<?php declare(strict_types=1);
namespace openvk\Web\Models\Repositories;
use openvk\Web\Models\Entities\{Club, Manager};
use openvk\Web\Models\Repositories\{Aliases, Users};
use Nette\Database\Table\ActiveRow;
use Chandler\Database\DatabaseConnection;

class Clubs
{
    private $context;
    private $clubs;
    private $coadmins;
    
    function __construct()
    {
        $this->context  = DatabaseConnection::i()->getContext();
        $this->clubs    = $this->context->table("groups");
        $this->coadmins = $this->context->table("group_coadmins");
    }
    
    private function toClub(?ActiveRow $ar): ?Club
    {
        return is_null($ar) ? NULL : new Club($ar);
    }
    
    function getByShortURL(string $url): ?Club
    {
        $shortcode = $this->toClub($this->clubs->where("shortcode", $url)->fetch());

        if ($shortcode)
            return $shortcode;

        $alias = (new Aliases)->getByShortcode($url);

        if (!$alias) return NULL;
        if ($alias->getType() !== "club") return NULL;

        return $alias->getClub();
    }
    
    function get(int $id): ?Club
    {
        return $this->toClub($this->clubs->get($id));
    }

    function getByIds(array $ids = []): array
    {
        $clubs = $this->clubs->select('*')->where('id IN (?)', $ids);
        $clubs_array = [];

        foreach($clubs as $club) {
            $clubs_array[] =  $this->toClub($club);
        }

        return $clubs_array;
    }

    function find(string $query, array $params = [], array $order = ['type' => 'id', 'invert' => false], int $page = 1, ?int $perPage = NULL): \Traversable
    {
        $query = "%$query%";
        $result = $this->clubs;
        $order_str = 'id';

        switch($order['type']) {
            default:
            case 'id':
                $order_str = 'id ' . ($order['invert'] ? 'ASC' : 'DESC');
                break;
            case 'subs':
                $sql_query = <<<EOF
                SELECT `groups`.`id`, `subs`
                FROM `groups`
                LEFT JOIN 
                (SELECT `target`, COUNT(`follower`) as `subs`
                FROM `subscriptions`
                WHERE `model` = "openvk\\\\Web\\\\Models\\\\Entities\\\\Club"
                GROUP BY `target`) `subscriptions` ON `subscriptions`.`target` = `groups`.`id`
                WHERE `groups`.`name` LIKE ? OR `groups`.`about` LIKE ?
                ORDER BY `subs` DESC
                LIMIT ? OFFSET ?;
                EOF;

                return new Util\RawEntityStream("Club", $sql_query, $query, $query);
        }

        $result = $result->where("name LIKE ? OR about LIKE ?", $query, $query);

        if($order_str)
            $result->order($order_str);

        return new Util\EntityStream("Club", $result);
    }

    function getCount(): int
    {
        return (clone $this->clubs)->count('*');
    }

    function getPopularClubs(): \Traversable
    {
        // TODO rewrite
        
        /*
        $query   = "SELECT ROW_NUMBER() OVER (ORDER BY `subscriptions` DESC) as `place`, `target` as `id`, COUNT(`follower`) as `subscriptions` FROM `subscriptions` WHERE `model` = \"openvk\\\Web\\\Models\\\Entities\\\Club\" GROUP BY `target` ORDER BY `subscriptions` DESC, `id` LIMIT 30;";
        $entries = DatabaseConnection::i()->getConnection()->query($query);

        foreach($entries as $entry)
            yield (object) [
                "place"         => $entry["place"],
                "club"          => $this->get($entry["id"]),
                "subscriptions" => $entry["subscriptions"],
            ];
        */
    }
	
    function getWriteableClubs(int $id): \Traversable
    {
        $result    = $this->clubs->where("owner", $id);
        $coadmins  = $this->coadmins->where("user", $id);
        
        foreach($result as $entry) {
            yield new Club($entry);
        }

        foreach($coadmins as $coadmin) {
            $cl = new Manager($coadmin);
            yield $cl->getClub();
        }
    }

    function getWriteableClubsCount(int $id): int
    {
        return sizeof($this->clubs->where("owner", $id)) + sizeof($this->coadmins->where("user", $id));
    }

    use \Nette\SmartObject;
}