<?php

/**
 *
 * DB-IP.com database query and management class
 *
 * Copyright (C) 2022 db-ip.com
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

namespace App\Services\dbip;

use PDO;
use Exception;
use PDOException;
use App\Models\DbipLookup;
use App\Models\DbipLookup2;
use App\Models\DbipLookup3;
use Illuminate\Support\Facades\Storage;


class DBIPException extends Exception {

}

class MyDBIP {

	const VERSION = 4;


	static public function lookup($addr) {
		if ($ret = self::doLookup(self::addrType($addr), inet_pton($addr))) {
			return $ret;
		} 
		return false;
	}

	static public function doLookup($addrType, $addrStart) {

		$res = DbipLookup::where('addr_type', $addrType)->where('ip_start', '<=', $addrStart)->orderBy('ip_start', 'desc')->first();
		$c1 = isset($res->country) ? $res->country : null;

		$res = DbipLookup2::where('addr_type', $addrType)->where('ip_start', '<=', $addrStart)->orderBy('ip_start', 'desc')->first();
		$c2 = isset($res->country) ? $res->country : null;

		if($c1 == $c2){
			return $c1;
		}

		$res = DbipLookup3::where('addr_type', $addrType)->where('ip_start', '<=', $addrStart)->orderBy('ip_start', 'desc')->first();
		if(isset($res->country)){
			return $res->country;
		}

		//look in api

		return false;
	}

	static private function addrType($addr) {
		if (ip2long($addr) !== false) {
			return "ipv4";
		} else if (preg_match('/^[0-9a-fA-F:]+$/', $addr) && @inet_pton($addr)) {
			return "ipv6";
		}
		throw new DBIPException("unknown address type for {$addr}");
	}

	static public function insert($addr, $country) {

		$lookup = new DbipLookup3();
		$lookup->addr_type = self::addrType($addr);
		$lookup->ip_start = inet_pton($addr);
		$lookup->ip_end = inet_pton($addr);
		$lookup->country = strtoupper($country);
		$lookup->save();

	}
	
}