<?php

declare(strict_types=1);

namespace App\Notification;

use Ntfy\Server;
use Ntfy\Message;
use Ntfy\Client;
use InvalidArgumentException;

/**
 * Send a notification through a ntfy server
 */
class Ntfy implements NotificationInterface
{
    private string $topic = 'default';

    /**
     * Initialize with configuration.
     *
     * Factory method.
     *
     * @param string[] $config Configuration
     */
    public static function factory(array $config): self
    {
        $instance = new self(new Client(new Server($config['domain'])));
        if (isset($config['topic'])) {
            $instance->setTopic($config['topic']);
        }
        return $instance;
    }

    /**
     * @todo The constructor should be private but static code analysis complains.
     */
    public function __construct(private Client $client)
    {
    }

    /**
     * Set the topic of the notification message.
     *
     * @param string $topic Topic length between 1 and 256 characters.
     */
    public function setTopic(string $topic): void
    {
        if (strlen($topic) < 1 || strlen($topic) >= 256) {
            throw new InvalidArgumentException("Invalid topic length");
        }

        $this->topic = $topic;
    }

    /**
     * Return the currently set topic.
     */
    public function getTopic(): string
    {
        return $this->topic;
    }

    /**
     * Push a message with Ntfy
     */
    public function send(string $title, string $message): void
    {
        if (strlen($title) < 1 || strlen($title) >= 256) {
            throw new InvalidArgumentException("Invalid title length");
        }

        if (strlen($message) < 1 || strlen($message) >= 4096) {
            throw new InvalidArgumentException("Invalid message length");
        }

        $msg = new Message();
        $msg->topic($this->getTopic());
        $msg->title($title);
        $msg->body($message);
        $this->client->send($msg);
    }
}