<?php

namespace brain\data;

use League\CommonMark\Environment\Environment;
use League\CommonMark\Extension\CommonMark\CommonMarkCoreExtension;
use League\CommonMark\Extension\Strikethrough\StrikethroughExtension;
use League\CommonMark\Extension\Attributes\AttributesExtension;
use League\CommonMark\Extension\FrontMatter\FrontMatterExtension;
use League\CommonMark\Extension\FrontMatter\Output\RenderedContentWithFrontMatter;
use League\CommonMark\MarkdownConverter;
use League\CommonMark\CommonMarkConverter;
use HtmlSanitizer\Extension\Basic\BasicExtension;
use HtmlSanitizer\Extension\Iframe\IframeExtension;
use HtmlSanitizer\SanitizerBuilder;

use function _\orderBy;

class Contents
{
    public $files = [];
    public $config = [];
    public function __construct($folder)
    {
        $this->read($folder);
    }
    public function read($folder)
    {
        $folders = glob("$folder/*", GLOB_ONLYDIR);
        foreach ($folders as $folder) {
            //$this->files[] = $folder . "/";
            $this->read($folder);
        }
        $files = array_filter(glob("$folder/*md"), "is_file");
        foreach ($files as $file) {
            $this->files[] = $file;
        }
    }

    public function getAll()
    {
        $environment = new Environment($this->config);
        $environment->addExtension(new CommonMarkCoreExtension());

        // Add the extension
        $environment->addExtension(new FrontMatterExtension());

        //Add Strikethrough rendering
        $environment->addExtension(new StrikethroughExtension());

        //add attributes to elements in markdown
        $environment->addExtension(new AttributesExtension());

        // Instantiate the converter engine and start converting some Markdown!
        $converter = new MarkdownConverter($environment);

        $contents = [];
        foreach ($this->files as $file) {
            //get meta and html from file
            $result = $converter->convertToHtml(file_get_contents($file));
            $meta = [];
            if ($result instanceof RenderedContentWithFrontMatter) {
                $meta = $result->getFrontMatter();
            }

            //get raw markdown from file
            $frontMatterExtension = new FrontMatterExtension();
            $parsed = $frontMatterExtension
            ->getFrontMatterParser()
            ->parse(file_get_contents($file));

            //never trust the front end. clean it up

            $builder = new SanitizerBuilder();
            $builder->registerExtension(new BasicExtension());
            $builder->registerExtension(new IframeExtension());

            //relative-a and relative-image
            $builder->registerExtension(
                new \HtmlSanitizer\Extension\Relative\A\AExtension()
            );
            $builder->registerExtension(
                new \HtmlSanitizer\Extension\Relative\Image\ImageExtension()
            );

            $detergent = [
            "extensions" => ["basic", "relative-a", "relative-image", "iframe"],
            "tags" => [
              "div" => [
              "allowed_attributes" => ["class", "title", "id", "style"],
              ],
              "img" => [
              "allowed_attributes" => ["src", "alt", "title", "class"],
              ],
              "iframe" => [
              "allowed_attributes" => ["height", "width", "title", "src"],
              ],
            ],
            ];

            $sanitizer = $builder->build($detergent);

            $scrubbed = $sanitizer->sanitize($result->getContent());
            $featureList = explode(",", $meta["feature"]);
            $docs = '';
            if (isset($meta["files"])) {
                $fileList = explode(",", $meta["files"]);
                $docs = $meta["files"];
            } else {
                $fileList = [];
                $docs = '';
            }

            $media = [];
            $files = [];
            foreach ($featureList as $file) {
                $item = trim($file);
                $ext = pathinfo($item, PATHINFO_EXTENSION);
                if ($item != null || $item != "") {
                    array_push($media, ["file" => $item, "type" => trim($ext)]);
                }
            }

            foreach ($fileList as $file) {
                $item = trim($file);
                $ext = pathinfo($item, PATHINFO_EXTENSION);
                if ($item != null || $item != "") {
                    array_push($files, ["file" => $item, "type" => trim($ext)]);
                }
            }

            //sort attributes into page object
            $page = [
            "id" => $meta["id"],
            "uuid" => $meta["uuid"],
            "title" => $meta["title"],
            "feature" => $meta["feature"],
            "files" => $docs,
            "path" => $meta["path"],
            "layout" => $meta["layout"],
            "tags" => $meta["tags"],
            "author" => $meta["author"],
            "created" => date("Y M D d", $meta["created"]),
            "updated" => date("Y M D d", $meta["updated"]),
            "rawCreated" => $meta["created"],
            "rawUpdated" => $meta["updated"],
            "createdYear" => date("Y", $meta["created"]),
            "createdMonth" => date("m", $meta["created"]),
            "deleted" => $meta["deleted"],
            "menu" => $meta["menu"],
            "featured" => $meta["featured"],
            "published" => $meta["published"],
            "slug" => $meta["slug"],
            "filePath" => $file,
            "content" => $parsed->getContent(),
            "html" => $scrubbed,
            "media" => $media,
            "docs" => $files
            ];
            //checks for duplicates
            $uuid = $meta["uuid"];
            $found = current(
                array_filter($contents, function ($item) use ($uuid) {
                    return isset($item["uuid"]) && $uuid == $item["uuid"];
                })
            );

            // if uuid is not present, add it
            if (!$found) {
                array_push($contents, $page);
            }
        }
        $contents = orderBy($contents, ["id"], ["desc"]);
        return $contents;
    }
}