<?php

namespace App\Providers;

use Illuminate\Cache\RateLimiting\Limit;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\RateLimiter;
use Illuminate\Support\ServiceProvider;
use App\Services\Upload\Contracts\UploadDraftServiceInterface;
use App\Services\Upload\UploadDraftService;
use Illuminate\Support\Facades\View;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\Event;
use Illuminate\Support\Facades\Log;
use Illuminate\Queue\Events\JobFailed;

class AppServiceProvider extends ServiceProvider
{
    /**
     * Register any application services.
     */
    public function register(): void
    {
        // Bind UploadDraftService interface to implementation
        $this->app->singleton(UploadDraftServiceInterface::class, function ($app) {
            return new UploadDraftService($app->make('filesystem'));
        });
    }

    /**
     * Bootstrap any application services.
     */
    public function boot(): void
    {
        $this->configureAuthRateLimiters();
        $this->configureUploadRateLimiters();
        $this->configureMailFailureLogging();

        // Provide toolbar counts and user info to layout views (port of legacy toolbar logic)
        View::composer(['layouts.nova', 'layouts.nova.*'], function ($view) {
            $uploadCount = $favCount = $msgCount = $noticeCount = 0;
            $avatarHash = null;
            $displayName = null;
            $userId = null;

            if (Auth::check()) {
                $userId = Auth::id();
                try {
                    $uploadCount = DB::table('artworks')->where('user_id', $userId)->count();
                } catch (\Throwable $e) {
                    $uploadCount = 0;
                }

                try {
                    // legacy table name fallback handled elsewhere; here we look for user_favorites or favourites
                    $favCount = DB::table('user_favorites')->where('user_id', $userId)->count();
                } catch (\Throwable $e) {
                    try {
                        $favCount = DB::table('favourites')->where('user_id', $userId)->count();
                    } catch (\Throwable $e) {
                        $favCount = 0;
                    }
                }

                try {
                    $msgCount = DB::table('messages')->where('reciever_id', $userId)->whereNull('read_at')->count();
                } catch (\Throwable $e) {
                    $msgCount = 0;
                }

                try {
                    $noticeCount = DB::table('notification')->where('user_id', $userId)->where('new', 1)->count();
                } catch (\Throwable $e) {
                    $noticeCount = 0;
                }

                try {
                    $profile = DB::table('user_profiles')->where('user_id', $userId)->first();
                    $avatarHash = $profile->avatar_hash ?? null;
                } catch (\Throwable $e) {
                    $avatarHash = null;
                }

                $displayName = Auth::user()->name ?: (Auth::user()->username ?? '');
            }

            $view->with(compact('userId','uploadCount', 'favCount', 'msgCount', 'noticeCount', 'avatarHash', 'displayName'));
        });
    }

    private function configureAuthRateLimiters(): void
    {
        RateLimiter::for('register-ip', function (Request $request): Limit {
            $limit = max(1, (int) config('registration.ip_per_minute_limit', 3));

            return Limit::perMinute($limit)->by('register:ip:' . $request->ip());
        });

        RateLimiter::for('register-ip-daily', function (Request $request): Limit {
            $limit = max(1, (int) config('registration.ip_per_day_limit', 20));

            return Limit::perDay($limit)->by('register:ip:daily:' . $request->ip());
        });

        RateLimiter::for('register', function (Request $request): array {
            $emailKey = strtolower((string) $request->input('email', 'unknown'));
            $ipLimit = (int) config('registration.ip_per_minute_limit', 3);
            $emailLimit = (int) config('registration.email_per_minute_limit', 6);

            return [
                Limit::perMinute($ipLimit)->by('register:ip:' . $request->ip()),
                Limit::perMinute($emailLimit)->by('register:email:' . $emailKey),
            ];
        });
    }

    private function configureMailFailureLogging(): void
    {
        Event::listen(JobFailed::class, function (JobFailed $event): void {
            if (! str_contains(strtolower($event->job->resolveName()), 'sendqueuedmailable')) {
                return;
            }

            Log::warning('mail delivery failed', [
                'transport' => config('mail.default'),
                'job_name' => $event->job->resolveName(),
                'queue' => $event->job->getQueue(),
                'connection' => $event->connectionName,
                'exception' => $event->exception->getMessage(),
            ]);
        });
    }

    private function configureUploadRateLimiters(): void
    {
        RateLimiter::for('uploads-init', function (Request $request): array {
            return $this->buildUploadLimits($request, 'init');
        });

        RateLimiter::for('uploads-finish', function (Request $request): array {
            return $this->buildUploadLimits($request, 'finish');
        });

        RateLimiter::for('uploads-status', function (Request $request): array {
            return $this->buildUploadLimits($request, 'status');
        });
    }

    private function buildUploadLimits(Request $request, string $key): array
    {
        $config = (array) config('uploads.rate_limits.' . $key, []);
        $decay = (int) config('uploads.rate_limits.decay_minutes', 1);
        $perUser = (int) ($config['per_user'] ?? 0);
        $perIp = (int) ($config['per_ip'] ?? 0);

        $limits = [];

        if ($perUser > 0) {
            $userId = $request->user()?->id ?? 'guest';
            $limits[] = Limit::perMinutes($decay, $perUser)->by('u:' . $userId);
        }

        if ($perIp > 0) {
            $limits[] = Limit::perMinutes($decay, $perIp)->by('ip:' . $request->ip());
        }

        return $limits;
    }
}