<?php
// IPEndPoint.php
// Created: 2021-04-30
// Updated: 2023-01-01

namespace Index\Net;

use InvalidArgumentException;
use Index\XString;

class IPEndPoint extends EndPoint {
    private IPAddress $address;
    private int $port;

    public function __construct(IPAddress $address, int $port) {
        if($port < 0 || $port > 0xFFFF)
            throw new InvalidArgumentException('$port is not a valid port number.');
        $this->address = $address;
        $this->port = $port;
    }

    public function getAddress(): IPAddress {
        return $this->address;
    }

    public function hasPort(): bool {
        return $this->port > 0;
    }

    public function getPort(): int {
        return $this->port;
    }

    public function __serialize(): array {
        return [$this->address, $this->port];
    }
    public function __unserialize(array $serialized): void {
        $this->address = $serialized[0];
        $this->port = $serialized[1];
    }

    public function equals(mixed $other): bool {
        return $other instanceof IPEndPoint
            && $this->port === $other->port
            && $this->address->equals($other->address);
    }

    public static function parse(string $string): EndPoint {
        if(str_starts_with($string, '[')) { // IPv6
            $closing = strpos($string, ']');
            if($closing === false)
                throw new InvalidArgumentException('$string is not a valid IP end point.');
            $ip = substr($string, 1, $closing - 1);
            $port = (int)substr($string, $closing + 2);
        } else { // IPv4
            $parts = explode(':', $string, 2);
            if(count($parts) < 2)
                throw new InvalidArgumentException('$string is not a valid IP end point.');
            $ip = $parts[0];
            $port = (int)$parts[1];
        }

        return new IPEndPoint(IPAddress::parse($ip), $port);
    }

    public function __toString(): string {
        if($this->port < 1)
            return $this->address->getAddress();
        return $this->address->getAddress() . ':' . $this->port;
    }
}