<?php
namespace YTKNS;

final class ZoneView {
    private const THRESHOLD = 60 * 60 * 24;

    public function getTime(): int {
        return $this->view_time ?? 0;
    }

    public static function byZoneAddress(Zone $zone, string $ipAddress): ?self {
        $getZoneView = DB::prepare('
            SELECT `zone_id`,
                UNIX_TIMESTAMP(`view_time`) AS `view_time`,
                INET6_NTOA(`view_address`) AS `view_address`
            FROM `ytkns_zones_views`
            WHERE `zone_id` = :zone
            AND `view_address` = INET6_ATON(:ip)
        ');
        $getZoneView->bindValue('zone', $zone->getId());
        $getZoneView->bindValue('ip', $ipAddress);
        $zoneView = $getZoneView->execute() ? $getZoneView->fetchObject(self::class) : false;
        return $zoneView ? $zoneView : null;
    }

    public static function increment(Zone $zone, string $ipAddress): void {
        $zoneView = self::byZoneAddress($zone, $ipAddress);

        if($zoneView !== null && ($zoneView->getTime() + self::THRESHOLD) > time())
            return;

        $updateZoneView = DB::prepare('
            REPLACE INTO `ytkns_zones_views` (
                `view_address`, `zone_id`, `view_time`
            ) VALUES (
                INET6_ATON(:ip), :zone, NOW()
            )
        ');
        $updateZoneView->bindValue('ip', $ipAddress);
        $updateZoneView->bindValue('zone', $zone->getId());
        if($updateZoneView->execute())
            $zone->incrementViews();
    }
}