class DefaultPrinter

final class DefaultPrinter implements Printer {
    
    /**
     * @psalm-var closed-resource|resource
     */
    private $stream;
    private readonly bool $isPhpStream;
    private bool $isOpen;
    
    /**
     * @throws CannotOpenSocketException
     * @throws DirectoryDoesNotExistException
     * @throws InvalidSocketException
     */
    public static function from(string $out) : self {
        return new self($out);
    }
    
    /**
     * @throws CannotOpenSocketException
     * @throws DirectoryDoesNotExistException
     * @throws InvalidSocketException
     */
    public static function standardOutput() : self {
        return new self('php://stdout');
    }
    
    /**
     * @throws CannotOpenSocketException
     * @throws DirectoryDoesNotExistException
     * @throws InvalidSocketException
     */
    public static function standardError() : self {
        return new self('php://stderr');
    }
    
    /**
     * @throws CannotOpenSocketException
     * @throws DirectoryDoesNotExistException
     * @throws InvalidSocketException
     */
    private function __construct(string $out) {
        $this->isPhpStream = str_starts_with($out, 'php://');
        if (str_starts_with($out, 'socket://')) {
            $tmp = explode(':', str_replace('socket://', '', $out));
            if (count($tmp) !== 2) {
                throw new InvalidSocketException($out);
            }
            $stream = @fsockopen($tmp[0], (int) $tmp[1]);
            if ($stream === false) {
                throw new CannotOpenSocketException($tmp[0], (int) $tmp[1]);
            }
            $this->stream = $stream;
            $this->isOpen = true;
            return;
        }
        if (!$this->isPhpStream && !Filesystem::createDirectory(dirname($out))) {
            throw new DirectoryDoesNotExistException(dirname($out));
        }
        $this->stream = fopen($out, 'wb');
        $this->isOpen = true;
    }
    public function print(string $buffer) : void {
        assert($this->isOpen);
        fwrite($this->stream, $buffer);
    }
    public function flush() : void {
        if ($this->isOpen && $this->isPhpStream) {
            fclose($this->stream);
            $this->isOpen = false;
        }
    }

}