<?php

namespace fcgisrv;

require_once(BASE_ROOT_PATH . '/helper/http_header.php');
require_once(BASE_ROOT_PATH . '/helper/performance_helper.php');
require_once(BASE_ROOT_PATH . '/helper/request_helper.php');

use http_header;
use Log;
use request_helper;


abstract class BaseServer
{
    public function __construct() {
        $this->mExFiles = [];
    }

    protected $mExFiles;
    protected function setExFiles(array $files)
    {
        $this->mExFiles = $files;
    }

    public function isIndex($file)
    {
        $path = BASE_PATH . "/index.php";
        return $path == $file;
    }

    protected function is_exclude($file)
    {
        $exister = function ($file, $subex)
        {
            $path = BASE_PATH . $subex;
            $dir = dirname($file);

            return ($path == $dir);
        };

        $file = basename($file);
        if (in_array($file,$this->mExFiles)) {
            return true;
        }

        global $config;
        $exclude_dirs = $config['access_include_dirs'];

        foreach ($exclude_dirs as $dir)
        {
            if($exister($file,$dir)) {
                return true;
            }
        }

        return false;
    }

    private function clear_global()
    {
        $_SESSION = [];
        $_COOKIE = [];
        $_POST = [];
        $_GET = [];
    }

    public function handle_error($level, $message, $file, $line)
    {
        if($level == E_NOTICE) return;
        $trace = "handle_error: level=$level,msg=$message file=$file,line=$line\n";
        $backtrace = debug_backtrace();
        foreach ($backtrace as $item) {
            $trace .= "{$item['file']}\t{$item['line']}\t{$item['function']}\n";
        }

        Log::record($trace, Log::ERR);
    }

    protected function preLooper()
    {
        set_error_handler([$this, 'handle_error']);
    }

    private function cross_domain()
    {
        if(defined('OPEN_CROSS_DOAMIN') && OPEN_CROSS_DOAMIN == true)
        {
            if(defined('CROSS_DOAMIN_HOST') && !empty(CROSS_DOAMIN_HOST))
            {
                $host = CROSS_DOAMIN_HOST;
                fcgi_header("Access-Control-Allow-Headers:DNT,X-Mx-ReqToken,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type, Accept-Language, Origin, Accept-Encoding");
                fcgi_header("Content-Type: text/html; charset=UTF-8");
                fcgi_header("Access-Control-Allow-Credentials: true");
                fcgi_header("Access-Control-Allow-Origin: $host");
                fcgi_header('Access-Control-Allow-Methods: GET, POST, PUT,DELETE,PATCH');
            }
        }
    }

    abstract function handle_request($file);
    public function run_looper()
    {
        $this->preLooper();
        Log::record('Waiting......', Log::DEBUG);

        $index = 0;
        fcgi_init();
        while(fcgi_accept() >= 0)
        {
            $this->clear_global();
            perfor_clear();

            $start = microtime(true);
            Log::start_sql_log();
            {
                ob_start();

                init_request();
                init_cookie($_SERVER['HTTP_COOKIE']);
                http_header::instance()->start();

                $file = request_helper::script_file();
                $this->cross_domain();
                $this->handle_request($file);
                fcgi_headers_sent();

                $contents = ob_get_clean();
                fcgi_echo($contents);
            }
            Log::end_sql_log();
            $ret = fcgi_fini();

            //fcgi_finish();//单线程的情况下不需要调用
            $mem = memory_get_usage();
            $msg = sprintf("index=$index memory=$mem isCgi=$ret request time=%.6f\r\n\r\n", microtime(true) - $start);
            ++$index;
            Log::record($msg ,Log::DEBUG);
        }

        fcgi_fini();
        Log::record('Waiting quit......',Log::DEBUG);
    }
}