER['PATH_INFO'] = $_GET[$var_p];
            unset($_GET[$var_p]);
        }elseif(IS_CLI){ // CLI模式下 index.php module/controller/action/params/...
            $_SERVER['PATH_INFO'] = isset($_SERVER['argv'][1]) ? $_SERVER['argv'][1] : '';
        }
        
        // 检测子域名部署
        if(!IS_CLI) {
            Route::checkDomain();
        }

        // 监听path_info
        Tag::listen('path_info');
        // 分析PATHINFO信息
        if(!isset($_SERVER['PATH_INFO']) && $_SERVER['SCRIPT_NAME'] != $_SERVER['PHP_SELF']) {
            $types = explode(',', $config['pathinfo_fetch']);
            foreach ($types as $type){
                if(0 === strpos($type, ':')) {// 支持函数判断
                    $_SERVER['PATH_INFO'] = call_user_func(substr($type,1));
                    break;
                }elseif(!empty($_SERVER[$type])) {
                    $_SERVER['PATH_INFO'] = (0 === strpos($_SERVER[$type], $_SERVER['SCRIPT_NAME'])) ?
                        substr($_SERVER[$type], strlen($_SERVER['SCRIPT_NAME'])) : $_SERVER[$type];
                    break;
                }
            }
        }

        // 定位模块
        if(empty($_SERVER['PATH_INFO'])) {
            $_SERVER['PATH_INFO'] = '';
        }
        
		// URL后缀
        define('__EXT__', strtolower(pathinfo($_SERVER['PATH_INFO'],PATHINFO_EXTENSION)));
        $_SERVER['PATH_INFO'] = trim(preg_replace('/\.(' . trim($config['url_html_suffix'], '.') . ')$/i', '', $_SERVER['PATH_INFO']), '/');
        if($_SERVER['PATH_INFO']) {
            $paths = explode($config['pathinfo_depr'], $_SERVER['PATH_INFO']);
            // 获取URL中的模块名
            if($config['require_module'] && !isset($_GET[$var_m])) {
                $_GET[$var_m]         = array_shift($paths);
                $_SERVER['PATH_INFO'] = implode('/', $paths);
            }
        }

        // 获取模块名称
        define('MODULE_NAME', ucwords(strtolower(isset($_GET[$var_m]) ? $_GET[$var_m] : $config['default_module'])));

        // 模块初始化
        if(MODULE_NAME && is_dir( APP_PATH . MODULE_NAME )) {
            define('MODULE_PATH', APP_PATH . MODULE_NAME . '/');
            Tag::listen('app_begin');
            // 加载模块初始化文件
            if(is_file( MODULE_PATH . 'init' . EXT )) {
                include MODULE_PATH . 'init' . EXT;
                $config = Config::get();
            }else{
                // 检测项目（或模块）配置文件
                if(is_file(MODULE_PATH . 'config' . EXT)) {
                    $config = Config::set(include MODULE_PATH . 'config' . EXT);
                }
                if($config['app_status'] && is_file(MODULE_PATH . $config['app_status'] . EXT)) {
                    // 加载对应的项目配置文件
                    $config = Config::set(include MODULE_PATH . $config['app_status'] . EXT);
                }
                // 加载别名文件
                if(is_file(MODULE_PATH . 'alias' . EXT)) {
                    Loader::addMap(include MODULE_PATH . 'alias' . EXT);
                }
                // 加载公共文件
                if(is_file( MODULE_PATH . 'common' . EXT)) {
                    include MODULE_PATH . 'common' . EXT;
                }
                if(is_file(MODULE_PATH . 'tags' . EXT)) {
                    // 行为扩展文件
                    Tag::import(include MODULE_PATH . 'tags' . EXT);
                }
            }
            $var_c = $config['var_controller'];
            $var_a = $config['var_action'];
        }else{
            // 判断favicon.ico
            if('favicon.ico' == strtolower(MODULE_NAME)){
                exit;
            }
            E('module not exists :' . MODULE_NAME);
        }
        // 路由检测和控制器、操作解析
        Route::check($_SERVER['PATH_INFO']);

        // 获取控制器名
        define('CONTROLLER_NAME', strtolower(isset($_GET[$var_c]) ? $_GET[$var_c] : $config['default_controller']));

        // 获取操作名
        define('ACTION_NAME', strtolower(isset($_GET[$var_a]) ? $_GET[$var_a] : $config['default_action']));

        unset($_GET[$var_a], $_GET[$var_c], $_GET[$var_m]);
        //保证$_REQUEST正常取值
        $_REQUEST = array_merge($_POST, $_GET);
    }
}