<?php

namespace App\Http\SymfonyCastDl;

use App\Jobs\GetVideoFileSize;
use App\Models\Chapter;
use App\Models\Course;
use GuzzleHttp\TransferStats;
use GuzzleHttp\Client;
use JetBrains\PhpStorm\NoReturn;

class SymfonyCastDlService
{
    public Client $client;

    public function __construct(public HtmlParser $htmlParser)
    {
        $this->client = new Client([
            'base_uri' => config('symfonycast.base_url'),
            'cookies' => true
        ]);
        $response = $this->client->get('login');
        $token = $htmlParser->getCsrfToken($response);
        $this->client->post('login', [
            'form_params' => [
                'email' => config('symfonycast.login'),
                'password' => config('symfonycast.password'),
                '_csrf_token' => $token
            ],
            'on_stats' => function (TransferStats $stats) use (&$currentUrl) {
                $currentUrl = $stats->getEffectiveUri();
            }
        ]);
    }

    public function getInfo(): void
    {
        $coursePage = $this->client->get('courses/filtering');
        $courses = $this->htmlParser->getCourses($coursePage);
        $courses->each->save();
        /** @var Course $course */
        foreach ($courses as $course) {
            $singleCoursePage = $this->client->get('/screencast/' . $course->link);
            $chapters = $this->htmlParser->getCourseDetails($singleCoursePage, $course->id);
            $chapters->each->save();
            $chapters->each(fn($chapter) => GetVideoFileSize::dispatch($chapter->id));
        }
    }

    public function updateCourse(Course $course): void
    {
        $singleCoursePage = $this->client->get('/screencast/' . $course->link);
        $chapters = $this->htmlParser->getCourseDetails($singleCoursePage, $course->id);
        $chapters->each->save();
        $chapters->each(fn($chapter) => GetVideoFileSize::dispatch($chapter->id));
    }

    public function getChapterInfo(Chapter $chapter): ?string
    {
        $course = $chapter->course;
        $chapterPage = $this->client->get('/screencast/' . $course->link . DIRECTORY_SEPARATOR . $chapter->link);
        return $this->htmlParser->getVideoSource($chapterPage);
    }

    public function videoSize(Chapter $chapter): Chapter
    {
        if (!$chapter->video_size && $chapter->video_link) {
            $response = $this->client->head($chapter->video_link);
            if ($response->hasHeader('Content-Length')) {
                $chapter->video_size = (int)$response->getHeader('Content-Length')[0];
                $chapter->save();
            }
        }
        return $chapter;
    }

    public function downloadFile(Chapter $chapter): void
    {
        if (is_null($chapter->video_link)) {
            return;
        }
        if (!is_dir($chapter->directory_path)) {
            mkdir(directory: $chapter->directory_path, recursive: true);
        }
        if (!$chapter->is_video_file) {
            $this->client->request(
                'GET',
                $chapter->video_link,
                ['sink' => $chapter->video_path],
            );
        }
    }
}