<?php
namespace XaiCorp\AbcParser\Application\UseCases;

use Enzyme\Axiom\Atoms\StringAtom;
use XaiCorp\AbcParser\Domain\Core\TuneCollection;
use XaiCorp\AbcParser\Domain\Modules\Interpreter\Builder;
use XaiCorp\AbcParser\Domain\Modules\Interpreter\Context;
use XaiCorp\AbcParser\Domain\Modules\Interpreter\DefaultInterpreter;
use XaiCorp\AbcParser\Domain\Modules\Interpreter\Interpreter;

class ImportAbcFile
{
    /**
     * @var Builder
     */
    protected $builderTemplate;

    /**
     * @param Builder|null $builderTemplate
     */
    public function __construct(Builder $builderTemplate = null)
    {
        $this->builderTemplate = $builderTemplate ?: new Builder();
    }

    /**
     * @param string $abc
     * @return TuneCollection
     * @throws \Enzyme\Axiom\Exceptions\AtomException
     */
    public function import(string $abc) : TuneCollection
    {
        $context = new Context(new StringAtom($abc));
        $parser = $this->getBestParser($context);
        $result = $parser->execute($context);

        return $result;
    }

    /**
     * @param Context $context
     * @return Interpreter
     */
    public function getBestParser(Context $context) : Interpreter
    {
        $builder = clone $this->builderTemplate;

        switch($context->getVersion()) {
            default:
                $interpreter = new DefaultInterpreter($builder);
        }

        return $interpreter;
    }
}