<?php
namespace Misuzu\Http\Handlers;

use Misuzu\Config;
use Misuzu\Config\CfgType;
use Misuzu\DB;
use Misuzu\Pagination;
use Misuzu\Template;
use Misuzu\Changelog\ChangelogChange;
use Misuzu\News\NewsPost;
use Misuzu\Users\User;
use Misuzu\Users\UserSession;

final class HomeHandler extends Handler {
    public function index($response, $request): void {
        if(UserSession::hasCurrent())
            $this->home($response, $request);
        else
            $this->landing($response, $request);
    }

    public function landing($response, $request): void {
        $linkedData = Config::get('social.embed_linked', CfgType::T_BOOL)
            ? [
                'name' => Config::get('site.name', CfgType::T_STR, 'Misuzu'),
                'url' => Config::get('site.url', CfgType::T_STR),
                'logo' => Config::get('site.ext_logo', CfgType::T_STR),
                'same_as' => Config::get('social.linked', CfgType::T_ARR),
            ] : null;


        $featuredNews = NewsPost::all(new Pagination(3), true);

        $stats = DB::query(
            'SELECT'
            . ' (SELECT COUNT(`user_id`) FROM `msz_users` WHERE `user_deleted` IS NULL) AS `count_users_all`,'
            . ' (SELECT COUNT(`user_id`) FROM `msz_users` WHERE `user_active` >= DATE_SUB(NOW(), INTERVAL 5 MINUTE)) AS `count_users_online`,'
            . ' (SELECT COUNT(`user_id`) FROM `msz_users` WHERE `user_active` >= DATE_SUB(NOW(), INTERVAL 24 HOUR)) AS `count_users_active`,'
            . ' (SELECT COUNT(`comment_id`) FROM `msz_comments_posts` WHERE `comment_deleted` IS NULL) AS `count_comments`,'
            . ' (SELECT COUNT(`topic_id`) FROM `msz_forum_topics` WHERE `topic_deleted` IS NULL) AS `count_forum_topics`,'
            . ' (SELECT COUNT(`post_id`) FROM `msz_forum_posts` WHERE `post_deleted` IS NULL) AS `count_forum_posts`'
        )->fetch();

        $onlineUsers = DB::query(
            'SELECT u.`user_id`, u.`username`, COALESCE(u.`user_colour`, r.`role_colour`) AS `user_colour`'
            . ' FROM `msz_users` AS u'
            . ' LEFT JOIN `msz_roles` AS r'
            . ' ON r.`role_id` = u.`display_role`'
            . ' WHERE u.`user_active` >= DATE_SUB(NOW(), INTERVAL 5 MINUTE)'
            . ' ORDER BY u.`user_active` DESC, RAND()'
            . ' LIMIT 100'
        )->fetchAll();

        // TODO: don't hardcode forum ids
        $featuredForums = Config::get('landing.forum_categories', CfgType::T_ARR);

        $popularTopics = [];
        $activeTopics = [];

        if(!empty($featuredForums)) {
            $getPopularTopics = DB::prepare(
                'SELECT t.`topic_id`, c.`forum_id`, t.`topic_title`, c.`forum_icon`, t.`topic_count_views`'
                . ', (SELECT COUNT(*) FROM `msz_forum_posts` AS p WHERE p.`topic_id` = t.`topic_id` AND `post_deleted` IS NULL) AS `topic_count_posts`'
                . ' FROM `msz_forum_topics` AS t'
                . ' LEFT JOIN `msz_forum_categories` AS c ON c.`forum_id` = t.`forum_id`'
                . ' WHERE c.`forum_id` IN (' . implode(',', $featuredForums) . ') AND `topic_deleted` IS NULL AND `topic_locked` IS NULL'
                . ' ORDER BY (SELECT COUNT(*) FROM `msz_forum_posts` AS p WHERE p.`topic_id` = t.`topic_id` AND `post_deleted` IS NULL AND `post_created` > NOW() - INTERVAL 3 MONTH) DESC'
            )->stmt;
            $getPopularTopics->execute();
            for($i = 0; $i < 10; ++$i) {
                $topicInfo = $getPopularTopics->fetchObject();
                if(empty($topicInfo))
                    break;
                $popularTopics[] = $topicInfo;
            }

            $getActiveTopics = DB::prepare(
                'SELECT t.`topic_id`, c.`forum_id`, t.`topic_title`, c.`forum_icon`, t.`topic_count_views`'
                . ', (SELECT COUNT(*) FROM `msz_forum_posts` AS p WHERE p.`topic_id` = t.`topic_id` AND `post_deleted` IS NULL) AS `topic_count_posts`'
                . ', (SELECT MAX(`post_id`) FROM `msz_forum_posts` AS p WHERE p.`topic_id` = t.`topic_id` AND `post_deleted` IS NULL) AS `latest_post_id`'
                . ' FROM `msz_forum_topics` AS t'
                . ' LEFT JOIN `msz_forum_categories` AS c ON c.`forum_id` = t.`forum_id`'
                . ' WHERE c.`forum_id` IN (' . implode(',', $featuredForums) . ') AND `topic_deleted` IS NULL AND `topic_locked` IS NULL'
                . ' ORDER BY `topic_bumped` DESC'
            )->stmt;
            $getActiveTopics->execute();
            for($i = 0; $i < 10; ++$i) {
                $topicInfo = $getActiveTopics->fetchObject();
                if(empty($topicInfo))
                    break;
                $activeTopics[] = $topicInfo;
            }
        }

        $response->setContent(Template::renderRaw('home.landing', [
            'statistics' => $stats,
            'online_users' => $onlineUsers,
            'featured_news' => $featuredNews,
            'linked_data' => $linkedData,
            'forum_popular' => $popularTopics,
            'forum_active' => $activeTopics,
        ]));
    }

    public function home($response, $request): void {
        $featuredNews = NewsPost::all(new Pagination(5), true);

        $stats = DB::query(
            'SELECT'
            . ' (SELECT COUNT(`user_id`) FROM `msz_users` WHERE `user_deleted` IS NULL) AS `count_users_all`,'
            . ' (SELECT COUNT(`user_id`) FROM `msz_users` WHERE `user_active` >= DATE_SUB(NOW(), INTERVAL 5 MINUTE)) AS `count_users_online`,'
            . ' (SELECT COUNT(`user_id`) FROM `msz_users` WHERE `user_active` >= DATE_SUB(NOW(), INTERVAL 24 HOUR)) AS `count_users_active`,'
            . ' (SELECT COUNT(`comment_id`) FROM `msz_comments_posts` WHERE `comment_deleted` IS NULL) AS `count_comments`,'
            . ' (SELECT COUNT(`topic_id`) FROM `msz_forum_topics` WHERE `topic_deleted` IS NULL) AS `count_forum_topics`,'
            . ' (SELECT COUNT(`post_id`) FROM `msz_forum_posts` WHERE `post_deleted` IS NULL) AS `count_forum_posts`'
        )->fetch();

        $changelog = ChangelogChange::all(new Pagination(10));

        $birthdays  = User::byBirthdate();
        $latestUser = !empty($birthdays) ? null : User::byLatest();

        $onlineUsers = DB::query(
            'SELECT u.`user_id`, u.`username`, COALESCE(u.`user_colour`, r.`role_colour`) AS `user_colour`'
            . ' FROM `msz_users` AS u'
            . ' LEFT JOIN `msz_roles` AS r'
            . ' ON r.`role_id` = u.`display_role`'
            . ' WHERE u.`user_active` >= DATE_SUB(NOW(), INTERVAL 5 MINUTE)'
            . ' ORDER BY u.`user_active` DESC, RAND()'
            . ' LIMIT 104'
        )->fetchAll();

        $response->setContent(Template::renderRaw('home.home', [
            'statistics' => $stats,
            'latest_user' => $latestUser,
            'online_users' => $onlineUsers,
            'birthdays' => $birthdays,
            'featured_changelog' => $changelog,
            'featured_news' => $featuredNews,
        ]));
    }
}