<?php

declare(strict_types=1);

namespace App\Console\Commands;

use App\Services\Traffic\OnlineVisitorRepository;
use App\Services\Traffic\PresenceIndexPruner;
use Illuminate\Console\Command;
use Illuminate\Support\Facades\Log;
use Illuminate\Support\Facades\Redis;

class PruneOnlineVisitorIndexCommand extends Command
{
    protected $signature = 'skinbase:prune-online-visitor-index
                            {--dry-run : Count stale members without SREM}
                            {--execute : Remove stale members}
                            {--scan-count= : SSCAN COUNT}
                            {--max-batches= : Batches this run}
                            {--max-members= : Members to inspect this run}
                            {--sleep-ms= : Pause between batches}
                            {--time-limit= : Stop after N seconds (0 = none)}';

    protected $description = 'Remove stale members from the online-visitor Redis set (SSCAN, never SMEMBERS)';

    public function handle(PresenceIndexPruner $pruner): int
    {
        $dryRun = (bool) $this->option('dry-run');
        $execute = (bool) $this->option('execute');
        if ($dryRun === $execute) {
            $this->error('Pass exactly one of --dry-run or --execute.');

            return self::FAILURE;
        }

        $scanCount = $this->intOption('scan-count', (int) config('traffic.online_visitors.prune_scan_count', 500));
        $maxBatches = $this->intOption('max-batches', (int) config('traffic.online_visitors.prune_max_batches', 200));
        $maxMembers = $this->intOption('max-members', (int) config('traffic.online_visitors.prune_max_members', 100000));
        $sleepMs = $this->intOption('sleep-ms', (int) config('traffic.online_visitors.prune_sleep_ms', 25));
        $timeLimit = $this->intOption('time-limit', 0);

        $scard = (int) Redis::scard(OnlineVisitorRepository::INDEX_KEY);

        $this->info(sprintf(
            '[prune-online-visitor-index] key=%s prefix=%s scard=%d scan_count=%d max_batches=%d max_members=%d sleep_ms=%d %s',
            OnlineVisitorRepository::INDEX_KEY,
            (string) config('database.redis.options.prefix'),
            $scard,
            $scanCount,
            $maxBatches,
            $maxMembers,
            $sleepMs,
            $dryRun ? 'dry-run' : 'execute'
        ));

        $result = $pruner->prune(
            $scanCount,
            $maxBatches,
            $maxMembers,
            $sleepMs,
            $dryRun,
            $timeLimit > 0 ? $timeLimit : null,
        );

        $this->info(sprintf(
            'scanned=%d stale=%d live=%d removed=%d batches=%d',
            $result['scanned'],
            $result['stale'],
            $result['live'],
            $result['removed'],
            $result['batches']
        ));

        Log::info('[prune-online-visitor-index] completed', $result + ['scard_before' => $scard]);

        return self::SUCCESS;
    }

    private function intOption(string $name, int $default): int
    {
        $raw = $this->option($name);
        if ($raw === null || $raw === '') {
            return $default;
        }

        return max(0, (int) $raw);
    }
}