<?php

namespace MGModule\DNSManager2\mgLibs\custom\reverse;

use \MGModule\DNSManager2\mgLibs\custom\dns\utils\IP;
use \MGModule\DNSManager2\mgLibs\custom\exceptions\ValidationException;
use \MGModule\DNSManager2\mgLibs\custom\helpers\IPManagerIntegration;
use \MGModule\DNSManager2\mgLibs\custom\manager\ClientHelper;
use \MGModule\DNSManager2\mgLibs\custom\manager\GlobalSettingHelper;
use \MGModule\DNSManager2\models\custom\globalsetting\GlobalSettingEnum;
use \MGModule\DNSManager2\models\custom\zone\ZoneTypeEnum;
use \MGModule\DNSManager2\models\whmcs\hostingaddon\hostingaddon;

class IPHelper {

    public static function isCustomIPEnabledForZoneCreate() {
        return GlobalSettingHelper::getSetting(GlobalSettingEnum::ZONE_CREATE_CUSTOM_IP) == 'on';
    }
    
    public static function isCustomIPEnabled() {
        return GlobalSettingHelper::getSetting(GlobalSettingEnum::RDNS_CUSTOM_IP) == 'on';
    }

    public static function isSubnetCustomIPEnabled() {
        return GlobalSettingHelper::getSetting(GlobalSettingEnum::RDNS_SUBNET_CUSTOM_IP) == 'on';
    }
    
    public static function getIPsArray($clientid, $type, $relid) {
        $out = array();
        $client = new ClientHelper($clientid);
        
        if(GlobalSettingHelper::getSetting(GlobalSettingEnum::SERVICE_ONLY_IPS)) {
            if($type == ZoneTypeEnum::DOMAIN || $type == ZoneTypeEnum::OTHER) {
                return array('pools' => array(), 'ips' => array());
            }
            
            if($type == ZoneTypeEnum::ADDON) {
                $serviceid = hostingaddon::factory($relid)->hostingid;
            } else {
                $serviceid = $relid;
            }
            
            $out['pools'] = IPManagerIntegration::getIPPoolsForService($serviceid);
            $out['all_ips'] = $out['ips'] = $client->getIPsForService($serviceid);
        } else {
            $out['pools'] = IPManagerIntegration::getIPPoolsForClient($clientid);
            $out['all_ips'] = $out['ips'] = $client->getClientIPs();
        }
        
        foreach($out['pools'] as $pk => $pool) {
            $empty_pool = true;
            foreach($out['ips'] as $k => $ip) {
                $ip = new IP($ip);
                if($ip->isInNetwork($pool['pool'], $pool['mask'])) {
                    unset($out['ips'][$k]);
                    $empty_pool = false;
                }
            }
            
            if($empty_pool && !self::isSubnetCustomIPEnabled()) {
                unset($out['pools'][$pk]);
            }
        }
        return $out;
    }
    
    public static function validateIfClientCanUseIP($clientid, $type, $relid, $ip, $zone_create = false) {
        $ip = new IP($ip);
        if(!$ip->isValid()) {
            throw new ValidationException('Invalid IP', 1);
        }
        
        if(( $zone_create === FALSE && self::isCustomIPEnabled() ) 
                || ($zone_create === TRUE && self::isCustomIPEnabledForZoneCreate()) ) {
            return true;
        }
        
        $ip_array = self::getIPsArray($clientid, $type, $relid);
        if( !self::isSubnetCustomIPEnabled() ) {
            if(!in_array((string)$ip, $ip_array['all_ips'])) {
                throw new ValidationException("You cannot use IP that do not belongs to you", 301);
            }
            return true;
        }
        
        if(in_array((string)$ip, $ip_array['ips'])) {
            return true;
        }
        
        foreach($ip_array['pools'] as $pool) {
            if($ip->isInNetwork($pool['pool'], $pool['mask'])) {
                return true;
            }
        }
        
        throw new ValidationException("You cannot use IP that does not belong to subnet", 302);
    }
}