<?php
namespace XaiCorp\AbcParser\Domain\Modules\Interpreter\Lexicon;

use Enzyme\Axiom\Atoms\StringAtom;
use XaiCorp\AbcParser\Domain\Atoms\UnsignedIntegerAtom;
use XaiCorp\AbcParser\Domain\Modules\Interpreter\Builder;
use XaiCorp\AbcParser\Domain\Modules\Interpreter\Context;

class MusicLine implements Lex
{
    use LineKeyDataTrait;

    /**
     * @var Builder
     */
    protected $builder;

    public function __construct(Builder $builder)
    {
        $this->builder = $builder;
    }

    /**
     * @param Context $context
     * @param \Closure $next
     * @return mixed
     * @throws \Enzyme\Axiom\Exceptions\AtomException
     */
    public function handle(Context $context, \Closure $next)
    {
        $line = $context->current();
        list($key, $data) = $this->getKeyDataFromLine($line);

        if ($context->getState() === $context::MODE_TUNE_BODY
            && $key !== 'K'
            && $line !== ''
        ) {
            $this->builder->appendMusic(new StringAtom($line));
        }

        return $next($context);
    }
}