<?php
class Logger
{
    public function __construct(/*Logging $logger*/)
    {
    }
    public function logger($type, $message)
    {
        $log = sprintf("%s\t%s\t%s\n", date('Y-m-d H:i:s'), $type, $message);
        file_put_contents(sprintf(__DIR__ . "/../log/sender.%s.log", date('Y-m-d')), $log, FILE_APPEND);
    }
}
final class Signal{
    public static $signo = 0;
    protected static $ini = null;
    public static function set($signo){
        self::$signo = $signo;
    }
    public static function get(){
        return(self::$signo);
    }
    public static function reset(){
        self::$signo = 0;
    }
}


class Test extends Logger
{
    //public static $signal = null;

    public function __construct()
    {
        //self::$signal == null;
    }

    public function run()
    {
        while (true) {
            pcntl_signal_dispatch();
            printf(".123");
            sleep(1);
            if (Signal::get() == SIGHUP) {
                Signal::reset();
                break;
            }
        }
        printf("\n");
    }
}

class Daemon extends Logger {
    /* config */
    const LISTEN = "tcp://192.168.2.15:5555";
    const pidfile 	= __CLASS__;
    const uid		= 80;
    const gid		= 80;
    const sleep	= 5;

    protected $pool 	= NULL;
    protected $config	= array();

    public function __construct($uid, $gid, $class) {
        $this->pidfile = '/var/run/'.basename(get_class($class), '.php').'.pid';
        //$this->config = parse_ini_file('sender.ini', true); //include_once(__DIR__."/config.php");
        $this->uid = $uid;
        $this->gid = $gid;
        $this->class = $class;
        $this->classname = get_class($class);

        $this->signal();
    }
    public function signal(){

        pcntl_signal(SIGHUP,  function($signo) /*use ()*/{
            //echo "\n This signal is called. [$signo] \n";
            printf("The process has been reload.\n");
            Signal::set($signo);
        });

    }
    private function daemon(){
        if (file_exists($this->pidfile)) {
            echo "The file $this->pidfile exists.\n";
            exit();
        }

        $pid = pcntl_fork();
        if ($pid == -1) {
            die('could not fork');
        } else if ($pid) {
            // we are the parent
            //pcntl_wait($status); //Protect against Zombie children
            exit($pid);
        } else {
            file_put_contents($this->pidfile, getmypid());
            posix_setuid(self::uid);
            posix_setgid(self::gid);
            return(getmypid());
        }
    }
    private function run(){

        while(true){

            printf("The process begin.\n");
            $this->class->run();
            printf("The process end.\n");

        }
    }
    private function foreground(){
        $this->run();
    }
    private function start(){
        $pid = $this->daemon();
        for(;;){
            $this->run();
            sleep(self::sleep);
        }
    }
    private function stop(){

        if (file_exists($this->pidfile)) {
            $pid = file_get_contents($this->pidfile);
            posix_kill($pid, 9);
            unlink($this->pidfile);
        }
    }
    private function reload(){
        if (file_exists($this->pidfile)) {
            $pid = file_get_contents($this->pidfile);
            //posix_kill(posix_getpid(), SIGHUP);
            posix_kill($pid, SIGHUP);
        }
    }
    private function status(){
        if (file_exists($this->pidfile)) {
            $pid = file_get_contents($this->pidfile);
            system(sprintf("ps ax | grep %s | grep -v grep", $pid));
        }
    }
    private function help($proc){
        printf("%s start | stop | restart | status | foreground | help \n", $proc);
    }
    public function main($argv){

        if(count($argv) < 2){
            $this->help($argv[0]);
            printf("please input help parameter\n");
            exit();
        }
        if($argv[1] === 'stop'){
            $this->stop();
        }else if($argv[1] === 'start'){
            $this->start();
        }else if($argv[1] === 'restart'){
            $this->stop();
            $this->start();
        }else if($argv[1] === 'status'){
            $this->status();
        }else if($argv[1] === 'foreground'){
            $this->foreground();
        }else if($argv[1] === 'reload'){
            $this->reload();
        }else{
            $this->help($argv[0]);
        }
    }
}

$daemon = new Daemon(80,80, new Test());
$daemon->main($argv);

