<?php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

return new class extends Migration
{
    public function up(): void
    {
        Schema::create('metrics', function (Blueprint $table) {
            $table->id();
            $table->timestamp('sampled_at')->index();
            $table->unsignedInteger('mqtt_messages')->default(0);   // messages since last sample
            $table->float('cpu_load')->nullable();                  // 1-min load average
            $table->unsignedTinyInteger('mem_used_pct')->nullable();
        });
    }

    public function down(): void
    {
        Schema::dropIfExists('metrics');
    }
};