<?php namespace Notes\Cronard;

use Kash\HandleCacheTrait;
use Notes\ObjectResolver;

use Psr\SimpleCache\CacheInterface;
use RuntimeException, DirectoryIterator, Generator, Closure;

class TaskFetcher {
    use HandleCacheTrait;

    protected array $folderList;

    protected Closure $callback;

    public array $defaultMethods = [ 'GET', 'POST' ];

    protected array $annotations;

    public function __construct( ?array $folderList = null, ?array $annotations = null, ? CacheInterface $cache = null)
    {
        $this->cache = $cache;

        if ($folderList !== null) {
            $this->folderList = $folderList;
        }

        if ($annotations !== null) {
            $this->annotations = $annotations;
        }
        else {
            $this->annotations = [
                'method' => [ Annotation\Method\Cronard::class, Attribute\Method\Cronard::class ],
            ];
        }
    }

    public function addFolder($folder) : void
    {
        $this->folderList[] = $folder;
    }

    public function setFolderList(array $list) : void
    {
        $this->folderList = $list;
    }

    public function scan(? array $folders = null) : Generator
    {
        foreach($folders ?: $this->folderList as $namespace => $folder) {
            if ( ! file_exists($folder) ) {
                throw new RuntimeException(sprintf("Folder `%s` can not be found or scanned", $folder));
            }

            foreach (new DirectoryIterator($folder) as $fileinfo) {
                if ( ! $fileinfo->isDot() ) {
                    if ( $fileinfo->isDir() ) {
                        foreach($this->scan([ "{$namespace}\\" . $fileinfo->getBasename() => $fileinfo->getPathname() ]) as $ns2 => $fi2) {
                            yield $ns2 => $fi2;
                        }
                    }
                    else {
                        yield $namespace => $fileinfo;
                    }
                }
            }
        }
    }

    public function compile() : array
    {
        return $this->handleCaching(substr(md5(serialize($this->annotations)), 0, 7), function() : array {
            foreach($this->scan() as $namespace => $file) {
                if (  $file->getExtension() !== "php" ) {
                    continue;
                }

                $class = $this->generateClassname($file->getBasename(".php"), $namespace);

                # Should generate an equivalent of Ulmus's object reflection here !
                $objectResolver = new ObjectResolver($class, true, true, false, true);

                $taskList = $objectResolver->getAnnotationListFromClassname( $this->annotations['method'], false );

                foreach($taskList as $func => $cronard) {
                    foreach($cronard as $task) {
                        $list[] = [ 'class' => $class, 'method' => $func, 'annotation' => $task ];
                    }
                }
            }


            return $list;
        });
    }

    protected function generateClassname($file, $namespace)
    {
        return "\\$namespace\\$file";
    }
}