<?php
namespace Mince;

use RuntimeException;
use Index\Serialisation\Serialiser;

class RemoteV2 {
    public function __construct(
        private string $endPoint,
        private string $secretKey
    ) {}

    public function getInfo(): object {
        return $this->getRequest('GET', '/');
    }

    public function getWhitelist(string $serverId): object {
        return $this->getRequest('GET', '/whitelist', ['server' => $serverId]);
    }

    public function addToWhitelist(string $serverId, array $userNames): object {
        return $this->postRequest('POST', '/whitelist', [
            'server' => $serverId,
            'names' => json_encode($userNames),
        ]);
    }

    public function removeFromWhitelist(string $serverId, array $userNames): object {
        return $this->getRequest('DELETE', '/whitelist', [
            'server' => $serverId,
            'names' => json_encode($userNames),
        ]);
    }

    public function createSignature(string $method, string $path, array $params, int $time = -1): string {
        if($time < 0)
            $time = time();

        ksort($params);
        $compare = [];

        // other sides supports arrays, not gonna bother here
        foreach($params as $name => $value)
            $compare[] = "{$name}:{$value}";

        $input = "{$time}%{$method} {$path}%" . implode('#', $compare);

        return Serialiser::uriBase64()->serialise(
            hash_hmac('sha256', $input, $this->secretKey, true)
        );
    }

    public function getRequest(string $method, string $path, array $params = []): mixed {
        $time = time();
        $sign = $this->createSignature($method, $path, $params, $time);

        $url = $this->endPoint . $path;
        if(!empty($params))
            $url .= '?' . http_build_query($params);

        $request = curl_init($url);
        curl_setopt_array($request, [
            CURLOPT_AUTOREFERER => false,
            CURLOPT_FAILONERROR => false,
            CURLOPT_FOLLOWLOCATION => true,
            CURLOPT_HEADER => false,
            CURLOPT_RETURNTRANSFER => true,
            CURLOPT_TCP_FASTOPEN => true,
            CURLOPT_CONNECTTIMEOUT => 2,
            CURLOPT_MAXREDIRS => 2,
            CURLOPT_PROTOCOLS => CURLPROTO_HTTPS,
            CURLOPT_TIMEOUT => 5,
            CURLOPT_CUSTOMREQUEST => $method,
            CURLOPT_USERAGENT => 'mc.flashii.net',
            CURLOPT_HTTPHEADER => [
                "X-Mince-Signature: {$sign}",
                "X-Mince-Timestamp: {$time}",
            ],
        ]);
        $response = curl_exec($request);
        curl_close($request);

        if(empty($response))
            throw new RuntimeException('Empty response.');

        $response = json_decode($response);
        if(!empty($response->error))
            throw new RuntimeException($response->error);

        return $response;
    }

    public function postRequest(string $method, string $path, array $params): mixed {
        $time = time();
        $sign = $this->createSignature($method, $path, $params, $time);
        $url = $this->endPoint . $path;

        $request = curl_init($url);
        curl_setopt_array($request, [
            CURLOPT_AUTOREFERER => false,
            CURLOPT_FAILONERROR => false,
            CURLOPT_FOLLOWLOCATION => true,
            CURLOPT_HEADER => false,
            CURLOPT_POST => true,
            CURLOPT_POSTFIELDS => $params,
            CURLOPT_RETURNTRANSFER => true,
            CURLOPT_TCP_FASTOPEN => true,
            CURLOPT_CONNECTTIMEOUT => 2,
            CURLOPT_MAXREDIRS => 2,
            CURLOPT_PROTOCOLS => CURLPROTO_HTTPS,
            CURLOPT_TIMEOUT => 5,
            CURLOPT_CUSTOMREQUEST => $method,
            CURLOPT_USERAGENT => 'mc.flashii.net',
            CURLOPT_HTTPHEADER => [
                "X-Mince-Signature: {$sign}",
                "X-Mince-Timestamp: {$time}",
            ],
        ]);
        $response = curl_exec($request);
        curl_close($request);

        if(empty($response))
            throw new RuntimeException('Empty response.');

        $response = json_decode($response);
        if(!empty($response->error))
            throw new RuntimeException($response->error);

        return $response;
    }
}