<?php

class Netsync extends Plugin
{
    public function sync()
    {
        $host = $this->config["master"];
        $key = $this->config["key"];

        if (empty($key)) {
            throw new RuntimeException("API key is empty");
        }

        $ch = curl_init("http://" . $host . "/rpc");


        curl_setopt($ch, CURLOPT_HEADER, false);
        curl_setopt($ch, CURLOPT_POST, true);
        curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode([
            "jsonrpc" => "2.0",
            "id" => "1",
            "method" => "getConfig",
            "params" => []
        ]));
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

        curl_setopt($ch, CURLOPT_HTTPHEADER, [
            "X-Auth: " . md5($key),
            "Content-type: application/json"
        ]);

        $output = curl_exec($ch);
        try {
            if ($err = curl_error($ch)) {
                throw new RuntimeException("Failed to fetch remote API: " . $err);
            }
        } finally {
            curl_close($ch);
        }

        $header = @json_decode($output, true);

        $remote_config = $header["result"] ?? null;

        $networks = $remote_config["networks"] ?? null;
        if ($remote_config === null or $networks === null) {
            throw new RuntimeException("Response has invalid data");
        }

        $available = array_keys((new NetworkConfigReader())->getConfigs());

        $remote_enabled = array_filter($networks, function ($e) use ($available) {
            return in_array($e, $available);
        });
        $wrapper = $this->context->getConfig();
        $local_enabled = $wrapper["networks"];
        $diff = array_diff($remote_enabled, $local_enabled);
        if (count($diff) > 0) {
            $wrapper["networks"] = array_values($remote_enabled);
            $wrapper->save();
        }

        $last_hash = $this->config["last_hash"] ?? "";
        $current_hash = md5(json_encode($remote_config));
        if ($last_hash != $current_hash) {
            foreach ($this->context->getRPC()->getPlugins() as $plugin) {
                /**
                 * @var IPluggable $plugin
                 */

                $plugin->onSync($remote_config);
            }
            $this->config["last_hash"] = $current_hash;
            $this->saveConfig();
        }

        return $diff;
    }
}