<?php declare(strict_types=1);
namespace openvk\Web\Models\Entities;
use openvk\Web\Util\Shell\Shell;
use openvk\Web\Util\Shell\Shell\Exceptions\ShellUnavailableException;
use openvk\Web\Util\Shell\Shell\Exceptions\UnknownCommandException;
use openvk\Web\Models\VideoDrivers\VideoDriver;
use Nette\InvalidStateException as ISE;

define("VIDEOS_FRIENDLY_ERROR", "Uploads are disabled on this instance :<", false);

class Video extends Media
{
    const TYPE_DIRECT = 0;
    const TYPE_EMBED  = 1;
    
    protected $tableName     = "videos";
    protected $fileExtension = "ogv";
    
    protected function saveFile(string $filename, string $hash): bool
    {
        if(!Shell::commandAvailable("ffmpeg")) exit(VIDEOS_FRIENDLY_ERROR);
        
        try {
            if(!is_dir($dirId = $this->pathFromHash($hash)))
                mkdir($dirId);
            
            Shell::bash(__DIR__ . "/../shell/processVideo.sh", OPENVK_ROOT, $filename, $hash)->start(); #async :DDD
        } catch(ShellUnavailableException $suex) {
            exit(OPENVK_ROOT_CONF["openvk"]["debug"] ? "Shell is unavailable" : VIDEOS_FRIENDLY_ERROR);
        } catch(UnknownCommandException $ucex) {
            exit(OPENVK_ROOT_CONF["openvk"]["debug"] ? "bash is not installed" : VIDEOS_FRIENDLY_ERROR);
        }
        
        usleep(200100);
        return true;
    }
    
    function getName(): string
    {
        return $this->getRecord()->name;
    }
    
    function getType(): int
    {
        if(!is_null($this->getRecord()->hash))
            return Video::TYPE_DIRECT;
        else if(!is_null($this->getRecord()->link))
            return Video::TYPE_EMBED;
    }
    
    function getVideoDriver(): ?VideoDriver
    {
        if($this->getType() !== Video::TYPE_EMBED)
            return NULL;
        
        [$videoDriver, $pointer] = explode(":", $this->getRecord()->link);
        $videoDriver = "openvk\\Web\\Models\\VideoDrivers\\$videoDriver" . "VideoDriver";
        if(!class_exists($videoDriver))
            return NULL;
        
        return new $videoDriver($pointer);
    }
    
    function getThumbnailURL(): string
    {
        if($this->getType() === Video::TYPE_DIRECT) {
            return preg_replace("%\.[A-z]++$%", ".gif", $this->getURL());
        } else {
            return $this->getVideoDriver()->getThumbnailURL();
        }
    }
    
    function setLink(string $link): string
    {
        if(preg_match(file_get_contents(__DIR__ . "/../VideoDrivers/regex/youtube.txt"), $link, $matches)) {
            $pointer = "YouTube:$matches[1]";
        } else if(preg_match(file_get_contents(__DIR__ . "/../VideoDrivers/regex/vimeo.txt"), $link, $matches)) {
            $pointer = "Vimeo:$matches[1]";
        } else {
            throw new ISE("Invalid link");
        }
        
        $this->stateChanges("link", $pointer);
        
        return $pointer;
    }
}