<?php
// DnsEndPoint.php
// Created: 2021-05-02
// Updated: 2023-01-01

namespace Index\Net;

use InvalidArgumentException;
use Stringable;

class DnsEndPoint extends EndPoint implements Stringable {
    private string $host;
    private int $port;

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

    public function getHost(): string {
        return $this->host;
    }

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

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

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

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

    public static function parse(string $string): EndPoint {
        $parts = explode(':', $string);
        if(count($parts) < 2)
            throw new InvalidArgumentException('$string is not a valid host and port combo.');
        return new DnsEndPoint($parts[0], (int)$parts[1]);
    }

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