<?php

/*
 * This file is part of RaspiSMS.
 *
 * (c) Pierre-Lin Bonnemaison <plebwebsas@gmail.com>
 *
 * This source file is subject to the GPL-3.0 license that is bundled
 * with this source code in the file LICENSE.
 */

namespace daemons;

use Monolog\Handler\StreamHandler;
use Monolog\Logger;
use Symfony\Component\Process\Exception\ProcessFailedException;
use Symfony\Component\Process\Process;

/**
 * Phone daemon class.
 */
class Phone extends AbstractDaemon
{
    private $max_inactivity = 5 * 60;
    private $msg_queue;
    private $msg_queue_id;
    private $webhook_queue;
    private $last_message_at;
    private $phone;
    private $adapter;
    private $bdd;

    /**
     * Constructor.
     *
     * @param array $phone : A phone table entry
     */
    public function __construct(array $phone)
    {
        $this->phone = $phone;
        $this->msg_queue_id = (int) (QUEUE_ID_PHONE_PREFIX . $this->phone['id']);

        $name = 'RaspiSMS Daemon Phone ' . $this->phone['id'];
        $logger = new Logger($name);
        $logger->pushHandler(new StreamHandler(PWD_LOGS . '/daemons.log', Logger::DEBUG));
        $pid_dir = PWD_PID;
        $no_parent = false; //Phone should be rattach to manager, so manager can stop him easily
        $additional_signals = [];
        $uniq = true; //Each phone should be uniq

        //Construct the daemon
        parent::__construct($name, $logger, $pid_dir, $no_parent, $additional_signals, $uniq);

        parent::start();
    }

    public function run()
    {
        usleep(0.5 * 1000000); //Micro sleep for perfs

        $this->bdd = \descartes\Model::_connect(DATABASE_HOST, DATABASE_NAME, DATABASE_USER, DATABASE_PASSWORD, 'UTF8');

        //Send smss in queue
        $this->send_smss();

        //Read received smss
        $this->read_smss();

        //Stop after 5 minutes of inactivity to avoid useless daemon
        if ((microtime(true) - $this->last_message_at) > $this->max_inactivity)
        {
            posix_kill(getmypid(), SIGTERM); //Send exit signal to the current process

            return false;
        }
    }

    public function on_start()
    {
        //Set last message at to construct time
        $this->last_message_at = microtime(true);

        $this->msg_queue = msg_get_queue($this->msg_queue_id);

        //Instanciate adapter
        $adapter_class = $this->phone['adapter'];
        $this->adapter = new $adapter_class($this->phone['adapter_datas']);

        $this->logger->info('Starting Phone daemon with pid ' . getmypid());
    }

    public function on_stop()
    {
        //Delete queue on daemon close
        $this->logger->info('Closing queue : ' . $this->msg_queue_id);
        msg_remove_queue($this->msg_queue);

        $this->logger->info('Stopping Phone daemon with pid ' . getmypid());
    }

    public function handle_other_signals($signal)
    {
        $this->logger->info('Signal not handled by ' . $this->name . ' Daemon : ' . $signal);
    }

    /**
     * Send sms.
     */
    private function send_smss()
    {
        $tasks = [];

        $find_message = true;
        while ($find_message)
        {
            //Call message
            $msgtype = null;
            $maxsize = 409600;
            $message = null;

            $error_code = null;
            $success = msg_receive($this->msg_queue, QUEUE_TYPE_SEND_MSG, $msgtype, $maxsize, $message, true, MSG_IPC_NOWAIT, $error_code); //MSG_IPC_NOWAIT == dont wait if no message found

            if (!$success && MSG_ENOMSG !== $error_code)
            {
                $this->logger->critical('Error reading MSG SEND Queue, error code : ' . $error_code);

                return false;
            }

            if (!$message)
            {
                $find_message = false;

                continue;
            }

            //Update last message time
            $this->last_message_at = microtime(true);

            //Do message sending
            $this->logger->info('Try send message : ' . json_encode($message));
            $this->logger->info('with : ' . join(' ', [PWD . '/console.php', 'controllers/internals/Console.php', 'send_sms', '--id_phone=' . escapeshellarg($this->phone['id']), '--message=' . escapeshellarg(json_encode($message))]));

            $process = new Process([PWD . '/console.php', 'controllers/internals/Console.php', 'send_sms', '--id_phone=' . $this->phone['id'], '--message=' . json_encode($message)]);
            $tasks[] = ['message' => $message, 'process' => $process];
        }

        foreach ($tasks as $task)
        {
            $task['process']->run();
        }

        $done = false;
        while (! $done)
        {
            usleep(0.001 * 1000000); //Micro sleep for perfs
            
            $done = true;
            foreach ($tasks as $task)
            {
                if ($task['process']->isRunning()) {
                    $done = false;
                    continue;
                }

                if (!$task['process']->isSuccessful()) {
                    $this->logger->error('Failed send message : ' . json_encode($task['message']) . ' with : ' . $task['process']->getErrorOutput() . $task['process']->getOutput());
                    continue;
                }
        
                $this->logger->info('Successfully send message : ' . json_encode($task['message']));
            }
        }
    }

    /**
     * Read smss for a phone.
     */
    private function read_smss()
    {
        $internal_received = new \controllers\internals\Received($this->bdd);

        if (!$this->adapter->meta_support_read())
        {
            return true;
        }

        $response = $this->adapter->read();

        if ($response['error'])
        {
            $this->logger->info('Error reading received smss : ' . $response['error_message']);

            return false;
        }

        if (!$response['smss'])
        {
            return true;
        }

        //Process smss
        foreach ($response['smss'] as $sms)
        {
            $this->logger->info('Receive message : ' . json_encode($sms));
            $response = $internal_received->receive($this->phone['id_user'], $this->phone['id'], $sms['text'], $sms['origin']);

            if ($response['error'])
            {
                $this->logger->error('Failed receive message : ' . json_encode($sms) . ' with error : ' . $response['error_message']);

                continue;
            }

            $this->logger->info('Message received successfully.');
        }
    }
}