<?php

namespace App\Http\SymfonyCastDl;

use App\Models\Chapter;
use App\Models\Course;
use Carbon\Carbon;
use DiDom\Document;
use GuzzleHttp\Psr7\Response;
use Illuminate\Support\Collection;

class HtmlParser
{
    public function getCsrfToken(Response $response): string
    {
        $document = new Document($response->getBody()->getContents());
        return $document->first('input[name="_csrf_token"]')->attr('value');
    }

    public function getCourses(Response $response): Collection
    {
        $courses = new Collection();
        $document = new Document($response->getBody()->getContents());
        foreach ($document->find('div.js-course-item') as $courseItem) {
            $courseId = $courseItem->attr('data-id');
            $course = Course::firstOrNew(['course_id' => $courseId]);
            $course->name = $courseItem->first('h3')->text();
            $course->thumbnail = $courseItem->first('img.course-list-item-img')->attr('src');
            $course->link = last(explode('/', $courseItem->first('a')->attr('href')));
            $course->status = $courseItem->attr('data-status');
            $course->course_id = $courseItem->attr('data-id');
            $course->numberofchapters = $courseItem->attr('data-chapter-count');
            $course->timeswatched = $courseItem->attr('data-times-watched');
            $course->course_duration = $courseItem->first('.font-blue.fal.fa-clock.pr-1')?->parent()?->text();
            $course->published_at = $courseItem->attr('data-date') > 0 ? Carbon::createFromTimestamp(
                $courseItem->attr('data-date')
            ) : null;
            $courses->add($course);
        }
        return $courses;
    }

    public function getCourseDetails(Response $response, int $courseId): Collection
    {
        $document = new Document($response->getBody()->getContents());
        $chapters = new Collection();
        $chapterId = 0;
        foreach ($document->find('ul.chapter-list li') as $chapterItem) {
            if ($chapterItem->first('.col')) {
                $chapterId++;

                $chapter = Chapter::firstOrNew(['course_id' => $courseId, 'order' => $chapterId]);
                $chapter->duration = $chapterItem->first('.length-styling')?->text();
                $chapter->order = $chapterId;
                $chapter->course_id = $courseId;
                if ($link = trim($chapterItem->first('a')->attr('href'), '#')) {
                    $chapter->link = last(explode('/', $link));;
                    $chapter->video_link = config('symfonycast.base_url') . $link . '/download/video';
                }
                $chapter->title = preg_replace('/\v(?:[\v\h]+)/', '', $chapterItem->first('.col')->text());
                $chapter->video_size = 0;
                $chapters->add($chapter);
            }
        }

        return $chapters;
    }

}