<?php

namespace App\Console\Commands;

use App\Models\MetricSample;
use App\Models\Server;
use Illuminate\Console\Command;
use Illuminate\Support\Facades\Cache;

/**
 * Persist a once-a-minute resource sample per server from the live (cache-backed) reading the
 * 15s poller keeps fresh — the long history the Server-Details graph plots. No extra SSH: a server
 * with no fresh cached reading (not polled / offline) simply gets no sample (an honest gap). Prunes
 * beyond the retention window. Scheduled everyMinute in routes/console.php.
 */
class SampleMetrics extends Command
{
    protected $signature = 'clusev:sample-metrics {--retention=30 : Days of history to keep}';

    protected $description = 'Persist a one-per-minute metric history sample per server (and prune old samples)';

    public function handle(): int
    {
        $now = now();
        $rows = [];

        foreach (Server::query()->get(['id']) as $server) {
            $m = Cache::get("metrics:latest:{$server->id}");
            if (! is_array($m)) {
                continue;
            }
            $rows[] = [
                'server_id' => $server->id,
                // Percentages — clamp to 0..100 so a stray reading can never plot outside the chart.
                'cpu' => min(100, max(0, (int) ($m['cpu'] ?? 0))),
                'mem' => min(100, max(0, (int) ($m['mem'] ?? 0))),
                'disk' => min(100, max(0, (int) ($m['disk'] ?? 0))),
                'load' => round((float) ($m['load'] ?? 0), 2),
                'sampled_at' => $now,
            ];
        }

        if ($rows !== []) {
            MetricSample::insert($rows);
        }

        $retention = max(1, (int) $this->option('retention'));
        MetricSample::where('sampled_at', '<', now()->subDays($retention))->delete();

        return self::SUCCESS;
    }
}